2010•Huadong Shifan Daxue xuebao. Ziran kexue banRequires access
Formation mechanism of Ruifeng Shoal ditch in the Yangtze River Estuary
LI Yu-zhong, Shenliang Chen
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Abstract
Based on history charts for the Yangtze River Estuary,formation mechanism of the Ruifeng Shoal ditch was analyzed.With the head part of the Shoal siltting southward,the upside mainstream direction turns southward in the South Channel.Bounced by southern bank,the mainstream will turn northward in the middle part of the South Channel and erode the lower part of the Ruifeng Shoal.Then a ditch on Ruifeng Shoal appears.In the end of 1990s,development of Baoshan North Channel and large amount of sediments from the Nanshatou Channel induced the siltation southward in the head part of the Shoal.The deduction was testified by the tidal current survey and the flow modeling.