NUMERICAL MODELING OF FLOODWATER INTRUSION AND FINE SUSPENDED SEDIMENT BEHAVIOR IN A STRATIFIED RESERVOIR

Abstract

This paper presents a development of a numerical model that simulates flood water intrusion into a stratified reservoir and fine suspended sediment behavior. The model is based on laterally averaged vertical 2-dimensional equations and κ-ε turbulence model, which are solved by using SIMPLE scheme.
A laboratory experiment was conducted on settlement of fine suspended sediment and a tentative modeling is proposed to estimate settling velocity of fine solid. The model is validated by simulating the flood event on which the field measurement was conducted. Vertical distributions of suspended sediment concentration are well reproduced and effectiveness of the proposed model is demonstrated.