急流河川における砂州を活かした治水と環境の調和した河道計画

抄録

In the Jyoganji River, it is a serious problem for a river improvement that severe scouring along riverbanks has been increased by the installation of concrete revetment works. A new bank protection method is required for the channel design for harmonization between flood control and river environment in stony bed rivers.

This study investigates the formation process of channels developed along the riverbank and presents the problem of revetment works in the Jyoganji River by the analysis of the flood flow and riverbed variation. Then, we demonstrate riverbank protection capability of sandbars with boulders as a flow attacking measure, and propose a comprehensive channel planning by the use of sandbars in stony bed rivers.