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Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 616234 Bayswater Main Drain - Bassendean Road 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 [ ] 4.562$ 5.783# 8.572# 4.119$ 9.752# 11.29 # 25.36 # 14.38 # 10.43 # 6.519# 6.759# 1
2 [ ] 4.203$ 4.031$ 6.161# 3.980$ 4.562# 11.36 # 23.25 # 15.89 # 14.29 # 6.652# 5.610# 2
3 [ ] 4.296$ 4.073$ 5.537# 3.905$ 4.151$ 26.35 # 20.08 # 29.70 # 14.19 # 6.419# 5.188# 3
4 [ ] 4.600# 3.633$ 5.120# 3.774$ 65.53 & 24.83 # 17.96 # 18.40 # 10.05 # 6.373# 5.646# 4
5 [ ] 4.534# 5.394$ 4.865# 3.782$ 84.89 $ 23.33 # 17.40 # 16.33 # 9.583# 7.919# 6.360# 5
6 [ ] 4.441# 3.882$ 7.079# 4.178$ 45.21 # 16.69 # 23.49 # 17.01 # 9.701# 8.253# 5.846# 6
7 [ ] 4.432# 3.544$ 4.690# 5.785$ 32.93 # 13.70 # 17.42 # 18.14 # 9.467# 6.846# 6.203# 7
8 [ ] 4.428# 3.648$ 4.486# 3.901$ 23.25 # 13.86 # 18.44 # 16.38 # 9.582# 6.601# 5.917# 8
9 [ ] 4.691# 3.698$ 4.507# 6.608$ 17.57 # 12.66 # 16.22 # 13.84 # 13.47 # 6.162# 4.996# 9
10 [ ] 4.724# 5.147$ 5.932# 5.143# 35.03 # 12.68 # 17.18 # 13.31 # 9.445# 5.985# 4.641# 10
11 [ ] 4.659# 3.522$ 5.054# 4.038$ 32.96 # 12.16 # 21.92 # 13.22 # 8.533# 5.947# 5.032# 11
12 [ ] 4.538$ 3.234$ 4.935# 3.879$ 19.70 # 17.08 # 14.68 # 16.04 # 8.324# 6.088# 5.946# 12
13 [ ] 4.604# 3.190$ 8.353# 7.414$ 20.70 # 14.18 # 13.87 # 42.70 # 7.969# 8.173# 5.380# 13
14 [ ] 4.475$ 3.250$ 6.557# 4.254$ 37.53 # 13.28 # 13.47 # 20.39 # 7.821# 7.472# 5.320# 14
15 [ ] 4.227$ 3.131$ 4.739# 4.084$ 22.00 # 11.78 # 39.34 # 17.23 # 11.03 # 6.558# 5.300# 15
16 [ ] 3.810$ 4.816$ 5.289# 3.960$ 20.37 # 11.44 # 46.70 # 15.53 # 9.195# 5.998# 5.244# 16
17 [ ] 5.090$ 3.975$ 4.538# 3.888$ 16.88 # 14.85 # 20.91 # 19.43 # 8.185# 5.764# 5.248# 17
18 [ ] 4.306$ 3.300$ 4.380# 3.814$ 15.51 # 22.95 # 18.41 # 16.04 # 7.796# 5.612# 4.999# 18
19 [ ] 3.876$ 3.061$ 4.349# 3.794$ 14.98 # 44.01 # 17.46 # 13.75 # 7.685# 5.654# 5.082# 19
20 [ ] 4.818$ 3.039$ 6.977# 3.744$ 24.95 # 15.89 # 17.48 # 13.10 # 7.970# 5.661# 5.087# 20
21 [ ] 4.521$ 3.160$ 4.504# 3.652$ 25.69 # 26.95 # 23.15 # 12.68 # 8.542# 5.723# 5.053# 21
22 [ ] 3.982$ 3.366$ 4.328# 3.612$ 19.31 # 16.23 # 16.74 # 17.86 # 11.60 # 7.583# 5.004# 22
23 [ ] 3.919$ 3.564$ 4.266# 3.676$ 20.32 # 20.50 # 15.93 # 13.49 # 8.890# 6.180# 4.718# 23
24 [ ] 3.867$ 4.826$ 4.652$ 8.170$ 17.15 # 16.56 # 15.19 # 12.22 # 7.743# 5.744# 4.775# 24
25 [ ] 5.471# 3.115$ 5.193$ 4.455$ 17.14 # 21.44 # 18.30 # 11.97 # 7.385# 5.508# 5.268# 25
