Effect of the Karigane Bank in the Fuji River on Maintenance of the Flow Channel

Abstract

The Karigane Bank in the Fuji River was constructed as a flood control works about three hundred years ago. The bank is located at the top of the alluvial fan near the river mouth. The purpose of this study is to get hydraulic evaluation of the flood control works maintaining the flow channel. Several sets of experiments with hydraulic models including mobile bed were conducted. In each experiment, surface velocity of flow, river bed configulation after runoff and flow patterns were measured, and effect of the bank system on maintenance of the channel was discussed. The results of this study showed that the existing formation of the works with the spur dikes could separate a flood way from the retarding areas in the channel and make the works an excellent flood control system.