山地河川の流路変動に関する研究

Abstract

In mountainous rivers, huge rocks are scattered on river bed which have been supplied by debris flows or side slope failure caused by heavy rainfalls or earthquakes.The rocks can not be transpoted by medium or small floods, and affect stream channels variation and sediment runoff.In this paper, flume tests are conducted to investigate the process of channel variation where gravels are set along the banks of the stream channels in order to clarify the relationship between arrangement of rocks and stream channel variation.Numerical simulation model is also proposed to calculate the channel variation, and the results of the calculation are compared with the data obtained from the flume tests.