26 4.482# 4.232$ 3.027$ 5.827# 3.781$ 15.56 # 59.23 # 16.75 # 11.43 # 7.162# 5.306# 5.195# 26
27 4.527# 4.035$ 2.612$ 4.378# 3.784$ 14.48 # 38.54 # 16.43 # 12.35 # 6.874# 5.216# 5.195# 27
28 4.673# 4.211# 2.715$ 4.131$ 3.801$ 12.38 # 22.98 # 16.35 # 16.12 # 6.952# 5.270# 5.702# 28
29 4.744# 2.819$ 7.107$ 3.764$ 11.86 # 27.29 # 14.93 # 11.16 # 10.12 # 5.168# 5.209# 29
30 4.654# 3.462$ 4.477# 3.828$ 11.60 # 19.92 # 14.54 # 10.75 # 7.272# 6.040# 5.188# 30
31 5.046# 37.53 $ 11.26 $ 18.47 # 13.68 # 6.717# 5.159# 31
Mean 4.688# 4.413$ 4.760$ 5.366$ 4.575$ 23.80 & 20.40 # 19.45 # 16.36 # 9.161# 6.280# 5.364#
Median 4.664# 4.437$ 3.522$ 4.900$ 3.901$ 19.50 & 16.69 # 17.42 # 15.71 # 8.542# 6.064# 5.209#
Maximum 5.046# 5.471$ 37.53 $ 8.572$ 11.26 $ 84.89 & 59.23 # 46.70 # 42.70 # 14.29 # 8.253# 6.759#
Minimum 4.482# 3.810$ 2.612$ 4.131$ 3.612$ 4.151& 11.29 # 13.47 # 10.75 # 6.717# 5.168# 4.641#
Total 28.13 # 123.6 $ 147.5 $ 161.0 $ 141.8 $ 713.9 & 632.5 # 603.0 # 490.8 # 284.0 # 188.4 # 166.3 #
Missing Days 25 0 0 0 0 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 10.83 & # ... Relative Uncertainty +/-15%
Ann. Median 6.579& $ ... Relative Uncertainty +/-20%
Annual Total 3681 & & ... Relative Uncertainty +/-30%
Missing Days 25 [ ... Not Available
Maximum Minimum
Daily 84.89 & 2.612&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 616234 Bayswater Main Drain - Bassendean Road 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 5.070# 4.505# 3.822$ 3.837& 3.673$ 5.721# 7.004# 31.01 # 22.83 # 16.25 # [ ] 12.47 & 1
2 5.168# 4.444# 3.548$ 3.568& 3.072$ 84.65 $ 7.305# 19.44 # 22.28 # 41.59 # [ ] 11.98 & 2
3 5.022# 4.446# 3.618$ 3.188& 2.996$ 11.99 # 6.634# 17.62 # 22.36 # 29.55 # [ ] 10.44 & 3
4 5.039# 4.374# 3.536$ 3.291& 2.805$ 7.094# 6.505# 16.72 # 29.78 # 26.67 # [ ] 9.816& 4
5 4.927# 4.277# 3.492$ 3.351& 2.632$ 6.068# 6.532# 16.20 # 46.01 # 20.19 # [ ] 9.474& 5
6 4.874# 4.359$ 3.488$ 3.258& 2.855$ 47.77 $ 6.690# 15.86 # 28.60 # 18.91 # [ ] 9.290& 6
7 4.668# 3.947$ 3.547$ 3.199& 2.538$ 30.41 # 10.26 # 72.97 $ 22.61 # 17.96 # [ ] 9.073& 7
8 4.580# 3.866$ 4.224& 3.235& 2.470$ 11.31 # 7.851# 27.69 # 22.09 # 17.16 # [ ] 8.528& 8
9 5.006# 3.947$ 3.404& 3.153& 2.531$ 15.32 # 12.51 # 22.69 # 22.14 # 16.36 # [ ] 8.352& 9
10 4.806# 4.518# 3.374& 3.117& 2.603$ 13.70 # 27.95 # 20.45 # 21.48 # 16.10 # [ ] 8.231& 10
11 4.680# 4.378# 3.575& 3.157& 2.693$ 9.511# 11.37 # 23.94 # 19.19 # [ ]U [ ] 8.049& 11
