A Case Study on Water Use Characteristics of Farm Ponds in the Toyokawa Irrigation System

Abstract

When we try to find effective water maintenance, we feel keenly the necessity of actual studies about the time structure of water appliciation in the terminal fields. Therefore, we investigated about the characteristics and time structure of irrigation water, especially in nonpaddy fields. This paper is based on the experimental data on farm ponds in the Toyokawa Irrigation System. The principal conclusions are as follows.
a) There is concentration of water use both daily and seasonally.
b) Water consumption in the actual fields is less than its planning value in the irrigation season, but there was much rainfall in the year of the investigation.
c) Water appliciation on a farm pond generally shows several patterns.
d) After a modern irrigation system has been constructed, multi-water applications for agricultural use are becoming remarkably.