2018 Volume 23 Issue 2 Pages 43-52
In the downstream part of the water supply system using a long open channel, a supply-demand gap occurs in which the water supply amount is smaller than the demand amount. In the agricultural water section of Aichi Canal Project, the supply-demand gap is adjusted by the upstream and downstream water level control gates that control both the upstream water level and the downstream water level of the gate. The set-up method of downstream control water level of the gate enables switching between demand-oriented operation using level-reactive gate and supply-oriented operation using flow rate-reactive gate. As a result of simulation of water supply management using the upstream and downstream water level control gates, it became clear that the difference in the setting method of the gate downstream control water level affects the allocation function of the channel storage amount and the replenishment for supply-demand gap. When combining two types of downstream controlled water level setting methods, it is possible to switch to supply-oriented operation, based on demand-oriented operation, and the flow condition improvement effect is obtained.
