Title: ARTIFICIAL CONTROL OF THE PATTERN OF RIVER DISCHARGE TO REDUCE THE SALINITY INTRUSION IN A WELL-MIXED TYPE ESTUARY
Abstract: We proposed a method to reduce the salinity intrusion of well-mixed type by controlling artificially the pattern of river discharge with tidal phase in a tidal estuary. In order to examine the effect of this method, some experimental simulations were made under various conditions of river discharge.In this study, the effect of the pattern of river discharge, the most effective timing of discharge when the water was stored, and the relation between the reduction of salinity intrusion and the ratio of the volume of fresh water flowing in during a tidal period to the tidal prism were examined. As a result, it was made clear that discharging the river water intensively during the flood tide could reduce the salinity intrusion effectively when the river discharge was relatively large.