LOCAL SCOUR CHARACTERISTICS OF GROINS AT TIDAL WATERWAYS AND THEIR SIMULATION

Xiping Dou, Xinzhou Zhang, Xiao-dong Zhao, Xiangming Wang

Abstract


For the channel regulation in tidal rivers, groins are often used as typical hydraulic structures. Precisely predicting the local scour depth at the groin head is the key for the project of river regulation. The local scour of groins for tidal rivers is significantly different from that for the undirectional steady flow of general rivers. In the present paper, a three-dimendional (3D) mathematical model for turbulence and sediment transport are establishmented. The local scour near the groin under the actions of tidal current and steady flow are simulated by established 3D turbulence and sediment transport numerical model.The differences of the scour development and the scour pattern near the groin under these two actions are compared.

Keywords


tidal river; local scour; groin; numerical model; finite volume method (FVM)

References


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Xibing Dou. 1997.Numerical simulation of three dimensional flow field and local scour at bridge crossings. Mississippi, The University of Mississippi. PMCid:21514


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