Modeling the circulation and sediment transport in the Beibu Gulf
- 127 Downloads
Water circulation and sediment transport in the Beibu Gulf are important for its environmental protection and resource exploitation. By employing the Regional Ocean Modeling System (ROMS), we studied the seasonal variation of circulation, sediment transport and long-term morphological evolution in the Beibu Gulf. The simulation results show that the circulation induced by tide and wind is cyclonic both in winter and summer in the gulf and that the wind-driven circulation is stronger in winter than that in summer. The sediment concentration is higher in the Qiongzhou Strait, west of the Hainan Island and the coast of Vietnam and the Leizhou Peninsula. The sediment is transported westwards in winter and eastwards in summer in the Qiongzhou Strait. The west entrance of the Qiongzhou Strait is dominated by westward transport all the year round. The sediment discharged by rivers is deposited near the river mouths. The simulated result demonstrates that the sediment transport is mainly controlled by tidal induced bottom resuspension in the Beibu Gulf. Four characteristics are summarized for the distribution patterns of erosion and deposition. (1) The erosion and deposition are insignificant in most area of the gulf. (2) Sediment deposition is more significant in the mouths of Qiongzhou Strait. (3) The erosion is observed in the seabed of Qiongzhou Strait. (4) Erosion and deposition occur alternatively in the west of Hainan Island.
KeywordsBeibu Gulf circulation sediment transport Regional Ocean Modeling System (ROMS)
Unable to display preview. Download preview PDF.
The authors thank Li Yineng, Li Changyu and Zhao Junpeng for their help on the preparation of this article, and also thank Gao Jianhua for his constructive comment.
- Ding Yang, Chen Changsheng, Beardsley R C, et al. 2013. Observational and model studies of the circulation in the Gulf of Tonkin, South China Sea. Journal of Geophysical Research, 118(12): 6495–6510, doi: 10.1002/2013JC 009455Google Scholar
- Hedström K S. 2012. DRAFT Technical Manual for a Coupled Sea- Ice/Ocean Circulation Model (Version 4). Alaska: US Department of the Interior Minerals Management Service AnchorageGoogle Scholar
- Huang Yichen, Li Yan, Shao Hao, et al. 2008. Seasonal variations of sea surface temperature, chlorophyll-a and turbidity in Beibu gulf, MODIS imagery study. Journal of Xiamen University (Natural Science) (in Chinese), 47(6): 856–863Google Scholar
- Li Zhanhai, Ke Xiankun. 2000. Prelimary study on tidally-induced sediment fluxes of the Qiongzhou strait. Marine Science Bulletin (in Chinese), 19(6): 42–49Google Scholar
- Liu Ruiyu. 1964. A Report about the Marine Systematic Survey Conducted by China and Vietnam (in Chinese). Beijing: State Scientific and Technological CommissionGoogle Scholar
- Wang Ying. 2012. Regional Oceanography of China Seas: Marine Geomorphology (in Chinese). Beijing: China Ocean PressGoogle Scholar
- Xia Huayong, Li Shuhua, Shi Maochong. 2001. Three-D numerical simulation of wind-driven current and density current in the Beibu Gulf. Acta Oceanologica Sinica, 20(4): 455–472Google Scholar
- Yang Zhihong, Jia Jianjun, Wang Xinkai, et al. 2013. Characteristics and variations of water and sediment fluxes into the sea of the top three rivers of Hainan in recent 50 years. Marine Science Bulletin (in Chinese), 32(1): 92–99Google Scholar
- Zhang Guorong, Ma Teng, Pan Weiran, et al. 2009. The characteristics of low-frequency flow in the west mouth of Qiongzhou Strait and its response to the seasonal wind field. In: The Essay Collection of the Researches on the Ocean Science in the Gulf of Tonkin-PT II (in Chinese). Beijing: China Ocean Press, 64–76Google Scholar
- Zhao Chang, Lv Xingang, Qiao Fangli. 2010. Numerical study of the tidal waves in the Gulf of Tonkin. Haiyang Xuebao (in Chinese), 32(4): 1–11Google Scholar
- Zu Tingting. 2005. Analysis of the current and its mechanism in the Gulf of Beibu (in Chinese) [dissertation]. Qingdao: Ocean University of ChinaGoogle Scholar