| LI Changliang,LIANG Bingchen,ZHANG Jing. 2009. Modeling of suspended sediment transport with waveinduced longshore current in Huanghe (Yellow) River Delta. Acta Oceanologica Sinica, (3):65－74 |
| Modeling of suspended sediment transport with waveinduced longshore current in Huanghe (Yellow) River Delta |
| Modeling of suspended sediment transport with waveinduced longshore current in Huanghe (Yellow) River Delta |
| Received:March 03, 2007 Revised:January 05, 2009 |
| DOI： |
| Key words:Huanghe River delta suspended sediment wave-induced longshore current COHERENS SWAN COHERENS-SED |
| 中文关键词: Huanghe River delta suspended sediment wave-induced longshore current COHERENS SWAN COHERENS-SED |
| 基金项目:This work was supported by 973 Project "Land-Sea interaction and its effect on the environment in the typical estuaries and offshore areas of China" under contract No. 2002CB412408 and Natural Science Foundation of Shandong Province under contract No. Q2007E05 |
| Author Name | Affiliation | E-mail | | LI Changliang | College of Petroleum Engineering, China University of Petroleum(East China), Qingdao,, 266555, China
Engineering College, Ocean University of China, Qingdao 266100, China | | | LIANG Bingchen | Engineering College, Ocean University of China, Qingdao 266100, China | liangbingchen6@yahoo.com.cn | | ZHANG Jing | Engineering College, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| A three-dimensional suspended sediment model (SED) developed by the present authors is coupled with the combinatorial model of COHERENS (Luyten et al., 1999) (the three-dimensional coupled hydrodynamical-ecological model for Regional and Shelf Seas) and SWAN (Holthuijsen et al., 2004) (the third generation wave model). SWAN is regarded as a subroutine of COHERENS and gets time-and space-varying current velocity and surface elevation from COHERENS. COHERENS gets time-and space-varying wave relevant parameters provided by SWAN. Effects of wave on current are applied in bottom shear stress, wave-induced depth-dependent radiation stress and surface drag coefficient calculation. At the same time, the damping function of suspended sediment on turbulence is introduced into COHERENS. So the sediment model SED has feedback on circulation model COHERENS. The SED obtains current associated parameters from COHERENS. Then a coupled hydrodynamic-sediment model COHERENS-SED being able to account for interaction between wave and current is obtained. COHERENS-SED is adopted to simulate three-dimensional suspended sediment transport in the Huanghe River delta. In terms of simulation results, there is obvious difference between top and bottom layer of wave-induced longshore current. The values of time series of sediment concentration gotten by COHERENS-SED have, generally, an accepted agreement extent with measurement. Significant wave heights and wave periods obtained by COHERENS-SED show that wave simulation case with current's effect can give better agreement extent with measurement than case without current's effect. In the meantime, suspended sediment concentration distributing rule obtained by COHERENS-SED is similar to former researches and measurement. |
| 中文摘要: |
| A three-dimensional suspended sediment model (SED) developed by the present authors is coupled with the combinatorial model of COHERENS (Luyten et al., 1999) (the three-dimensional coupled hydrodynamical-ecological model for Regional and Shelf Seas) and SWAN (Holthuijsen et al., 2004) (the third generation wave model). SWAN is regarded as a subroutine of COHERENS and gets time-and space-varying current velocity and surface elevation from COHERENS. COHERENS gets time-and space-varying wave relevant parameters provided by SWAN. Effects of wave on current are applied in bottom shear stress, wave-induced depth-dependent radiation stress and surface drag coefficient calculation. At the same time, the damping function of suspended sediment on turbulence is introduced into COHERENS. So the sediment model SED has feedback on circulation model COHERENS. The SED obtains current associated parameters from COHERENS. Then a coupled hydrodynamic-sediment model COHERENS-SED being able to account for interaction between wave and current is obtained. COHERENS-SED is adopted to simulate three-dimensional suspended sediment transport in the Huanghe River delta. In terms of simulation results, there is obvious difference between top and bottom layer of wave-induced longshore current. The values of time series of sediment concentration gotten by COHERENS-SED have, generally, an accepted agreement extent with measurement. Significant wave heights and wave periods obtained by COHERENS-SED show that wave simulation case with current's effect can give better agreement extent with measurement than case without current's effect. In the meantime, suspended sediment concentration distributing rule obtained by COHERENS-SED is similar to former researches and measurement. |
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