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Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 1995
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 [ ] [ ] [ ] [ ] [ ] 51.18 & 132.5 & 796.5 " 223.5 112.8 & 98.77 & 37.33 & 1
2 [ ] [ ] [ ] [ ] [ ] 56.35 & 125.8 & 610.8 " 241.3 108.9 & 97.16 & 37.02 & 2
3 [ ] [ ] [ ] [ ] [ ] 55.70 & 116.1 & 500.2 " 342.9 " 106.7 & 84.34 & 35.47 & 3
4 [ ] [ ] [ ] [ ] [ ] 52.57 & 107.6 & 410.5 " 498.7 " 102.8 & 78.68 & 31.83 & 4
5 [ ] [ ] [ ] [ ] [ ] 55.04 & 102.8 & 339.5 364.4 " 101.5 & 72.28 & 30.34 & 5
6 [ ] [ ] [ ] [ ] [ ] 102.2 & 160.7 & 297.8 349.0 " 101.2 & 66.39 & 28.49 & 6
7 [ ] [ ] [ ] [ ] [ ] 218.2 & 162.0 & 270.8 403.1 " 100.9 & 66.13 & 26.20 & 7
8 [ ] [ ] [ ] [ ] [ ] 443.9 " 200.8 & 255.6 324.2 96.38 & 72.81 & 25.34 & 8
9 [ ] [ ] [ ] [ ] [ ] 642.4 " 427.4 " 826.4 " 303.1 102.8 & 79.51 & 24.83 & 9
10 [ ] [ ] [ ] [ ] [ ] 456.9 " 476.6 " 767.8 " 272.3 101.7 & 73.81 & 23.74 & 10
11 [ ] [ ] [ ] [ ] [ ] 252.3 359.0 " 550.4 " 247.2 107.6 & 68.13 & 21.81 & 11
12 [ ] [ ] [ ] [ ] [ ] 195.8 & 755.2 " 522.6 " 237.4 117.2 & 63.69 & 20.28 & 12
13 [ ] [ ] [ ] [ ] [ ] 180.2 & 772.0 " 787.6 " 223.4 101.8 & 59.49 & 20.08 & 13
14 [ ] [ ] [ ] [ ] [ ] 171.1 & 486.1 " 620.9 " 214.5 92.60 & 56.02 & 19.35 & 14
15 [ ] [ ] [ ] [ ] [ ] 148.8 & 381.2 454.5 " 215.3 85.40 & 53.33 & 17.78 & 15
16 [ ] [ ] [ ] [ ] [ ] 128.3 & 407.6 382.8 201.8 81.95 & 50.21 & 17.49 & 16
17 [ ] [ ] [ ] [ ] [ ] 114.6 & 344.8 446.2 " 191.6 & 95.34 & 48.00 & 18.31 & 17
18 [ ] [ ] [ ] [ ] [ ] 103.9 & 279.8 411.1 " 193.4 & 201.6 & 45.85 & 17.30 & 18
19 [ ] [ ] [ ] [ ] [ ] 96.23 & 388.4 " 350.4 " 185.0 & 191.8 & 42.57 & 16.53 & 19
20 [ ] [ ] [ ] [ ] [ ] 110.7 &1195 " 490.1 " 179.1 & 136.2 & 41.69 & 13.06 & 20
21 [ ] [ ] [ ] [ ] [ ] 176.5 &1176 " 408.5 " 169.0 & 110.8 & 39.94 & 15.24 & 21
22 [ ] [ ] [ ] [ ] [ ] 164.4 & 679.5 " 365.3 160.0 & 98.22 & 37.83 & 18.71 & 22
23 [ ] [ ] [ ] [ ] [ ] 175.7 & 481.2 " 341.2 154.6 & 88.84 & 36.10 & 20.92 & 23
24 [ ] [ ] [ ] [ ] [ ] 197.0 & 614.9 " 339.3 145.4 & 82.70 & 35.08 & 34.85 & 24
25 [ ] [ ] [ ] [ ] [ ] 189.9 &1390 " 329.5 139.3 & 77.96 & 35.48 & 37.54 & 25
26 [ ] [ ] [ ] [ ] [ ] 211.9 1015 " 317.0 133.5 & 74.63 & 38.03 & 30.19 & 26
27 [ ] [ ] [ ] [ ] 46.88 & 194.5 & 746.4 " 302.9 128.5 & 71.73 & 40.61 & 25.10 & 27
28 [ ] [ ] [ ] [ ] 51.58 & 164.1 & 729.9 " 269.3 124.3 & 68.14 & 40.69 & 23.13 & 28
29 [ ] [ ] [ ] 77.16 & 140.9 &2337 & 249.7 119.0 & 66.15 & 38.39 & 23.10 & 29
30 [ ] [ ] [ ] 66.80 & 136.1 &1459 & 237.5 113.8 & 71.23 & 36.97 & 21.84 & 30
31 [ ] [ ] 56.30 & 957.7 " 232.0 85.06 & 19.51 & 31
Mean [ ] [ ] [ ] [ ] 59.74 & 179.6 & 611.9 & 435.0 " 226.6 & 101.4 & 56.60 & 24.28 &
Median [ ] [ ] [ ] [ ] 56.30 & 164.2 & 476.6 & 382.8 " 208.2 & 100.9 & 51.77 & 23.10 &
Maximum [ ] [ ] [ ] [ ] 77.16 & 642.4 &2337 & 826.4 " 498.7 & 201.6 & 98.77 & 37.54 &
Minimum [ ] [ ] [ ] [ ] 46.88 & 51.18 & 102.8 & 232.0 " 113.8 & 66.15 & 35.08 & 13.06 &
Total [ ] [ ] [ ] [ ] 298.7 & 5388 &18968 &13485 " 6799 & 3143 & 1698 & 752.7 &
Missing Days 31 28 31 30 26 0 0 0 0 0 0 0
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 230.7 & " ... Relative Uncertainty +/-10%
Ann. Median 124.3 & & ... Relative Uncertainty +/-30%
Annual Total 50531 & [ ... Not Available
Missing Days 146
Maximum Minimum
Daily 2337 & 13.06 &
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 1996
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 17.35 & 4.007& 3.671& 2.963& 0.000$ 2.772$ 194.6 "1649 & 498.1 " 475.7 " 482.3 " 36.57 " 1
2 14.25 & 4.052& 3.671& 2.947& 0.000$ 3.907# 161.9 "1249 " 471.8 " 456.8 " 463.5 " 41.37 " 2
3 10.55 & 4.068& 3.597& 2.931& 0.000$ 3.580# 234.7 "1238 " 487.3 " 443.9 " 444.7 " 39.51 " 3
4 8.119& 4.157& 3.549& 2.915& 0.000$ 3.261# 410.4 "1355 " 465.4 " 440.3 " 425.5 " 34.55 " 4
5 7.126& 4.169& 3.499& 2.899& 0.000$ 2.848$ 292.3 " 831.1 " 431.8 " 424.2 " 409.2 " 31.78 " 5
6 7.067& 4.167& 3.461& 2.884& 0.000$ 2.560$ 185.6 " 562.2 " 498.1 " 412.3 " 391.1 " 31.16 " 6
7 6.407& 4.142& 3.506& 2.868& 0.000$ 2.311$ 584.3 & 392.0 # 462.4 " 405.5 " 384.9 " 29.38 " 7
8 5.531& 4.157& 3.515& 2.852& 0.000$ 2.133$1564 & 360.1 # 464.5 " 400.5 " 369.1 " 26.81 # 8
9 5.082& 4.143& 3.505& 2.837& 0.000$ 2.101$ 669.5 " 247.1 # 461.6 " 400.5 " 349.9 " 23.36 # 9
10 4.768& 4.120& 3.487& 2.821& 0.000$ 2.224$ 389.8 " 431.9 # 836.9 " 418.1 " 320.4 " 21.08 # 10
11 4.613& 4.113& 3.406& 2.806& 0.000$ 2.455$ 244.6 "1103 "1233 " 434.1 " 274.3 " 19.36 # 11
12 4.376& 4.103& 3.357& 2.791& 0.000$ 5.503# 178.8 " 759.8 " 726.4 " 407.2 " 229.3 " 133.5 " 12
13 4.358& 4.137& 3.296& 2.775& 0.000$ 13.05 # 164.5 " 766.1 " 516.8 " 392.4 " 214.4 " 152.0 " 13
14 4.374& 4.050& 3.310& 2.760& 0.000$ 13.40 # 136.4 " 723.6 " 497.7 " 383.7 " 199.5 " 103.9 " 14
15 4.373& 4.004& 3.264& 2.745& 0.000$ 11.48 # 118.7 " 740.7 " 728.0 " 384.2 " 230.0 " 83.16 " 15
16 4.483& 4.002& 3.227& 2.730& 0.000$ 24.99 # 213.1 " 584.1 " 843.1 " 376.4 " 250.3 " 60.40 " 16
17 4.424& 4.014& 3.229& 2.714& 0.000$ 31.29 " 538.2 " 529.9 " 590.5 " 371.1 " 200.2 " 49.61 " 17
18 4.258& 3.961& 3.197& 2.699& 0.000$ 118.0 " 952.0 " 497.2 " 504.0 " 371.2 " 170.7 " 42.09 " 18
19 4.248& 3.943& 3.186& 2.684& 0.000$ 158.5 " 788.3 " 474.4 " 434.7 " 367.6 " 150.1 " 34.81 " 19
20 4.236& 3.903& 3.186& 2.669& 0.000$ 173.3 " 513.5 " 497.3 " 373.5 " 358.9 " 132.3 " 30.05 " 20
21 4.275& 3.870& 3.152& 2.654& 0.000$ 366.6 " 804.6 " 531.5 " 282.3 " 367.2 " 114.9 " 27.25 # 21
22 4.311& 3.863& 3.126& 2.639& 0.000$ 405.6 "1380 " 509.2 " 708.8 " 569.1 " 98.40 " 23.77 # 22
23 4.210& 3.812& 3.108& 2.625& 0.000$ 194.8 "1189 " 549.7 " 637.9 " 688.3 " 85.40 " 21.61 # 23
24 4.232& 3.803& 3.092& 2.610& 0.004$ 162.8 "1514 & 786.5 " 537.3 " 790.3 " 81.92 " 20.15 # 24
25 4.243& 3.813& 3.076& 2.595& 0.538$ 136.7 "1474 & 653.9 " 496.7 " 643.0 " 70.21 " 18.19 # 25
26 4.250& 3.799& 3.059& 2.580& 0.823$ 105.1 "1205 " 549.8 " 464.5 " 610.6 " 58.18 " 16.71 # 26
27 4.236& 3.750& 3.043& 2.577& 0.807$ 153.7 "1464 & 594.4 " 543.5 " 588.8 " 48.41 " 15.38 # 27
28 4.170& 3.741& 3.027& 2.639& 0.795$ 205.6 "1671 & 587.9 " 554.3 " 567.3 " 41.62 " 14.25 # 28
29 4.078& 3.698& 3.011& 2.612& 0.778$ 180.3 "1652 & 552.9 " 511.1 " 543.3 " 37.76 " 13.08 # 29
30 4.029& 2.995& 2.470& 0.774$ 174.2 "1688 & 531.2 " 490.8 " 524.7 " 32.66 " 11.90 # 30
31 4.029& 2.979& 1.767$ 1684 & 529.1 " 505.1 " 11.11 # 31
Mean 5.679& 3.985& 3.283& 2.743& 0.203$ 88.83 $ 782.5 & 689.3 & 558.4 " 468.5 " 225.4 " 39.29 #
Median 4.373& 4.007& 3.229& 2.737& 0.000$ 19.20 $ 584.3 & 562.2 & 498.1 " 424.2 " 207.3 " 29.38 #
Maximum 17.35 & 4.169& 3.671& 2.963& 1.767$ 405.6 $1688 &1649 &1233 " 790.3 " 482.3 " 152.0 #
Minimum 4.029& 3.698& 2.979& 2.470& 0.000$ 2.101$ 118.7 & 247.1 & 282.3 " 358.9 " 32.66 " 11.11 #
Total 176.1 & 115.6 & 101.8 & 82.29& 6.29$ 2665 $24259 &21368 &16752 "14522 " 6761 " 1218 #
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 240.5 & " ... Relative Uncertainty +/-10%
Ann. Median 28.31 & # ... Relative Uncertainty +/-15%
Annual Total 88028 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1688 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 1997
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 10.06 # 0.116$ 2.821# 0.178$ 0.000$ 93.99 " 123.8 " 214.4 " 231.0 " 171.6 " 40.34 " 24.31 # 1
2 9.122# 0.078$ 2.742$ 0.158$ 0.000$ 88.46 " 113.7 " 192.5 " 377.6 " 162.2 " 38.71 " 23.26 # 2
3 7.836# 0.056$ 2.312$ 0.103$ 0.000$ 111.4 " 107.2 " 187.8 " 366.5 " 150.1 " 36.71 " 18.65 # 3
4 6.652# 0.050$ 1.951$ 0.019$ 0.000$ 112.4 " 105.0 "1195 & 357.7 " 141.3 " 33.92 " 16.02 # 4
5 5.676# 0.034$ 1.720$ 0.002$ 0.000$ 121.5 " 103.3 "1271 & 318.8 " 133.5 " 32.63 " 13.24 # 5
6 5.129# 0.031$ 1.528$ 0.000$ 0.000$ 121.5 " 122.4 " 854.2 " 712.7 " 124.3 " 31.49 " 11.93 # 6
7 4.636# 0.024$ 1.381$ 0.000$ 0.000$ 110.1 " 159.0 " 672.5 " 623.7 " 115.6 " 28.98 " 11.52 # 7
8 4.176# 0.016$ 1.309$ 0.000$ 0.000$ 102.1 " 148.3 " 621.6 " 456.5 " 114.0 " 26.87 " 11.21 # 8
9 3.805# 0.014$ 1.237$ 0.000$ 0.000$ 184.0 " 236.6 " 788.6 " 424.4 " 134.9 " 25.47 " 10.12 # 9
10 3.396# 0.012$ 1.114$ 0.000$ 0.000$ 185.9 " 201.5 " 859.6 " 656.9 " 172.0 " 24.07 # 8.894# 10
11 3.040# 0.008$ 0.973$ 0.000$ 0.000$ 186.4 " 166.6 " 648.4 " 557.6 " 154.7 " 22.25 # 8.078# 11
12 2.674$ 0.005$ 0.889$ 0.000$ 0.000$ 179.7 " 151.3 " 516.1 " 730.5 " 127.5 " 21.24 # 7.426# 12
13 2.401$ 0.005$ 0.679$ 0.000$ 0.000$ 153.9 " 379.4 " 440.4 " 682.5 " 114.8 " 20.34 # 6.715# 13
14 2.148$ 0.004$ 0.390$ 0.000$ 0.000$ 128.8 " 609.5 " 422.8 " 506.9 " 108.0 " 20.04 # 6.068# 14
15 2.046$ 0.001$ 0.479$ 0.000$ 0.000$ 111.4 " 403.5 " 667.1 " 429.5 " 101.4 " 19.78 # 5.525# 15
16 1.832$ 0.001$ 0.681$ 0.000$ 0.000$ 100.4 " 321.8 " 578.1 " 385.7 " 97.00 " 18.49 # 5.382# 16
17 1.750$ 0.001$ 0.780$ 0.000$ 0.003$ 93.76 " 229.8 " 447.1 " 349.9 " 91.13 " 16.95 # 5.565# 17
18 1.563$ 0.001$ 0.586$ 0.000$ 1.013$ 90.29 " 194.0 " 394.2 " 314.9 " 85.09 " 14.86 # 5.587# 18
19 1.408$ 0.001$ 0.373$ 0.000$ 25.49 # 488.3 " 171.5 " 367.5 " 337.7 " 80.17 " 12.17 # 5.219# 19
20 1.414$ 0.001$ 0.341$ 0.000$ 27.15 #1011 " 155.3 " 367.9 " 370.2 " 75.81 " 14.20 # 4.858# 20
21 1.495$ 0.001$ 0.245$ 0.000$ 20.15 # 812.9 " 143.5 " 345.9 " 336.8 " 70.17 " 100.5 " 4.590# 21
22 1.593$ 0.002$ 0.189$ 0.000$ 16.21 # 470.6 " 133.4 " 310.4 " 257.1 " 64.86 " 128.3 " 4.128# 22
23 1.531$ 0.001$ 0.135$ 0.000$ 18.56 # 416.5 " 124.2 " 249.6 " 226.5 " 62.92 " 75.79 " 3.585# 23
24 1.386$ 0.169$ 0.094$ 0.000$ 31.78 " 343.4 " 205.3 " 215.2 " 240.9 " 61.71 " 53.54 " 2.975# 24
25 1.214$ 0.734$ 0.280$ 0.000$ 42.36 " 255.6 " 563.4 " 200.3 " 213.8 " 64.86 " 41.41 " 2.528$ 25
26 1.105$ 1.309$ 0.177$ 0.000$ 47.74 " 207.6 " 404.5 " 187.5 " 201.6 " 62.63 " 35.21 " 2.299$ 26
27 0.967$ 3.471# 0.077$ 0.000$ 36.80 " 180.2 " 397.8 " 218.0 " 195.3 " 58.80 " 30.78 " 2.094$ 27
28 0.824$ 2.888# 0.050$ 0.000$ 30.30 " 162.6 " 385.9 " 379.5 " 180.3 " 56.23 " 37.84 " 1.947$ 28
29 0.624$ 0.197$ 0.000$ 26.39 " 146.4 " 349.6 " 371.6 " 178.1 " 51.68 " 36.05 " 1.712$ 29
30 0.463$ 0.221$ 0.000$ 24.59 # 135.6 " 346.6 " 316.9 " 167.0 " 46.83 " 28.05 # 1.535$ 30
31 0.228$ 0.198$ 64.70 " 274.5 " 237.8 " 42.76 " 1.409$ 31
Mean 2.974$ 0.323$ 0.843$ 0.015$ 13.33 $ 230.2 " 243.0 " 475.5 & 379.6 " 99.95 " 35.56 # 7.690$
Median 1.832$ 0.013$ 0.586$ 0.000$ 0.000$ 150.1 " 194.0 " 379.5 & 353.8 " 97.00 " 29.88 # 5.565$
Maximum 10.06 $ 3.471$ 2.821$ 0.178$ 64.70 $1011 " 609.5 "1271 & 730.5 " 172.0 " 128.3 # 24.31 $
Minimum 0.228$ 0.001$ 0.050$ 0.000$ 0.000$ 88.46 " 103.3 " 187.5 & 167.0 " 42.76 " 12.17 # 1.409$
Total 92.19$ 9.03$ 26.15$ 0.46$ 413.2 $ 6907 " 7532 "14739 &11389 " 3099 " 1067 # 238.4 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 124.7 & " ... Relative Uncertainty +/-10%
Ann. Median 24.31 & # ... Relative Uncertainty +/-15%
Annual Total 45512 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1271 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 1998
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.279$ 0.003$ 0.000$ 6.413# 14.77 # 18.87 # 247.6 "1596 & 974.1 " 452.8 " 69.90 " 22.69 # 1
2 1.174$ 0.002$ 0.000$ 6.130# 14.69 # 22.92 # 204.1 " 872.5 "1287 " 463.8 " 73.57 " 25.83 " 2
3 1.051$ 0.001$ 0.000$ 5.783# 14.53 # 28.69 " 185.5 " 655.8 "1099 " 419.8 " 77.90 " 24.94 # 3
4 0.933$ 0.000$ 0.000$ 5.493# 14.39 # 33.23 " 234.7 " 526.6 " 873.7 " 368.2 " 75.52 " 23.51 # 4
5 0.824$ 0.000$ 0.000$ 5.621# 14.94 # 67.39 " 331.2 " 497.5 " 922.7 " 345.7 " 73.20 " 20.45 # 5
6 0.712$ 0.000$ 0.000$ 5.640# 14.91 # 53.83 " 341.6 " 563.9 " 892.9 " 311.0 " 74.73 " 17.89 # 6
7 0.598$ 0.000$ 0.000$ 5.609# 14.76 # 47.13 " 366.2 " 522.9 " 654.0 " 249.3 " 72.20 " 16.49 # 7
8 0.450$ 0.000$ 0.000$ 5.574# 15.34 # 348.2 " 319.4 " 510.9 " 478.3 " 214.0 " 67.99 " 14.90 # 8
9 0.331$ 0.000$ 0.000$ 5.521# 24.38 # 374.5 " 237.9 " 431.7 " 381.7 " 198.6 " 63.84 " 12.43 # 9
10 0.232$ 0.000$ 0.000$ 5.508# 38.86 " 553.7 " 201.7 " 416.5 " 368.0 " 184.9 " 59.44 " 9.580# 10
11 0.177$ 0.000$ 0.000$ 5.590# 28.21 " 639.9 " 186.9 " 543.9 " 368.9 " 176.1 " 55.26 " 7.464# 11
12 0.134$ 0.000$ 0.000$ 5.568# 23.68 # 400.2 " 171.2 " 466.4 " 346.5 " 173.3 " 51.48 " 6.061# 12
13 0.108$ 0.000$ 0.000$ 5.358# 21.46 # 347.2 " 156.5 " 403.4 " 380.3 " 168.3 " 49.21 " 5.100# 13
14 0.089$ 0.000$ 0.000$ 5.476# 20.26 # 278.4 " 145.7 " 364.0 " 336.9 " 176.1 " 54.72 " 4.427# 14
15 0.072$ 0.000$ 0.000$ 5.353# 19.38 # 192.1 " 137.1 " 330.3 " 285.1 " 163.9 " 54.75 " 4.853# 15
16 0.085$ 0.000$ 0.000$ 5.603# 18.93 # 164.9 " 130.1 " 382.8 " 243.0 " 181.0 " 47.95 " 4.514# 16
17 0.073$ 0.000$ 0.000$ 5.725# 18.64 # 350.3 " 132.7 " 389.8 " 309.1 " 207.2 " 42.07 " 3.955# 17
18 0.054$ 0.000$ 0.000$ 5.753# 20.24 # 438.4 " 194.0 " 424.2 " 324.5 " 206.1 " 42.18 " 3.259# 18
19 0.041$ 0.000$ 0.000$ 5.854# 22.67 # 376.9 " 225.7 " 448.8 " 253.9 " 177.8 " 42.13 " 2.702# 19
20 0.038$ 0.000$ 0.232$ 5.986# 21.57 # 289.1 " 203.2 " 406.4 " 217.5 " 155.9 " 39.70 " 2.282$ 20
21 0.039$ 0.000$ 8.696$ 6.433# 23.19 # 206.4 " 260.6 " 375.2 " 340.8 " 142.5 " 37.72 " 2.065$ 21
22 0.032$ 0.000$ 20.51 # 6.457# 34.53 " 175.7 " 435.6 " 347.1 " 462.7 " 134.7 " 35.13 " 1.885$ 22
23 0.029$ 0.000$ 12.69 # 6.769# 30.48 " 191.2 " 380.7 " 310.6 " 417.0 " 126.5 " 35.00 " 1.850$ 23
24 0.030$ 0.000$ 9.499# 6.916# 27.70 " 175.7 " 297.5 " 361.6 " 363.9 " 119.5 " 33.26 " 1.788$ 24
25 0.026$ 0.000$ 9.389# 6.667# 26.46 " 321.9 " 235.5 " 321.9 " 390.4 " 117.3 " 31.03 " 1.767$ 25
26 0.020$ 0.000$ 8.733# 6.661# 24.88 # 707.7 " 314.0 " 253.1 " 366.1 " 114.1 " 29.46 " 1.724$ 26
27 0.016$ 0.000$ 8.026# 10.54 # 27.85 # 659.0 " 318.5 " 445.8 " 433.8 " 106.8 " 27.15 " 1.608$ 27
28 0.011$ 0.000$ 7.299# 15.10 # 28.84 " 545.4 " 238.5 " 585.9 " 396.9 " 100.4 " 25.25 # 1.479$ 28
29 0.008$ 6.999# 15.24 # 28.36 " 406.3 " 202.3 " 897.5 " 365.3 " 96.02 " 24.04 # 1.274$ 29
30 0.006$ 6.777# 14.96 # 22.60 # 334.0 " 181.4 "1581 & 389.1 " 91.15 " 22.14 # 1.136$ 30
31 0.004$ 6.511# 19.72 # 675.9 &1036 " 83.24 " 1.165$ 31
Mean 0.280$ 0.000$ 3.399$ 6.977# 22.30 # 291.6 # 254.6 & 557.1 & 497.4 " 200.8 " 49.60 # 8.098$
Median 0.073$ 0.000$ 0.000$ 5.768# 21.57 # 305.5 # 234.7 & 445.8 & 381.0 " 176.1 " 48.58 # 4.427$
Maximum 1.279$ 0.003$ 20.51 $ 15.24 # 38.86 # 707.7 # 675.9 &1596 &1287 " 463.8 " 77.90 # 25.83 $
Minimum 0.004$ 0.000$ 0.000$ 5.353# 14.39 # 18.87 # 130.1 & 253.1 & 217.5 " 83.24 " 22.14 # 1.136$
Total 8.68$ 0.01$ 105.4 $ 209.3 # 691.2 # 8749 # 7893 &17271 &14923 " 6226 " 1488 # 251.1 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 158.4 & " ... Relative Uncertainty +/-10%
Ann. Median 28.21 & # ... Relative Uncertainty +/-15%
Annual Total 57815 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1596 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 1999
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 3.417$ 0.000$ 0.000$ 0.000$ 0.000$ 127.6 " 424.0 " 381.4 " 471.6 " 317.0 " 124.1 " 20.76 # 1
