Formation and Evolution of the Jiuduansha Shoal over the Past 50 Years
Publication: Journal of Hydraulic Engineering
Volume 135, Issue 9
Abstract
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.
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Acknowledgments
This work was partly supported by the National Key Basic Research and Development Program (Grant No. UNSPECIFIED2003CB415206), Doctoral Fund of Qufu Normal University, and the National Natural Science Foundation of China (Grant No. NNSFC40576042).
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 135 • Issue 9 • September 2009
Pages: 741 - 754
Copyright
© 2009 ASCE.
History
Received: Aug 9, 2006
Accepted: Apr 24, 2009
Published online: Aug 14, 2009
Published in print: Sep 2009
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