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About Grain Size Distribution and River Bed Change around a Spur-Dike with a Flood

1996; Volume: 40; Linguagem: Inglês

10.2208/prohe.40.799

1884-9172

Naruhiko Muneta, Yasuyuki SHIMIZU, Tadaoki ITAKURA,

Hydrology and Watershed Management Studies

It is one of the important subject in river planning works to predict flow field and bed topography in the region around spur-dikes. Especially, the qualitative understanding of the mechanism of sediment deposition produced by spur-dikes enables the effective design of spur-dike collocation. However, since various complex phenomena are coexisting in the neighborhood of spur-dikes, it is necessary to investigate which phenomenon is essential for the sediment deposition around spur-dikes. In this study, a detailed observation of flow and river bed material in an area including a spur-dike in an actual river is performed, and the mechanism of sediment deposition produced by spur-dike is discussed.