EXPECTED FLUVIAL SAND SUPPLY FROM A RIVER FOR REFORMING A RIVER MOUTH DELTA -AN EXAMPLE OF THE SAGAMI RIVER-
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概要
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The Sagami River flowing into Sagami Bay is the main source of sand to the Shonan coast of 16 km length extending between Oiso Port and Enoshima Island. In the upper stream of this river, large dams were constructed and large-scale river bed excavation had been carried out to obtain construction materials before 1967. These resulted in the decrease in sediment supply from 1.5x105 m3/yr to 5000 m3/yr and the shoreline recession around the river mouth. In this study, an expected fluvial sand supply for reforming a river mouth delta of the Sagami River was investigated, using the contour-line-change model considering grain size changes. It was concluded that the expected sand supply from the river necessary for recovering the river delta within 30 years from the present was (1.0-1.5)x105 m3/yr.
- Japan Society of Civil Engineersの論文
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