Efficient Water Supply Management by Introduction of Dual Channels

— Case study in Toyogawa waterway district —

Abstract

This research aims at evaluating the effectiveness of the dual channel system by the numerical simulations for the improvement of irrigation water management. The study site is Toyogawa waterway district located in the eastern part of Aichi Prefecture. In this district, upstream excessive water withdrawals often caused water deficit problems at the downstream areas of the East Main Channel. The open channel system had some difficulties for the fair water distribution. In order to solve this problem, a supplemental pipeline is now under construction to support the open-type main channel. The numerical simulation showed that the open-and-closed dual channel system can respond quickly to the water demand, make easier the operation of farm ponds and regulation reservoirs, and consequently relieve water deficit problems.