Prediction of Flood Flow Profiles in River Courses with Luxuriant Vegetations

Abstract

Comprehensive field observations have been conducted to investigate characteristics of flood flow in the Hinuma River. The observations revealed that the water stage had irregular profiles due to longituidinal variation in the roughness consisting of luxuriant vegetations on the flood plains. The irregularity of flow profiles couldn't be reproduced well by the conventional method of non-uniform flow computation. In consideration of these facts, the method of flow computation was improved so that it would be possible to predict flow profiles in channels with luxuriant vegetations with more accuracy, compared with the existing methods.