Formation and Evolution of the Jiuduansha Shoal over the Past 50 Years
Formation and Evolution of the Jiuduansha Shoal over the Past 50 Years
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DOI：
10.1061/(asce)0733-9429(2009)135:9(741
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发表时间：
2009-08
影响因子：
2.4
通讯作者：
Xiaoping Xie;Zhaoyin Wang;C. Melching
中科院分区：
文献类型：
--
作者：
Xiaoping Xie;Zhaoyin Wang;C. Melching
本文对九段沙浅滩近50年来的形成和地貌演化进行了研究。利用1945 ~ 2001年数字化海图、1975 ~ 2001年卫星影像和2003年枯水期春潮-小潮周期野外调查资料，分析了长江口九段沙浅滩的沉积过程、形成及地貌演化。对2003年春小潮周期干、汛期北、南通道的悬沙浓度和水动力进行了研究，分析了九段沙浅滩南北通道的相互关系。结果表明，流域输沙量的季节性和春季潮小潮周期变化与九段沙浅滩的侵蚀和沉积相对应。研究结果和数据可为长江口的管理和河口滩涂生态的恢复提供参考。
The formation and geomorphic evolution of the Jiuduansha Shoal are investigated over the past 50 years in this paper. The sedimentary processes, formation, and geomorphic evolution of the Jiuduansha Shoal in the Yangtze River Estuary, eastern China, are analyzed based on digitized sea maps from 1945 to 2001, satellite images from 1975 to 2001, and field survey data in the spring-neap tidal cycle in the dry and flood seasons in 2003. The suspended sediment concentration and hydrodynamics of the North Passage and South Passage during the dry and flood seasons in the spring-neap tidal cycle in 2003 were investigated, and relations between the North Passage and South Passage of the Jiuduansha Shoal are analyzed. Results show that seasonal and spring-neap tidal cycle variations in sediment and water discharge from the drainage basin correspond to erosion and deposition on the Jiuduansha Shoal. The results and data can provide useful information for the management of the Yangtze River Estuary and restoration of the estuarine tidal flat ecology.