Simulation and Analysis of Debris Flow of Chui-Sue River Watershed

In 1996 typhoon Herb struck the central Taiwan area, causing severe debris flow in many locations of the Chen-You-Lan river watershed. In order to understand the potential affected area and its severity, it is desirable to be able to simulate the flow route of debris. In this research numerical simulation of debris flow and deposition process had been carried out using FLO-2D adopting Chui-Sue River watershed as the study case. The microgeomorphic database had been created to distinguish the position and volume of debris deposition at Chui-Sue River. Results of the potential analysis were satisfactory on estimating debris flow region and deposition thickness when compared to the field data obtained from microgeomorphic study.