EFFECTS OF LANDUSE CHANGES ON RIVER DISCHARGES IN THREE RIVER BASINS OF AICHI PREFECTURE

Abstract

The purpose of this study is to clarify the effect of landuse changes on river discharges in future. We firstly estimated the numbers of population and households of the basins in 2050. Secondary, the surplus areas were calculated based on the scenarios of compactness index and were relocated to the natural land uses, such as paddy field and main natural land uses. Under the several scenarios of land use changes in future, we simulated river discharges of the basins. The results of this study indicated the importance of landuse changes, i.e. increasing natural land use and shrinking urban landuse.