| Dam material | Permeability coefficient /(m・s−1) | Dam material | Permeability coefficient /(m・s−1) |
| Core wall | 2 × 10−9～2 × 10−7 | Fine rock transition material | 2 × 10−3 |
| I anti (Dr = 0.8) | 2 × 10−5 | Upstream and downstream cofferdam | 1 × 10−2 |
| II anti (Dr = 0.85) | 2 × 10−3 | Curtain | 5 × 10−8 |
| Ⅰarea of rockfill | 1 × 10−2 | Weakly weathered rock mass | 5 × 10−7 |
| Ⅱarea of rockfil | 8 × 10−4 | New rock mass | 1 × 10−7 |