IHA
Units
Pre-reservoir (1961–1974) Post-reservoir (1975–2017) Relative change (%)
Mean flow in January m3/s 10.64 20.40 0.92
Mean flow in February m3/s 8.89 19.49 1.19
Mean flow in March m3/s 22.81 21.39 -0.06
Mean flow in April m3/s 47.18 28.41 -0.40
Mean flow in May m3/s 50.81 123.57 1.43
Mean flow in June m3/s 41.97 83.69 0.99
Mean flow in July m3/s 116.86 120.62 0.03
Mean flow in August m3/s 276.87 148.98 -0.46
Mean flow in September m3/s 100.88 58.99 -0.42
Mean flow in October m3/s 55.53 40.43 -0.27
Mean flow in November m3/s 37.82 31.18 -0.18
Mean flow in December m3/s 18.95 24.41 0.29
1-day minimum m3/s 6.83 8.29 0.21
3-day minimum m3/s 7.07 8.66 0.22
7-day minimum m3/s 7.46 9.53 0.28
30-day minimum m3/s 8.38 11.97 0.43
90-day minimum m3/s 16.53 16.97 0.03
1-day maximum m3/s 1455.91 787.36 -0.46
3-day maximum m3/s 1265.55 713.57 -0.44
7-day maximum m3/s 948.76 570.27 -0.40
30-day maximum m3/s 477.75 311.08 -0.35
90-day maximum m3/s 255.91 178.88 -0.30
Base flow index m3/s 0.10 0.14 0.45
Date of minimum day 102.55 125.13 0.22
Date of maximum day 203.73 202.62 -0.01
Low pulse count - 3.82 6.16 0.61
Low pulse duration day 14.50 9.70 -0.33
High pulse count - 4.09 7.38 0.80
High pulse duration day 15.64 10.88 -0.30
Rise rate m3/s/day 2.17 2.41 0.11
Fall rate m3/s/day -2.31 -2.12 -0.08
Numbers of reversals - 99.64 111.20 0.12