RUNOFF SIMULATION OF EXPERIMENTAL WATERSHED BASED ON THE CONCEPT OF VARIABLE SOURCE AREA

Abstract

This paper studies primarily runoff simulation based on the concept of variable source area and the optimization technique for a mountain watershed located in Taiwan. The different hillslope lengths derived by virtue of kinematic wave theory, and the occurrence conditions related to the expanding and shrinking process between the overland and subsurface flow, are also introduced into the modeling procedure of runoff simulation. The proposed analytical method is finally applied to the study watershed in order to check its reliabilities.