磨刀门口夏冬季沿岸流特征及成因分析

发布时间：2018-06-17 03:44

本文选题：沿岸流 + 磨刀门河口　；参考：《海洋学报》2017年05期

【摘要】：根据2011—2012年磨刀门口的夏、冬季大、中、小潮定点观测资料,对欧拉余流、斯托克斯余流以及拉格朗日余流进行分析。结果表明:(1)外海测点的欧拉余流和拉格朗日余流,冬季在各潮型下均为一致的西南沿岸方向,夏季除东、西汊道点在强径流下表现为顺汊道指向外海方向,其余外海各点仍以西南沿岸方向为主;(2)斯托克斯余流远小于欧拉余流,夏季明显大于冬季,方向基本与欧拉余流相反;(3)冬季磨刀门口海域具有稳定西南向沿岸流特征,南海东北季风的驱动作用是其形成的主要原因;夏季磨刀门口各潮型下沿岸流特征各异,其影响的主要因素为径流和风,同时地形的影响不可忽略,特别是拦门沙形成的汊道分流作用,对强径流作用下水沙输移影响十分显著。
[Abstract]:According to the observational data of large, middle and low tide in summer, winter and low tide in 2011-2012, the Euler residual current, Stokes residual current and Lagrangian residual current are analyzed. The results show that the Euler residual current and Lagrangian residual current in the offshore survey point are the same in winter along the southwest coast under all tidal patterns, except for the east and west branches in summer. The rest of the offshore points are still dominated by the southwest coast.) the Stokes residual current is much smaller than the Euler residual current, and the summer is obviously larger than the winter, and the direction is basically opposite to that of the Euler residual current. The driving effect of the northeast monsoon in the South China Sea is the main reason for its formation, and the characteristics of the coastal currents at the entrance of the mortars are different in summer, and the main factors are runoff and wind, and the influence of the topography can not be ignored. Especially, the distributary effect of the inlet formed by the blocking sand has a significant effect on the sewerage and sediment transport under the strong runoff.
【作者单位】：中山大学地理科学与规划学院;水利部珠江河口动力学及伴生过程调控重点实验室;珠江水利科学研究院;
【基金】：水利部公益性行业科研专项(201501010) 国家自然科学基金资助项目(51409286) 珠科院开放基金([2013]KJ05)
【分类号】：P731.2

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