| 统计量 | 统计参数 | 设计值 | ||||||
| Ex | Cv | Cs/Cv | 0.01% | 0.10% | 1% | 5% | ||
| 年最大洪峰 | 坝址 | 52,000 | 0.21 | 4 | 113,000 | 98,800 | 83,700 | 72,300 |
| 入库 | 54,800 | 0.22 | 4 | 123,300 | 107,400 | 90,300 | 77,200 | |
| 变幅 | 5.38% | — | — | 9.12% | 8.70% | 7.89% | 6.78% | |
| 年最大3 d洪量 | 坝址 | 130 | 0.21 | 4 | 282.1 | 247 | 209.3 | 180.7 |
| 入库 | 134 | 0.22 | 4 | 301.6 | 262.5 | 220.8 | 188.7 | |
| 变幅 | 3.08% | — | — | 6.91% | 6.28% | 5.49% | 4.43% | |
| 年最大7 d洪量 | 坝址 | 275 | 0.19 | 3.5 | 547.2 | 486.8 | 420.8 | 368.5 |
| 入库 | 270 | 0.21 | 3.5 | 573.5 | 505.4 | 431.4 | 373.5 | |
| 变幅 | −1.82% | — | — | 4.81% | 3.82% | 2.52% | 1.36% | |
| 年最大15 d洪量 | 坝址 | 524 | 0.19 | 3 | 1022 | 911.8 | 796.3 | 702.2 |
| 入库 | 515 | 0.20 | 3 | 1034.9 | 922.4 | 798.8 | 700.1 | |
| 变幅 | −1.72% | — | — | 1.26% | 1.16% | 0.31% | −0.30% | |