| 时段 | 流量级(m3/s) | 备注 | |||||
| 500 | 2000 | 5000 | 7000 | 15000 | 20000 | ||
| 1958~1967 | −1.25 | −1.92 | −1.65 | −1.25 | −0.12 | 0.20 | 建库前后 |
| 1968~1983 | −0.06 | 0.04 | 0.00 | 0.03 | −0.04 | 0.00 | 蓄水期 |
| 1984~1999 | −0.64 | −0.21 | −0.22 | −0.15 | 0.19 | 0.42 | 蓄水至王甫洲运用前 |