STUDY ON THE WATER CURRENT CONTROL BY THE WATER PRESERVATION FACILITIES IN OGOUCHI RESERVOIR

Abstract

The vertical profiles of water current and temperature were measured in the Ogouchi Reservoir in order to investigate the mechanism of the water current control by the water preservation facilities.The constant current of 30 mm/s was observed around the vertical fence, it was suggested that these flows were a river inflow.And it was appeared that these flows were directed to the depth of 10 m by the vertical fences, and led to the layer which was the same temperature as the river inflow in center of the reservoir.As results of numerical calculation, the mechanism of the water current control by the vertical fence is reproduced, it was shown that water temperature was decreased in the upstream region of the vertical fence.It was suggested that it is possible to lead efficiently the river inflow by setting the withdrawal gate on the layer of the same temperature as the river inflow.