2 4.228# 0.000$ 0.000$ 0.000$ 0.000$ 153.9 " 385.6 " 355.7 " 490.5 " 223.1 " 114.9 " 25.16 # 2
3 4.185# 0.000$ 0.000$ 0.000$ 0.000$ 391.5 " 573.3 " 325.4 " 636.1 " 194.2 " 108.5 " 26.21 " 3
4 3.913# 0.000$ 0.000$ 0.000$ 0.000$ 348.6 "1264 & 270.8 " 658.9 " 178.3 " 101.3 " 21.62 # 4
5 4.725# 0.000$ 0.000$ 0.000$ 4.286$ 203.3 "1285 & 232.6 " 532.4 " 167.0 " 96.65 " 20.09 # 5
6 6.859# 0.000$ 0.000$ 0.000$ 28.35 # 169.8 " 818.6 " 410.6 " 455.1 " 174.2 " 93.90 " 19.50 # 6
7 6.173# 0.000$ 0.000$ 0.000$ 12.94 # 149.6 " 690.7 " 517.0 " 428.9 " 212.8 " 89.18 " 17.65 # 7
8 5.379# 0.000$ 0.000$ 0.000$ 7.965# 137.7 " 544.0 " 405.8 " 396.8 " 581.7 " 85.73 " 15.43 # 8
9 4.507# 0.000$ 0.000$ 0.000$ 6.877# 133.0 " 453.6 " 371.9 " 365.6 " 683.8 " 83.25 " 13.46 # 9
10 4.000# 0.000$ 0.000$ 0.000$ 10.42 # 167.9 " 469.1 " 514.3 " 345.4 " 465.2 " 79.16 " 12.42 # 10
11 3.510# 0.000$ 0.000$ 0.000$ 21.81 # 399.5 " 431.3 " 941.8 " 441.1 " 390.6 " 73.03 " 11.19 # 11
12 3.023# 0.000$ 0.000$ 0.000$ 19.11 # 495.6 " 391.4 " 859.1 " 419.2 " 361.6 " 67.89 " 10.78 # 12
13 2.629$ 0.000$ 0.000$ 0.000$ 15.98 # 404.3 " 395.8 " 642.4 " 396.9 " 350.1 " 63.92 " 12.08 # 13
14 2.272$ 0.000$ 0.000$ 0.000$ 19.18 # 806.8 " 521.9 " 503.7 " 614.0 " 677.2 " 58.87 " 15.48 # 14
15 1.960$ 0.000$ 0.000$ 0.000$ 32.37 " 645.5 " 533.0 " 440.0 " 710.4 " 595.3 " 58.25 " 14.54 # 15
16 1.633$ 0.000$ 0.000$ 0.000$ 27.02 " 632.3 " 632.7 " 408.6 " 563.2 " 585.3 " 52.87 " 10.24 # 16
17 1.375$ 0.000$ 0.000$ 0.000$ 20.85 # 490.3 " 702.9 " 394.8 " 456.9 " 495.9 " 47.50 " 8.148# 17
18 1.112$ 0.000$ 0.000$ 0.000$ 17.74 # 646.6 " 667.6 " 428.8 " 407.5 " 415.8 " 48.31 " 7.061# 18
19 0.864$ 0.000$ 0.000$ 0.000$ 26.91 # 668.5 " 634.0 " 469.6 " 374.9 " 371.6 " 47.84 " 6.149# 19
20 0.661$ 0.000$ 0.000$ 0.000$ 38.47 " 615.6 " 591.2 " 429.3 " 356.3 " 333.0 " 45.92 " 6.078# 20
21 0.513$ 0.000$ 0.000$ 0.000$ 35.53 " 435.6 " 490.2 " 393.6 " 355.5 " 268.7 " 44.72 " 6.376# 21
22 0.411$ 0.000$ 0.000$ 0.000$ 30.05 " 499.2 " 420.8 " 363.8 " 320.6 " 219.8 " 41.87 " 5.074# 22
23 0.329$ 0.000$ 0.000$ 0.000$ 25.10 #1316 " 384.8 " 338.0 " 266.6 " 202.7 " 36.82 " 4.149# 23
24 0.250$ 0.000$ 0.000$ 0.000$ 22.00 # 753.5 " 359.1 " 469.2 " 226.2 " 193.9 " 33.30 " 3.552# 24
25 0.169$ 0.000$ 0.000$ 0.000$ 20.54 # 896.9 & 362.3 " 600.0 " 208.3 " 178.9 " 31.06 " 2.736$ 25
26 0.099$ 0.000$ 0.000$ 0.000$ 25.34 #1604 & 651.0 " 604.1 " 203.6 " 174.5 " 26.71 " 2.219$ 26
27 0.051$ 0.000$ 0.000$ 0.000$ 106.4 " 893.8 " 586.4 " 482.7 " 257.3 " 164.0 " 24.73 # 1.922$ 27
28 0.020$ 0.000$ 0.000$ 0.000$ 257.9 " 706.1 " 525.4 " 574.5 " 326.1 " 155.2 " 22.14 # 1.675$ 28
29 0.003$ 0.000$ 0.000$ 332.8 " 670.0 " 543.4 " 974.3 " 236.2 " 145.5 " 20.72 # 1.478$ 29
30 0.000$ 0.000$ 0.000$ 190.8 " 507.9 " 485.3 " 728.8 " 235.4 " 139.2 " 20.18 # 1.361$ 30
31 0.000$ 0.000$ 144.0 " 420.9 " 566.8 " 133.8 " 1.192$ 31
Mean 2.202$ 0.000$ 0.000$ 0.000$ 48.41 $ 535.7 & 569.0 & 496.7 " 405.2 " 314.5 " 61.44 # 10.51 $
Median 1.633$ 0.000$ 0.000$ 0.000$ 21.81 $ 497.4 & 525.4 & 440.0 " 396.9 " 223.1 " 55.56 # 10.24 $
Maximum 6.859$ 0.000$ 0.000$ 0.000$ 332.8 $1604 &1285 & 974.3 " 710.4 " 683.8 " 124.1 # 26.21 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 127.6 & 359.1 & 232.6 " 203.6 " 133.8 " 20.18 # 1.192$
Total 68.27$ 0.00$ 0.00$ 0.00$ 1501 $16070 &17640 &15399 "12157 " 9750 " 1843 # 325.8 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 204.8 & " ... Relative Uncertainty +/-10%
Ann. Median 35.53 & # ... Relative Uncertainty +/-15%
Annual Total 74754 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1604 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2000
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.981$ 0.901$ 1.559$ 1.623$ 6.941# 71.75 " 928.6 & 486.4 " 728.0 " 135.4 " 41.77 " 13.34 # 1
2 0.810$ 0.737$ 1.005$ 1.638$ 5.984# 53.59 "1444 & 601.3 " 575.7 " 125.7 " 39.75 " 11.74 # 2
3 0.645$ 0.604$ 0.695$ 1.631$ 5.133# 38.36 " 745.7 " 636.7 " 493.6 " 118.8 " 38.99 " 9.820# 3
4 0.499$ 0.528$ 0.604$ 1.473$ 4.556# 30.77 "1049 " 493.6 " 431.7 " 113.1 " 37.72 " 9.476# 4
5 0.373$ 0.406$ 0.617$ 1.319$ 4.052# 26.54 "1013 " 460.5 " 411.7 " 134.6 " 34.20 " 8.998# 5
6 0.272$ 0.315$ 0.414$ 1.226$ 3.332# 23.26 # 668.8 " 498.3 " 907.6 " 139.8 " 30.12 " 7.490# 6
7 0.199$ 0.246$ 0.237$ 0.925$ 2.844# 20.99 # 628.1 " 617.7 " 803.6 " 130.3 " 31.19 " 6.331# 7
8 0.131$ 0.257$ 0.129$ 0.895$ 3.015# 19.54 # 512.1 " 575.8 " 565.9 " 132.8 " 44.69 " 5.573# 8
9 0.091$ 0.627$ 0.072$ 1.605$ 4.704# 18.45 # 416.4 " 476.6 " 464.3 " 130.5 " 55.95 " 4.995# 9
10 0.065$ 1.191$ 0.081$ 2.583$ 6.913# 19.65 # 429.0 " 421.0 " 417.6 " 115.1 " 60.04 " 4.461# 10
11 0.051$ 1.318$ 0.065$ 2.989# 10.06 # 26.55 # 660.3 " 386.6 " 384.0 " 106.2 " 52.69 " 3.852# 11
12 0.047$ 1.015$ 0.053$ 2.888# 20.16 # 27.19 " 512.2 " 361.3 " 365.8 " 104.4 " 38.42 " 3.496# 12
13 0.037$ 0.754$ 0.035$ 3.142# 19.28 # 79.52 " 985.1 " 375.6 " 396.1 " 100.6 " 30.57 " 3.329# 13
14 0.089$ 0.544$ 0.621$ 4.534# 14.94 # 326.1 " 882.1 " 349.8 " 366.8 " 95.40 " 26.39 " 2.939# 14
15 0.307$ 0.399$ 1.557$ 4.494# 12.71 # 203.4 " 992.7 " 343.6 " 348.9 " 90.81 " 23.57 # 2.652# 15
16 2.570$ 0.282$ 1.266$ 3.364# 11.21 # 163.5 " 843.3 " 488.9 " 330.9 " 86.60 " 22.07 # 2.387$ 16
17 7.335# 0.186$ 1.282$ 3.462# 9.972# 130.8 "1175 " 501.9 " 265.0 " 81.59 " 21.74 # 2.182$ 17
18 9.565# 0.123$ 1.522$ 3.852# 8.927# 106.0 "1326 " 421.8 " 227.4 " 76.56 " 21.57 # 1.955$ 18
19 10.79 # 0.077$ 1.387$ 3.148# 8.187# 139.0 " 914.4 " 395.9 " 214.5 " 72.11 " 19.99 # 1.792$ 19
20 9.379# 0.049$ 1.606$ 2.699# 7.582# 302.2 " 808.2 " 380.8 " 203.6 " 67.49 " 17.89 # 1.702$ 20
21 6.191# 0.199$ 2.236$ 2.422$ 7.177# 406.9 " 722.0 " 346.4 " 192.5 " 70.78 " 16.23 # 1.621$ 21
22 4.589# 0.336$ 2.275$ 2.003$ 7.782# 314.5 " 784.0 " 290.8 " 181.2 " 74.21 " 14.47 # 1.565$ 22
23 3.888# 0.616$ 1.559$ 2.784$ 9.667# 260.2 " 694.4 " 252.4 " 171.0 " 72.33 " 12.83 # 1.609$ 23
24 3.383# 0.840$ 1.166$ 3.483# 13.52 # 363.1 " 545.9 " 460.9 " 162.1 " 66.47 " 10.99 # 1.612$ 24
25 3.767# 0.559$ 1.205$ 5.153# 16.86 # 371.3 " 457.2 " 396.1 " 153.4 " 61.58 " 11.24 # 1.522$ 25
26 3.474# 0.320$ 1.365$ 8.530# 15.28 # 466.6 " 408.4 " 495.9 " 147.2 " 57.85 " 11.16 # 1.397$ 26
27 2.792$ 0.196$ 1.897$ 9.326# 13.17 # 374.6 " 378.7 " 455.3 " 162.3 " 54.83 " 11.91 # 1.203$ 27
28 2.088$ 0.736$ 2.254$ 11.59 # 11.86 # 298.4 " 523.2 " 425.9 " 163.1 " 51.56 " 16.03 # 0.990$ 28
29 1.568$ 1.591$ 2.022$ 10.13 # 10.90 # 205.6 " 531.3 " 582.3 " 148.4 " 49.10 " 17.46 # 1.038$ 29
30 1.221$ 1.628$ 8.303# 9.921# 181.7 " 423.9 " 648.3 " 142.3 " 51.17 " 15.29 # 0.988$ 30
31 1.057$ 1.590$ 22.86 # 437.4 " 819.4 " 46.26 " 0.824$ 31
Mean 2.524$ 0.550$ 1.097$ 3.774$ 9.984# 169.0 # 736.8 & 466.1 " 350.9 " 90.77 " 27.57 # 3.964$
Median 1.057$ 0.528$ 1.266$ 2.939$ 9.667# 134.9 # 694.4 & 460.5 " 339.9 " 86.60 " 22.82 # 2.387$
Maximum 10.79 $ 1.591$ 2.275$ 11.59 $ 22.86 # 466.6 #1444 & 819.4 " 907.6 " 139.8 " 60.04 # 13.34 $
Minimum 0.037$ 0.049$ 0.035$ 0.895$ 2.844# 18.45 # 378.7 & 252.4 " 142.3 " 46.26 " 10.99 # 0.824$
Total 78.25$ 15.95$ 34.00$ 113.2 $ 309.5 # 5070 #22841 &14448 "10526 " 2814 " 827.0 # 122.9 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 156.3 & " ... Relative Uncertainty +/-10%
Ann. Median 14.70 & # ... Relative Uncertainty +/-15%
Annual Total 57200 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1444 & 0.035&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2001
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.646$ 0.007$ 0.000$ 0.000$ 0.000$ 35.55 " 55.39 " 49.65 " 121.5 " 314.0 " 32.76 " 4.154# 1
2 0.516$ 0.007$ 0.000$ 0.000$ 0.000$ 30.00 " 53.74 " 46.01 " 113.7 " 209.0 " 30.40 " 3.999# 2
3 0.439$ 0.005$ 0.000$ 0.000$ 0.000$ 27.13 " 54.75 " 74.73 " 109.3 " 170.7 " 30.49 " 3.531# 3
4 0.368$ 0.003$ 0.000$ 0.000$ 0.000$ 24.58 # 62.03 " 93.21 " 99.58 " 145.3 " 35.81 " 7.270# 4
5 0.292$ 0.002$ 0.000$ 0.000$ 0.000$ 22.44 # 55.82 " 80.35 " 95.36 " 125.5 " 35.90 " 42.20 # 5
6 0.220$ 0.002$ 0.000$ 0.000$ 0.000$ 19.99 # 49.62 " 94.29 " 100.0 " 111.4 " 32.95 " 60.36 " 6
7 0.159$ 0.001$ 0.000$ 0.000$ 0.625$ 18.19 # 46.32 " 118.3 " 115.4 " 102.0 " 29.82 " 41.73 " 7
8 0.130$ 0.001$ 0.000$ 0.000$ 2.286$ 18.41 # 68.22 " 116.6 " 105.9 " 94.99 " 27.18 " 28.91 # 8
9 0.101$ 0.000$ 0.000$ 0.000$ 1.740$ 24.24 # 124.7 " 258.9 " 115.2 " 92.94 " 24.05 # 20.41 # 9
10 0.075$ 0.000$ 0.000$ 0.000$ 1.662$ 35.02 " 96.20 " 350.0 " 142.0 " 87.76 " 20.19 # 16.47 # 10
11 0.056$ 0.000$ 0.000$ 0.000$ 1.802$ 53.30 " 79.16 " 214.9 " 126.6 " 84.13 " 18.13 # 13.18 # 11
12 0.047$ 0.000$ 0.000$ 0.000$ 2.609$ 60.27 " 103.1 " 179.1 " 110.5 " 95.55 " 16.97 # 10.77 # 12
13 0.039$ 0.000$ 0.000$ 0.000$ 4.442# 51.65 " 107.8 " 174.8 " 102.0 " 89.79 " 14.90 # 9.331# 13
14 0.031$ 0.000$ 0.000$ 0.000$ 5.913# 42.45 " 91.19 " 202.9 " 93.46 " 81.68 " 12.90 # 7.268# 14
15 0.023$ 0.000$ 0.000$ 0.000$ 5.055# 36.90 " 83.73 " 176.0 " 90.23 " 75.97 " 11.59 # 5.955# 15
16 0.017$ 0.000$ 0.000$ 0.000$ 4.120# 40.93 " 75.83 " 151.9 " 90.40 " 69.84 " 11.77 # 5.135# 16
17 0.014$ 0.000$ 0.000$ 0.000$ 3.919# 48.40 " 69.38 " 133.3 " 85.21 " 65.00 " 13.82 # 4.402# 17
18 0.012$ 0.000$ 0.000$ 0.000$ 3.832# 43.43 " 63.82 " 121.0 " 80.34 " 61.46 " 16.47 # 4.097# 18
19 0.008$ 0.000$ 0.000$ 0.000$ 3.598# 37.89 " 59.70 " 115.0 " 79.48 " 57.80 " 16.12 # 4.367# 19
20 0.005$ 0.000$ 0.000$ 0.000$ 4.814# 35.11 " 57.42 " 107.7 " 74.47 " 54.25 " 14.86 # 4.259# 20
21 0.003$ 0.000$ 0.000$ 0.000$ 7.161# 32.68 " 61.59 " 99.81 " 71.29 " 57.76 " 13.41 # 3.884# 21
22 0.002$ 0.000$ 0.000$ 0.000$ 6.473# 31.00 " 59.68 " 93.24 " 108.8 " 72.67 " 11.81 # 3.415# 22
23 0.002$ 0.000$ 0.000$ 0.000$ 5.607# 46.24 " 55.15 " 90.44 " 140.0 " 67.89 " 10.30 # 3.021# 23
24 0.002$ 0.000$ 0.000$ 0.000$ 5.687# 67.48 " 50.93 " 102.9 " 132.0 " 60.96 " 8.953# 2.714# 24
25 0.003$ 0.000$ 0.000$ 0.000$ 6.078# 56.58 " 48.24 " 98.10 " 111.9 " 55.37 " 8.634# 2.529$ 25
26 0.002$ 0.000$ 0.000$ 0.000$ 7.115# 47.73 " 45.33 " 89.93 " 98.27 " 51.65 " 8.209# 2.346$ 26
27 0.001$ 0.000$ 0.000$ 0.000$ 7.614# 41.88 " 43.52 " 85.45 " 91.18 " 48.30 " 7.544# 2.140$ 27
28 0.001$ 0.000$ 0.000$ 0.000$ 7.420# 40.47 " 48.55 " 81.47 " 98.50 " 46.08 " 6.347# 1.907$ 28
29 0.000$ 0.000$ 0.000$ 16.62 # 40.75 " 54.31 " 93.77 " 221.8 " 42.95 " 5.262# 1.814$ 29
30 0.000$ 0.000$ 0.000$ 51.23 " 56.23 " 53.07 " 151.0 " 368.4 " 38.99 " 4.321# 1.657$ 30
31 0.001$ 0.000$ 50.78 " 56.29 " 140.5 " 35.45 " 1.586$ 31
Mean 0.104$ 0.001$ 0.000$ 0.000$ 7.039$ 38.90 # 65.64 " 128.6 " 116.4 " 89.26 " 17.73 # 10.48 $
Median 0.017$ 0.000$ 0.000$ 0.000$ 4.120$ 39.18 # 57.42 " 107.7 " 103.9 " 72.67 " 14.88 # 4.259$
Maximum 0.646$ 0.007$ 0.000$ 0.000$ 51.23 $ 67.48 # 124.7 " 350.0 " 368.4 " 314.0 " 35.90 # 60.36 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 18.19 # 43.52 " 46.01 " 71.29 " 35.45 " 4.321# 1.586$
Total 3.218$ 0.028$ 0.000$ 0.000$ 218.2 $1167 #2035 "3985 "3493 "2767 " 531.9 # 324.8 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 39.79 $ " ... Relative Uncertainty +/-10%
Ann. Median 11.81 $ # ... Relative Uncertainty +/-15%
Annual Total 14525 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 368.4 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2002
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.411$ 0.000$ 0.000$ 0.000$ 3.598# 20.78 # 89.04 " 180.0 " 292.1 " 90.25 " 100.9 " 10.19 # 1
2 1.188$ 0.000$ 0.000$ 0.000$ 3.414# 36.98 " 98.33 " 170.4 " 409.8 " 86.72 " 119.2 " 9.406# 2
3 0.973$ 0.000$ 0.000$ 0.000$ 5.592# 46.97 " 103.0 " 155.4 " 411.8 " 82.99 " 99.30 " 8.961# 3
4 0.810$ 0.000$ 0.000$ 0.000$ 5.068# 49.88 " 104.4 " 188.3 " 356.3 " 80.58 " 82.33 " 8.195# 4
5 0.702$ 0.000$ 0.000$ 0.000$ 5.567# 55.92 " 115.6 " 306.0 " 300.2 " 83.97 " 69.95 " 7.530# 5
6 0.571$ 0.000$ 0.000$ 0.000$ 9.058# 65.08 " 111.5 " 280.6 " 234.4 " 129.1 " 61.36 " 7.194# 6
7 0.459$ 0.000$ 0.000$ 0.000$ 18.48 # 60.25 " 179.2 " 229.0 " 205.2 " 126.2 " 55.14 " 6.960# 7
8 0.363$ 0.000$ 0.000$ 0.000$ 25.40 # 54.72 " 205.7 " 200.8 " 185.9 " 108.2 " 50.30 " 6.429# 8
9 0.291$ 0.000$ 0.000$ 0.000$ 31.01 " 49.85 " 169.1 " 278.6 " 172.1 " 94.44 " 45.46 " 5.752# 9
10 0.246$ 0.000$ 0.000$ 0.000$ 27.11 " 45.32 " 156.9 " 491.2 " 160.0 " 84.59 " 41.55 " 4.954# 10
11 0.197$ 0.000$ 0.000$ 0.000$ 72.56 " 43.29 " 179.5 " 526.4 " 149.5 " 79.26 " 39.70 " 4.335# 11
12 0.142$ 0.000$ 0.000$ 0.000$ 107.9 " 42.60 " 227.0 " 397.8 " 140.3 " 75.15 " 38.00 " 3.618# 12
13 0.100$ 0.000$ 0.000$ 0.000$ 98.19 " 75.64 " 292.0 " 338.5 " 132.3 " 71.32 " 34.61 " 3.154# 13
14 0.067$ 0.000$ 0.000$ 0.000$ 81.48 " 124.1 " 228.8 " 269.1 " 143.1 " 69.14 " 31.95 " 2.874# 14
15 0.045$ 0.000$ 0.000$ 0.000$ 74.70 " 125.7 " 214.4 " 698.2 " 237.7 " 66.38 " 29.89 " 2.762# 15
16 0.034$ 0.000$ 0.000$ 0.000$ 65.26 " 105.1 " 185.1 " 610.6 " 211.9 " 63.60 " 27.48 " 2.588# 16
17 0.051$ 0.000$ 0.000$ 0.000$ 55.47 " 88.57 " 157.5 " 428.3 " 178.6 " 77.32 " 25.57 " 2.402$ 17
18 0.039$ 0.000$ 0.000$ 0.080$ 47.29 " 83.28 " 207.9 " 367.4 " 159.0 " 120.7 " 25.20 " 2.280$ 18
19 0.025$ 0.000$ 0.000$ 0.401$ 40.48 " 93.36 " 363.4 " 311.0 " 145.8 " 111.7 " 23.24 # 2.083$ 19
20 0.014$ 0.000$ 0.000$ 0.245$ 35.72 " 88.88 " 268.8 " 235.8 " 148.5 " 95.10 " 21.29 # 1.876$ 20
21 0.007$ 0.000$ 0.000$ 0.112$ 33.24 " 80.18 " 230.3 " 208.5 " 141.4 " 81.00 " 19.40 # 1.640$ 21
22 0.003$ 0.000$ 0.000$ 6.562$ 32.42 " 73.45 " 361.6 " 189.8 " 135.5 " 72.49 " 18.35 # 1.496$ 22
23 0.001$ 0.000$ 0.000$ 27.77 # 30.51 " 67.48 " 289.5 " 171.1 " 131.9 " 66.79 " 17.84 # 1.358$ 23
24 0.000$ 0.000$ 0.000$ 12.02 # 31.83 " 64.21 " 226.7 " 158.7 " 124.7 " 62.65 " 17.14 # 1.246$ 24
25 0.000$ 0.000$ 0.000$ 7.420# 30.37 " 61.75 " 233.4 " 168.6 " 118.0 " 59.04 " 16.87 # 1.067$ 25
26 0.000$ 0.000$ 0.000$ 6.059# 27.71 " 64.25 " 213.1 " 193.1 " 120.1 " 55.60 " 15.92 # 0.879$ 26
27 0.000$ 0.000$ 0.000$ 5.387# 25.63 " 64.23 " 219.4 " 287.7 " 119.1 " 55.30 " 14.83 # 0.708$ 27
28 0.000$ 0.000$ 0.000$ 4.464# 23.80 # 58.62 " 196.5 " 217.9 " 110.0 " 85.64 " 13.71 # 0.570$ 28
29 0.000$ 0.000$ 3.872# 22.17 # 71.38 " 171.7 " 194.6 " 102.1 " 92.59 " 12.37 # 0.556$ 29
30 0.000$ 0.000$ 3.755# 20.88 # 81.38 " 180.7 " 192.4 " 94.92 " 79.86 " 11.33 # 0.513$ 30
31 0.000$ 0.000$ 20.25 # 198.2 " 216.9 " 68.40 " 0.431$ 31
Mean 0.250$ 0.000$ 0.000$ 2.605$ 35.88 # 68.11 # 199.3 " 285.9 " 185.7 " 83.10 " 39.34 # 3.677$
Median 0.045$ 0.000$ 0.000$ 0.000$ 30.37 # 64.24 # 198.2 " 229.0 " 149.0 " 80.58 " 28.69 # 2.588$
Maximum 1.411$ 0.000$ 0.000$ 27.77 $ 107.9 # 125.7 # 363.4 " 698.2 " 411.8 " 129.1 " 119.2 # 10.19 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 3.414# 20.78 # 89.04 " 155.4 " 94.92 " 55.30 " 11.33 # 0.431$
Total 7.740$ 0.000$ 0.000$ 78.16 $1112 #2043 #6179 "8863 "5572 "2576 "1180 # 114.0 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 75.96 $ " ... Relative Uncertainty +/-10%
Ann. Median 29.89 $ # ... Relative Uncertainty +/-15%
