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).