Numerical studies for formation of sand bars in the Agano river mouth

Tokuzo HOSOYAMADA, Masashige TAYASU, Takaaki YASUTA
2011 Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering)  
Sandbars in the Agano river have seasonal change, such as decay in summer and regrowth in winter basically. In this study, regrowth of the sandbars are simulated with numerical code of interactions among waves, river flows, littoral drift and bathymetrical changes. Multi-directional irregular waves are used for incident wave condition for the purpose of consistency of natural condition. Terrain model was obtained by convert of Agano river mouth bathymetric image to DEM(Digital Elevation Model)
more » ... l Elevation Model) data. Numerical results show that deformation of sand bars are strongly affected by river flow discharge and directional conditions of incident wave. The shape of sandbars simulated by the model agrees well with airborne image of terrain of the Agano river-mouth, especially in the left bank of the river.
doi:10.2208/kaigan.67.i_561 fatcat:k7gvbefifzdkhomto452l6rfvy