江苏岸外沙脊群的地貌形态及动力格局

长江与黄河的交互作用为江苏岸外沙洲提供了丰富的泥沙来源，而两大潮波的辐聚以及辐合带的迁移则是将整个岸外沙脊群塑造成辐射形态的动力因素。以蒋家沙为界，江苏岸外沙洲的辐射形具有南北不对称的特点。两河供沙条件的差异是形成南北两翼沙洲规模大小的原因，发育历史或调整时间的长短则是决定南北两翼沙洲相对稳定程度的原因。

GEOMORPHOLOGY RESPONSES ON DYNAMICS PATTERN OF JIANGSU OFFSHORE SANDBANKS, EASTERN CHINA

Studies suggest that abundant sediment of Jiangsu offshore sandbanks is supplied by Huanghe River and Changjiang River n different period. Nevertheless, Two tide wave systems, i.e., the East China Sea progressive tidal wave and southern Huanghai Sea rotatory tidal wave, meet near Tiaozini which is the center of the offshore sandbanks. Such hydrodynamics are the main factors to mold the sandbanks a radial shape. The whole sandbanks can be divided into two parts by Jiangjia Sha, the north and the south sandbanks, which they are asymmetry. It can be concluded that the varied volumes of the two parts are governed by the quantities of supplied sediment, and their stability during their growing time. The north part is bigger due to the lager sediment supplied by Huanghe River and unstability associated with shorter evolution period than the south.