Table 6. Maintenance water capacity and remaining volume in the waterhead (Non-waterproof, unit: tons)
Storage | Class | Mean | Apr. | May | Jun. | Jul. | Aug. | Sept. | Oct. |
(A) Evaporation | 330.1 | 312.9 | 387.3 | 382.2 | 336.0 | 366.2 | 289.3 | 236.9 |
2,012 ton (0.5m) | (B) Leakage | 521.5 | 521.5 |
(C) Maintenance | 1,528.5 | 1,503.4 | 1,611.8 | 1,604.4 | 1,537.1 | 1,581.0 | 1,469.0 | 1,392.7 |
Residual depth (Volume) | 0.12m (483.5 / 24.0%) | 0.13m (508.6) | 0.10m (400.2) | 0.10m (407.6) | 0.12m (474.9) | 0.11m (431.0) | 0.13m (543.0) | 0.15m (619.3) |
4,024 ton (1.0m) | (B) Leakage | 1,025.5 | 1,043.0 | 920.82 |
(C) Maintenance | 2,032.5 | 2,024.9 | 2,133.3 | 2,125.9 | 2,058.6 | 2,102.5 | 1,990.5 | 1,792.0 |
Residual depth (Volume) | 0.48m (1,924.1 / 47.8% | 0.50m (1,999.1) | 0.47m (1,890.7) | 0.47m (1,898.1) | 0.49m (1,965.4) | 0.48m (1,921.5) | 0.51m (2,033.5) | 0.44m (1,760.5) |
6,036 ton (1.5m) | (B) Leakage | 1,439.1 | 1,330.4 | 1,564.5 | 920.8 |
(C) Maintenance | 2,446.1 | 2,312.3 | 2,654.8 | 2,647.4 | 2,580.1 | 2,624.0 | 2,512.0 | 1,792.0 |
Residual depth (Volume) | 0.77m (3,106.1 / 51.4%) | 0.70m (2,820.6) | 0.84m (3,381.2) | 0.84m (3,388.6) | 0.86m (3,455.9) | 0.85m (3,412.0) | 0.88m (3,524.0) | 0.44m (1,760.5) |
Storage = A (Evaporation) + B (Leakage) + Supplying maintenance water for artificial channel (see Table 4).
Residual water level (and volume) = Storage - C (Maintenance water).