EVALUATION OF FISH HABITAT USING TWO-DIMENSIONAL NUMERICAL ANALYSIS

Abstract

Recently, discharge management in the normal period becomes important from the viewpoint of the maintenance of the habitat environment. In this paper, we carry out plane numerical calculation for the river basin and the evaluation of the fish habitat with the change of discharge.

First, we apply the model and confirm the validity of it. By using verified model, we calculate the discharge of each point with the change of upstream discharge, and we are able to understand appropriate discharge for fish habitat, plane and vertically. Hence, we come to be able to grasp the water depth and velocity distribution and understand the fish habitat.