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地质通报  2007 

应用遥感方法分析珠江口伶仃洋的海岸线变迁及其环境效应

, PP. 215-222

Keywords: 海岸线变迁遥感珠江口伶仃洋

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Abstract:

对伶仃洋1979年以来利用多时相遥感影像提取的岸线进行分析,结合地形图,得到近几十年来海岸线变化的特征,认为南沙区和蛇口半岛是岸线变化最快的2个区,而淇澳岛区和交椅湾区的变化相对较小。南沙区岸线变迁以沉积作用和围海造地形成的岸线向海延伸为主,延伸速率从1966年至2000年明显增大,2000年后有减缓的趋势。蛇口半岛区主要以码头、池塘等人工建筑形成的岸线向海延伸为主。从岸线变迁、悬浮沉积物分布及其沉积作用来看,伶仃水道西侧以沉积为主,可能不适合于大规模的码头建设。珠江口岸线变迁最主要的环境效应是河道变窄、增长,造成排洪不畅,上游的洪涝灾害增多。

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