长江湖口—彭泽段江岸的变化及其对防洪安全影响

BANK CHANGING AND IT'S INFLUENCE ON THE SECURITY OF FLOOD CONTROL IN HUKOU-PENGZE IN THE YANGTZE RIVER

根据历史记载、遥感资料解释和野外现场调查,对长江湖口—彭泽县段江岸冲淤变化,及江中主要江心洲的变迁进行研究,该江段历史变化较复杂,但是总体是河流主流的“S”摆动,主流不断南迁总体南岸以侵蚀为主,北岸以淤积为主,在棉船洲地区由于该洲向北生长,则以北岸侵蚀为主。最后分析江岸变化对防洪安全的影响,江岸变化是重要的致灾因子。

From historical records, and by remote sensing explanation and field investigation, the paper studied on the Yangzte river＇s scour/siltation changing and its main river islands changing in Hukou--Pengze section. Historical changing was complicated in this section, but generally the mainstream appeared in ＂S＂ swing. The mainstream moves to the south bank all the time so that the south bank undergoes erosion and the north bank silting. However, these erosion and silting is in the other way round in Mianchuanzhou area because Mianchuanzhou,a river island, increase in its body in the N side. It is suggested that river bank changing is the important disastrous factors.