Geomorphological changes of the Oosterschelde tidal system during and after the implementation of the delta project

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	Geomorphological changes of the Oosterschelde tidal system during and after the implementation of the delta project
	Teunis Louterst ; Jan H. van den Bergt ; Jan P.M. Mulder
发表期刊	Geomorphological Changes in the Oosterschelde Basin
	1998
卷号	14 期号:3 页码:1134-1151
关键词	Coastal Engineering Human Impact Tidal Inlet System Estuaries Geomorphology.
英文摘要	LOUTERS, T.; VAN DEN BERG, J.H., and MULDER, J.P.M., 1998. Geomorphological Changes of the Oosterschelde Tidal System During and After the Implementation of the Delta Project. Journal of Coastal Research, 14(3), 1134- 1151. Royal Palm Beach (Florida), ISSN 0749-0208. The Dutch Delta project, initiated in 1959 for the protection of the south-western Netherlands, reached its conclusion in 1987 with the completion of the Oosterschelde project: an open storm surge barrier and the Oesterdam and Phi- lipsdam in the landward parts of the Oosterschelde basin. The Delta project has increasingly influenced the tidal characteristics of the various basins in the area. The Oosterschelde basin was showing a tendency towards erosion until ca. 1980, when the Oosterschelde project was launched. Completion of this project in 1987 caused enormous changes in hydraulic conditions and initiated a large-scale transformation in the geomorphology of the Oosterschelde tidal basin and ebb tidal delta. Since 1987, the tidal prism (ebb or flood volume) has decreased by 30% and the average tidal range by 12%. Tidal current velocities have generally declined by 20-40% in the western and central parts of the Oosterschelde, and by as much as 80-100% near to the closure dams in the landward end of the basin. Conse- quently, sediment export from the basin towards its ebb tidal delta has ceased. In response to these changes, the sediments in the deeper parts of the tidal channels are now tending to be composed increasingly of silt and mud, while the tidal shoals and salt-marshes are showing distinct erosion. To establish a new dynamic equilibrium between hydraulic conditions and geomorphology will require an import into the basin of 400-600 million m3 sediment. The adaptation process will take centuries, if not longer.
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/4547
专题	科研共享资源
推荐引用方式 GB/T 7714	Teunis Louterst,Jan H. van den Bergt,Jan P.M. Mulder. Geomorphological changes of the Oosterschelde tidal system during and after the implementation of the delta project[J]. Geomorphological Changes in the Oosterschelde Basin,1998,14(3):1134-1151.
APA	Teunis Louterst,Jan H. van den Bergt,&Jan P.M. Mulder.(1998).Geomorphological changes of the Oosterschelde tidal system during and after the implementation of the delta project.Geomorphological Changes in the Oosterschelde Basin,14(3),1134-1151.
MLA	Teunis Louterst,et al."Geomorphological changes of the Oosterschelde tidal system during and after the implementation of the delta project".Geomorphological Changes in the Oosterschelde Basin 14.3(1998):1134-1151.

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