12 4.556# 4.229# 3.739& 3.199& 2.531$ 8.244# 9.706# 20.09 # 18.31 # [ ] [ ] 8.316& 12
13 4.613# 3.949$ 3.755& 3.361& 2.557$ 7.475# 9.198# 21.58 # 18.18 # [ ] [ ] 8.263& 13
14 4.707# 3.771$ 3.688& 3.446& 2.462$ 7.409# 9.338# 32.63 # 25.80 # [ ] [ ] 11.73 & 14
15 4.654# 3.879$ 3.867& 3.438& 2.412$ 6.952# 8.975# 25.45 # 19.21 # [ ] [ ] 10.38 & 15
16 5.044# 3.930$ 3.920& 3.017& 2.265$ 6.371# 8.504# 21.61 # 17.52 # [ ] [ ] 7.942& 16
17 4.989# 4.031$ 3.955& 2.651$ 2.308$ 5.972# 20.05 # 44.83 # 17.43 # [ ] [ ] 7.538& 17
18 5.117# 3.788$ 3.857& 2.605$ 2.220$ 7.018# 44.75 # 42.39 # 16.92 # [ ] [ ] 7.582& 18
19 5.162# 3.815$ 3.791& 2.564$ 2.038$ 6.350# 22.72 # 26.62 # 16.90 # [ ] [ ] 7.168& 19
20 5.417# 3.949$ 3.905& 2.453$ 2.022$ 6.668# 13.89 # 26.02 # 17.04 # [ ] [ ] 7.059& 20
21 5.399# 3.906$ 4.094& 2.510$ 2.002$ 9.681# 13.93 # 30.48 # 22.42 # [ ] 12.04 & 7.013& 21
22 5.346# 3.817$ 3.970& 2.550$ 1.990$ 8.519# 13.88 # 29.93 # 20.90 # [ ] 11.45 & 6.730& 22
23 5.242# 4.025$ 3.810& 2.438$ 1.954$ 7.193# 31.06 # 32.07 # 17.38 # [ ] 11.76 & 6.735& 23
24 5.267# 4.106$ 3.553& 2.494$ 2.005$ 6.738# 16.45 # 41.99 # 17.00 # [ ] 11.44 & 6.718& 24
25 5.198# 3.620$ 3.706& 2.418$ 2.879$ 6.647# 32.87 # 27.83 # 16.69 # [ ] 10.64 & 6.905& 25
26 4.905# 3.709$ 3.773& 2.529$ 2.375$ 8.491# 25.86 # 25.15 # 16.68 # [ ] 10.21 & 6.815& 26
27 5.231# 3.539$ 3.738& 2.565$ 2.260$ 21.03 # 17.11 # 29.16 # 30.69 # [ ] 10.25 & 6.798& 27
28 5.132# 3.408$ 3.869& 2.535$ 8.696$ 11.02 # 30.98 # 24.89 # 23.75 # [ ] 11.27 & 6.961& 28
29 5.061# 3.500$ 4.045& 2.525$ 19.86 # 7.967# 32.89 # 25.50 # 16.59 # [ ] 11.19 & 7.277& 29
30 4.950# 4.025& 4.148$ 15.90 # 7.228# 20.85 # 28.30 # 15.85 # [ ] 15.57 & 6.910& 30
31 4.587# 3.933& 7.878# 25.59 # 23.41 # [ ] 7.139& 31
Mean 4.981# 4.001$ 3.762& 2.993& 3.854$ 13.35 $ 16.75 # 27.89 $ 21.49 # 22.07 # 11.58 & 8.312&
Median 5.022# 3.947$ 3.773& 3.135& 2.531$ 7.721$ 13.88 # 25.50 $ 20.06 # 18.44 # 11.36 & 7.942&
Maximum 5.417# 4.518$ 4.224& 4.148& 19.86 $ 84.65 $ 44.75 # 72.97 $ 46.01 # 41.59 # 15.57 & 12.47 &
Minimum 4.556# 3.408$ 3.374& 2.418& 1.954$ 5.721$ 6.505# 15.86 $ 15.85 # 16.10 # 10.21 & 6.718&
Total 154.4 # 116.0 $ 116.6 & 89.80 & 119.5 $ 400.5 $ 519.2 # 864.5 $ 644.7 # 220.7 # 115.8 & 257.7 &
Missing Days 0 0 0 0 0 0 0 0 0 21 20 0
Summaries ------------------ Notes -------------------
--------- All recorded data is continuous and reliable
except where the following tags are used...
