Basin wide | The county area | Statistical parameters of surface water resources | Design value of surface water resource quantity | |||||
Mean value | Cv | Cs | p = 20% | p = 50% | p = 75% | p = 95% | ||
The upper Minjiang River | Wenchuan | 30.94 | 0.13 | 0.25 | 35.08 | 30.59 | 27.36 | 23.27 |
Lixian | 31.81 | 0.09 | 0.19 | 34.74 | 31.63 | 29.30 | 26.26 | |
Maoxian | 20.23 | 0.10 | 0.21 | 22.32 | 20.11 | 18.45 | 16.29 | |
Songpan | 46.78 | 0.10 | 0.20 | 52.63 | 46.28 | 41.72 | 35.96 | |
Heishui | 29.02 | 0.10 | 0.19 | 31.94 | 28.84 | 26.52 | 23.49 |