Possibility of Reduction of Energy for Irrigation and Drainage on Reconstruction of Irrigation System

—A case study of Niitsugo—

Abstract

The reduction of energy for irrigation and drainage by reconstruction of two-step irrigation system with open-channel and booster pump stations in Niitsugo is calculated. 5,278 MWh (3,576 MWh as theoretical energy) is consumed in the existing system for irrigation and drainage. It is found that 1,465 MWh which is 41% of the theoretical energy will be reduced by merging pump stations and installation regulation tanks. The most effective measure is improving pipeline networks which contributes 70% of the reduction. Even if pump stations are merged in order to reduce labor, the reduction of energy for irrigation and drainage will be achieved in lowland paddy area like this case by means of combining other measures.