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	Two-dimensional composite mathematical alluvial model for the braided reach in the Lower Yellow River
	Wang, GQ ; Xia, JQ ; Wu, BS
	2010-05-11 ; 2010-05-11
关键词	the Lower Yellow River braided reach bank erosion flood routing fluvial processes 2D composite alluvial model STABILITY ANALYSIS Engineering, Civil Water Resources
中文摘要	The fluvial processes are considerably complicated in the braided reach of the Lower Yellow River and the lateral or transverse channel deformation process is especially pronounced. The state-of-the-art of simulation techniques for the channel deformation in the Lower Yellow River was analyzed in this paper and such a conclusion was drawn that existing mathematical alluvial models only can simulate the longitudinal channel deformation and cannot simulate such the lateral deformation as lateral erosion and failure of bank. Then a new two-dimensional (2D) composite model was developed herein, consisting of a 2D flow and sediment transport submodel and a riverbank-erosion submodel. This model not only can simulate the longitudinal and lateral channel deformations, but also can be used to simulate the fluvial processes of natural alluvial rivers with complex bed morphology. Through using the proposed composite model, the flood routing and channel deformation processes during the August 1982 flood were simulated. The maximum stage along the reach and the discharge hydrograph at the outlet so obtained were in good agreement with the observed data. Simulated results of the channel deformation processes showed that during the flood season, the main channel scours and the flood plain deposits; during the dry season, the main channel deposits and banks of the floodplain retreat due to lateral erosion by the flow and failure under gravity. Such results accord with the annual varying law of bed scouring and deposition in the braided reach.
语种	英语 ; 英语
出版者	INT WATER RESOURCES ASSOC ; CARBONDALE ; SOUTHERN ILLINOIS UNIV, 4535 FANER HALL, MC 4516, CARBONDALE, IL 62901-4516 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/27322]
专题	清华大学
推荐引用方式 GB/T 7714	Wang, GQ,Xia, JQ,Wu, BS. Two-dimensional composite mathematical alluvial model for the braided reach in the Lower Yellow River[J],2010, 2010.
APA	Wang, GQ,Xia, JQ,&Wu, BS.(2010).Two-dimensional composite mathematical alluvial model for the braided reach in the Lower Yellow River..
MLA	Wang, GQ,et al."Two-dimensional composite mathematical alluvial model for the braided reach in the Lower Yellow River".(2010).

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