Annual Total 27725 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 698.2 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2003
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.359$ 0.000$ 0.000$ 0.000$ 0.000$ 10.61 #1144 & 343.0 " 140.5 " 253.5 " 75.39 " 17.64 # 1
2 0.297$ 0.000$ 0.000$ 0.000$ 0.000$ 13.65 # 532.2 " 277.5 " 134.6 " 208.4 " 70.01 " 16.59 # 2
3 0.243$ 0.000$ 0.000$ 0.000$ 0.000$ 16.71 # 437.2 " 373.6 " 130.6 " 187.5 " 65.15 " 14.83 # 3
4 0.192$ 0.000$ 0.000$ 0.000$ 0.000$ 22.06 # 620.9 " 443.3 " 156.3 " 172.1 " 62.09 " 12.71 # 4
5 0.149$ 0.000$ 0.000$ 0.000$ 0.000$ 20.19 # 540.3 " 412.3 " 155.1 " 157.7 " 58.55 " 11.29 # 5
6 0.114$ 0.000$ 0.000$ 0.000$ 0.000$ 19.30 # 590.5 " 377.9 " 150.6 " 146.8 " 54.08 " 10.11 # 6
7 0.082$ 0.000$ 0.000$ 0.000$ 0.000$ 18.67 # 482.9 " 331.9 " 145.3 " 138.4 " 49.96 " 9.214# 7
8 0.058$ 0.000$ 0.000$ 0.000$ 0.000$ 17.61 # 395.9 " 258.4 " 174.9 " 131.0 " 46.22 " 8.271# 8
9 0.042$ 0.000$ 0.000$ 0.000$ 0.000$ 16.52 # 366.8 " 213.2 " 202.7 " 124.2 " 42.58 " 7.342# 9
10 0.032$ 0.000$ 0.000$ 0.000$ 0.000$ 16.97 # 363.2 " 208.8 " 246.4 " 116.1 " 39.56 " 6.664# 10
11 0.025$ 0.000$ 0.000$ 0.000$ 0.000$ 19.19 # 443.3 " 424.4 " 326.3 " 109.0 " 36.39 " 6.275# 11
12 0.022$ 0.000$ 0.000$ 0.000$ 0.000$ 22.86 # 387.6 " 398.4 " 350.8 " 110.2 " 33.36 " 5.838# 12
13 0.014$ 0.000$ 0.000$ 0.000$ 0.000$ 21.81 # 365.9 " 325.8 " 345.0 " 171.7 " 30.57 " 5.327# 13
14 0.009$ 0.000$ 0.000$ 0.000$ 0.000$ 19.57 # 417.7 " 262.6 " 276.2 " 171.1 " 29.18 " 4.841# 14
15 0.006$ 0.000$ 0.000$ 0.000$ 0.000$ 17.81 # 398.5 " 221.6 " 215.1 " 152.1 " 27.65 " 4.426# 15
16 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 16.42 # 351.1 " 313.0 " 190.9 " 134.7 " 26.15 " 3.999# 16
17 0.002$ 0.000$ 0.000$ 0.000$ 0.476$ 15.41 # 272.2 " 311.1 " 174.8 " 125.3 " 25.72 " 3.799# 17
18 0.001$ 0.000$ 0.000$ 0.000$ 7.743# 14.42 # 211.8 " 239.9 " 160.7 " 119.3 " 38.24 " 4.591# 18
19 0.001$ 0.000$ 0.000$ 0.000$ 6.319# 13.62 # 188.2 " 209.8 " 158.9 " 111.6 " 59.11 " 4.406# 19
20 0.000$ 0.000$ 0.000$ 0.000$ 5.404# 13.13 # 198.4 " 217.3 " 223.8 " 106.9 " 58.02 " 4.305# 20
21 0.000$ 0.000$ 0.000$ 0.000$ 9.076# 12.89 # 206.8 " 256.0 " 339.0 " 105.9 " 48.38 " 3.751# 21
22 0.000$ 0.000$ 0.000$ 0.000$ 11.70 # 17.00 # 210.4 " 482.3 " 657.5 " 101.5 " 37.47 " 3.232# 22
23 0.000$ 0.000$ 0.000$ 0.000$ 12.19 # 52.16 " 186.2 " 421.5 " 599.1 " 96.17 " 30.84 " 2.765# 23
24 0.000$ 0.000$ 0.000$ 0.000$ 10.61 # 57.34 " 168.9 " 341.5 " 501.7 " 92.42 " 27.55 " 2.482$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 8.951# 126.0 " 165.3 " 278.5 " 435.2 " 87.45 " 27.46 " 2.153$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 7.784# 143.7 " 191.7 " 215.9 " 382.8 " 81.77 " 27.33 " 1.872$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 7.018# 176.1 " 185.3 " 193.8 " 335.4 " 92.02 " 24.57 # 1.616$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 6.371# 233.8 " 167.1 " 180.2 " 264.6 " 103.0 " 21.81 # 1.386$ 28
29 0.000$ 0.000$ 0.000$ 5.818# 318.1 " 152.7 " 180.7 " 220.1 " 94.04 " 19.86 # 1.183$ 29
30 0.000$ 0.000$ 0.000$ 6.418#1258 & 287.3 " 167.1 " 245.4 " 86.53 " 18.47 # 1.019$ 30
31 0.000$ 0.000$ 8.614# 399.4 " 150.9 " 80.78 " 0.884$ 31
Mean 0.053$ 0.000$ 0.000$ 0.000$ 3.693$ 91.40 & 355.8 & 291.4 " 268.0 " 128.0 " 40.39 # 5.962$
Median 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 18.93 & 363.2 & 277.5 " 222.0 " 116.1 " 36.93 # 4.426$
Maximum 0.359$ 0.000$ 0.000$ 0.000$ 12.19 $1258 &1144 & 482.3 " 657.5 " 253.5 " 75.39 # 17.64 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 10.61 & 152.7 & 150.9 " 130.6 " 80.78 " 18.47 # 0.884$
Total 1.65$ 0.00$ 0.00$ 0.00$ 114.5 $ 2742 &11030 & 9032 " 8040 " 3969 " 1212 # 184.8 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 99.52 & " ... Relative Uncertainty +/-10%
Ann. Median 13.62 & # ... Relative Uncertainty +/-15%
Annual Total 36326 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1258 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2004
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.783$ 0.000$ 0.000$ 0.000$ 0.000$ 20.82 # 164.1 " 317.0 " 347.4 " 97.14 " 30.66 " 11.96 # 1
2 0.730$ 0.000$ 0.000$ 0.000$ 0.000$ 16.00 # 235.0 " 326.8 " 301.5 " 92.84 " 30.38 " 10.60 # 2
3 0.606$ 0.000$ 0.000$ 0.000$ 0.000$ 14.26 # 299.9 " 271.5 " 240.2 " 88.17 " 37.45 " 9.727# 3
4 0.458$ 0.000$ 0.000$ 0.000$ 0.000$ 17.03 # 228.9 " 259.2 " 210.2 " 86.55 " 46.01 " 8.798# 4
5 0.366$ 0.000$ 0.000$ 0.000$ 0.000$ 37.73 # 198.7 " 317.9 " 214.3 " 82.84 " 38.30 " 8.477# 5
6 0.292$ 0.000$ 0.000$ 0.000$ 0.000$ 71.40 " 193.0 " 398.0 " 216.0 " 84.50 " 32.65 " 8.401# 6
7 0.222$ 0.000$ 0.000$ 0.000$ 0.000$ 81.32 " 235.3 " 351.8 " 212.4 " 93.56 " 29.68 " 8.198# 7
8 0.157$ 0.000$ 0.000$ 0.000$ 0.000$ 85.03 " 360.5 " 281.4 " 198.2 " 86.07 " 27.42 " 7.529# 8
9 0.111$ 0.000$ 0.000$ 0.000$ 0.000$ 86.60 " 356.7 " 218.7 " 191.9 " 81.13 " 27.34 " 6.428# 9
10 0.076$ 0.000$ 0.000$ 0.000$ 0.000$ 113.2 " 272.9 " 194.3 " 183.8 " 82.10 " 30.54 " 5.225# 10
11 0.049$ 0.000$ 0.000$ 0.000$ 0.000$ 184.2 " 205.3 " 201.3 " 169.2 " 78.68 " 34.80 " 4.456# 11
12 0.028$ 0.000$ 0.000$ 0.000$ 0.000$ 205.9 " 186.1 " 365.8 " 158.4 " 94.44 " 36.57 " 4.023# 12
13 0.014$ 0.000$ 0.000$ 0.000$ 0.000$ 221.9 " 171.9 " 347.5 " 148.9 " 97.32 " 32.70 " 3.631# 13
14 0.007$ 0.000$ 0.000$ 0.000$ 0.000$ 166.7 " 154.4 " 372.9 " 141.2 " 87.27 " 28.54 " 3.245# 14
15 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 134.6 " 141.2 " 380.8 " 136.0 " 79.37 " 25.76 # 2.879# 15
16 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 175.5 " 137.6 " 341.2 " 130.7 " 82.25 " 23.08 # 2.713# 16
17 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 486.9 " 127.9 " 325.8 " 124.0 " 80.80 " 25.26 # 2.700# 17
18 0.000$ 0.000$ 0.000$ 0.000$ 2.378$ 335.5 " 116.9 " 341.7 " 119.4 " 72.75 " 28.11 " 2.726# 18
19 0.000$ 0.000$ 0.000$ 0.000$ 4.567# 204.6 " 109.1 " 284.7 " 164.2 " 66.69 " 24.88 # 2.525# 19
20 0.000$ 0.000$ 0.000$ 0.000$ 4.249# 163.1 " 103.5 " 233.2 " 170.5 " 61.52 " 21.73 # 2.213$ 20
21 0.000$ 0.000$ 0.000$ 0.000$ 14.79 # 138.9 " 150.8 " 337.2 " 152.2 " 58.32 " 18.84 # 1.518$ 21
22 0.000$ 0.000$ 0.000$ 0.000$ 53.52 " 173.0 " 291.0 " 339.4 " 139.6 " 57.54 " 16.15 # 1.294$ 22
23 0.000$ 0.000$ 0.000$ 0.000$ 30.19 " 190.9 " 213.7 " 423.5 " 126.6 " 55.01 " 13.53 # 1.112$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 21.76 # 174.2 " 181.4 " 608.2 " 118.3 " 51.49 " 11.53 # 0.929$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 17.46 # 153.1 " 173.8 " 654.1 " 112.4 " 47.81 " 11.06 # 0.792$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 15.01 # 134.6 " 158.8 " 649.1 " 112.1 " 41.69 " 12.66 # 0.652$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 13.86 # 176.4 " 148.6 " 680.9 " 106.1 " 37.39 " 16.05 # 0.476$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 13.33 # 286.1 " 143.0 " 636.3 " 101.7 " 34.36 " 17.06 # 0.305$ 28
29 0.000$ 0.000$ 0.000$ 0.000$ 12.80 # 220.2 " 151.1 " 498.9 " 97.15 " 32.93 " 15.59 # 0.189$ 29
30 0.000$ 0.000$ 0.000$ 12.44 # 181.9 " 362.9 " 416.9 " 94.01 " 31.07 " 13.40 # 0.125$ 30
31 0.000$ 0.000$ 16.20 # 355.1 " 377.1 " 29.97 " 0.078$ 31
Mean 0.126$ 0.000$ 0.000$ 0.000$ 7.501$ 155.1 # 204.2 " 379.1 " 164.6 " 69.47 " 25.26 # 3.998$
Median 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 164.9 # 181.4 " 341.7 " 150.5 " 79.37 " 26.55 # 2.726$
Maximum 0.783$ 0.000$ 0.000$ 0.000$ 53.52 $ 486.9 # 362.9 " 680.9 " 347.4 " 97.32 " 46.01 # 11.96 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 14.26 # 103.5 " 194.3 " 94.01 " 29.97 " 11.06 # 0.078$
Total 3.90$ 0.00$ 0.00$ 0.00$ 232.5 $ 4652 # 6329 "11753 " 4938 " 2154 " 757.7 # 123.9 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 84.55 $ " ... Relative Uncertainty +/-10%
Ann. Median 14.90 $ # ... Relative Uncertainty +/-15%
Annual Total 30944 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 680.9 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2005
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.049$ 0.000$ 0.000$ 0.000$ 1.739$ 45.14 " 251.0 " 133.8 " 150.8 " 185.0 " 144.3 " 36.88 " 1
2 0.031$ 0.000$ 0.000$ 0.000$ 1.999$ 41.86 " 195.7 " 233.2 " 158.1 " 182.8 " 135.9 " 32.61 " 2
3 0.019$ 0.000$ 0.000$ 0.000$ 2.798$ 43.48 " 178.7 " 291.7 " 170.4 " 166.8 " 123.5 " 30.27 " 3
4 0.010$ 0.000$ 0.000$ 0.000$ 3.300# 61.06 " 209.0 " 218.7 " 157.9 " 190.8 " 117.7 " 29.12 " 4
5 0.005$ 0.000$ 0.000$ 0.000$ 3.926# 55.14 " 212.6 " 195.2 " 163.8 " 209.3 " 123.2 " 28.00 " 5
6 0.002$ 0.000$ 0.000$ 0.000$ 4.812# 51.84 " 200.2 " 178.6 " 431.3 " 403.8 " 123.5 " 28.17 " 6
7 0.001$ 0.000$ 0.000$ 0.000$ 4.364# 94.24 " 176.7 " 170.3 " 428.1 " 487.7 " 113.6 " 28.87 " 7
8 0.000$ 0.000$ 0.000$ 0.000$ 3.317# 108.0 " 161.2 " 158.6 " 401.2 " 382.6 " 113.8 " 30.47 " 8
9 0.000$ 0.000$ 0.000$ 0.000$ 2.950# 127.8 " 149.7 " 148.8 " 386.2 " 338.0 " 109.4 " 30.34 " 9
10 0.000$ 0.000$ 0.000$ 0.000$ 2.795# 262.3 " 139.0 " 146.4 " 359.9 " 279.7 " 101.0 " 28.96 " 10
11 0.000$ 0.000$ 0.000$ 0.000$ 2.570# 358.0 " 129.5 " 146.3 " 301.3 " 219.5 " 94.40 " 30.44 " 11
12 0.000$ 0.000$ 0.000$ 0.000$ 15.80 $ 386.5 " 121.8 " 142.1 " 320.7 " 208.4 " 88.86 " 31.97 " 12
13 0.000$ 0.000$ 0.000$ 0.000$ 16.38 # 484.5 " 155.4 " 240.8 " 312.1 " 195.2 " 83.07 " 30.35 " 13
14 0.000$ 0.000$ 0.000$ 0.000$ 12.08 # 395.1 " 270.3 " 335.7 " 318.2 " 177.7 " 78.38 " 28.64 " 14
15 0.000$ 0.000$ 0.000$ 0.000$ 12.30 # 386.6 " 254.7 " 328.1 " 246.6 " 164.4 " 73.79 " 26.00 " 15
16 0.000$ 0.000$ 0.000$ 0.000$ 144.9 # 335.4 " 239.6 " 323.5 " 207.8 " 153.7 " 69.28 " 23.00 # 16
17 0.000$ 0.000$ 0.000$ 0.000$ 124.0 " 304.2 " 196.7 " 684.8 " 248.2 " 157.5 " 65.30 " 22.12 # 17
18 0.000$ 0.000$ 0.000$ 0.000$ 159.3 " 253.1 " 179.6 " 864.0 " 303.7 " 163.8 " 61.02 " 21.33 # 18
19 0.000$ 0.000$ 0.000$ 0.000$ 389.1 " 252.6 " 174.4 " 672.8 " 225.4 " 149.0 " 58.10 " 19.74 # 19
20 0.000$ 0.000$ 0.000$ 0.000$ 263.5 " 223.0 " 167.8 " 464.5 " 204.4 " 137.9 " 55.37 " 17.38 # 20
21 0.000$ 0.000$ 0.000$ 0.000$ 181.0 " 190.7 " 385.8 " 404.3 " 207.3 " 138.7 " 51.40 " 15.40 # 21
22 0.000$ 0.000$ 0.000$ 0.000$ 141.5 " 167.9 " 406.2 " 361.8 " 192.1 " 169.3 " 46.69 " 13.80 # 22
23 0.000$ 0.000$ 0.000$ 0.000$ 114.8 " 254.5 " 348.9 " 309.6 " 180.8 " 150.1 " 42.67 " 14.18 # 23
24 0.000$ 0.000$ 0.000$ 0.064$ 96.16 " 563.8 " 269.9 " 245.5 " 166.6 " 137.4 " 39.95 " 13.24 # 24
25 0.000$ 0.000$ 0.000$ 1.991$ 82.14 " 446.5 " 224.3 " 211.9 " 154.5 " 154.7 " 37.51 " 12.61 # 25
26 0.000$ 0.000$ 0.000$ 2.251$ 72.53 " 340.3 " 202.8 " 195.1 " 147.5 " 155.3 " 33.23 " 11.72 # 26
27 0.000$ 0.000$ 0.000$ 2.116$ 66.14 " 235.0 " 183.7 " 182.4 " 154.6 " 140.1 " 34.30 " 10.66 # 27
28 0.000$ 0.000$ 0.000$ 2.032$ 61.58 " 192.6 " 168.4 " 183.4 " 161.0 " 134.6 " 42.19 " 10.36 # 28
29 0.000$ 0.000$ 1.936$ 57.18 " 206.2 " 155.5 " 180.3 " 157.4 " 123.7 " 43.69 " 9.524# 29
30 0.000$ 0.000$ 1.836$ 52.98 " 332.1 " 146.0 " 171.8 " 161.8 " 130.6 " 41.92 " 9.375# 30
31 0.000$ 0.000$ 48.99 " 137.8 " 161.0 " 156.3 " 8.477# 31
Mean 0.004$ 0.000$ 0.000$ 0.407$ 69.26 $ 240.0 " 206.2 " 280.2 " 239.3 " 198.2 " 78.23 " 22.07 #
Median 0.000$ 0.000$ 0.000$ 0.000$ 48.99 $ 243.8 " 183.7 " 211.9 " 205.8 " 164.4 " 71.53 " 23.00 #
Maximum 0.049$ 0.000$ 0.000$ 2.251$ 389.1 $ 563.8 " 406.2 " 864.0 " 431.3 " 487.7 " 144.3 " 36.88 #
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 1.739$ 41.86 " 121.8 " 133.8 " 147.5 " 123.7 " 33.23 " 8.477#
Total 0.117$ 0.000$ 0.000$ 12.22 $2147 $7199 "6393 "8685 "7180 "6144 "2347 " 684.0 #
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 111.8 $ " ... Relative Uncertainty +/-10%
Ann. Median 55.14 $ # ... Relative Uncertainty +/-15%
Annual Total 40792 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 864.0 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2006
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 7.688# 1.778$ 0.000$ 0.000$ 3.920# 3.092# 19.98 # 172.1 " 198.0 " 66.20 " 19.61 # 31.46 " 1
2 6.863# 1.608$ 0.000$ 0.000$ 4.093# 2.850# 21.16 # 163.7 " 172.2 " 62.48 " 18.76 # 22.21 # 2
3 6.357# 1.485$ 0.000$ 0.000$ 3.483# 2.739# 23.87 # 141.7 " 151.4 " 68.05 " 18.82 # 17.08 # 3
4 6.851# 1.336$ 0.000$ 0.000$ 2.436$ 2.550# 27.22 " 123.3 " 145.6 " 99.94 " 18.32 # 13.80 # 4
5 6.762# 1.139$ 0.000$ 0.000$ 2.112$ 2.392$ 24.84 # 110.4 " 145.3 " 92.23 " 16.84 # 11.53 # 5
6 6.391# 0.941$ 0.000$ 0.000$ 2.300$ 2.364$ 21.19 # 105.2 " 133.0 " 79.52 " 16.09 # 9.630# 6
7 5.578# 0.731$ 0.000$ 0.000$ 2.580# 2.492# 18.91 # 199.9 " 119.1 " 70.16 " 16.72 # 7.746# 7
8 4.791# 0.559$ 0.000$ 0.000$ 2.462$ 2.427$ 17.73 # 235.3 " 108.1 " 62.19 " 19.91 # 7.225# 8
9 4.292# 0.412$ 0.000$ 0.000$ 2.187$ 2.266$ 18.52 # 220.8 " 100.7 " 56.22 " 21.61 # 6.666# 9
10 3.641# 0.298$ 0.000$ 0.000$ 2.014$ 2.175$ 23.13 # 177.9 " 96.31 " 51.29 " 22.11 # 6.098# 10
11 3.072# 0.219$ 0.000$ 0.000$ 1.858$ 2.168$ 38.61 " 150.4 " 117.5 " 59.17 " 24.75 # 5.312# 11
12 2.701# 0.155$ 0.000$ 0.000$ 1.594$ 2.239$ 35.55 " 180.8 " 159.0 " 88.13 " 27.68 " 4.808# 12
13 2.410$ 0.099$ 0.000$ 0.000$ 1.380$ 9.148# 29.39 " 172.3 " 155.5 " 73.28 " 24.71 # 4.148# 13
14 2.263$ 0.065$ 0.000$ 0.000$ 1.263$ 24.64 # 32.14 " 146.3 " 131.8 " 63.94 " 20.01 # 3.775# 14
15 2.154$ 0.053$ 0.000$ 0.000$ 1.426$ 15.63 # 35.99 " 144.5 " 116.3 " 57.56 " 16.11 # 3.381# 15
16 2.037$ 0.048$ 0.000$ 0.000$ 1.535$ 11.38 # 31.82 " 160.7 " 105.2 " 53.29 " 13.45 # 2.955# 16
17 1.900$ 0.034$ 0.000$ 0.000$ 1.558$ 9.275# 28.12 " 145.0 " 99.96 " 48.76 " 12.79 # 2.596# 17
18 1.839$ 0.023$ 0.000$ 0.000$ 1.545$ 8.330# 25.41 " 136.3 " 122.4 " 45.31 " 13.12 # 2.280$ 18
19 1.739$ 0.014$ 0.000$ 0.000$ 1.481$ 10.02 # 23.38 # 168.5 " 129.1 " 43.39 " 12.71 # 2.089$ 19
20 1.601$ 0.009$ 0.000$ 0.000$ 1.405$ 17.81 # 29.66 # 221.2 " 115.6 " 38.68 " 11.86 # 1.959$ 20
21 1.452$ 0.006$ 0.000$ 0.000$ 1.398$ 16.71 # 90.08 " 168.2 " 109.5 " 43.27 " 10.94 # 2.026$ 21
22 1.286$ 0.004$ 0.000$ 0.000$ 1.389$ 13.30 # 80.40 " 463.4 " 111.1 " 56.06 " 10.31 # 1.942$ 22
23 1.056$ 0.002$ 0.000$ 0.000$ 1.539$ 11.59 # 65.09 " 539.2 " 99.83 " 47.24 " 9.700# 1.774$ 23
24 1.002$ 0.001$ 0.000$ 0.000$ 2.346$ 10.16 # 85.25 " 389.2 " 91.84 " 40.21 " 9.162# 1.569$ 24
25 1.762$ 0.000$ 0.000$ 0.000$ 2.674$ 9.209# 182.2 " 309.4 " 86.65 " 35.38 " 8.836# 1.292$ 25
26 3.275# 0.000$ 0.000$ 0.000$ 2.551$ 8.741# 157.9 " 225.5 " 85.59 " 31.52 " 7.407# 1.033$ 26
27 4.086# 0.000$ 0.000$ 0.000$ 2.234$ 11.46 # 146.8 " 189.2 " 80.40 " 28.82 " 6.585# 0.817$ 27
28 3.289# 0.000$ 0.000$ 1.447$ 2.209$ 24.62 # 166.8 " 168.5 " 75.77 " 26.24 " 6.251# 0.611$ 28
29 2.710# 0.000$ 3.939# 2.573# 22.87 # 154.0 " 150.4 " 71.76 " 24.20 # 20.74 # 0.463$ 29
30 2.287$ 0.000$ 4.015# 2.727# 19.19 # 150.9 " 136.1 " 69.05 " 22.23 # 51.45 " 0.372$ 30
31 1.990$ 0.000$ 2.964# 145.8 " 195.4 " 20.48 # 0.310$ 31
Mean 3.391$ 0.394$ 0.000$ 0.313$ 2.169$ 9.461$ 62.96 # 200.3 " 116.8 " 53.40 # 16.91 # 5.773$
