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本文分析了江苏沿岸辐射状沙脊区的水动力条件及波浪、潮汐、潮流、海流(余流)等动力要素在辐射状沙脊的形成、发育中所起的作用。指出潮汐、潮流是形成沙脊最重要的动力因素。阐述了在潮汐、潮流作用下辐射状沙脊形成、发育的过程。得出江苏沿岸辐射状沙脊群是现代水动力——主要为潮汐、潮流作用下的堆积地貌的结论。 另外,本文还分析了辐射状沙脊的物质是由老黄河、古长江提供的,覆叠着老黄河物质的古长江水下三角洲是沙脊群发育的基底。
This paper analyzes the hydrodynamic conditions and the role of hydrodynamic factors such as wave, tide, tidal current and ocean current (residual current) in the formation and development of radial sand ridge along the radial sandy ridge of Jiangsu Province. Pointed out that the tide, the tide is the most important driving force forming the sand ridge. The process of formation and development of radial sand ridge under tidal and tidal current is expounded. It is concluded that the radiant sand ridges on the coast of Jiangsu are the result of modern hydrodynamics, mainly tidal and tidal current. In addition, the article also analyzes the radial sand ridge material is provided by the old Yellow River, the ancient Yangtze River, covered with the Old Yellow River sediment sub-delta of the ancient Yangtze River is the base of sand ridge development.