Flow Analysis in a Meandering River Using HEC-RAS Model

Abstract

Flood flow studies contribute to a huge percentage of research in the field of water resource. Considering a few simplifications, an attempt has been made to create an accurate one-dimensional, unsteady, flow model for the Barak River defining upstream section at Fulertaal ghat and downstream section at Badarpur ghat of the Barak River. The flow model is analyzed with the aid of widely used modeling program, HEC-RAS. Based on the principle governing gradually varying flow, the flow model is derived from the Saint-Venant equations. The accuracy of the model depends upon the assumptions and limitations, accuracy of geometric data, flow data, boundary conditions, and numerical accuracy of the computation schemes. The study indicates that river flow can be routed through any intermediate cross section from the upstream location to downstream location for a discrete time step with the assistance of limited number of known parameters.