Median 2.701$ 0.059$ 0.000$ 0.000$ 2.187$ 9.179$ 31.82 # 168.5 " 113.3 " 53.29 # 16.41 # 2.955$
Maximum 7.688$ 1.778$ 0.000$ 4.015$ 4.093$ 24.64 $ 182.2 # 539.2 " 198.0 " 99.94 # 51.45 # 31.46 $
Minimum 1.002$ 0.000$ 0.000$ 0.000$ 1.263$ 2.168$ 17.73 # 105.2 " 69.05 " 20.48 # 6.251# 0.310$
Total 105.1 $ 11.02 $ 0.000$ 9.402$ 67.24 $ 283.8 $1952 #6211 "3503 "1655 # 507.3 # 179.0 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 39.68 $ " ... Relative Uncertainty +/-10%
Ann. Median 6.585$ # ... Relative Uncertainty +/-15%
Annual Total 14484 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 539.2 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2007
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.249$ 0.000$ 0.000$ 0.000$ 1.849$ 7.381# 46.87 " 688.4 " 303.5 " 204.7 " 72.01 " 9.895# 1
2 0.341$ 0.000$ 0.000$ 0.000$ 3.510# 6.932# 74.17 " 673.5 " 303.0 " 182.4 " 66.42 " 12.38 # 2
3 1.652$ 0.000$ 0.000$ 0.000$ 4.543# 6.611# 117.6 " 425.0 " 220.3 " 166.9 " 60.69 " 13.14 # 3
4 2.645$ 0.000$ 0.000$ 0.000$ 4.113# 6.261# 119.7 " 329.1 " 198.5 " 155.2 " 55.65 " 13.69 # 4
5 4.098# 0.000$ 0.000$ 0.000$ 4.210# 6.307# 102.1 " 236.5 " 211.3 " 143.8 " 50.93 " 14.10 # 5
6 4.187# 0.000$ 0.000$ 0.000$ 4.847# 6.146# 95.51 " 275.8 " 194.9 " 135.1 " 45.31 " 15.20 # 6
7 3.050$ 0.000$ 0.000$ 0.000$ 4.617# 6.084# 85.19 " 409.9 " 187.2 " 127.2 " 42.49 " 16.12 # 7
8 2.014$ 0.000$ 0.000$ 0.000$ 3.739# 6.582# 78.93 " 350.6 " 353.3 " 128.3 " 40.38 " 14.31 # 8
9 1.524$ 0.000$ 0.000$ 0.000$ 3.570# 6.714# 78.54 " 242.2 " 387.3 " 158.2 " 38.80 " 12.15 # 9
10 1.340$ 0.000$ 0.000$ 0.000$ 3.672# 6.213# 69.78 " 273.4 " 333.6 " 153.7 " 36.42 " 10.29 # 10
11 1.101$ 0.000$ 0.000$ 0.000$ 3.174# 5.225# 62.12 " 402.5 " 271.4 " 154.2 " 34.37 " 9.730# 11
12 0.948$ 0.000$ 0.000$ 0.000$ 3.300# 4.681# 56.03 " 359.5 " 330.2 " 134.3 " 31.99 " 7.677# 12
13 0.812$ 0.000$ 0.000$ 0.000$ 3.317# 5.962# 52.72 " 268.7 " 407.4 " 119.7 " 30.67 " 6.699# 13
14 0.650$ 0.000$ 0.000$ 0.000$ 3.257# 17.35 # 48.91 " 216.3 " 387.1 " 110.0 " 27.54 " 6.159# 14
15 0.510$ 0.000$ 0.000$ 0.000$ 3.234# 15.17 # 44.63 " 197.5 " 577.8 " 103.6 " 25.11 # 5.502# 15
16 0.341$ 0.000$ 0.000$ 0.000$ 3.089# 11.01 # 41.27 " 176.1 " 467.1 " 96.45 " 22.56 # 5.215# 16
17 0.234$ 0.000$ 0.000$ 0.000$ 3.182# 9.239# 39.26 " 158.1 " 397.9 " 97.12 " 20.34 # 7.045# 17
18 0.159$ 0.000$ 0.000$ 0.000$ 3.684# 8.066# 37.21 " 144.6 " 392.3 " 118.9 " 19.31 # 9.114# 18
19 0.107$ 0.000$ 0.000$ 0.000$ 3.878# 7.219# 43.99 " 148.1 " 375.1 " 106.7 " 18.55 # 9.690# 19
20 0.067$ 0.000$ 0.000$ 0.000$ 3.954# 6.810# 105.6 " 491.0 " 336.7 " 98.09 " 17.17 # 9.668# 20
21 0.043$ 0.000$ 0.000$ 0.000$ 3.681# 6.496# 107.2 " 460.9 " 302.4 " 105.5 " 15.49 # 8.693# 21
22 0.025$ 0.000$ 0.000$ 0.000$ 4.106# 7.749# 124.4 " 331.2 " 341.3 " 103.6 " 14.32 # 7.375# 22
23 0.013$ 0.000$ 0.000$ 0.000$ 4.846# 19.89 # 145.3 " 345.2 " 321.2 " 91.55 " 13.12 # 6.312# 23
24 0.006$ 0.000$ 0.000$ 0.000$ 4.996# 24.89 " 303.7 " 320.5 " 339.4 " 83.89 " 12.27 # 5.332# 24
25 0.003$ 0.000$ 0.000$ 0.000$ 4.989# 29.58 " 358.1 " 260.3 " 424.0 " 77.25 " 11.48 # 4.393# 25
26 0.001$ 0.000$ 0.000$ 0.000$ 5.589# 23.76 # 279.9 " 268.4 " 402.0 " 75.37 " 10.91 # 3.497# 26
27 0.000$ 0.000$ 0.000$ 0.000$ 6.526# 21.87 # 279.3 " 324.8 " 378.1 " 96.96 " 10.86 # 2.806# 27
28 0.000$ 0.000$ 0.000$ 0.000$ 9.212# 40.10 " 621.8 " 280.3 " 348.5 " 100.4 " 9.637# 2.424$ 28
29 0.000$ 0.000$ 0.000$ 10.67 # 42.29 " 488.0 " 267.2 " 286.9 " 95.29 " 8.979# 2.093$ 29
30 0.000$ 0.000$ 0.021$ 9.219# 38.05 " 436.6 " 389.7 " 229.5 " 85.93 " 9.112# 1.862$ 30
31 0.000$ 0.000$ 8.147# 695.1 " 361.0 " 78.41 " 1.654$ 31
Mean 0.843$ 0.000$ 0.000$ 0.001$ 4.668$ 13.69 # 169.0 " 325.0 " 333.6 " 119.0 " 29.10 # 8.200$
Median 0.249$ 0.000$ 0.000$ 0.000$ 3.954$ 7.300# 95.51 " 320.5 " 338.1 " 106.7 " 23.84 # 7.677$
Maximum 4.187$ 0.000$ 0.000$ 0.021$ 10.67 $ 42.29 # 695.1 " 688.4 " 577.8 " 204.7 " 72.01 # 16.12 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 1.849$ 4.681# 37.21 " 144.6 " 187.2 " 75.37 " 8.979# 1.654$
Total 26.12$ 0.00$ 0.00$ 0.02$ 144.7 $ 410.6 # 5240 "10076 "10009 " 3689 " 872.9 # 254.2 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 84.17 $ " ... Relative Uncertainty +/-10%
Ann. Median 8.693$ # ... Relative Uncertainty +/-15%
Annual Total 30722 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 695.1 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2008
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.379$ 0.000$ 0.000$ 0.000$ 3.491# 174.1 " 197.1 " 796.7 " 109.1 " 91.58 " 62.14 " 31.54 " 1
2 1.218$ 0.000$ 0.000$ 0.000$ 3.363# 149.9 " 176.7 "1113 " 108.5 " 98.36 " 54.53 " 28.36 " 2
3 1.233$ 0.000$ 0.000$ 0.000$ 4.098# 124.1 " 157.4 " 962.6 " 101.3 " 93.04 " 49.34 " 25.69 " 3
4 1.168$ 0.000$ 0.000$ 0.000$ 5.275# 106.5 " 161.1 " 660.6 " 94.91 " 95.13 " 60.28 " 23.68 # 4
5 0.982$ 0.000$ 0.000$ 0.000$ 5.290# 94.14 " 199.5 " 523.7 " 90.71 " 107.2 " 68.52 " 22.24 # 5
6 0.810$ 0.000$ 0.000$ 0.000$ 4.753# 85.39 " 193.7 " 444.0 " 88.60 " 95.90 " 91.81 " 20.62 # 6
7 0.666$ 0.000$ 0.000$ 0.000$ 4.221# 80.83 " 168.9 " 410.6 " 85.53 " 88.26 " 99.02 " 19.09 # 7
8 0.558$ 0.000$ 0.000$ 0.000$ 3.871# 76.04 " 153.4 " 383.1 " 82.22 " 81.19 " 85.58 " 17.75 # 8
9 0.465$ 0.000$ 0.000$ 0.000$ 3.727# 130.0 " 159.6 " 353.9 " 79.70 " 75.36 " 76.53 " 17.15 # 9
10 0.375$ 0.000$ 0.000$ 0.000$ 7.201# 233.0 " 176.9 " 315.6 " 79.27 " 70.39 " 67.84 " 16.11 # 10
11 0.280$ 0.000$ 0.000$ 0.000$ 28.79 # 185.7 " 341.2 " 255.4 " 91.64 " 66.18 " 60.80 " 15.15 # 11
12 0.217$ 0.000$ 0.000$ 0.000$ 21.19 # 158.4 " 381.2 " 214.0 " 92.79 " 64.27 " 57.93 " 14.05 # 12
13 0.185$ 0.000$ 0.000$ 0.000$ 16.47 # 137.7 " 447.9 " 198.4 " 88.74 " 64.53 " 56.85 " 13.34 # 13
14 0.147$ 0.000$ 0.000$ 0.000$ 16.14 # 121.6 " 374.0 " 185.9 " 84.87 " 63.24 " 50.57 " 12.65 # 14
15 0.112$ 0.000$ 0.000$ 0.000$ 16.31 # 165.8 " 409.9 " 174.7 " 81.45 " 59.79 " 44.82 " 11.14 # 15
16 0.079$ 0.000$ 0.000$ 0.000$ 20.31 # 539.2 " 738.8 " 164.6 " 76.09 " 55.73 " 40.38 " 10.29 # 16
17 0.054$ 0.000$ 0.000$ 0.000$ 16.84 # 623.1 " 565.6 " 155.1 " 94.93 " 54.43 " 34.47 " 9.464# 17
18 0.036$ 0.000$ 0.000$ 0.000$ 16.23 # 468.3 " 665.1 " 147.8 " 115.1 " 52.48 " 31.95 " 8.837# 18
19 0.028$ 0.000$ 0.000$ 0.000$ 15.56 # 346.7 " 974.2 " 147.7 " 113.6 " 49.86 " 29.94 " 7.988# 19
20 0.019$ 0.000$ 0.000$ 0.000$ 14.39 # 233.5 " 630.3 " 153.1 " 104.4 " 45.92 " 30.75 " 7.576# 20
21 0.012$ 0.000$ 0.000$ 0.000$ 13.30 # 185.0 " 445.7 " 141.3 " 105.1 " 42.85 " 39.69 " 8.147# 21
22 0.008$ 0.000$ 0.000$ 0.000$ 58.09 # 165.0 " 384.9 " 132.2 " 114.6 " 46.75 " 46.59 " 8.029# 22
23 0.004$ 0.000$ 0.000$ 0.000$ 114.5 " 151.7 " 442.4 " 125.9 " 102.0 " 44.66 " 47.45 " 6.921# 23
24 0.002$ 0.000$ 0.000$ 0.000$ 126.5 " 140.8 " 752.3 " 121.6 " 93.00 " 62.74 " 51.09 " 6.074# 24
25 0.001$ 0.000$ 0.000$ 0.000$ 191.7 " 157.2 " 633.0 " 120.7 " 113.7 " 84.65 " 52.45 " 5.300# 25
26 0.000$ 0.000$ 0.000$ 0.035$ 152.4 " 142.5 " 513.2 " 116.4 " 117.8 " 72.46 " 47.84 " 4.723# 26
27 0.000$ 0.000$ 0.000$ 1.078$ 124.1 " 134.5 " 429.9 " 110.8 " 101.3 " 61.30 " 50.25 " 4.247# 27
28 0.000$ 0.000$ 0.000$ 1.894$ 129.6 " 168.8 " 553.8 " 107.0 " 97.03 " 53.75 " 47.43 " 3.914# 28
29 0.000$ 0.000$ 0.000$ 2.278$ 176.4 " 242.2 " 694.0 " 107.5 " 96.40 " 71.04 " 40.17 " 3.411# 29
30 0.000$ 0.000$ 3.091# 150.8 " 237.4 " 980.1 " 112.9 " 93.44 " 81.95 " 34.98 " 2.942# 30
31 0.000$ 0.000$ 156.1 " 980.7 " 108.0 " 71.21 " 2.531$ 31
Mean 0.324$ 0.000$ 0.000$ 0.279$ 52.28 # 198.6 " 454.3 " 292.4 " 96.60 " 69.88 " 53.73 " 12.55 $
Median 0.079$ 0.000$ 0.000$ 0.000$ 16.31 # 157.8 " 429.9 " 164.6 " 94.92 " 66.18 " 50.41 " 10.29 $
Maximum 1.379$ 0.000$ 0.000$ 3.091$ 191.7 # 623.1 " 980.7 "1113 " 117.8 " 107.2 " 99.02 " 31.54 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 3.363# 76.04 " 153.4 " 107.0 " 76.09 " 42.85 " 29.94 " 2.531$
Total 10.04$ 0.00$ 0.00$ 8.38$ 1621 # 5959 "14082 " 9065 " 2898 " 2166 " 1612 " 389.0 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 103.3 $ " ... Relative Uncertainty +/-10%
Ann. Median 44.74 $ # ... Relative Uncertainty +/-15%
Annual Total 37811 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1113 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2009
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 2.187$ 0.001$ 0.000$ 0.000$ 0.000$ 17.07 # 543.8 " 332.2 " 269.6 " 365.0 " 67.32 " 19.45 # 1
2 1.915$ 0.000$ 0.267$ 0.000$ 0.000$ 21.25 # 390.7 " 296.6 " 345.1 " 348.9 " 61.35 " 17.73 # 2
3 1.641$ 0.000$ 1.299$ 0.000$ 0.000$ 21.89 # 298.9 " 269.4 " 308.2 " 351.9 " 56.63 " 16.35 # 3
4 1.399$ 0.000$ 0.588$ 0.000$ 0.000$ 17.44 # 215.6 " 230.9 " 244.2 " 310.5 " 53.12 " 14.86 # 4
5 1.199$ 0.000$ 0.252$ 0.000$ 0.000$ 16.78 # 185.6 " 216.4 " 336.6 " 245.3 " 51.32 " 13.45 # 5
6 1.015$ 0.000$ 0.109$ 0.000$ 0.000$ 15.06 # 187.4 " 288.5 " 372.1 " 214.9 " 49.88 " 12.30 # 6
7 0.847$ 0.000$ 0.045$ 0.000$ 0.000$ 13.17 # 360.2 " 346.8 " 364.8 " 201.5 " 48.30 " 11.46 # 7
8 0.696$ 0.000$ 0.017$ 0.000$ 0.000$ 13.66 # 369.0 " 270.1 " 427.8 " 189.2 " 46.53 " 10.53 # 8
9 0.574$ 0.000$ 0.006$ 0.000$ 0.000$ 11.75 # 542.3 " 229.5 " 407.7 " 178.4 " 42.49 " 9.670# 9
10 0.483$ 0.000$ 0.002$ 0.000$ 0.000$ 15.04 # 759.2 " 231.2 " 443.4 " 170.8 " 39.27 " 8.672# 10
11 0.415$ 0.000$ 0.000$ 0.000$ 0.000$ 30.44 # 519.6 " 349.5 " 802.6 " 164.0 " 37.02 " 7.638# 11
12 0.342$ 0.000$ 0.000$ 0.000$ 0.000$ 33.12 " 385.0 " 381.4 " 775.3 " 155.3 " 37.22 " 6.771# 12
13 0.295$ 0.000$ 0.000$ 0.000$ 0.000$ 26.99 " 311.0 " 406.5 " 590.2 " 147.5 " 68.29 " 5.816# 13
14 0.252$ 0.000$ 0.000$ 0.000$ 0.000$ 22.98 # 226.0 " 401.9 " 478.5 " 141.3 " 75.34 " 5.056# 14
15 0.206$ 0.000$ 0.000$ 0.000$ 0.000$ 27.27 # 197.2 " 568.6 " 492.9 " 135.3 " 62.56 " 4.521# 15
16 0.170$ 0.000$ 0.000$ 0.000$ 0.000$ 71.16 " 309.2 " 638.2 " 465.5 " 126.9 " 53.30 " 4.047# 16
17 0.107$ 0.000$ 0.000$ 0.000$ 0.000$ 107.7 " 463.8 " 564.5 " 414.2 " 118.5 " 48.06 " 3.621# 17
18 0.064$ 0.000$ 0.000$ 0.000$ 0.000$ 86.46 " 487.5 " 557.7 " 555.2 " 110.9 " 48.95 " 3.273# 18
19 0.037$ 0.000$ 0.000$ 0.000$ 0.000$ 101.0 "1603 & 594.3 " 581.7 " 105.4 " 60.85 " 3.036# 19
20 0.021$ 0.000$ 0.000$ 0.000$ 0.000$ 187.5 "1668 & 539.8 " 478.3 " 98.28 " 62.46 " 2.704# 20
21 0.014$ 0.000$ 0.000$ 0.000$ 0.000$ 373.8 "1781 & 469.7 " 654.2 " 94.13 " 56.83 " 2.433$ 21
22 0.011$ 0.000$ 0.000$ 0.000$ 0.018$ 267.3 "1253 " 437.6 " 630.1 " 90.31 " 52.33 " 2.160$ 22
23 0.009$ 0.000$ 0.000$ 0.000$ 3.734$ 174.6 "1464 " 430.0 " 515.9 " 86.17 " 47.03 " 1.923$ 23
24 0.006$ 0.000$ 0.000$ 0.000$ 3.523# 317.2 "1066 " 397.2 " 460.0 " 82.34 " 39.04 " 1.685$ 24
25 0.004$ 0.000$ 0.000$ 0.000$ 3.106# 529.2 " 866.9 " 371.5 " 401.0 " 77.78 " 32.52 " 1.510$ 25
26 0.003$ 0.000$ 0.000$ 0.000$ 2.946# 379.9 " 729.8 " 347.8 " 361.7 " 73.24 " 28.29 " 1.397$ 26
27 0.002$ 0.000$ 0.000$ 0.000$ 2.457$ 399.7 " 613.3 " 302.4 " 328.9 " 71.61 " 25.74 " 1.280$ 27
28 0.002$ 0.000$ 0.000$ 0.000$ 2.126$ 597.3 " 509.8 " 273.9 " 345.5 " 76.37 " 24.55 # 1.140$ 28
29 0.001$ 0.000$ 0.000$ 1.875$ 754.4 " 430.5 " 287.3 " 383.2 " 85.06 " 23.25 # 1.033$ 29
30 0.001$ 0.000$ 0.000$ 1.708$ 884.9 " 389.8 " 241.8 " 393.6 " 79.36 " 22.40 # 1.048$ 30
31 0.001$ 0.000$ 3.859$ 361.7 " 220.8 " 72.96 " 0.953$ 31
Mean 0.449$ 0.000$ 0.083$ 0.000$ 0.818$ 184.5 # 628.7 & 370.8 " 454.3 " 153.8 " 47.41 # 6.372$
Median 0.170$ 0.000$ 0.000$ 0.000$ 0.000$ 52.14 # 463.8 & 347.8 " 421.0 " 126.9 " 48.62 # 4.047$
Maximum 2.187$ 0.001$ 1.299$ 0.000$ 3.859$ 884.9 #1781 & 638.2 " 802.6 " 365.0 " 75.34 # 19.45 $
Minimum 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 11.75 # 185.6 & 216.4 " 244.2 " 71.61 " 22.40 # 0.953$
Total 13.92$ 0.00$ 2.58$ 0.00$ 25.35$ 5536 #19488 &11494 "13628 " 4769 " 1422 # 197.5 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 155.0 & " ... Relative Uncertainty +/-10%
Ann. Median 15.04 & # ... Relative Uncertainty +/-15%
Annual Total 56577 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1781 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2010
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.787$ 0.000$ 0.000$ 0.000$ 0.000$ 20.28 # 66.34 " 242.0 " 103.7 " 40.37 " 11.77 # 1.091$ 1
2 0.640$ 0.000$ 0.000$ 0.000$ 0.000$ 17.53 # 64.40 " 194.9 " 96.54 " 37.63 " 10.25 # 0.906$ 2
3 0.513$ 0.000$ 0.000$ 0.000$ 0.000$ 15.69 # 62.56 " 169.6 " 92.77 " 35.07 " 8.696# 0.900$ 3
4 0.392$ 0.000$ 0.000$ 0.000$ 0.000$ 15.13 # 58.17 " 151.4 " 90.62 " 33.67 " 7.326# 1.066$ 4
5 0.282$ 0.000$ 0.000$ 0.000$ 0.000$ 14.79 # 53.59 " 144.0 " 87.62 " 33.91 " 6.514# 1.250$ 5
6 0.202$ 0.000$ 0.000$ 0.000$ 0.000$ 13.85 # 49.48 " 142.1 " 86.31 " 33.02 " 6.006# 1.308$ 6
7 0.145$ 0.000$ 0.000$ 0.000$ 0.000$ 16.02 # 47.40 " 130.0 " 94.94 " 30.71 " 5.659# 1.491$ 7
8 0.100$ 0.000$ 0.000$ 0.000$ 0.000$ 26.15 # 60.49 " 119.0 " 141.9 " 28.08 " 5.353# 1.889$ 8
9 0.064$ 0.000$ 0.000$ 0.000$ 0.000$ 23.14 # 163.1 " 110.3 " 134.8 " 26.48 " 5.709# 1.545$ 9
10 0.041$ 0.000$ 0.000$ 0.000$ 0.000$ 19.11 # 218.5 " 102.7 " 120.4 " 27.12 " 8.294# 1.186$ 10
11 0.025$ 0.000$ 0.000$ 0.000$ 0.000$ 17.05 # 214.8 " 100.5 " 109.5 " 32.87 " 15.67 # 0.969$ 11
12 0.015$ 0.000$ 0.000$ 0.000$ 0.000$ 15.75 # 265.6 " 539.5 " 111.0 " 32.44 " 19.73 # 0.876$ 12
13 0.009$ 0.000$ 0.000$ 0.000$ 0.000$ 14.76 # 361.2 " 769.6 " 113.6 " 29.54 " 16.29 # 0.776$ 13
14 0.005$ 0.000$ 0.000$ 0.000$ 0.000$ 18.10 # 258.0 " 525.3 " 105.7 " 26.92 " 12.95 # 0.643$ 14
15 0.003$ 0.000$ 0.000$ 0.000$ 0.539$ 24.09 # 191.8 " 384.1 " 97.61 " 23.84 # 10.47 # 0.516$ 15
16 0.002$ 0.000$ 0.000$ 0.000$ 3.583# 21.06 # 177.2 " 309.3 " 90.53 " 21.06 # 8.678# 0.402$ 16
17 0.001$ 0.000$ 0.000$ 0.000$ 4.646# 19.99 # 189.8 " 232.8 " 82.50 " 19.71 # 7.099# 0.316$ 17
18 0.000$ 0.000$ 0.000$ 0.000$ 4.870# 22.58 # 165.5 " 214.8 " 77.43 " 18.27 # 5.947# 0.237$ 18
19 0.000$ 0.000$ 0.000$ 0.000$ 3.441# 22.20 # 148.3 " 193.4 " 73.78 " 16.99 # 4.971# 0.172$ 19
20 0.000$ 0.000$ 0.000$ 0.000$ 2.296$ 20.49 # 133.4 " 180.5 " 69.59 " 16.62 # 4.106# 0.129$ 20
21 0.001$ 0.000$ 0.000$ 0.000$ 1.911$ 18.86 # 119.7 " 173.0 " 65.92 " 24.05 # 3.482# 0.162$ 21
22 0.000$ 0.000$ 0.000$ 0.000$ 2.011$ 18.09 # 108.0 " 175.5 " 62.14 " 28.73 " 3.843# 0.365$ 22
23 0.000$ 0.000$ 0.000$ 0.000$ 3.274$ 32.00 # 98.37 " 160.0 " 58.60 " 24.57 # 3.634# 0.864$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 3.873# 42.47 " 92.00 " 153.5 " 55.76 " 20.84 # 3.213# 0.965$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 3.052# 39.59 " 91.37 " 143.7 " 54.14 " 18.26 # 2.854# 0.710$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 6.237# 58.68 " 183.4 " 135.7 " 52.10 " 16.37 # 2.509$ 0.446$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 41.84 # 98.10 " 226.0 " 127.0 " 50.04 " 14.88 # 2.109$ 0.254$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 39.98 " 91.68 " 286.1 " 119.1 " 47.71 " 14.63 # 1.849$ 0.139$ 28
