221-Predicting Vulnerable Bank Erosion Zones in a Large River Meander.

Abstract

A two dimensional hydrodynamic and morphological river flow model has been developed which solves the continuity and momentum equations. It predicts the rate of bank erosion, bed level changes and so on. The model is used to identify the vulnerable bank erosion zones in a river meander and the performance has been evaluated by comparing with bank line shifting obtained from the multi-date satellite imagery. This paper presents the temporal variation of the erosion rate with the flood flow. A study site has been selected in the River Brahmaputra in Assam, India. The model predicts fairly close erosion zones with the actual field situation.