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Department of Water and Environmental Regulation HYMONTH V128 Output 13/08/2026
Site 611004 Preston River - Boyanup Bridge Site 611004
VarFrom 10.00 Stage - SL in Metres
VarTo 151.00 Total Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Mean Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Monthly Total Days Yr
1980 [ ] [ ] [ ] [ ] 501.5" 3615 "20659 $25338 $15736 " 8642 # 3117 " 800.2" [9801 ] [78409] 121 1980
1981 340.1" 237.4" 848.3# 1104 " 706.3" 6963 "21683 "40237 #17067 " 7305 " 2671 " 986.0" 8346 # 100148# 0 1981
1982 5558 " 872.8" 683.6$ 573.1$ 571.6" 5560 "16322 "12895 " 9178 " 6142 " 1058 " 339.0" 4979 $ 59753$ 0 1982
1983 117.3" 299.6" 196.6" 410.4" 829.6"20096 "39468 "59757 "68369 " 5491 " 1484 " 383.4" 16409 " 196903" 0 1983
1984 208.2# 141.3" 210.8" 396.7" 2540 "12673 "13220 "15893 #18982 # 3089 " 2902 " 676.7" 5911 # 70932# 0 1984
1985 263.5" 317.6" 341.6" 3684 " 1639 " 8264 "24151 "22492 "41601 " 3247 " 1641 " 455.1" 9008 " 108098" 0 1985
1986 178.0" 283.7" 579.4" 428.0" 923.0" 1406 " 7746 "13888 " 7421 " 4251 " 1286 " 329.3" 3227 " 38720" 0 1986
1987 160.3" 107.2" 236.6" 663.6" 1085 " 4297 #10763 # 9254 " 3936 " 1650 " 613.8" 267.7" 2753 # 33034# 0 1987
1988 108.9" 52.4" 112.3" 223.3" 1282 "43098 &32582 "35355 "24736 "18641 " 3803 " 665.5$ 13388 & 160659& 0 1988
1989 239.3# 230.3" 328.0" 460.3" 923.9" 1327 "11943 "14676 "10993 " 9617 " 1884 " 270.7" 4408 # 52893# 0 1989
1990 229.8" 186.6" 259.6" 815.0" 2506 "11966 "58222 &28495 " 9067 " 5242 " 2430 " 409.8" 9986 & 119830& 0 1990
1991 160.3" 112.5" 218.5" 485.5" 1645 "16846 "46350 "48536 &24708 " 6588 " 2514 " 471.9" 12386 & 148637& 0 1991
1992 181.5" 218.8" 333.3" 423.0" 1106 "20567 "35333 "34310 "31258 " 5030 " 2322 " 808.5" 10991 " 131890" 0 1992
1993 133.9" 70.5" 682.0" 905.5" 1024 " 1494 "19312 "25125 "24134 " 7146 " 1717 " 294.0" 6837 " 82038" 0 1993
1994 101.1" 107.7" 142.6" 232.6" 733.6" 5932 "31811 "17002 " 8395 " 2730 " 581.0" 233.6" 5667 " 68001" 0 1994
1995 100.4" 65.4" 91.5" 272.3" 806.5" 3005 "32918 "26436 "15031 " 3661 " 1184 " 642.6" 7018 " 84214" 0 1995
1996 297.1" 124.4" 219.8" 326.3" 542.1" 6287 "55217 &56202 &57652 &11500 " 2451 " 1010 " 15986 & 191829& 0 1996
1997 143.3" 169.8" 372.9" 396.2" 1184 "13355 "20450 "25266 "13749 " 4367 " 1131 " 436.6" 6752 " 81021" 0 1997
1998 163.4" 109.7" 462.6" 407.7" 810.0" 4644 " 7147 "19347 "23134 " 8972 " 1265 " 355.9" 5568 " 66819" 0 1998
1999 174.1" 260.9" 333.7" 250.1" 1784 "19891 "33554 &33687 "28372 "24842 " 2546 " 554.9" 12187 & 146249& 0 1999
2000 433.8" 213.9" 539.3" 472.3" 875.5" 1933 "43435 "33872 "24339 # 3317 " 1041 " 420.3" 9241 # 110892# 0 2000
2001 254.0" 183.4" 293.8" 329.7" 797.5" 914.4" 1102 " 3629 " 3149 " 2185 " 521.3" 911.1" 1189 " 14269" 0 2001
2002 185.4" 114.8" 194.8" 365.4" 1090 " 4240 "21923 "19190 "13883 " 4760 " 1527 " 304.4" 5648 " 67777" 0 2002
2003 146.5" 216.7" 193.8" 395.6" 654.5" 3575 "19241 "21109 "19072 " 5574 " 1169 " 317.8" 5972 " 71667" 0 2003
2004 190.9" 122.8" 197.4" 331.1" 685.4"11972 "16045 "25958 " 8615 " 2899 " 999.1" 336.4" 5696 " 68351" 0 2004
2005 181.8" 161.6" 230.4" 589.1" 3879 "12495 "12203 "28739 "29462 "12530 " 2700 " 968.0" 8678 " 104139" 0 2005
2006 448.2" 306.6" 335.9" 409.7" 539.4" 563.4" 1165 "14895 " 6701 " 1950 " 500.2" 274.2" 2341 " 28088 " 0 2006
2007 246.9" 177.7" 285.9" 372.3" 544.7" 603.0"12104 "28016 "25969 " 7375 " 1169 " 415.5" 6440 " 77279 " 0 2007