29 0.000$ 0.000$ 0.000$ 26.88 # 82.11 " 448.5 " 113.2 " 44.99 " 15.01 # 1.601$ 0.078$ 29
30 0.000$ 0.000$ 0.000$ 19.34 # 74.67 " 413.9 " 115.6 " 42.63 " 14.59 # 1.346$ 0.045$ 30
31 0.000$ 0.000$ 17.80 # 343.1 " 110.7 " 13.17 # 0.024$ 31
Mean 0.104$ 0.000$ 0.000$ 0.000$ 5.986$ 31.13 # 172.9 " 209.1 " 83.83 " 24.82 # 6.931$ 0.701$
Median 0.002$ 0.000$ 0.000$ 0.000$ 1.911$ 20.38 # 163.1 " 153.5 " 86.96 " 24.57 # 5.828$ 0.710$
Maximum 0.787$ 0.000$ 0.000$ 0.000$ 41.84 $ 98.10 # 448.5 " 769.6 " 141.9 " 40.37 # 19.73 $ 1.889$
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 13.85 # 47.40 " 100.5 " 42.63 " 13.17 # 1.346$ 0.024$
Total 3.230$ 0.000$ 0.000$ 0.000$ 185.6 $ 934.0 #5360 "6483 "2515 " 769.4 # 207.9 $ 21.72 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 45.15 $ " ... Relative Uncertainty +/-10%
Ann. Median 3.843$ # ... Relative Uncertainty +/-15%
Annual Total 16479 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 769.6 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2011
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.013$ 0.000$ 0.000$ 0.000$ 0.000$ 12.41 # 131.3 " 576.4 " 163.9 " 150.8 " 36.89 " 7.374# 1
2 0.007$ 0.000$ 0.000$ 0.000$ 0.000$ 14.46 # 167.4 " 484.8 " 205.4 " 143.3 " 33.73 " 6.272# 2
3 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 15.10 # 237.9 " 482.5 " 212.1 " 162.3 " 32.40 " 5.238# 3
4 0.002$ 0.000$ 0.000$ 0.000$ 0.000$ 13.77 # 233.9 " 419.7 " 193.7 " 143.3 " 40.28 " 4.332# 4
5 0.008$ 0.000$ 0.000$ 0.000$ 0.000$ 12.62 # 178.4 " 356.1 " 187.0 " 128.5 " 49.31 " 3.852# 5
6 0.019$ 0.000$ 0.000$ 0.000$ 0.000$ 11.22 # 153.3 " 272.1 " 170.8 " 119.7 " 46.94 " 3.796# 6
7 0.013$ 0.000$ 0.000$ 0.000$ 0.000$ 10.10 # 149.2 " 229.9 " 157.3 " 112.0 " 41.57 " 3.990# 7
8 0.007$ 0.000$ 0.000$ 0.000$ 0.000$ 9.271# 132.2 " 218.0 " 143.9 " 111.7 " 43.36 " 3.830# 8
9 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 8.815# 115.2 " 210.9 " 132.9 " 137.1 " 44.71 " 3.803# 9
10 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 8.606# 98.35 " 190.1 " 124.6 " 128.5 " 41.00 " 3.433# 10
11 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 8.271# 86.90 " 168.2 " 117.4 " 112.5 " 36.73 " 2.849# 11
12 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 7.531# 81.95 " 152.5 " 111.0 " 101.5 " 33.64 " 2.432$ 12
13 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 6.929# 75.31 " 147.4 " 104.9 " 95.28 " 30.94 " 2.388$ 13
14 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 9.102# 68.99 " 497.6 " 100.8 " 92.91 " 29.04 " 2.299$ 14
15 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 16.17 # 115.5 " 446.3 " 147.6 " 86.77 " 27.24 " 2.351$ 15
16 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 21.17 # 179.4 " 528.6 " 142.4 " 81.75 " 24.29 # 2.253$ 16
17 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 20.09 # 148.9 " 501.6 " 128.0 " 76.37 " 23.05 # 2.036$ 17
18 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 19.33 # 123.3 " 389.2 " 195.2 " 78.34 " 29.82 " 1.863$ 18
19 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 20.79 # 106.5 " 324.6 " 347.3 " 80.90 " 31.54 " 1.786$ 19
20 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 19.10 # 117.5 " 239.0 " 262.8 " 75.00 " 26.24 # 1.790$ 20
21 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 18.55 # 144.0 " 217.9 " 257.6 " 69.35 " 21.68 # 1.534$ 21
22 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 18.83 # 126.3 " 437.9 " 329.5 " 64.45 " 19.34 # 1.320$ 22
23 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 20.14 # 117.6 " 433.4 " 240.4 " 62.38 " 17.22 # 1.240$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 0.019$ 22.90 # 106.7 " 430.0 " 194.6 " 61.34 " 14.65 # 1.063$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 1.281$ 47.04 " 113.4 " 414.7 " 172.8 " 59.83 " 12.38 # 0.840$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 1.830$ 47.42 " 382.7 " 352.7 " 168.7 " 58.30 " 10.81 # 0.631$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 1.747$ 40.71 " 342.3 " 285.2 " 186.3 " 56.39 " 9.427# 0.471$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 1.667$ 77.12 " 377.7 " 238.3 " 212.1 " 53.55 " 8.692# 0.353$ 28
29 0.000$ 0.000$ 0.000$ 1.689$ 121.9 " 712.1 " 210.0 " 192.8 " 49.27 " 8.431# 0.250$ 29
30 0.000$ 0.000$ 0.000$ 5.827$ 123.9 " 818.6 " 189.3 " 167.8 " 44.78 " 8.575# 0.173$ 30
31 0.000$ 0.000$ 15.54 # 749.5 " 174.9 " 40.56 " 0.142$ 31
Mean 0.002$ 0.000$ 0.000$ 0.000$ 0.955$ 26.78 # 215.9 " 329.7 " 182.4 " 91.57 " 27.80 # 2.451$
Median 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 17.36 # 132.2 " 324.6 " 171.8 " 81.75 " 29.43 # 2.253$
Maximum 0.019$ 0.000$ 0.000$ 0.000$ 15.54 $ 123.9 # 818.6 " 576.4 " 347.3 " 162.3 " 49.31 # 7.374$
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 6.929# 68.99 " 147.4 " 100.8 " 40.56 " 8.431# 0.142$
Total 0.08$ 0.00$ 0.00$ 0.00$ 29.60$ 803.4 # 6692 "10220 " 5472 " 2839 " 833.9 # 75.99$
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 73.88 $ " ... Relative Uncertainty +/-10%
Ann. Median 7.531$ # ... Relative Uncertainty +/-15%
Annual Total 26965 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 818.6 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2012
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.119$ 0.000$ 0.000$ 0.000$ 0.000$ 122.2 " 135.4 " 110.8 " 139.9 " 139.4 " 27.90 " 15.30 # 1
2 0.094$ 0.000$ 0.000$ 0.000$ 0.000$ 119.1 " 129.9 " 144.4 " 136.6 " 122.7 " 27.53 " 13.52 # 2
3 0.065$ 0.000$ 0.000$ 0.000$ 0.000$ 68.88 " 117.7 " 292.9 " 154.9 " 116.6 " 27.08 " 11.23 # 3
4 0.052$ 0.000$ 0.000$ 0.000$ 0.000$ 49.88 " 106.6 " 295.8 " 427.8 " 112.0 " 28.92 " 9.314# 4
5 0.046$ 0.000$ 0.000$ 0.000$ 0.000$ 37.72 " 97.95 " 234.3 " 464.7 " 101.0 " 43.81 " 9.586# 5
6 0.035$ 0.000$ 0.000$ 0.000$ 0.000$ 31.97 " 115.3 " 200.9 " 393.4 " 92.36 " 54.63 " 7.959# 6
7 0.024$ 0.000$ 0.000$ 0.000$ 0.000$ 32.15 " 212.1 " 215.9 " 311.3 " 85.86 " 47.19 " 7.345# 7
8 0.014$ 0.000$ 0.000$ 0.000$ 0.000$ 61.70 " 175.5 " 211.0 " 217.7 " 80.70 " 39.78 " 6.218# 8
9 0.008$ 0.000$ 0.000$ 0.000$ 0.000$ 49.13 " 157.8 " 192.2 " 185.7 " 76.43 " 34.56 " 5.305# 9
10 0.004$ 0.000$ 0.000$ 0.000$ 0.000$ 51.20 " 140.1 " 172.0 " 165.0 " 72.10 " 30.42 " 4.550# 10
11 0.002$ 0.000$ 0.000$ 0.000$ 0.000$ 181.0 " 143.3 " 155.8 " 167.4 " 67.44 " 28.45 " 4.045# 11
12 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 187.4 " 146.4 " 183.7 " 163.5 " 63.46 " 26.20 " 4.761# 12
13 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 689.3 " 136.3 " 358.1 " 144.4 " 61.31 " 23.09 # 7.189# 13
14 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 440.0 " 126.6 " 308.2 " 131.0 " 66.66 " 20.58 # 10.93 # 14
15 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 424.4 " 117.6 " 272.4 " 120.7 " 71.32 " 18.39 # 12.62 # 15
16 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 336.4 " 128.9 " 218.4 " 111.1 " 68.36 " 16.55 # 10.61 # 16
17 0.000$ 0.000$ 0.000$ 0.000$ 1.055$ 225.2 " 132.0 " 185.5 " 104.2 " 63.49 " 14.96 # 8.589# 17
18 0.000$ 0.000$ 0.000$ 0.000$ 2.243$ 181.0 " 119.1 " 163.9 " 100.9 " 58.84 " 13.44 # 7.147# 18
19 0.000$ 0.000$ 0.000$ 0.000$ 2.208$ 204.6 " 110.7 " 148.1 " 96.95 " 55.88 " 12.50 # 5.706# 19
20 0.000$ 0.000$ 0.000$ 0.000$ 2.081$ 350.0 " 105.4 " 140.2 " 95.10 " 53.22 " 11.37 # 4.476# 20
21 0.000$ 0.000$ 0.000$ 0.000$ 1.975$ 319.3 " 99.22 " 148.0 " 104.7 " 50.15 " 10.20 # 3.566# 21
22 0.000$ 0.000$ 0.000$ 0.000$ 1.853$ 210.0 " 93.18 " 169.2 " 122.0 " 55.03 " 9.184# 2.989# 22
23 0.000$ 0.000$ 0.000$ 0.000$ 1.796$ 169.5 " 92.87 " 153.1 " 118.0 " 65.37 " 8.692# 2.545$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 1.681$ 145.0 " 109.1 " 141.1 " 106.3 " 58.62 " 8.050# 2.122$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 1.580$ 128.4 " 105.4 " 129.9 " 103.7 " 51.57 " 7.762# 1.817$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 1.554$ 120.5 " 99.90 " 119.6 " 123.4 " 45.57 " 6.874# 1.541$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 1.500$ 160.7 " 96.28 " 118.8 " 194.3 " 40.13 " 6.110# 1.305$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 1.455$ 179.1 " 94.77 " 113.2 " 230.4 " 36.35 " 5.816# 1.089$ 28
29 0.000$ 0.000$ 0.000$ 0.000$ 1.428$ 160.2 " 92.30 " 109.9 " 193.0 " 33.34 " 7.585# 0.852$ 29
30 0.000$ 0.000$ 0.000$ 1.500$ 143.0 " 88.49 " 104.4 " 160.3 " 31.55 " 12.82 # 0.652$ 30
31 0.000$ 0.000$ 8.317$ 83.68 " 105.1 " 29.96 " 0.463$ 31
Mean 0.015$ 0.000$ 0.000$ 0.000$ 1.040$ 186.0 " 119.7 " 181.2 " 176.3 " 68.60 " 21.02 # 5.979$
Median 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 160.5 " 115.3 " 163.9 " 142.2 " 63.49 " 17.47 # 5.305$
Maximum 0.119$ 0.000$ 0.000$ 0.000$ 8.317$ 689.3 " 212.1 " 358.1 " 464.7 " 139.4 " 54.63 # 15.30 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 31.97 " 83.68 " 104.4 " 95.10 " 29.96 " 5.816# 0.463$
Total 0.465$ 0.000$ 0.000$ 0.000$ 32.23 $5579 "3710 "5617 "5288 "2127 " 630.5 # 185.3 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 63.30 $ " ... Relative Uncertainty +/-10%
Ann. Median 9.249$ # ... Relative Uncertainty +/-15%
Annual Total 23169 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 689.3 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2013
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.311$ 0.000$ 0.000$ 0.000$ 0.000$ 86.32 " 196.1 " 373.7 " 414.3 " 399.4 " 65.08 " 32.29 " 1
2 0.215$ 0.000$ 0.000$ 0.000$ 0.000$ 74.52 " 172.4 " 352.4 " 392.4 " 361.3 " 62.81 " 30.30 " 2
3 0.140$ 0.000$ 0.000$ 0.000$ 0.000$ 63.84 " 161.5 " 310.8 " 375.5 " 326.5 " 58.45 " 25.04 # 3
4 0.083$ 0.000$ 0.000$ 0.000$ 0.000$ 56.19 " 168.6 " 257.9 " 412.1 " 275.0 " 54.57 " 18.64 # 4
5 0.047$ 0.000$ 0.000$ 0.000$ 0.000$ 54.79 " 164.0 " 235.0 " 374.1 " 235.8 " 51.13 " 14.91 # 5
6 0.032$ 0.000$ 0.000$ 0.000$ 0.000$ 54.58 " 145.5 " 329.0 " 335.2 " 226.6 " 48.24 " 12.14 # 6
7 0.027$ 0.000$ 0.000$ 0.000$ 0.000$ 51.30 " 128.8 " 712.5 & 281.3 " 211.0 " 49.43 " 9.903# 7
8 0.017$ 0.000$ 0.000$ 0.000$ 0.000$ 48.77 " 116.1 "1445 & 319.0 " 197.2 " 46.26 " 8.650# 8
9 0.011$ 0.000$ 0.000$ 0.000$ 0.000$ 57.88 " 116.1 " 908.1 " 314.0 " 193.0 " 41.30 " 7.924# 9
10 0.006$ 0.000$ 0.000$ 0.000$ 0.000$ 70.09 " 158.1 " 623.5 " 253.5 " 175.7 " 37.47 " 7.112# 10
11 0.003$ 0.000$ 0.000$ 0.000$ 0.000$ 69.97 " 150.1 " 522.0 " 351.3 " 164.4 " 33.52 " 6.310# 11
12 0.001$ 0.000$ 0.000$ 0.000$ 6.519$ 64.32 " 137.7 " 486.1 " 487.8 " 160.0 " 30.14 " 5.475# 12
13 0.000$ 0.000$ 0.000$ 0.000$ 9.168# 58.20 " 126.3 " 430.3 " 448.0 " 148.5 " 27.94 " 4.715# 13
14 0.000$ 0.000$ 0.000$ 0.000$ 8.668# 53.74 " 243.2 " 416.9 " 999.9 & 137.7 " 26.83 " 3.957# 14
15 0.000$ 0.000$ 0.000$ 0.000$ 7.904# 50.19 "2237 & 398.4 "1671 & 130.2 " 24.83 # 3.196# 15
16 0.000$ 0.000$ 0.000$ 0.000$ 8.512# 48.05 "1538 & 506.9 "1196 " 129.1 " 21.45 # 2.569$ 16
17 0.000$ 0.000$ 0.000$ 0.000$ 40.43 # 63.39 "1161 " 564.4 "1387 " 125.4 " 19.53 # 2.156$ 17
18 0.000$ 0.000$ 0.000$ 0.000$ 67.09 " 61.26 " 782.8 " 469.0 " 927.6 " 118.8 " 19.48 # 1.933$ 18
19 0.000$ 0.000$ 0.000$ 0.000$ 63.32 " 60.18 " 580.7 " 399.4 " 725.4 " 120.7 " 17.69 # 1.661$ 19
20 0.000$ 0.000$ 0.000$ 0.000$ 60.37 " 58.04 " 449.9 " 365.7 " 690.1 " 163.6 " 14.60 # 1.493$ 20
21 0.000$ 0.000$ 0.000$ 0.000$ 53.43 " 65.85 " 390.4 " 355.1 " 733.1 " 160.4 " 12.79 # 1.262$ 21
22 0.000$ 0.000$ 0.000$ 0.000$ 45.13 " 60.68 " 356.2 " 326.9 " 694.3 " 134.1 " 12.64 # 1.081$ 22
23 0.000$ 0.000$ 0.000$ 0.000$ 38.45 " 225.0 " 317.0 " 274.2 "1228 " 115.9 " 14.76 # 0.905$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 33.62 "1069 " 507.4 " 227.6 " 997.0 " 104.6 " 19.93 # 0.765$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 30.01 " 747.4 " 495.5 " 228.8 " 688.6 " 96.06 " 20.66 # 0.700$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 27.37 " 529.5 " 511.5 " 695.3 " 558.9 " 89.39 " 18.14 # 0.668$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 25.39 " 369.6 " 719.1 " 650.9 " 475.0 " 84.33 " 14.50 # 0.577$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 26.41 " 273.1 " 642.9 " 613.4 " 420.0 " 79.72 " 11.97 # 0.465$ 28
29 0.000$ 0.000$ 0.000$ 27.82 " 223.0 " 497.1 " 500.7 " 402.0 " 75.59 " 11.92 # 0.356$ 29
30 0.000$ 0.000$ 0.000$ 44.61 " 211.5 " 432.7 " 432.5 " 420.0 " 72.14 " 21.54 # 0.269$ 30
31 0.000$ 0.000$ 84.98 " 392.7 " 430.4 " 67.98 " 0.206$ 31
Mean 0.029$ 0.000$ 0.000$ 0.000$ 22.88 $ 166.0 " 457.9 & 478.8 & 632.4 & 163.9 " 30.32 # 6.698$
Median 0.000$ 0.000$ 0.000$ 0.000$ 9.168$ 63.61 " 356.2 & 430.3 & 461.5 & 137.7 " 23.19 # 2.569$
Maximum 0.311$ 0.000$ 0.000$ 0.000$ 84.98 $1069 "2237 &1445 &1671 & 399.4 " 65.08 # 32.29 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 48.05 " 116.1 & 227.6 & 253.5 & 67.98 " 11.92 # 0.206$
Total 0.89$ 0.00$ 0.00$ 0.00$ 709.2 $ 4980 "14196 &14843 &18973 & 5080 " 909.6 # 207.6 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 164.1 & " ... Relative Uncertainty +/-10%
Ann. Median 26.41 & # ... Relative Uncertainty +/-15%
Annual Total 59899 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 2237 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2014
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.142$ 0.000$ 0.000$ 0.000$ 0.000$ 11.17 # 94.79 " 214.8 " 520.0 " 176.1 " 45.86 " 31.69 " 1
2 0.086$ 0.000$ 0.000$ 0.000$ 0.000$ 13.39 # 130.5 " 192.0 " 417.3 " 159.7 " 42.94 " 26.68 # 2
3 0.050$ 0.000$ 0.000$ 0.000$ 0.000$ 12.33 # 203.7 " 175.1 " 373.5 " 145.7 " 50.81 " 21.79 # 3
4 0.032$ 0.000$ 0.000$ 0.000$ 0.000$ 11.20 # 185.3 " 159.0 " 327.8 " 138.8 " 50.11 " 18.51 # 4
5 0.043$ 0.000$ 0.000$ 0.000$ 0.000$ 10.09 # 158.5 " 147.4 " 259.9 " 148.0 " 43.87 " 16.59 # 5
6 0.055$ 0.000$ 0.000$ 0.000$ 0.000$ 9.358# 321.4 " 137.9 " 227.9 " 169.1 " 40.65 " 15.68 # 6
7 0.061$ 0.000$ 0.000$ 0.000$ 0.000$ 8.815# 652.5 " 135.1 " 302.5 " 159.9 " 45.23 " 14.70 # 7
8 0.062$ 0.000$ 0.000$ 0.000$ 0.000$ 8.658#1033 " 133.9 " 388.4 " 144.2 " 44.38 " 13.87 # 8
9 0.060$ 0.000$ 0.000$ 0.000$ 0.000$ 9.138# 590.4 " 123.7 " 461.7 " 135.0 " 38.38 " 12.94 # 9
10 0.053$ 0.000$ 0.000$ 0.000$ 0.000$ 22.06 # 418.0 " 115.0 " 419.6 " 127.0 " 35.54 " 11.93 # 10
11 0.046$ 0.000$ 0.000$ 0.000$ 0.000$ 39.79 " 408.8 " 108.3 " 361.7 " 118.8 " 33.87 " 10.84 # 11
12 0.039$ 0.000$ 0.000$ 0.000$ 0.000$ 28.31 " 381.7 " 101.6 " 302.5 " 113.6 " 33.67 " 9.703# 12
13 0.031$ 0.000$ 0.000$ 0.000$ 0.000$ 23.57 # 305.2 " 94.06 " 235.5 " 106.8 " 37.08 " 8.550# 13
14 0.026$ 0.000$ 0.000$ 0.000$ 0.000$ 20.27 # 339.7 " 88.46 " 207.0 " 99.21 " 36.18 " 7.828# 14
15 0.021$ 0.000$ 0.000$ 0.000$ 0.000$ 18.50 # 384.0 " 92.51 " 193.5 " 92.46 " 32.91 " 7.078# 15
16 0.019$ 0.000$ 0.000$ 0.000$ 0.000$ 17.69 # 337.7 " 90.70 " 176.5 " 87.95 " 30.29 " 6.697# 16
17 0.012$ 0.000$ 0.000$ 0.000$ 0.000$ 55.55 # 252.2 " 88.98 " 163.2 " 82.96 " 27.89 " 6.353# 17
18 0.007$ 0.000$ 0.000$ 0.000$ 0.000$ 249.9 " 204.6 " 139.8 " 152.4 " 79.23 " 25.28 " 6.032# 18
19 0.004$ 0.000$ 0.000$ 0.000$ 0.000$ 244.7 " 183.8 " 253.2 " 142.8 " 75.83 " 24.82 " 5.577# 19
