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杭州湾南岸庵东浅潍的地貌演变具有长周期、多年周期和年周期变化。浅滩舌部的进退、摆动,以及滩面高程和潮沟系统的变动,是周期性演变的主要表现。地貌过程各控制因素通过杭州湾湾口和湾顶两个高混浊带提供的输沙通道,以及浅滩输沙结构的调整,间接或直接影响浅滩的演变,出现各个层次的动力-地貌响应关系。其中长周期和多年周期响应与长江及钱塘江两河口系统的调整有关,枯水条件下河口系统上移,庵东浅滩供沙不足;丰水条件下,两输沙通道会于庵东浅滩,促进了浅滩的淤涨。在年周期的小尺度演变中,波浪条件具有重要的影响。
The evolution of the shallow Wei in the east of Hangzhou Bay is characterized by long period, multi-year period and annual period. Advances and retractions of the tongue of the shoals, swings, and changes in the tidal flat and tidal flats are the major manifestations of the cyclical evolution. Various controlling factors of the geomorphological process The sediment transport channels provided by the two high turbid belts in Hangzhou Bay Bay and Bay, and the adjustment of the sand transport structure, indirectly or directly affect the evolution of the shoals, resulting in the dynamical-topographical response at all levels. Among them, the long-period and multi-year period responses are related to the adjustment of the estuarine systems in the Yangtze River and the Qiantang River. In low-water conditions, the estuarine system moves upwards and the An Dong shoals provide insufficient sand. Under the condition of abundant water, Promote the bank of the siltation. In the small-scale evolution of annual cycles, wave conditions have a significant impact.