Coastal Erosion Induced by Human Activities: A Northwest Bohai Sea Case Study

Autor:	Zuo Xue, Dongxing Xia, Aiping Feng, Ping Yin
Rok vydání:	2009
Předmět:	Hydrology Coastal hazards Ecology Storm surge Sediment humanities Coastal erosion parasitic diseases Erosion Coastal engineering Sedimentary budget Sediment transport geographic locations Geology Earth-Surface Processes Water Science and Technology
Zdroj:	Journal of Coastal Research. 253:723-733
ISSN:	1551-5036 0749-0208
DOI:	10.2112/07-0959.1
Popis:	Using mooring hydrodynamic observation, cross-shore profiles, and topographic-map and satellite-image comparisons, this study shows dramatic coastal erosion on the Qinhuangdao coast (northeast Bohai Sea, China) between 1986 and 2000, with an average retreat rate of 3.7 m/y. While the retreat rate during 1996–2003 decreased to 1.5 m/y, serious coastal erosion was found around river mouths, such as the Tang, Dai, Yang, Dapu, and Renzaohe Rivers, as well as Qilihai Lagoon, with the maximum of >7.0 m/y. Sediment starvation induced by dams mainly caused this fast coastal retreat. Sediment flux of the Luan River, the dominant fluvial sediment source in the study area, declined to only 9.0% of the levels before the impoundment of two large dams in 1979. Sharply reduced sediment supply disrupted the stability of sediment transport as well as the beaches' self-recovery processes after storm surges. Coastal erosion was further intensified by coastal engineering and tourism activities.
Databáze:	OpenAIRE
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