Journal of Geographical Sciences ›› 2010, Vol. 20 ›› Issue (1): 49-63.doi: 10.1007/s11442-010-0049-5

• Geomorphology • Previous Articles     Next Articles

Diagnostic experiments for transport mechanisms of suspended sediment discharged from the Yellow River in the Bohai Sea

LI Guosheng1,3, XUE Xinghua1,2,5, LIU Ying1,2, WANG Hailong4, LIAO Heping3   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;
    3. School of Geographic Science, Southwest University, Chongqing 400715, China;
    4. Guangdong Electric Power Design Institute, Guangzhou 510663, China;
    5. College of Gardening and Horticultural, Yangtze University, Jingzhou 434325, Hubei, China
  • Received:2009-07-10 Revised:2009-09-02 Online:2010-02-15 Published:2010-08-16
  • Contact: Liao Heping (1964–), Ph.D and Professor, specialized in land use and land resources management. E-mail: liaohp@swu.edu.cn E-mail:liaohp@swu.edu.cn
  • About author:Li Guosheng (1963–), Ph.D and Professor, specialized in remote sensing and GIS. E-mail: ligs@igsnrr.ac.cn
  • Supported by:

    National Natural Science Foundation of China, No.40771030; No.40571020

Abstract:

Five diagnostic experiments with a 3D baroclinic hydrodynamic and sediment transport model ECOMSED in couple with the third generation wave model SWAN and the Grant–Madsen bottom boundary layer model driven by the monthly sediment load of the Yellow River, were conducted to separately diagnose effects of different hydrodynamic factors on transport of suspended sediment discharged from the Yellow River in the Bohai Sea. Both transport and spatio-temporal distribution of suspended sediment concentration in the Bohai Sea were numerially simulated. It could be concluded that suspended sediment discharged from the Yellow River cannot be delivered in long distance under the condition of tidal current. Almost all of sediments from the Yellow River are deposited outside the delta under the condition of wind-driven current, and only very small of them are transported faraway. On the basis of wind forcing, sediments from the Yellow River are mainly transported north-northwestward, and others which are first delivered to the Laizhou Bay are continuously moved northward. An obvious 3D structure characteristic of sediment transport is produced in the wind-driven and tide-induced residual circulation condition. Transport patterns at all layers are generally consistent with circulation structure, but there is apparent deviation between the depth-averaged sediment flux and the circulation structure. The phase of temporal variation of sediment concentration is consistent with that of the bottom shear stress, both of which are proved to have a ten-day cycle in wave and current condition.

Key words: sediment from the Yellow River, suspended transport, dynamic mechanism, diagnostic experiment