巴达棱湾悬沙分布特征及动力机制

doi:10.11978/j.issn.1009-5470.2014.06.004

Abstract

Abstract: Base on the sea level, current, suspended sediment concentration data observed during the dry season in April 2007 and the rainy season in July 2007 in the Tuy Phong Bay, and combined with the annual data of wind and wave from May 2007 to April 2008, the distribution and transport trend of suspended sediment in this area was analyzed. We also carried out dynamic mechanism analysis of suspended sediment transport using the mechanism decomposition method. We found that the suspended sediment concentration had the seasonal property of being lower in dry season and higher in rainy season, the tidal property of being higher during spring tide and being lower during neap tide, and the spatial property of being higher at the east and west sides and being lower in the middle of the bay and of being higher in the near coast region and being lower in the offshore region. The direction of sediment transport per width was consistent with the residual current direction, which was offshore in dry season and onshore in rainy season. The result of transport dynamic analysis showed that the Eulerian residual current was the main control factor for suspended sediment transport, and that the direction and mass of sediment transportation were determined by the residual current, with the secondary control factors being vertical movement in deeper region and tidal pumping in shallow region.

Key words: Tuy Phong Bay, suspended sediment, tidal pumping effect, transport decomposition

CLC Number:

P731.2

YANG Yang, LI Rui-xiang, LIU Yu-qiang, ZHU Peng-li, LU Rong. Distribution and dynamic mechanism of suspended sediment in the Tuy Phong Bay[J].Journal of Tropical Oceanography, 2014, 33(6): 24-30.

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Distribution and dynamic mechanism of suspended sediment in the Tuy Phong Bay

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