Abstract: The Jiangsu coast area is controlled by the East China Sea progressive tidal wave and the Southern Yellow Sea rotary tidal wave.The two tidal wave systems coming from the opposite direction converge near the middle of a radiative sandy ridge.Under this special hydrodynamic condition,a large geomorphologic dynamic response system is formed in the tiaozini sandbank which is named Erfenshui water-dividing beach ridge.Using in situ measurements and some remote sensing satellite images,this paper discusses the g...