Effective Utilization of Rainfall on the Isolated Island (II)

Abstract

This paper is a study on structures of intake works of an isolated island where it is rainy, the topography is steep and the valley is deep. After investigating the structures of the existing intake works, the topography and the streams of Yaku Island in Kagoshima prefecture, the problems of these intake works are made clear. And intake works are designed and constructed, which are fit for the rainy and steep place. Then the utilization of rainfall on the isolated island is analyzed. And, a new multipurpose construction combining a debris barrier with a torrent work is exploited to prevent debris flows and to take water at the same time.