Annual Mean 11.14 & # ... Relative Uncertainty +/-15%
Ann. Median 6.738& $ ... Relative Uncertainty +/-20%
Annual Total 3619 & & ... Relative Uncertainty +/-30%
Missing Days 41 U ... Unrateable
[ ... Not Available
Maximum Minimum
Daily 84.65 & 1.954&
Department of Water and Environmental Regulation HYDAY V146 Output 14/11/2025
Site 616234 Bayswater Main Drain - Bassendean Road 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 9.093& 4.382& 3.321$ 3.603$ 4.125! 5.692! 7.791$ 18.47 $ 31.24 $ 34.64 $ 23.14 $ [ ] 1
2 6.237& 4.416& 3.430$ 3.666$ 3.786! 19.33 ! 8.734$ 37.36 $ 28.01 $ 24.99 $ 21.94 $ [ ] 2
3 5.340& 4.573& 3.483$ 3.633$ 4.004! 18.81 ! 25.67 $ 59.78 $ 28.36 $ 23.69 $ 22.90 $ [ ] 3
4 4.941& 4.177& 3.297$ 3.895$ 3.528! 25.50 ! 14.82 $ 33.46 $ 26.39 $ 28.19 $ 21.96 $ [ ] 4
5 4.782& 4.102& 3.197$ 3.855$ 3.576! 17.14 ! 9.642$ 27.24 $ 61.93 $ 29.85 $ 22.64 $ [ ] 5
6 4.681& 3.982& 3.264$ 4.000$ 3.634! 8.408! 15.43 $ 24.59 $ 69.42 $ 26.22 $ 20.31 $ [ ] 6
7 5.094& 4.155& 3.388$ 3.912$ 3.538! 6.859! 14.30 $ 22.55 $ 51.75 $ 34.94 $ 24.67 & [ ] 7
8 5.297& 3.894& 3.395$ 3.824$ 3.409! 6.212! 10.56 $ 25.71 $ 37.98 # 25.43 $ 14.26 $ [ ] 8
9 5.244& 3.801& 3.251$ 3.718$ 3.418! 5.617! 8.811$ 53.60 $ 33.67 # 23.22 $ 12.91 $ [ ] 9
10 5.398& 3.708& 3.300$ 3.879$ 3.508! 5.497! 8.876$ 53.86 # 32.10 $ 22.62 $ 12.42 $ [ ] 10
11 6.354& 3.661& 3.468$ 4.043$ 3.482! 5.086! 8.282$ 30.32 $ 30.87 $ 22.27 $ 12.39 $ [ ] 11
12 6.054& 3.658& 3.501$ 4.167$ 3.356! 4.885! 30.94 $ 26.18 $ 41.06 # 21.92 $ 12.29 $ [ ] 12
13 5.222& 3.616& 11.63 $ 4.539$ 3.273! 4.781! 14.79 $ 34.49 $ 42.01 # 22.05 $ [ ] [ ] 13
14 5.153& 3.561& 8.639$ 3.704$ 3.086! 4.692! 16.60 $ 53.23 $ 41.72 # 27.07 $ [ ] [ ] 14
15 5.090& 3.577& 5.193$ 3.413$ 3.016! 5.390! 11.41 $ 29.91 $ 33.91 $ 29.07 $ [ ] [ ] 15
16 5.115& 3.546& 4.246$ 3.196$ 2.986! 5.848! 14.26 $ 24.92 $ 32.54 $ 22.06 $ [ ] [ ] 16
17 5.213& 3.263& 4.210$ 3.275$ 3.023! 7.506! 11.27 $ 23.25 $ 55.96 $ 21.04 $ [ ] [ ] 17
