| A 2D Mathematical Model for Sediment Transport by Waves and Tidal Currents |
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| 作者姓名： | 陆永军 左利钦 邵学军 王红川 李浩麟 |
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| 作者单位： | [1]Nanjing Hydraulic Research Institute, State＇ s Key laboratory of Hydrology, Water Resources and Hydraulic Engineering Science, Nanjing 210029, China [2]Department of Hydraulic Engineering, Tsinghua University, Belling 100084, China |
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| 基金项目： | This work was supported by the National Basic Research Program （973） of China （Grant No. 2003CB415206） and the National Natural Science Foundation of China （Grant No. 50379027 and No. 50479004） |
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| 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.
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| 关 键 词： | 土沙流送 排水沟 泥浆 底沙 悬荷 数学模型 潮流 波浪 |
| 收稿时间： | 2004-10-08 |
| 修稿时间： | 2005-07-19 |
A 2D Mathematical Model for Sediment Transport by Waves and Tidal Currents |
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| LU Yong-jun a,ZUO Li-qin a,SHAO Xue-jun b,WANG Hong-chuan a and LI Hao-lin aa Nanjing Hydraulic Research Institute,State's Key Laboratory of Hydrology,Water Resourcesand Hydraulic Engineering Science,Nanjing,Chinab.A 2D Mathematical Model for Sediment Transport by Waves and Tidal Currents[J].China Ocean Engineering,2005,19(4):571-586. |
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| Authors: | LU Yong-jun a ZUO Li-qin a SHAO Xue-jun b WANG Hong-chuan a and LI Hao-lin aa Nanjing Hydraulic Research Institute State's Key Laboratory of Hydrology Water Resourcesand Hydraulic Engineering Science Nanjing Chinab |
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| Institution: | LU Yong-jun ~a,1,ZUO Li-qin ~a,SHAO Xue-jun ~b,WANG Hong-chuan ~a and LI Hao-lin ~a~a Nanjing Hydraulic Research Institute,State's Key Laboratory of Hydrology,Water Resourcesand Hydraulic Engineering Science,Nanjing210029,China~b Department of Hydraulic Engineering,Tsinghua University,Beijing100084,China |
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| Abstract: | 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. |
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| Keywords: | wave tidal current mathematical model suspended load bed load mud back silting waterway |
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