Abstract
There have been many studies on density current in estuary such as a problem of mixed density current, salt wedge, and buoyant jet. The upstream intrusion of saline water has become a social problem for river environment and water resources. In view of taking water resources durably and preventing the ecology, artificial control methods for preventing the saline water intrusion are quired. Setting up a mound on a riverbed and using a bubble plume have been proposed and applied to real estuaries. However, these control methods have a few problems for the river improvement and the control effect. So, the author proposed an artificial control method with lateral depth-varied barrier, which does not need much labor and cost for maintenance and also examined its control effect numerically.
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