20 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 200.6 " 196.3 " 192.4 " 134.5 " 74.58 " 24.28 # 5.116# 20
21 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 188.2 " 192.7 " 225.6 " 171.6 " 74.48 " 24.09 # 4.625# 21
22 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 375.4 " 290.7 " 357.4 " 344.1 " 70.55 " 25.39 " 4.149# 22
23 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 349.4 " 405.9 " 275.5 " 263.0 " 66.03 " 24.37 # 3.675# 23
24 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 208.6 " 368.0 " 203.1 " 198.7 " 65.12 " 22.83 # 3.271# 24
25 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 162.5 " 354.1 " 191.3 " 181.5 " 62.92 " 20.30 # 2.959# 25
26 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 138.1 " 458.8 " 274.5 " 170.2 " 61.17 " 18.59 # 2.699# 26
27 0.000$ 0.000$ 0.000$ 0.000$ 2.203$ 126.0 " 760.5 " 341.0 " 202.4 " 58.98 " 19.97 # 2.467$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 8.781# 110.7 " 545.1 " 263.0 " 260.6 " 56.40 " 42.83 " 2.198$ 28
29 0.000$ 0.000$ 0.000$ 11.41 # 98.89 " 415.4 " 694.5 " 221.2 " 53.50 " 44.88 " 1.993$ 29
30 0.000$ 0.000$ 0.000$ 10.45 # 90.49 " 358.1 "1058 " 199.3 " 49.27 " 37.30 " 1.907$ 30
31 0.000$ 0.000$ 9.660# 285.8 " 692.1 " 47.39 " 1.797$ 31
Mean 0.027$ 0.000$ 0.000$ 0.000$ 1.371$ 95.45 # 361.8 " 237.4 " 266.0 " 100.0 " 34.15 # 9.351$
Median 0.019$ 0.000$ 0.000$ 0.000$ 0.000$ 34.05 # 339.7 " 175.1 " 231.7 " 87.95 " 34.71 # 6.697$
Maximum 0.142$ 0.000$ 0.000$ 0.000$ 11.41 $ 375.4 #1033 "1058 " 520.0 " 176.1 " 50.81 # 31.69 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 8.658# 94.79 " 88.46 " 134.5 " 47.39 " 18.59 # 1.797$
Total 0.85$ 0.00$ 0.00$ 0.00$ 42.51$ 2863 #11217 " 7360 " 7981 " 3101 " 1025 # 289.9 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 92.82 $ " ... Relative Uncertainty +/-10%
Ann. Median 13.39 $ # ... Relative Uncertainty +/-15%
Annual Total 33880 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1058 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2015
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.693$ 0.000$ 0.000$ 0.000$ 7.015# 23.26 # 49.20 " 150.2 " 173.1 " 57.46 " 31.39 " 4.210# 1
2 1.585$ 0.000$ 0.000$ 0.000$ 4.741# 31.59 # 47.47 " 134.5 " 153.6 " 54.13 " 29.67 " 3.941# 2
3 1.490$ 0.000$ 0.000$ 0.000$ 3.756# 45.02 " 57.24 " 116.8 " 134.5 " 60.07 " 26.63 " 3.701# 3
4 1.394$ 0.000$ 0.000$ 0.000$ 3.637# 44.43 " 59.49 " 105.3 " 122.3 " 63.49 " 23.11 # 3.424# 4
5 1.300$ 0.000$ 0.000$ 0.000$ 3.667# 38.24 " 57.50 " 97.54 " 127.9 " 66.99 " 20.07 # 3.351# 5
6 1.167$ 0.000$ 0.000$ 0.000$ 3.537# 34.83 " 55.84 " 92.12 " 119.7 " 66.86 " 18.41 # 3.984# 6
7 1.079$ 0.000$ 0.000$ 0.000$ 3.197# 33.76 " 54.58 " 87.91 " 108.6 " 56.81 " 17.40 # 5.441# 7
8 0.941$ 0.000$ 0.000$ 0.000$ 3.123# 32.70 " 59.89 " 92.64 " 100.3 " 50.91 " 16.61 # 5.460# 8
9 0.820$ 0.000$ 0.000$ 0.000$ 3.051# 30.83 " 57.37 " 127.3 " 94.24 " 47.10 " 16.95 # 5.599# 9
10 0.704$ 0.000$ 0.000$ 0.000$ 2.867# 29.00 " 62.31 " 143.2 " 94.43 " 42.84 " 16.86 # 4.881# 10
11 0.585$ 0.000$ 0.000$ 0.000$ 2.734# 27.59 " 63.86 " 156.6 " 124.1 " 39.69 " 16.45 # 4.401# 11
12 0.485$ 0.000$ 0.000$ 0.000$ 2.541$ 33.88 " 57.18 " 141.6 " 174.9 " 37.87 " 15.42 # 4.058# 12
13 0.393$ 0.000$ 0.000$ 0.000$ 2.354$ 39.65 " 52.50 " 127.7 " 194.6 " 35.59 " 14.35 # 3.572# 13
14 0.316$ 0.000$ 0.000$ 0.000$ 2.225$ 34.79 " 49.11 " 117.2 " 170.1 " 34.08 " 13.13 # 3.178# 14
15 0.253$ 0.000$ 0.000$ 0.000$ 2.079$ 31.97 " 45.99 " 108.3 " 151.7 " 32.26 " 11.52 # 2.867# 15
16 0.201$ 0.000$ 0.000$ 0.000$ 7.597$ 30.72 " 43.17 " 100.0 " 135.9 " 30.28 " 9.932# 2.703# 16
17 0.161$ 0.000$ 0.000$ 0.000$ 105.2 " 29.46 " 41.65 " 103.5 " 122.5 " 28.46 " 9.135# 2.550$ 17
18 0.130$ 0.000$ 0.000$ 0.000$ 91.98 " 28.91 " 50.50 " 169.0 " 111.8 " 28.30 " 8.566# 2.437$ 18
19 0.103$ 0.000$ 0.000$ 0.000$ 61.07 " 30.19 " 78.29 " 186.8 " 104.8 " 31.99 " 8.318# 2.149$ 19
20 0.079$ 0.000$ 0.000$ 0.000$ 45.17 " 36.93 " 314.5 " 197.8 " 98.11 " 33.26 " 8.155# 1.930$ 20
21 0.057$ 0.000$ 0.000$ 0.000$ 35.27 " 69.74 " 351.6 " 241.7 " 91.64 " 30.71 " 7.693# 1.741$ 21
22 0.039$ 0.000$ 0.000$ 0.000$ 29.94 " 106.0 " 251.8 " 354.8 " 86.39 " 28.44 " 7.161# 1.537$ 22
23 0.024$ 0.000$ 0.000$ 0.000$ 27.20 " 105.1 " 291.6 " 364.7 " 81.23 " 26.31 " 6.930# 1.321$ 23
24 0.014$ 0.000$ 0.000$ 0.000$ 28.48 " 90.39 " 259.0 " 257.9 " 75.27 " 25.44 " 6.598# 1.085$ 24
25 0.007$ 0.000$ 0.000$ 0.000$ 29.73 " 79.41 " 191.1 " 194.4 " 71.14 " 25.80 " 6.090# 0.872$ 25
26 0.002$ 0.000$ 0.000$ 0.000$ 31.20 " 71.63 " 160.8 " 167.1 " 68.49 " 24.95 # 5.811# 0.714$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 33.01 " 65.46 " 139.6 " 148.3 " 68.64 " 23.06 # 5.468# 0.587$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 29.59 " 59.31 " 124.9 " 133.9 " 66.21 " 20.74 # 5.102# 0.476$ 28
29 0.000$ 0.000$ 0.000$ 27.34 " 55.04 " 116.0 " 124.9 " 63.80 " 18.89 # 4.792# 0.387$ 29
30 0.000$ 0.000$ 0.413$ 25.55 " 51.61 " 106.8 " 137.1 " 60.79 " 18.60 # 4.517# 0.318$ 30
31 0.000$ 0.000$ 24.17 # 118.8 " 135.7 " 25.28 # 0.246$ 31
Mean 0.485$ 0.000$ 0.000$ 0.014$ 22.03 $ 47.38 # 111.9 " 155.4 " 111.7 " 37.63 # 13.07 # 2.681$
Median 0.201$ 0.000$ 0.000$ 0.000$ 7.597$ 35.88 # 59.89 " 135.7 " 106.7 " 32.26 # 10.73 # 2.703$
Maximum 1.693$ 0.000$ 0.000$ 0.413$ 105.2 $ 106.0 # 351.6 " 364.7 " 194.6 " 66.99 # 31.39 # 5.599$
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 2.079$ 23.26 # 41.65 " 87.91 " 60.79 " 18.60 # 4.517# 0.246$
Total 15.02 $ 0.000$ 0.000$ 0.413$ 683.1 $1421 #3470 "4817 "3351 "1167 # 392.2 # 83.12 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 42.19 $ " ... Relative Uncertainty +/-10%
Ann. Median 11.52 $ # ... Relative Uncertainty +/-15%
Annual Total 15399 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 364.7 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2016
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.179$ 4.072# 0.000$ 0.000$ 0.000$ 26.90 " 207.8 " 239.8 " 470.9 " 204.3 " 74.38 # 10.58 # 1
2 0.129$ 3.236# 0.000$ 0.000$ 0.000$ 23.90 # 172.3 " 205.5 " 400.3 " 207.3 " 68.99 # 9.951# 2
3 0.090$ 2.767# 0.000$ 0.000$ 0.000$ 21.88 # 154.8 " 185.6 " 367.1 " 190.8 " 64.98 # 9.328# 3
4 0.061$ 3.345# 0.000$ 0.000$ 0.000$ 25.23 # 156.9 " 363.1 " 330.2 " 178.7 " 62.68 # 9.163# 4
5 0.036$ 2.442$ 0.000$ 0.000$ 0.000$ 27.45 " 138.2 " 387.0 " 266.2 " 204.0 " 60.28 # 8.761# 5
6 0.020$ 1.851$ 0.000$ 0.000$ 0.000$ 24.09 # 124.2 " 333.2 " 221.4 " 192.2 " 57.19 # 8.107# 6
7 0.009$ 1.464$ 0.000$ 0.000$ 0.000$ 59.23 " 114.0 " 537.1 " 274.4 " 198.1 " 55.69 # 7.678# 7
8 0.003$ 1.240$ 0.000$ 0.000$ 0.000$ 84.55 " 113.9 " 669.5 " 345.2 " 285.3 " 53.61 # 7.528# 8
9 0.001$ 1.006$ 0.000$ 0.000$ 0.000$ 79.19 " 139.5 " 641.2 " 274.5 " 347.5 " 51.23 # 6.922# 9
10 0.000$ 0.781$ 0.000$ 0.000$ 0.000$ 160.1 " 232.9 " 467.6 " 230.9 " 281.7 " 50.77 # 6.383# 10
11 0.000$ 0.633$ 0.000$ 0.000$ 0.000$ 266.6 " 312.9 " 396.9 " 247.6 " 231.9 " 58.57 # 5.773# 11
12 0.000$ 0.500$ 0.000$ 0.000$ 0.000$ 181.5 " 230.5 " 444.9 " 206.2 " 201.7 " 55.38 # 10.32 # 12
13 0.000$ 0.382$ 0.000$ 0.000$ 0.000$ 368.4 " 182.1 " 409.1 " 180.6 " 178.9 " 49.22 # 22.72 # 13
14 0.000$ 0.295$ 0.000$ 0.000$ 0.000$ 369.3 " 157.2 " 365.6 " 165.6 " 163.9 " 45.74 # 22.06 # 14
15 0.000$ 0.205$ 0.000$ 0.000$ 0.000$ 251.7 " 161.9 " 333.9 " 159.8 " 158.3 " 41.91 # 18.76 # 15
16 0.000$ 0.126$ 0.000$ 0.000$ 0.000$ 200.9 " 564.5 " 324.2 " 173.5 " 156.3 " 38.49 # 13.90 # 16
17 0.000$ 0.070$ 0.000$ 0.000$ 0.000$ 162.4 "1460 " 348.2 " 163.8 " 148.0 " 38.66 # 10.33 # 17
18 0.000$ 0.035$ 0.000$ 0.000$ 0.000$ 136.6 "1336 " 602.5 " 152.7 " 142.2 # 36.38 # 8.338# 18
19 1.103$ 0.016$ 0.000$ 0.000$ 0.000$ 123.7 " 922.2 " 469.1 " 222.2 " 133.0 # 34.13 # 6.977# 19
20 22.57 # 0.007$ 0.000$ 0.000$ 0.000$ 142.2 " 613.4 " 421.3 " 217.2 " 133.1 # 32.21 # 6.167# 20
21 15.49 # 0.002$ 0.000$ 0.000$ 12.15 $ 143.5 "1009 " 416.7 " 180.6 " 129.2 # 30.93 # 5.284# 21
22 10.59 # 0.001$ 0.000$ 0.000$ 22.76 # 132.7 "1048 " 404.7 " 174.6 " 117.0 # 29.39 # 4.443# 22
23 8.122# 0.000$ 0.000$ 0.000$ 16.55 # 129.0 " 661.3 " 374.9 " 213.1 " 107.3 # 27.47 # 3.791# 23
24 8.177# 0.000$ 0.000$ 0.000$ 62.70 # 122.0 " 503.3 " 333.2 " 212.5 " 100.4 # 25.48 # 3.202# 24
25 7.737# 0.000$ 0.000$ 0.000$ 72.45 " 125.8 " 420.3 " 260.9 " 231.0 " 94.95 # 22.92 # 2.753$ 25
26 7.348# 0.000$ 0.000$ 0.000$ 56.41 " 133.2 " 379.0 " 222.7 " 219.4 " 91.49 # 19.13 # 2.377$ 26
27 6.845# 0.000$ 0.000$ 0.000$ 45.89 " 127.8 " 348.7 " 445.4 " 201.1 " 85.18 # 16.55 # 2.509$ 27
28 6.388# 0.000$ 0.000$ 0.000$ 43.27 " 189.8 " 303.8 " 573.9 " 250.7 " 80.38 # 14.90 # 2.460$ 28
29 5.955# 0.000$ 0.000$ 0.000$ 46.74 " 301.4 " 259.0 " 534.4 " 240.7 " 79.08 # 13.04 # 2.229$ 29
30 5.870# 0.000$ 0.000$ 36.45 " 296.2 " 254.1 " 448.0 " 207.6 " 81.06 # 11.62 # 2.171$ 30
31 5.256# 0.000$ 30.24 " 265.7 " 423.4 " 78.09 # 2.097$ 31
Mean 3.612$ 0.844$ 0.000$ 0.000$ 14.37 $ 147.9 # 417.7 " 405.9 " 240.1 " 160.7 # 41.40 # 7.841$
Median 0.090$ 0.205$ 0.000$ 0.000$ 0.000$ 132.9 # 259.0 " 404.7 " 220.4 " 156.3 # 40.29 # 6.977$
Maximum 22.57 $ 4.072$ 0.000$ 0.000$ 72.45 $ 369.3 #1460 " 669.5 " 470.9 " 347.5 # 74.38 # 22.72 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 21.88 # 113.9 " 185.6 " 152.7 " 78.09 # 11.62 # 2.097$
Total 112.0 $ 24.48$ 0.00$ 0.00$ 445.6 $ 4437 #12948 "12583 " 7202 " 4981 # 1242 # 243.1 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 120.8 $ " ... Relative Uncertainty +/-10%
Ann. Median 23.99 $ # ... Relative Uncertainty +/-15%
Annual Total 44218 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1460 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2017
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.876$ 0.000$ 0.000$ 0.000$ 0.211$ 4.944# 23.42 # 455.8 " 224.5 " 212.6 " 63.72 # 5.668# 1
2 1.678$ 0.000$ 0.000$ 0.000$ 0.204$ 4.884# 30.89 # 389.5 " 261.4 " 186.2 " 60.66 # 5.120# 2
3 1.464$ 0.000$ 0.000$ 0.000$ 0.151$ 5.497# 31.31 # 326.7 " 222.1 " 169.4 " 57.35 # 4.548# 3
4 1.238$ 0.000$ 0.000$ 0.000$ 0.295$ 6.190# 36.26 # 305.1 " 189.9 " 152.8 " 53.14 # 5.980# 4
5 1.027$ 0.000$ 0.000$ 0.000$ 0.972$ 6.051# 49.50 # 260.4 " 171.3 " 137.9 # 48.84 # 10.15 # 5
6 0.880$ 0.000$ 0.000$ 0.000$ 1.310$ 5.719# 62.86 # 219.8 " 156.3 " 129.4 # 44.86 # 11.37 # 6
7 0.753$ 0.000$ 0.000$ 0.000$ 1.832$ 5.172# 75.94 # 199.3 " 144.4 " 141.1 # 41.02 # 11.07 # 7
8 0.645$ 0.000$ 0.000$ 0.000$ 1.746$ 4.784# 78.54 # 434.7 " 138.2 # 142.7 " 36.88 # 9.823# 8
9 0.543$ 0.000$ 0.000$ 0.000$ 2.141$ 4.529# 70.37 #1096 " 131.8 # 132.0 # 33.35 # 7.775# 9
10 0.457$ 0.000$ 0.000$ 0.000$ 2.031$ 4.350# 72.81 # 841.6 " 129.6 # 125.7 # 29.11 # 6.251# 10
11 0.375$ 0.000$ 0.000$ 0.000$ 1.848$ 4.334# 137.1 # 557.4 " 134.5 # 120.3 # 25.15 # 5.189# 11
12 0.302$ 0.000$ 0.000$ 0.000$ 1.703$ 4.333# 179.7 " 559.3 " 135.0 # 111.2 # 21.88 # 4.155# 12
13 0.217$ 0.000$ 0.000$ 0.000$ 1.669$ 5.811# 152.1 " 644.3 " 122.1 # 105.7 # 21.16 # 3.495# 13
14 0.146$ 0.000$ 0.000$ 0.000$ 1.919$ 23.06 # 132.8 # 665.6 " 114.6 # 99.82 # 18.46 # 3.195# 14
15 0.094$ 0.000$ 0.000$ 0.000$ 3.078$ 30.08 # 122.1 # 669.8 " 110.9 # 97.40 # 16.00 # 2.942$ 15
16 0.060$ 0.000$ 0.000$ 0.000$ 4.553# 19.32 # 143.6 # 549.3 " 106.6 # 98.41 # 14.25 # 2.735$ 16
17 0.037$ 0.000$ 0.000$ 0.000$ 4.179# 15.61 # 129.7 # 459.2 " 103.3 # 120.4 # 13.38 # 2.702$ 17
18 0.021$ 0.000$ 0.000$ 0.000$ 3.317# 14.86 # 112.5 # 476.8 " 99.46 # 123.3 # 13.27 # 15.43 # 18
19 0.012$ 0.000$ 0.000$ 0.000$ 3.315# 13.99 # 159.5 # 635.1 " 97.92 # 108.8 # 12.71 # 56.63 # 19
20 0.006$ 0.000$ 0.000$ 0.000$ 4.526# 14.10 # 268.9 " 630.7 " 97.91 # 96.73 # 11.86 # 49.92 # 20
21 0.003$ 0.000$ 0.000$ 0.000$ 6.513# 18.85 # 268.0 " 481.1 " 109.0 # 88.70 # 11.33 # 38.88 # 21
22 0.002$ 0.000$ 0.000$ 0.000$ 9.577# 25.62 # 272.4 " 412.7 " 142.4 # 98.73 # 10.51 # 29.77 # 22
23 0.001$ 0.000$ 0.000$ 0.000$ 7.371# 29.48 # 250.8 " 399.1 " 150.0 " 100.0 # 9.354# 21.55 # 23
24 0.000$ 0.000$ 0.000$ 0.000$ 6.372# 25.70 # 250.9 " 354.5 " 140.5 # 88.71 # 8.391# 15.73 # 24
25 0.000$ 0.000$ 0.000$ 0.000$ 6.183# 20.87 # 234.2 " 317.2 " 183.9 " 81.19 # 7.642# 12.16 # 25
26 0.000$ 0.000$ 0.000$ 0.000$ 5.997# 18.09 # 224.6 " 288.8 " 319.7 " 78.08 # 6.964# 9.290# 26
27 0.000$ 0.000$ 0.000$ 0.000$ 5.965# 16.29 # 291.2 " 263.6 " 348.5 " 85.38 # 6.353# 6.734# 27
28 0.000$ 0.000$ 0.000$ 0.000$ 5.972# 15.33 # 389.5 " 236.3 " 308.7 " 82.54 # 5.998# 5.142# 28
29 0.000$ 0.000$ 0.012$ 5.465# 14.68 # 421.0 " 209.7 " 299.2 " 77.69 # 6.004# 4.092# 29
30 0.000$ 0.000$ 0.087$ 4.988# 15.95 # 384.9 " 190.6 " 251.7 " 71.65 # 5.841# 3.298# 30
31 0.000$ 0.000$ 4.753# 358.3 " 192.0 " 67.46 # 2.735$ 31
Mean 0.382$ 0.000$ 0.000$ 0.003$ 3.553$ 13.28 # 174.7 # 442.7 " 171.5 # 113.9 # 23.85 # 12.05 $
Median 0.060$ 0.000$ 0.000$ 0.000$ 3.315$ 14.39 # 143.6 # 412.7 " 141.5 # 105.7 # 15.13 # 6.251$
Maximum 1.876$ 0.000$ 0.000$ 0.087$ 9.577$ 30.08 # 421.0 #1096 " 348.5 # 212.6 # 63.72 # 56.63 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.151$ 4.333# 23.42 # 190.6 " 97.91 # 67.46 # 5.841# 2.702$
Total 11.84$ 0.00$ 0.00$ 0.10$ 110.2 $ 398.5 # 5416 #13722 " 5145 # 3532 # 715.4 # 373.5 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 80.62 $ " ... Relative Uncertainty +/-10%
Ann. Median 6.734$ # ... Relative Uncertainty +/-15%
Annual Total 29425 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1096 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2018
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 2.288$ 0.004$ 0.000$ 0.000$ 3.043$ 33.48 # 153.8 " 326.3 " 584.4 " 116.5 # 60.21 # 23.96 # 1
2 1.876$ 0.001$ 0.000$ 0.000$ 2.661$ 31.29 # 533.4 " 381.7 " 482.6 " 116.8 # 57.55 # 21.63 # 2
3 1.590$ 0.001$ 0.000$ 0.000$ 2.542$ 24.88 #1166 " 395.6 " 423.7 " 111.1 # 55.92 # 18.86 # 3
4 1.336$ 0.000$ 0.000$ 0.000$ 3.104# 21.54 # 640.3 " 542.7 " 394.5 " 110.9 # 54.34 # 17.70 # 4
5 1.106$ 0.000$ 0.000$ 0.000$ 3.255# 59.89 # 635.5 " 629.3 " 378.6 " 119.3 # 52.89 # 17.78 # 5
6 0.885$ 0.000$ 0.000$ 0.000$ 3.485# 135.3 # 478.7 " 495.2 " 369.0 " 125.4 # 52.15 # 31.35 # 6
7 0.696$ 0.000$ 0.000$ 0.000$ 3.731# 128.2 # 377.5 " 416.5 " 356.0 " 122.3 # 50.65 # 47.08 # 7
8 0.580$ 0.000$ 0.000$ 0.000$ 3.996# 110.2 # 317.8 " 379.7 " 355.8 " 112.8 # 48.36 # 41.79 # 8
9 0.495$ 0.000$ 0.000$ 0.000$ 3.856# 110.1 # 271.2 " 459.0 " 349.0 " 104.2 # 45.53 # 35.15 # 9
10 0.423$ 0.000$ 0.000$ 0.000$ 3.771# 189.6 # 232.1 " 568.0 " 329.3 " 98.54 # 42.39 # 29.51 # 10
11 0.360$ 0.000$ 0.000$ 0.000$ 3.697# 251.6 " 199.3 " 490.8 " 314.7 " 95.74 # 40.27 # 23.80 # 11
12 0.295$ 0.000$ 0.000$ 0.000$ 3.658# 196.1 " 176.0 " 413.6 " 286.8 " 92.59 # 39.07 # 19.82 # 12
13 0.244$ 0.000$ 0.000$ 0.000$ 3.557# 150.5 # 185.1 " 373.2 " 271.8 " 96.20 # 38.01 # 16.82 # 13
14 0.194$ 0.000$ 0.000$ 0.000$ 3.620# 123.3 # 188.3 " 407.8 " 263.8 " 144.1 # 37.44 # 14.41 # 14
15 0.153$ 0.000$ 0.000$ 0.000$ 3.376$ 110.8 # 277.3 " 398.4 " 236.1 " 182.1 " 35.98 # 12.83 # 15
