LAKE BIWA RESTORATION STRATEGY BASED ON PREDICTION OF LAKE BIWA SHORE TYPE USING LAKESHORE ENERGY FLUX AFTER CHANGES IN OUTSTANDING WIND

Abstract

 In recent years, the outstanding wind on lake biwa has shifted from the northwest to the north. In this paper, we simulated the transition of lakeshore shape after wind direction change under multiple scenarios using lakeshore energy flux as an index.

 As a result, when the excellent wind approached the north, it was found that the lakeshore energy flux increased near the mouth of the Amano River from the mouth of the Aichi River on the east shore of Lake Biwa, and the lakeshore erosion became intense. It was also confirmed that the lakeshore energy flux decreases on the right bank of the inflow river delta in the vicinity of the mouth of the Chomeiji River from the Biwako Bridge, and the vegetation belt tends to be distributed easily.

 Based on the above results, the restoration areas, where vegetation belt conservation should be given priority, were picked up so that appropriate countermeasures were suggested. It was proposed that a substantial response under the cooperation of related organizations was made by utilizing the framework of the Lake Biwa Conservation and Restoration Plan with a view to lake basin governance.