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Vulnerability of coastal lowlands. A case study of land subsidence in Shanghai, P.R. China
Baeteman, C. (1990). Vulnerability of coastal lowlands. A case study of land subsidence in Shanghai, P.R. China, in: Paepe, R. et al. Greenhouse Effect, Sea Level and Drought. Proceedings of the NATO Advanced Research Workshop on Geohydrological Management of Sea Level and Mitigation of Drought, Fuerteventura, Canary Islands (Spain), March 1-7, 1989. NATO ASI Series C: Mathematical and Physical Sciences, 325: pp. 415-426. http://dx.doi.org/10.1007/978-94-009-0701-0_23
In: Paepe, R. et al. (Ed.) (1990). Greenhouse Effect, Sea Level and Drought. Proceedings of the NATO Advanced Research Workshop on Geohydrological Management of Sea Level and Mitigation of Drought, Fuerteventura, Canary Islands (Spain), March 1-7, 1989. Digitized reprint of the hardcover 1st edition 1990. NATO ASI Series C: Mathematical and Physical Sciences, 325. Kluwer Academic Publishers: Dordrecht. ISBN 978-94-009-0701-0. xix, 718 pp. http://dx.doi.org/10.1007/978-94-009-0701-0, meer
In: NATO ASI Series C: Mathematical and Physical Sciences. D. Reidel: Dordrecht; Boston; Lancaster. ISSN 0258-2023, meer
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Documenttype: Congresbijdrage
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| Abstract |
Groundwater withdrawal caused drastic land subsidence in Shanghai, located in the Changjiang (Yangtze) coastal plain. Geological investigations, focusing on the need of a 3-dimensional approach, were carried out in the framework of the design of a mathematical model aiming at the management of land subsidence. The research was based on sedimentary environmental interpretation with special emphasis on the coastal processes involved.The compaction of the sediments, due to groundwater, is occurring mainly in the upper 70 m deposits, belonging to the late Pleistocene and Holocene. The upper Pleistocene deposits consist of a sequence showing the transition from an estuarine to a proper fluvial environment reflecting the end of a transgressive phase followed by a regressive phase. In the Holocene, although characterized by the post-glacial sea level rise, the coastal processes were dominated by a huge sediment supply from the Changjiang and Huanghe rivers. This resulted initially in a considerable salt marsh deposit followed by tidal flat deposits characterized by coastal progradation. |
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