16 0.220$ 0.000$ 0.000$ 0.000$ 2.308$ 104.2 # 284.4 " 360.9 " 217.6 " 150.6 # 34.23 # 12.84 # 16
17 0.828$ 0.000$ 0.000$ 0.000$ 1.600$ 97.85 # 288.7 " 359.1 " 220.1 " 126.8 # 31.99 # 12.26 # 17
18 1.906$ 0.000$ 0.000$ 0.000$ 1.194$ 162.0 # 254.0 " 339.8 " 207.2 " 114.0 # 30.21 # 9.488# 18
19 1.517$ 0.000$ 0.000$ 0.000$ 1.153$ 271.4 " 231.9 " 304.6 " 194.4 " 107.6 # 29.89 # 9.037# 19
20 1.532$ 0.000$ 0.000$ 0.000$ 2.736$ 286.3 " 205.4 " 279.8 " 182.8 " 98.27 # 29.75 # 7.701# 20
21 1.422$ 0.000$ 0.000$ 0.000$ 2.464$ 253.8 " 299.9 " 274.7 " 172.5 " 93.84 # 29.60 # 6.333# 21
22 1.118$ 0.000$ 0.000$ 0.000$ 2.248$ 215.3 " 574.7 " 285.9 " 163.1 " 92.09 # 29.07 # 5.137# 22
23 0.830$ 0.000$ 0.000$ 0.000$ 2.038$ 183.2 " 549.2 " 268.7 " 154.8 " 87.22 # 28.80 # 4.218# 23
24 0.565$ 0.000$ 0.000$ 0.000$ 1.917$ 153.7 " 442.8 " 245.7 " 148.1 " 87.22 # 27.91 # 3.541# 24
25 0.355$ 0.000$ 0.000$ 0.000$ 33.90 # 133.8 # 426.4 " 226.2 " 141.7 # 101.9 # 28.62 # 2.971$ 25
26 0.221$ 0.000$ 0.000$ 0.000$ 42.49 # 122.8 # 728.0 " 209.3 " 134.9 # 92.15 # 33.47 # 2.560$ 26
27 0.139$ 0.000$ 0.000$ 0.625$ 32.36 # 166.8 # 592.3 " 202.2 " 129.6 # 83.36 # 35.93 # 2.343$ 27
28 0.084$ 0.000$ 0.000$ 2.974$ 24.78 # 190.8 " 452.5 " 273.6 " 125.0 # 76.50 # 33.25 # 2.324$ 28
29 0.046$ 0.000$ 3.038$ 24.67 # 162.4 " 393.2 " 606.8 " 119.6 # 71.82 # 29.64 # 2.122$ 29
30 0.023$ 0.000$ 2.743$ 40.40 # 142.6 # 366.2 "1465 & 119.5 # 68.38 # 26.34 # 1.916$ 30
31 0.011$ 0.000$ 36.87 # 337.7 " 836.9 " 64.05 # 1.750$ 31
Mean 0.753$ 0.000$ 0.000$ 0.313$ 9.822$ 144.1 # 395.5 " 426.4 & 260.9 # 105.3 # 38.98 # 14.81 $
Median 0.565$ 0.000$ 0.000$ 0.000$ 3.485$ 138.9 # 337.7 " 379.7 & 228.1 # 101.9 # 35.95 # 12.83 $
Maximum 2.288$ 0.004$ 0.000$ 3.038$ 42.49 $ 286.3 #1166 "1465 & 584.4 # 182.1 # 60.21 # 47.08 $
Minimum 0.011$ 0.000$ 0.000$ 0.000$ 1.153$ 21.54 # 153.8 " 202.2 & 119.5 # 64.05 # 26.34 # 1.750$
Total 23.34$ 0.01$ 0.00$ 9.38$ 304.5 $ 4323 #12259 "13217 & 7827 # 3264 # 1169 # 459.0 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 117.4 & " ... Relative Uncertainty +/-10%
Ann. Median 29.75 & # ... Relative Uncertainty +/-15%
Annual Total 42857 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1465 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2019
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.583$ 0.758$ 0.000$ 0.000$ 2.509$ 1.953$ 224.4 " 120.4 # 368.4 " 100.7 # 90.42 # 9.026# 1
2 1.362$ 0.547$ 0.000$ 0.000$ 1.901$ 1.848$ 199.4 " 113.5 # 436.8 " 98.41 # 95.02 # 8.661# 2
3 1.193$ 0.378$ 0.000$ 0.000$ 1.803$ 1.787$ 170.3 " 109.5 # 463.4 " 95.20 # 90.94 # 8.205# 3
4 1.018$ 0.241$ 0.000$ 0.000$ 2.036$ 1.787$ 190.4 " 115.2 # 420.6 " 180.8 # 79.52 # 7.406# 4
5 0.875$ 0.152$ 0.000$ 0.000$ 1.954$ 1.784$ 396.9 " 124.6 # 366.5 " 231.9 " 69.94 # 6.684# 5
6 0.766$ 0.095$ 0.000$ 0.000$ 3.047$ 2.677$ 440.3 " 186.2 " 316.3 " 192.2 " 61.72 # 5.967# 6
7 0.674$ 0.055$ 0.000$ 0.000$ 5.976# 30.81 # 383.7 " 189.2 " 279.3 " 155.5 " 54.24 # 5.896# 7
8 0.552$ 0.031$ 0.000$ 0.000$ 4.554# 53.08 # 374.5 " 164.3 " 247.9 " 133.7 # 48.12 # 7.315# 8
9 0.442$ 0.015$ 0.000$ 0.000$ 4.273# 60.29 # 397.3 " 148.6 " 219.9 " 118.9 # 42.81 # 6.542# 9
10 0.350$ 0.006$ 0.000$ 0.000$ 3.502$ 78.70 # 350.0 " 135.8 # 196.7 " 110.8 # 39.57 # 5.819# 10
11 0.278$ 0.002$ 0.000$ 0.000$ 2.537$ 132.1 # 296.8 " 125.4 # 178.8 " 104.4 # 36.23 # 5.227# 11
12 0.209$ 0.001$ 0.000$ 0.000$ 2.115$ 162.1 " 250.6 " 116.9 # 167.7 " 98.46 # 32.49 # 4.677# 12
13 0.158$ 0.000$ 0.000$ 0.000$ 1.872$ 166.2 " 212.4 " 113.3 # 165.3 " 91.98 # 28.94 # 4.262# 13
14 0.124$ 0.000$ 0.000$ 0.000$ 1.695$ 165.8 " 184.9 " 134.4 # 158.9 " 93.30 # 25.74 # 3.705# 14
15 0.089$ 0.000$ 0.000$ 0.000$ 1.697$ 160.2 " 165.7 " 216.6 " 150.6 " 89.82 # 22.78 # 3.214# 15
16 0.065$ 0.000$ 0.000$ 0.000$ 3.605$ 151.6 " 151.7 " 202.0 " 141.4 # 84.43 # 20.90 # 2.783$ 16
17 0.047$ 0.000$ 0.000$ 0.000$ 6.121# 137.8 # 140.5 # 260.5 " 133.3 # 80.56 # 18.62 # 2.447$ 17
18 0.031$ 0.000$ 0.000$ 0.000$ 5.863# 124.2 # 136.3 # 265.9 " 128.4 # 76.18 # 17.43 # 2.198$ 18
19 0.019$ 0.000$ 0.000$ 0.000$ 5.046# 107.1 # 140.2 # 221.0 " 144.2 # 72.05 # 16.60 # 2.004$ 19
20 0.011$ 0.000$ 0.000$ 0.000$ 4.789# 94.03 # 211.6 " 189.4 " 149.3 " 69.13 # 15.43 # 1.797$ 20
21 0.007$ 0.000$ 0.000$ 0.000$ 4.469# 85.01 # 252.4 " 168.2 " 137.9 # 66.14 # 14.96 # 1.628$ 21
22 0.010$ 0.000$ 0.000$ 0.000$ 4.170# 84.80 # 233.4 " 155.5 " 128.3 # 62.95 # 14.82 # 1.474$ 22
23 0.179$ 0.000$ 0.000$ 0.511$ 3.735# 235.1 # 209.8 " 199.0 " 119.4 # 60.66 # 14.31 # 1.319$ 23
24 1.234$ 0.000$ 0.000$ 2.633$ 3.549# 317.8 " 195.3 " 227.0 " 112.2 # 60.39 # 13.26 # 1.153$ 24
25 1.838$ 0.000$ 0.000$ 2.849$ 3.189# 259.7 " 219.4 " 189.3 " 107.2 # 58.95 # 12.87 # 0.997$ 25
26 1.695$ 0.000$ 0.000$ 2.195$ 2.932$ 212.7 " 199.3 " 164.8 " 103.4 # 56.23 # 12.54 # 0.856$ 26
27 1.862$ 0.000$ 0.000$ 1.425$ 2.698$ 215.8 " 181.7 " 150.2 " 101.3 # 54.78 # 12.12 # 0.731$ 27
28 1.650$ 0.000$ 0.000$ 0.985$ 2.532$ 248.6 " 165.8 " 139.9 # 98.49 # 51.09 # 10.90 # 0.613$ 28
29 1.414$ 0.000$ 0.789$ 2.376$ 240.3 " 150.5 " 134.2 # 94.81 # 47.91 # 9.930# 0.526$ 29
30 1.229$ 0.000$ 1.135$ 2.227$ 215.7 " 139.1 # 232.7 " 92.36 # 49.97 # 9.241# 0.445$ 30
31 1.008$ 0.000$ 2.055$ 129.1 # 331.9 " 74.12 # 0.364$ 31
Mean 0.709$ 0.081$ 0.000$ 0.417$ 3.252$ 125.0 $ 228.8 # 172.4 # 197.6 # 94.25 # 34.41 # 3.676$
Median 0.552$ 0.000$ 0.000$ 0.000$ 2.932$ 128.2 $ 199.4 # 164.3 # 150.0 # 84.43 # 21.84 # 2.783$
Maximum 1.862$ 0.758$ 0.000$ 2.849$ 6.121$ 317.8 $ 440.3 # 331.9 # 463.4 # 231.9 # 95.02 # 9.026$
Minimum 0.007$ 0.000$ 0.000$ 0.000$ 1.695$ 1.784$ 129.1 # 109.5 # 92.36 # 47.91 # 9.241# 0.364$
Total 21.97 $ 2.280$ 0.000$ 12.52 $ 100.8 $3751 $7094 #5345 #5929 #2922 #1032 # 113.9 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 72.12 $ " ... Relative Uncertainty +/-10%
Ann. Median 6.684$ # ... Relative Uncertainty +/-15%
Annual Total 26325 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 463.4 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2020
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.296$ 0.000$ 0.000$ 0.000$ 0.000$ 38.18 # 169.6 " 286.4 " 223.9 " 148.9 " 65.41 # 35.53 # 1
2 0.269$ 0.000$ 0.000$ 0.000$ 0.000$ 41.54 # 141.5 # 265.5 " 280.0 " 143.9 " 81.73 # 32.87 # 2
3 0.261$ 0.000$ 0.000$ 0.000$ 0.000$ 42.38 # 120.5 # 361.3 " 274.4 " 142.0 # 83.50 # 29.88 # 3
4 0.223$ 0.000$ 0.000$ 0.000$ 0.000$ 40.63 # 106.0 # 401.4 " 241.2 " 133.6 # 80.46 # 27.28 # 4
5 0.178$ 0.000$ 0.000$ 0.000$ 0.000$ 38.11 # 105.1 # 514.6 " 221.0 " 125.3 # 70.62 # 25.47 # 5
6 0.138$ 0.000$ 0.000$ 0.000$ 0.000$ 35.87 # 253.8 # 396.5 " 270.2 " 117.2 # 61.54 # 24.89 # 6
7 0.106$ 0.000$ 0.000$ 0.000$ 0.000$ 35.23 # 427.3 " 335.7 " 762.5 " 114.0 # 53.25 # 22.34 # 7
8 0.078$ 0.000$ 0.000$ 0.000$ 2.831$ 34.94 # 399.7 " 293.1 " 567.3 " 190.9 # 48.65 # 20.41 # 8
9 0.053$ 0.000$ 0.000$ 0.000$ 6.663# 33.41 # 326.2 " 270.7 " 421.6 " 206.5 " 51.58 # 17.85 # 9
10 0.033$ 0.000$ 0.000$ 0.000$ 5.484# 31.65 # 266.5 " 506.9 " 471.9 " 165.6 " 84.91 # 16.38 # 10
11 0.019$ 0.000$ 0.000$ 0.000$ 4.843# 35.75 # 214.2 " 629.5 " 449.3 " 142.9 # 88.41 # 14.31 # 11
12 0.009$ 0.000$ 0.000$ 0.000$ 4.701# 52.35 # 178.7 " 545.6 " 377.5 " 128.0 # 78.04 # 12.68 # 12
13 0.003$ 0.000$ 0.000$ 0.000$ 4.278# 55.75 # 201.6 " 421.0 " 334.9 " 117.8 # 79.44 # 11.80 # 13
14 0.001$ 0.000$ 0.000$ 0.000$ 3.213# 52.81 # 327.2 " 364.2 " 302.3 " 111.5 # 81.39 # 12.00 # 14
15 0.000$ 0.000$ 0.000$ 0.000$ 3.020$ 48.81 # 435.7 " 332.6 " 279.1 " 106.6 # 83.98 # 11.44 # 15
16 0.000$ 0.000$ 0.000$ 0.000$ 2.884$ 45.43 # 387.6 " 517.4 " 253.1 " 101.3 # 78.84 # 10.49 # 16
17 0.000$ 0.000$ 0.000$ 0.000$ 2.637$ 45.80 # 395.1 " 629.3 " 227.8 " 95.66 # 70.33 # 9.587# 17
18 0.000$ 0.000$ 0.000$ 0.000$ 2.508$ 58.55 # 374.9 " 496.8 " 207.3 " 90.78 # 64.83 # 8.781# 18
19 0.000$ 0.000$ 0.000$ 0.000$ 2.416$ 68.43 # 332.5 " 406.3 " 203.9 " 86.56 # 64.16 # 8.133# 19
20 0.000$ 0.000$ 0.000$ 0.000$ 2.379$ 66.62 # 279.3 " 363.5 " 231.9 " 83.08 # 58.72 # 7.295# 20
21 0.000$ 0.000$ 0.000$ 0.000$ 2.305$ 60.48 # 235.7 " 338.9 " 219.6 " 80.14 # 56.45 # 6.527# 21
22 0.000$ 0.000$ 0.000$ 0.000$ 2.242$ 58.05 # 212.1 " 302.9 " 208.3 " 78.71 # 50.95 # 5.722# 22
23 0.000$ 0.000$ 0.000$ 0.000$ 2.154$ 74.89 # 581.2 " 279.1 " 195.5 " 75.75 # 46.24 # 5.091# 23
24 0.000$ 0.000$ 0.000$ 0.000$ 2.553$ 73.30 # 485.8 " 259.8 " 176.4 " 71.52 # 41.66 # 4.632# 24
25 0.000$ 0.000$ 0.000$ 0.000$ 9.250# 66.01 # 365.9 " 234.5 " 161.8 " 67.86 # 37.52 # 4.211# 25
26 0.000$ 0.000$ 0.000$ 0.000$ 17.68 # 64.10 # 359.2 " 214.2 " 151.8 " 64.36 # 34.45 # 3.751# 26
27 0.000$ 0.000$ 0.000$ 0.000$ 14.24 # 73.75 # 361.1 " 200.9 " 163.5 " 60.83 # 32.35 # 3.248# 27
28 0.000$ 0.000$ 0.000$ 0.000$ 12.39 # 93.96 # 461.7 " 195.8 " 158.2 " 58.29 # 30.17 # 2.707$ 28
29 0.000$ 0.000$ 0.000$ 0.000$ 21.88 # 146.2 # 433.0 " 190.6 " 152.8 " 55.04 # 30.49 # 2.418$ 29
30 0.000$ 0.000$ 0.000$ 48.46 # 182.7 " 355.9 " 176.4 " 152.5 " 51.77 # 32.92 # 2.189$ 30
31 0.000$ 0.000$ 44.44 # 309.5 " 164.8 " 49.15 # 1.988$ 31
Mean 0.054$ 0.000$ 0.000$ 0.000$ 7.273$ 59.86 # 309.8 # 351.5 " 278.0 " 105.3 # 60.77 # 12.96 $
Median 0.000$ 0.000$ 0.000$ 0.000$ 2.831$ 52.58 # 327.2 # 335.7 " 229.9 " 101.3 # 62.85 # 10.49 $
Maximum 0.296$ 0.000$ 0.000$ 0.000$ 48.46 $ 182.7 # 581.2 # 629.5 " 762.5 " 206.5 # 88.41 # 35.53 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 31.65 # 105.1 # 164.8 " 151.8 " 49.15 # 30.17 # 1.988$
Total 1.67$ 0.00$ 0.00$ 0.00$ 225.5 $ 1796 # 9604 #10896 " 8341 " 3266 # 1823 # 401.9 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 99.33 $ " ... Relative Uncertainty +/-10%
Ann. Median 32.61 $ # ... Relative Uncertainty +/-15%
Annual Total 36355 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 762.5 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2021
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 1.772$ 0.000$ 0.000$ 0.070$ 10.75 # 124.5 # 401.9 " 633.4 " 254.6 " 197.1 " 136.5 # 35.47 # 1
2 1.527$ 0.000$ 0.000$ 0.071$ 9.096# 114.5 # 356.1 " 800.3 " 244.3 " 280.1 " 133.9 # 33.65 # 2
3 1.256$ 0.000$ 0.000$ 0.066$ 10.64 # 96.99 # 310.8 " 627.4 " 244.8 " 337.4 " 127.8 # 30.68 # 3
4 1.017$ 0.000$ 0.000$ 0.053$ 10.18 # 84.44 # 311.3 " 723.7 " 240.4 " 330.9 " 121.2 # 27.51 # 4
5 0.828$ 0.000$ 0.000$ 0.039$ 8.610# 75.08 # 394.8 " 901.7 " 223.8 " 322.0 " 115.2 # 24.12 # 5
6 0.672$ 0.000$ 0.280$ 0.026$ 7.875# 71.45 # 492.1 " 783.6 " 207.7 " 320.4 " 110.6 # 23.31 # 6
7 0.544$ 0.000$ 3.227$ 0.018$ 8.008# 80.25 # 701.9 " 562.6 " 191.5 " 283.1 " 107.3 # 20.93 # 7
8 0.437$ 0.001$ 3.091$ 0.025$ 7.984# 73.80 # 619.3 " 755.0 " 179.8 " 257.9 " 104.2 # 17.85 # 8
9 0.349$ 0.002$ 2.701$ 0.016$ 7.482# 68.68 # 534.2 "1024 " 269.3 " 243.8 " 98.34 # 15.50 # 9
10 0.275$ 0.002$ 2.436$ 0.008$ 7.418# 116.2 # 687.0 "1135 " 342.8 " 220.7 " 91.02 # 13.52 # 10
11 0.212$ 0.001$ 2.276$ 0.085$ 6.950# 183.0 " 546.9 "1040 " 309.1 " 205.3 " 85.07 # 12.54 # 11
12 0.156$ 0.000$ 2.305$ 7.037$ 7.665# 163.1 " 460.7 " 708.2 " 285.5 " 238.2 " 80.89 # 12.85 # 12
13 0.109$ 0.000$ 2.162$ 13.35 # 8.006# 133.8 # 730.7 " 585.3 " 254.4 " 239.2 " 77.19 # 13.69 # 13
14 0.072$ 0.000$ 1.977$ 8.188# 7.764# 127.9 # 762.3 " 557.7 " 231.5 " 213.6 " 73.54 # 13.08 # 14
15 0.045$ 0.000$ 1.836$ 6.142# 7.222# 137.5 # 736.0 " 506.5 " 213.9 " 192.9 " 69.53 # 12.15 # 15
16 0.026$ 0.000$ 1.626$ 4.976# 7.022# 132.7 # 601.8 " 434.3 " 290.4 " 178.4 " 66.06 # 10.96 # 16
17 0.012$ 0.000$ 1.469$ 4.147# 6.861# 118.3 # 466.9 " 393.5 " 351.3 " 165.1 " 64.41 # 10.61 # 17
18 0.004$ 0.000$ 1.294$ 3.566# 10.02 # 106.2 # 424.6 " 366.2 " 321.6 " 154.6 " 62.05 # 10.37 # 18
19 0.001$ 0.000$ 1.126$ 3.039$ 10.39 # 102.3 # 427.4 " 376.3 " 318.7 " 148.4 " 59.04 # 10.84 # 19
20 0.000$ 0.000$ 0.957$ 2.832$ 9.493# 190.0 # 449.0 " 367.5 " 300.1 " 199.4 " 54.97 # 12.05 # 20
21 0.000$ 0.000$ 0.802$ 2.646$ 8.449# 449.7 " 420.0 " 347.1 " 266.7 " 301.9 " 54.41 # 12.04 # 21
22 0.000$ 0.000$ 0.679$ 2.551$ 10.50 # 453.5 " 403.3 " 334.0 " 236.9 " 297.1 " 59.87 # 10.89 # 22
23 0.000$ 0.000$ 0.557$ 2.489$ 39.61 # 352.0 " 382.6 " 315.3 " 214.0 " 245.9 " 60.70 # 9.822# 23
24 0.000$ 0.000$ 0.450$ 2.381$ 53.97 # 276.9 " 361.1 " 290.6 " 198.0 " 205.5 " 54.91 # 8.947# 24
25 0.000$ 0.000$ 0.366$ 2.309$ 47.80 # 221.3 " 337.5 " 268.7 " 182.6 " 184.0 " 49.30 # 7.950# 25
26 0.000$ 0.000$ 0.289$ 2.200$ 42.63 # 188.0 " 310.8 " 261.4 " 172.8 " 176.7 " 45.49 # 7.074# 26
27 0.000$ 0.000$ 0.228$ 2.143$ 38.59 # 207.0 " 298.0 " 272.3 " 183.3 " 180.8 " 42.32 # 6.281# 27
28 0.000$ 0.000$ 0.177$ 2.055$ 35.54 # 613.1 " 300.4 " 256.8 " 238.7 " 173.2 " 39.81 # 5.357# 28
29 0.000$ 0.134$ 3.664$ 38.20 # 481.6 " 355.8 " 262.1 " 226.7 " 159.2 " 38.07 # 4.530# 29
30 0.000$ 0.101$ 9.018# 91.05 # 469.5 " 427.6 " 281.3 " 200.1 " 148.4 " 36.74 # 3.925# 30
31 0.000$ 0.078$ 127.9 # 457.4 " 267.4 " 140.6 # 3.487# 31
Mean 0.300$ 0.000$ 1.052$ 2.840$ 22.70 # 200.4 # 466.8 " 530.3 " 246.5 " 223.9 # 77.35 # 14.26 #
Median 0.026$ 0.000$ 0.679$ 2.345$ 9.493# 133.2 # 427.4 " 434.3 " 239.6 " 205.5 # 67.80 # 12.05 #
Maximum 1.772$ 0.002$ 3.227$ 13.35 $ 127.9 # 613.1 # 762.3 "1135 " 351.3 " 337.4 # 136.5 # 35.47 #
Minimum 0.000$ 0.000$ 0.000$ 0.008$ 6.861# 68.68 # 298.0 " 256.8 " 172.8 " 140.6 # 36.74 # 3.487#
Total 9.31$ 0.01$ 32.62$ 85.21$ 703.6 # 6013 #14470 "16439 " 7396 " 6942 # 2320 # 442.0 #
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 150.3 $ " ... Relative Uncertainty +/-10%
Ann. Median 45.49 $ # ... Relative Uncertainty +/-15%
Annual Total 54853 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1135 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2022
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 2.967$ 0.000$ 0.000$ 0.000$ 1.533$ 21.89 # 88.83 # 490.1 " 164.0 " 110.0 # 92.24 # 21.36 # 1
2 2.691$ 0.000$ 0.000$ 0.000$ 1.605$ 34.56 # 83.89 # 865.6 " 155.2 " 105.5 # 82.94 # 19.99 # 2
3 2.414$ 0.000$ 0.000$ 0.000$ 1.642$ 49.80 # 79.92 # 964.8 " 148.6 " 100.5 # 74.94 # 18.72 # 3
4 2.020$ 0.000$ 0.000$ 0.000$ 1.593$ 47.25 # 76.27 # 845.9 " 144.7 " 95.95 # 68.57 # 18.33 # 4
5 1.830$ 0.000$ 0.000$ 0.000$ 1.504$ 43.68 # 84.05 # 608.1 " 159.4 " 103.0 # 62.26 # 16.93 # 5
6 1.593$ 0.000$ 0.000$ 0.000$ 1.375$ 40.26 # 102.1 # 451.9 " 166.6 " 113.5 # 57.10 # 16.23 # 6
7 1.430$ 0.000$ 0.000$ 0.000$ 1.286$ 36.81 # 91.43 # 420.0 " 164.3 " 104.6 # 53.65 # 15.00 # 7
8 1.292$ 0.000$ 0.000$ 0.000$ 1.253$ 34.42 # 84.80 # 419.8 " 157.5 " 97.27 # 50.55 # 14.01 # 8
9 1.140$ 0.000$ 0.000$ 0.000$ 1.202$ 34.38 # 120.1 # 592.2 " 146.6 " 93.04 # 47.20 # 13.24 # 9
10 0.975$ 0.000$ 0.000$ 0.000$ 1.179$ 49.87 # 271.9 "1069 " 138.6 # 94.16 # 45.74 # 12.65 # 10
11 0.775$ 0.000$ 0.000$ 0.000$ 1.231$ 87.35 # 245.1 " 702.5 " 129.0 # 91.82 # 53.32 # 11.90 # 11
12 0.639$ 0.000$ 0.000$ 0.000$ 4.145$ 107.7 # 211.2 " 503.1 " 122.7 # 91.55 # 55.59 # 10.91 # 12
