Actual Condition of Maintenance of Irrigation Ponds and Land Use Changes in Its Service Area

A Case Study of Sangawa Town, Sanuki City, Kagawa Prefecrure

Abstract

This study shows the character of land use changes in farmlands and abolition reason of the irrigation ponds for 30 years from 1970s to 2000s as a case study of Sangawa Town, Sanuki City, Kagawa Prefecture by regression analysis. The results of the first regression analysis showed the relevance of a lot of the explanatory variables and land use changes in farmlands. And the results of the second regression analysis showed the relevance of the frequency of mowing and the abolition of the irrigation ponds.