A Study on Sediment Yield and Transport Properties at Basin Scale Using a Distributed Rainfall and Sediment Runoff Model

Abstract

The purpose of this study is to predict accurately sediment yield and transport by torrential rain, using a distributed rainfall and sediment runoff model. The authors construct an analytical model for dealing with sediment yield from slope failure to transport processes, and enable to estimate sediment runoff by torrential rain. However, being strongly dependent on the initial conditions of river sediments, the model needs to understand the dynamics of each sediment origin. This paper clarifies the basin-scale dynamics of sediment during torrential rains, by improving the model to be able to identify the grain size of sediment movement due to each of the slope failure and the initial conditions of river sediments.