13 0.546$ 0.000$ 0.000$ 0.000$ 14.89 # 137.6 # 220.3 " 427.5 " 186.1 # 88.14 # 52.01 # 10.04 # 13
14 0.482$ 0.000$ 0.000$ 0.000$ 13.96 # 145.0 " 225.9 " 482.8 " 336.2 " 90.98 # 48.17 # 9.214# 14
15 0.426$ 0.000$ 0.000$ 0.000$ 10.18 # 132.1 # 292.6 " 448.6 " 274.0 " 106.4 # 44.75 # 8.347# 15
16 0.367$ 0.000$ 0.000$ 0.000$ 7.799# 149.5 # 299.8 " 435.3 " 223.3 " 94.10 # 41.95 # 7.529# 16
17 0.303$ 0.000$ 0.000$ 0.000$ [ ] 154.3 " 260.1 " 517.0 " 193.6 " 87.24 # 41.08 # 6.910# 17
18 0.251$ 0.000$ 0.000$ 0.000$ 6.242# 214.7 " 237.5 " 491.2 " 174.8 " 81.99 # 45.04 # 6.366# 18
19 0.211$ 0.000$ 0.000$ 0.000$ 6.845# 224.0 " 219.4 " 421.3 " 181.3 " 76.60 # 49.77 # 5.871# 19
20 0.167$ 0.000$ 0.000$ 0.000$ 7.095# 196.5 " 190.6 " 377.4 " 198.3 " 72.71 # 48.88 # 5.265# 20
21 0.132$ 0.000$ 0.000$ 0.000$ 6.868# 169.4 " 257.7 " 350.7 " 177.2 " 72.24 # 45.49 # 4.716# 21
22 0.101$ 0.000$ 0.000$ 0.000$ 7.422# 148.0 " 364.9 " 325.5 " 168.2 " 69.54 # 41.43 # 4.282# 22
23 0.077$ 0.000$ 0.000$ 0.000$ 17.49 # 146.4 " 383.9 " 293.5 " 159.4 " 66.15 # 38.14 # 3.839# 23
24 0.056$ 0.000$ 0.000$ 0.000$ 50.24 # 154.4 " 455.2 " 266.8 " 159.5 " 68.51 # 34.97 # 3.457# 24
25 0.039$ 0.000$ 0.000$ 0.000$ 46.57 # 144.1 # 417.6 " 246.1 " 160.0 " 86.46 # 33.45 # 3.306# 25
26 0.026$ 0.000$ 0.000$ 0.000$ 36.22 # 129.2 # 358.1 " 229.7 " 153.3 " 81.47 # 35.25 # 3.379# 26
27 0.017$ 0.000$ 0.000$ 0.000$ 29.64 # 118.2 # 363.3 " 214.5 " 142.3 # 74.75 # 33.46 # 3.283# 27
28 0.009$ 0.000$ 0.000$ 0.000$ 24.82 # 111.6 # 315.7 " 204.4 " 133.0 # 69.28 # 30.11 # 2.990$ 28
29 0.004$ 0.000$ 0.000$ 21.90 # 103.1 # 337.0 " 196.3 " 125.1 # 65.50 # 26.09 # 2.687$ 29
30 0.001$ 0.000$ 0.321$ 19.44 # 95.18 # 425.0 " 184.4 " 117.7 # 85.02 # 23.72 # 2.538$ 30
31 0.000$ 0.000$ 18.53 # 437.3 " 173.9 " 100.2 # 2.402$ 31
Mean 0.741$ 0.000$ 0.000$ 0.011$ 12.19 $ 108.7 # 245.2 # 458.7 " 168.7 # 88.33 # 48.60 # 9.215$
Median 0.367$ 0.000$ 0.000$ 0.000$ 6.981$ 114.9 # 245.1 # 427.5 " 159.4 # 90.98 # 46.47 # 7.529$
Maximum 2.967$ 0.000$ 0.000$ 0.321$ 50.24 $ 224.0 # 455.2 #1069 " 336.2 # 113.5 # 92.24 # 21.36 $
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 1.179$ 21.89 # 76.27 # 173.9 " 117.7 # 65.50 # 23.72 # 2.402$
Total 22.98$ 0.00$ 0.00$ 0.32$ 365.7 $ 3261 # 7602 #14219 " 5060 # 2738 # 1458 # 285.7 $
Missing Days 0 0 0 0 1 0 0 0 0 0 0 0
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 96.19 $ " ... Relative Uncertainty +/-10%
Ann. Median 31.78 $ # ... Relative Uncertainty +/-15%
Annual Total 35014 $ $ ... Relative Uncertainty +/-20%
Missing Days 1 [ ... Not Available
Maximum Minimum
Daily 1069 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2023
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 2.239$ 0.000$ 0.000$ 0.000$ 0.000$ 11.77 # 127.0 # 280.8 " 119.3 # 76.86 # 20.57 # 0.118$ 1
2 2.026$ 0.000$ 0.000$ 0.000$ 0.000$ 12.09 # 117.4 # 324.2 " 121.3 # 88.22 # 18.47 # 0.086$ 2
3 1.825$ 0.000$ 0.000$ 0.000$ 0.000$ 11.00 # 130.6 #1059 " 150.0 # 90.78 # 16.68 # 0.072$ 3
4 1.676$ 0.000$ 0.000$ 0.000$ 0.000$ 10.57 # 187.1 " 701.4 " 168.4 " 82.77 # 14.48 # 0.055$ 4
5 1.477$ 0.000$ 0.000$ 0.000$ 0.000$ 24.39 # 206.5 " 463.4 " 157.1 " 77.57 # 12.74 # 0.037$ 5
6 1.298$ 0.000$ 0.000$ 0.000$ 0.000$ 81.39 # 209.9 " 388.5 " 176.6 " 73.40 # 11.34 # 0.023$ 6
7 1.141$ 0.000$ 0.000$ 0.000$ 0.000$ 88.79 # 198.9 " 344.7 " 179.3 " 69.33 # 10.29 # 0.014$ 7
8 0.995$ 0.000$ 0.000$ 0.000$ 0.000$ 73.86 # 184.0 " 328.2 " 157.0 " 64.79 # 9.028# 0.008$ 8
9 0.879$ 0.000$ 0.000$ 0.000$ 0.000$ 67.53 # 167.4 " 334.7 " 142.5 # 61.04 # 8.127# 0.004$ 9
10 0.744$ 0.000$ 0.000$ 0.000$ 0.000$ 70.54 # 169.3 " 291.2 " 132.7 # 56.62 # 7.652# 0.002$ 10
11 0.597$ 0.000$ 0.000$ 0.000$ 0.000$ 88.80 # 200.0 " 262.4 " 123.5 # 51.57 # 7.493# 0.001$ 11
12 0.494$ 0.000$ 0.000$ 0.000$ 0.763$ 89.83 # 198.2 " 239.4 " 117.4 # 47.94 # 6.389# 0.000$ 12
13 0.411$ 0.000$ 0.000$ 0.000$ 3.499$ 155.5 # 214.2 " 217.4 " 151.0 # 45.36 # 5.880# 0.000$ 13
14 0.331$ 0.000$ 0.000$ 0.000$ 4.040# 211.1 " 234.4 " 200.3 " 278.3 " 43.42 # 5.628# 0.000$ 14
15 0.272$ 0.000$ 0.000$ 0.000$ 4.054# 207.8 " 218.8 " 211.4 " 264.1 " 41.71 # 5.430# 0.000$ 15
16 0.229$ 0.000$ 0.000$ 0.000$ 3.934# 187.8 " 190.0 " 300.8 " 228.8 " 39.69 # 5.142# 0.000$ 16
17 0.185$ 0.000$ 0.000$ 0.000$ 3.638# 210.3 " 184.9 " 327.8 " 208.7 " 36.17 # 4.657# 0.000$ 17
18 0.147$ 0.000$ 0.000$ 0.000$ 3.369# 167.5 " 213.3 " 286.9 " 181.3 " 33.80 # 4.252# 0.000$ 18
19 0.117$ 0.000$ 0.000$ 0.000$ 3.066# 143.3 # 355.0 " 249.3 " 165.7 " 32.39 # 3.726# 0.000$ 19
20 0.094$ 0.000$ 0.000$ 0.000$ 2.830$ 162.4 # 387.4 " 224.1 " 158.6 " 31.30 # 3.143$ 0.000$ 20
21 0.075$ 0.000$ 0.000$ 0.000$ 2.690$ 198.4 " 361.6 " 209.7 " 149.7 " 30.26 # 2.658$ 0.000$ 21
22 0.059$ 0.000$ 0.000$ 0.000$ 2.804$ 188.6 " 338.9 " 194.2 " 139.3 # 29.70 # 2.312$ 0.000$ 22
23 0.043$ 0.000$ 0.000$ 0.000$ 3.357# 183.8 " 287.6 " 193.0 " 128.6 # 30.92 # 1.949$ 0.000$ 23
24 0.031$ 0.000$ 0.000$ 0.000$ 7.672# 194.2 " 245.7 " 193.5 " 119.1 # 29.59 # 1.628$ 0.000$ 24
25 0.021$ 0.000$ 0.000$ 0.000$ 7.609# 197.0 " 237.6 " 174.4 " 110.5 # 27.39 # 1.251$ 0.000$ 25
26 0.012$ 0.000$ 0.000$ 0.000$ 6.182# 231.8 " 517.9 " 154.2 " 102.6 # 24.96 # 0.911$ 0.000$ 26
27 0.008$ 0.000$ 0.000$ 0.000$ 5.683# 209.6 " 617.1 " 145.9 " 95.32 # 23.08 # 0.590$ 0.000$ 27
28 0.005$ 0.000$ 0.000$ 0.000$ 5.663# 176.9 " 464.6 " 144.5 " 89.57 # 21.28 # 0.364$ 0.000$ 28
29 0.002$ 0.000$ 0.000$ 6.236# 156.2 " 400.6 " 142.7 # 83.88 # 21.06 # 0.240$ 0.000$ 29
30 0.000$ 0.000$ 0.000$ 8.041# 139.7 # 359.1 " 133.0 # 79.79 # 22.08 # 0.169$ 0.000$ 30
31 0.000$ 0.000$ 9.510# 313.2 " 124.6 # 22.39 # 0.000$ 31
Mean 0.562$ 0.000$ 0.000$ 0.000$ 3.053$ 131.7 # 265.7 # 285.3 # 149.3 # 46.05 # 6.440$ 0.014$
Median 0.229$ 0.000$ 0.000$ 0.000$ 3.066$ 155.8 # 214.2 # 239.4 # 146.1 # 39.69 # 5.286$ 0.000$
Maximum 2.239$ 0.000$ 0.000$ 0.000$ 9.510$ 231.8 # 617.1 #1059 # 278.3 # 90.78 # 20.57 $ 0.118$
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 10.57 # 117.4 # 124.6 # 79.79 # 21.06 # 0.169$ 0.000$
Total 17.43 $ 0.000$ 0.000$ 0.000$ 94.64 $3952 #8238 #8846 #4480 #1427 # 193.2 $ 0.421$
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 74.66 $ " ... Relative Uncertainty +/-10%
Ann. Median 3.726$ # ... Relative Uncertainty +/-15%
Annual Total 27249 $ $ ... Relative Uncertainty +/-20%
Maximum Minimum
Daily 1059 $ 0.000$
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2024
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 9.965# 707.1 " 394.5 " 107.5 # 46.79 # 9.118# 1
2 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 13.96 # 608.1 " 364.4 " 115.1 # 45.31 # 8.898# 2
3 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 17.00 $ 400.9 " 331.9 " 158.4 # 43.33 # 8.730# 3
4 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 16.29 $ 323.3 " 313.2 " 167.3 " 41.65 # 9.540# 4
5 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 16.50 $ 287.1 " 337.8 " 155.1 " 40.51 # 9.427# 5
6 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 17.14 $ 477.9 " 370.3 " 137.1 # 40.26 # 8.737# 6
7 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 19.57 $ 838.9 " 356.4 " 122.1 # 39.05 # 7.756# 7
8 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 22.24 $ 495.8 " 324.9 " 110.6 # 37.89 # 6.720# 8
9 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 27.15 $ 385.6 " 299.0 " 102.2 # 36.29 # 5.832# 9
10 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 47.86 # 370.7 " 278.2 " 93.82 # 34.78 # 5.075# 10
11 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 60.95 # 384.8 " 252.6 " 87.92 # 34.20 # 4.605# 11
12 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 65.84 # 464.1 " 228.1 " 83.55 # 31.07 # 4.057# 12
13 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 3.187$ 61.66 # 422.3 " 208.2 " 79.19 # 28.73 # 3.668# 13
14 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 6.303# 56.41 # 746.0 " 191.8 " 78.09 # 26.62 # 3.224# 14
15 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 6.100# 51.54 # 658.3 " 177.0 " 82.02 # 25.07 # 2.690$ 15
16 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.906# 47.28 # 472.0 " 164.2 " 81.50 # 22.96 # 2.252$ 16
17 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.669# 46.59 # 559.3 " 153.8 " 106.6 # 20.38 # 1.737$ 17
18 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.621# 93.46 #1613 & 145.9 " 96.04 # 18.39 # 1.290$ 18
19 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.708# 131.6 #1249 & 140.8 # 85.82 # 17.73 # 0.977$ 19
20 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.357# 131.4 # 775.1 " 134.3 # 83.99 # 19.36 # 0.735$ 20
21 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.263# 112.5 # 572.9 " 128.6 # 107.4 # 23.08 # 0.564$ 21
22 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 7.970# 109.4 # 522.7 " 125.0 # 105.8 # 25.22 # 0.449$ 22
23 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 9.977# 127.8 #1169 " 123.8 # 91.74 # 22.57 # 0.338$ 23
24 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 8.660# 141.7 #1195 " 122.0 # 83.26 # 19.81 # 0.243$ 24
25 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 8.097# 156.3 "1114 " 116.1 # 75.97 # 17.63 # 0.183$ 25
26 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 8.422# 176.2 " 723.5 " 110.9 # 70.31 # 15.29 # 0.130$ 26
27 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 10.14 # 157.7 " 598.6 " 113.3 # 65.05 # 14.41 # 0.090$ 27
28 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 13.28 # 250.1 " 509.8 " 116.4 # 60.76 # 13.26 # 0.061$ 28
29 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 11.78 # 537.7 " 484.0 " 111.0 # 56.60 # 11.37 # 0.044$ 29
30 0.000$ 0.000$ 0.000$ 0.000$ 10.46 # 425.6 " 486.4 " 104.8 # 52.67 # 10.00 # 0.033$ 30
31 0.000$ 0.000$ 0.000$ 377.5 " 431.0 " 49.37 # 0.024$ 31
Mean 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 4.597$ 113.8 $ 646.7 & 211.3 # 95.25 # 27.43 # 3.459$
Median 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 5.489$ 61.66 $ 522.7 & 170.6 # 87.92 # 25.15 # 2.252$
Maximum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 13.28 $ 537.7 $1613 & 394.5 # 167.3 # 46.79 # 9.540$
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 9.965$ 287.1 & 104.8 # 49.37 # 10.00 # 0.024$
Total 0.00$ 0.00$ 0.00$ 0.00$ 0.00$ 137.9 $ 3527 $20048 & 6339 # 2953 # 823.0 # 107.2 $
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 92.72 & " ... Relative Uncertainty +/-10%
Ann. Median 3.446& # ... Relative Uncertainty +/-15%
Annual Total 33935 & $ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
Maximum Minimum
Daily 1613 & 0.000&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 609022 Chapman Brook - White Elephant Year 2025
VarFrom 10.00 Stage - SL in Metres Table Type Total
VarTo 151.00 Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Day
1 0.017$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 190.3 " 508.0 " 396.8 " 193.6 " 90.36 # [ ] 1
2 0.012$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 186.6 " 826.5 " 371.7 " 180.5 " 86.03 # [ ] 2
3 0.007$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 406.4 "1298 " 346.7 " 170.4 " 79.58 # [ ] 3
4 0.005$ 0.000$ 0.000$ 0.000$ 0.000$ 30.22 $ 446.3 " 951.9 " 320.6 " 212.0 " 73.93 # [ ] 4
5 0.002$ 0.000$ 0.000$ 0.000$ 0.000$ 92.89 # 343.0 " 739.5 " 503.0 " 265.6 " 80.31 # [ ] 5
6 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 54.71 # 305.1 " 623.3 "1091 " 212.2 " 104.4 # [ ] 6
7 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 40.50 # 440.5 " 509.2 " 905.2 " 185.2 " 97.75 # [ ] 7
8 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 32.22 # 445.0 " 443.2 " 763.2 " 170.4 " 86.28 # [ ] 8
9 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 26.04 # 360.2 " 420.2 " 620.7 " 158.4 " 76.56 # [ ] 9
10 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 31.58 # 294.6 " 430.0 " 499.8 " 148.4 " 68.67 # [ ] 10
11 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 38.69 # 244.1 " 415.9 " 438.5 " 140.8 # 62.37 # [ ] 11
12 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 37.81 # 314.6 " 384.6 " 400.5 " 134.5 # 57.00 # [ ] 12
13 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 36.52 # 376.5 " 366.9 " 383.9 " 130.2 # [ ] [ ] 13
14 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 41.01 # 390.8 " 389.3 " 484.3 " 123.0 # [ ] [ ] 14
15 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 44.08 # 396.9 " 383.1 " 593.8 " 117.7 # [ ] [ ] 15
16 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 50.17 # 377.4 " 347.1 " 481.9 " 113.6 # [ ] [ ] 16
17 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 45.94 # 340.8 " 322.6 " 634.4 " 111.3 # [ ] [ ] 17
18 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 69.85 # 297.7 " 302.8 " 622.3 " 110.4 # [ ] [ ] 18
19 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 107.4 # 281.0 " 441.7 " 500.9 " 112.1 # [ ] [ ] 19
20 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 154.1 # 301.9 " 867.4 " 451.2 " 131.9 # [ ] [ ] 20
21 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 492.8 " 719.7 " 647.2 " 409.2 " 123.6 # [ ] [ ] 21
22 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 705.9 " 580.2 " 554.7 " 374.7 " 113.3 # [ ] [ ] 22
23 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 464.7 " 539.7 " 532.4 " 345.1 " 104.4 # [ ] [ ] 23
24 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 333.7 " 923.8 " 490.0 " 313.6 " 106.9 # [ ] [ ] 24
25 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 251.3 " 862.1 " 695.1 " 288.5 " 132.7 # [ ] [ ] 25
26 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 220.7 " 579.8 " 819.9 " 268.9 " 117.6 # [ ] [ ] 26
27 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 315.7 "1349 & 730.7 " 247.0 " 103.8 # [ ] [ ] 27
28 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 277.1 "1901 & 800.8 " 231.4 " 94.38 # [ ] [ ] 28
29 0.000$ 0.000$ 0.000$ 0.000$ 218.2 "1252 " 651.3 " 219.3 " 87.63 # [ ] [ ] 29
30 0.000$ 0.000$ 0.000$ 0.000$ 183.6 " 818.1 " 500.5 " 207.6 " 85.82 # [ ] [ ] 30
31 0.000$ 0.000$ 0.000$ 621.6 " 435.0 " 85.37 # [ ] 31
Mean 0.001$ 0.000$ 0.000$ 0.000$ 0.000$ 146.6 $ 544.7 & 575.1 " 457.2 " 138.0 # 80.27 # [ ]
Median 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 52.44 $ 396.9 & 508.0 " 404.8 " 123.6 # 79.94 # [ ]
Maximum 0.017$ 0.000$ 0.000$ 0.000$ 0.000$ 705.9 $1901 &1298 "1091 " 265.6 # 104.4 # [ ]
Minimum 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 0.000$ 186.6 & 302.8 " 207.6 " 85.37 # 57.00 # [ ]
Total 0.04$ 0.00$ 0.00$ 0.00$ 0.00$ 4398 $16886 &17829 "13716 " 4278 # 963.2 # [ ]
Missing Days 0 0 0 0 0 0 0 0 0 0 18 31
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 183.8 & " ... Relative Uncertainty +/-10%
Ann. Median 34.37 & # ... Relative Uncertainty +/-15%
Annual Total 58070 & $ ... Relative Uncertainty +/-20%
Missing Days 49 & ... Relative Uncertainty +/-30%
[ ... Not Available
Maximum Minimum
Daily 1901 & 0.000&