2008 240.8" 210.1" 266.8" 484.3" 831.0" 2410 "16145 "12057 " 3477 " 2606 " 1332 " 547.5" 3384 " 40608 " 0 2008
2009 202.2" 211.5" 301.5" 278.9" 434.1" 7017 "35521 "27829 "24845 " 5586 " 1331 " 463.1" 8668 "104019 " 0 2009
2010 251.3" 234.3" 270.3" 426.4" 451.5# 628.3" 1387 " 1565 " 896.0" 440.8" 321.9" 220.8" 591.2# 7094 # 0 2010
2011 218.4" 168.9" 168.9" 266.0" 449.7" 978.8" 6599 "39270 &13239 " 5163 " 1952 " 587.2" 5755 & 69061& 0 2011
2012 288.6" 267.7" 244.3" 316.9" 501.0" 1982 " 2645 " 5960 "10385 " 4041 " 869.3" 1460 " 2413 " 28962" 0 2012
2013 296.9" 174.9" 348.6" 339.6" 750.1" 1004 " 9432 "35024 &50313 & 9704 " 1335 " 637.4" 9113 & 109360& 0 2013
2014 367.5" 221.2" 267.5" 326.6" 3040 " 6374 "27564 "31396 &23049 " 4750 " 1157 " 589.9" 8259 & 99103& 0 2014
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
" ... Relative Uncertainty +/-10%
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
Department of Water and Environmental Regulation HYMONTH V128 Output 13/08/2026
Site 611004 Preston River - Boyanup Bridge Site 611004
VarFrom 10.00 Stage - SL in Metres
VarTo 151.00 Total Stream Discharge Volume in Megalitres
Figures are for period ending 24:00
Mean Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Monthly Total Days Yr
2015 337.1" 258.2" 368.1" 594.2" 693.3" 809.9" 1283 " 5240 " 5539 " 1109 " 510.9" 279.0" 1419 " 17022" 0 2015
2016 429.3" 318.4" 410.4" 613.6" 1636 " 4601 "19288 "27600 "15435 "12089 " 1660 " 527.1" 7051 " 84608" 0 2016
2017 338.1" 403.4" 417.5" 356.2" 587.8" 659.9" 4181 "37743 & 6057 " 3304 " 880.4" 463.4" 4616 & 55391& 0 2017
2018 353.9" 255.6" 342.8" 471.2" 570.3" 2278 "28167 "34211 "10315 " 3168 " 917.5" 527.3" 6798 " 81578" 0 2018
2019 368.5" 302.3" 431.1" 476.9" 553.1" 1113 " 3311 " 3370 "12592 " 1386 " 682.6" 277.1" 2072 " 24863" 0 2019
2020 216.4" 206.3" 299.7" 325.8" 471.3" 1591 "16614 "11708 "17138 " 3461 " 1306 " 449.7" 4482 " 53786" 0 2020
2021 244.3" 409.4" 510.9" 600.2" 981.3" 3179 "27541 "28156 "11127 " 8772 " 2281 " 598.4" 7033 " 84401" 0 2021
2022 336.4" 268.5" 376.3" 450.3" 651.0" 873.4"10130 "24546 " 5191 " 1928 " 944.2" 466.0" 3847 " 46162" 0 2022
2023 351.2" 316.8" 366.0# 494.9" 498.7" 664.2" 1512 " 8965 " 5704 " 1400 " 405.0" 268.0" 1745 # 20946# 0 2023
2024 291.2" 191.6" 185.1" 190.1" 328.8" 1029 " 4419 "31748 " 8745 " 2561 " 1709 " 491.0" 4324 " 51889" 0 2024
2025 265.2" 209.9" 292.6" 398.6" 497.6" 703.3" 9808 "33570 "17553 " 3671 " 1161 " 549.7" 5723 " 68680" 0 2025
2026 319.0 " 235.5 " 339.3 " 428.2 " 435.5 " 983.3 "4705 "[1281 ] [ ] [ ] [ ] [ ] [1091 ][8727 ] 142 2026
Mean 362.2# 224.6" 329.0$ 512.2$ 990.9# 6095 &19071 &[24273 ]17963 & 5737 # 1500 " 516.1$ [6494 ][76996 ] Mean
Med. 242.6# 212.7" 300.6$ 410.0$ 750.1# 3179 &16322 &[25338 ]14457 & 4558 # 1296 " 463.2$ Med.
Max 5558 # 872.8" 848.3$ 3684 $ 3879 #43098 &58222 &[59757 ]68369 &24842 # 3803 " 1460 $ [16409 ][196903 ] Max
Min 100.4# 52.4" 91.5$ 190.1$ 328.8# 563.4& 1102 &[1281 ] 896.0& 440.8# 321.9" 220.8$ [591.2] [7094 ] Min
Total 16662# 10330" 15133$ 23562$ 46570# 286461& 896324&1140838] 826306& 263883# 68986" 23742$ [305197][3618798] 263 Total
OK 100% 100% 100% 100% 100% 100% 100% 99% 100% 100% 100% 100% 100% 100% OK
Cnt 46 46 46 46 47 47 47 47 46 46 46 46 47 47 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
" ... Relative Uncertainty +/-10%
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available