18 5.019& 3.153& 4.078$ 3.160$ 2.956! 21.84 $ 12.02 $ 22.96 $ 36.66 # 20.71 $ [ ] [ ] 18
19 5.068& 3.180$ 4.064$ 3.158$ 2.873! 15.48 $ 10.93 $ 39.58 $ 30.92 $ 21.00 $ [ ] [ ] 19
20 5.153& 3.234$ 3.757$ 3.320$ 2.831! 17.37 $ 24.73 $ 54.47 # 29.43 $ 38.81 $ [ ] [ ] 20
21 5.086& 3.060$ 3.709$ 3.395$ 2.985! 42.88 $ 27.19 $ 31.80 $ 28.97 $ 41.00 # [ ] [ ] 21
22 5.105& 2.843$ 3.643$ 3.569$ 3.480! 27.34 $ 19.11 $ 26.33 $ 27.46 $ 26.91 $ [ ] [ ] 22
23 5.064& 2.975$ 3.694$ 3.618$ 5.018! 14.00 $ 29.92 $ 25.47 $ 27.88 $ 22.96 $ [ ] [ ] 23
24 5.192& 3.095$ 3.618$ 3.359$ 4.053! 11.20 $ 42.60 $ 42.78 $ 37.04 # 22.44 $ [ ] [ ] 24
25 5.426& 3.111$ 3.595$ 2.733$ 10.83 ! 9.267$ 22.14 $ 66.83 $ 27.67 $ 22.98 $ [ ] [ ] 25
26 4.786& 3.184$ 3.398$ 2.844$ 4.328! 8.872$ 16.12 $ 55.94 $ 26.02 $ 21.24 $ [ ] [ ] 26
27 4.391& 3.436$ 3.476$ 2.957$ 3.979! 8.245$ 44.23 $ 44.56 $ 25.47 $ 20.23 $ [ ] [ ] 27
28 4.462& 3.374$ 3.480$ 3.023$ 6.455! 7.741$ 60.23 $ 42.63 # 25.45 $ 24.15 $ [ ] [ ] 28
29 4.657& 3.524$ 3.026$ 7.782! 7.585$ 27.04 $ 32.67 # 24.67 $ 30.90 $ [ ] [ ] 29
30 4.620& 4.072$ 3.064! 9.414! 7.432$ 20.66 $ 31.25 $ 25.02 $ 22.99 $ [ ] [ ] 30
31 4.634& 3.474$ 8.170! 19.55 $ 40.47 # 23.55 $ [ ] 31
Mean 5.257& 3.597& 4.058$ 3.518! 4.319! 11.88 ! 19.63 $ 36.67 $ 35.05 $ 25.78 $ 18.49 & [ ]
Median 5.105& 3.569& 3.501$ 3.586! 3.528! 7.993! 15.43 $ 32.67 $ 31.08 $ 23.55 $ 21.12 & [ ]
Maximum 9.093& 4.573& 11.63 $ 4.539! 10.83 ! 42.88 ! 60.23 $ 66.83 $ 69.42 $ 41.00 $ 24.67 & [ ]
Minimum 4.391& 2.843& 3.197$ 2.733! 2.831! 4.692! 7.791$ 18.47 $ 24.67 $ 20.23 $ 12.29 & [ ]
Total 163.0 & 100.7 & 125.8 $ 105.5 ! 133.9 ! 356.5 ! 608.7 $1137 $1052 $ 799.1 $ 221.8 & [ ]
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 15.20 ! ! ... Not reviewed / Quality not known
Ann. Median 7.663! # ... Relative Uncertainty +/-15%
Annual Total 4803 ! $ ... Relative Uncertainty +/-20%
Missing Days 49 & ... Relative Uncertainty +/-30%
[ ... Not Available
Maximum Minimum
Daily 69.42 ! 2.733!