A 2D Mathematical Model for Sediment Transport by Waves and Tidal Currents

查看全文 作　　者：[1]陆永军;[1]左利钦;[2]邵学军;[1]王红川;[1]李浩麟

机构地区：[1]Nanjing Hydraulic Research Institute, State's Key Laboratory of Hydrology,Water Resourcesand Hydraulic Engineering Science, Nanjing210029,China;[2]Department of Hydraulic Engineering, Tsinghua University, Beijing100084,China

出　　处：《China Ocean Engineering》索引2005年第19卷第4期,共16页

基　　金：This work was supported bythe National Basic Research Program(973) of China (Grant No.2003CB415206) andthe National Natural Science Foundation of China (Grant No.50379027 and No.50479004) 摘　　要：In this study, the combined actions of waves and tidal currents in estuarine and coastal areas are considered and a 2D mathematical model for sediment transport by waves and tidal currents has been established in orthogonal curvilinear coordinates. Non-equilibrium transport equations of suspended load and bed load are used in the model. The concept of background concentration is introduced, and the formula of sediment transport capacity of tidal currents for the Oujiang River estuary is obtained. The Dou Guoren formula is employed for the sediment transport capacity of waves. Sediment transport capacity in the form of mud and the intensity of back silting are calculated by use of Luo Zaosen’s formula. The calculated tidal stages are in good agreement with the field data, and the calculated velocities and flow directions of 46 vertical lines for 8 cross sections are also in good agreement with the measured data. On such a basis, simulations of back silting after excavation of the waterway with a sand bar under complicated boundary conditions in the navigation channel induced by suspended load, bed load and mud by waves and tidal currents are discussed. 关键词：土沙流送排水沟泥浆底沙悬荷数学模型潮流波浪

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A 2D Mathematical Model for Sediment Transport by Waves and Tidal Currents

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