Environmental dispersion in a two-layer wetland: Analytical solution by   method of concentration moments

doi:10.1016/j.ijengsci.2011.09.009

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	Environmental dispersion in a two-layer wetland: Analytical solution by method of concentration moments
	Chen, G. Q. ; Wu, Zi ; Zeng, L.
刊名	international journal of engineering science
	2012
关键词	Wetland Environmental dispersion Environmental risk assessment Concentration moment method Analytical solution CONSTRUCTED WETLAND BOUNDARY-CONDITIONS TAYLOR DISPERSION SHEAR DISPERSION INTERFACE REGION POROUS-MEDIUM PACKED TUBE FLOW FLUID CHANNELS
DOI	10.1016/j.ijengsci.2011.09.009
英文摘要	For the most typical two-layer wetland with free-water-surface-effect, analytically explored in this paper is the environmental dispersion in terms of the longitudinal evolution of the depth-averaged concentration. Taylor's classical analysis for soluble matter dispersion in a single phase fluid flow is rigorously generalized for the two-layer case of a wetland flow to develop the dispersion model. The velocity profile of the fully developed flow through the wetland is derived, with that for the single-layer wetland flow included as a special case. Aris's method of concentration moments is applied to determine the dispersivity with an asymptotic time variation. For typical contaminant constituents of chemical oxygen demand, biochemical oxygen demand, total phosphorus, total nitrogen and heavy metal, the process of dispersion is shown characteristic of a hierarchical structure in the critical length and duration of the contaminant cloud. (C) 2011 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000300466700019&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Multidisciplinary; SCI(E); EI; 33; ARTICLE; 272-291; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154648]
专题	工学院
推荐引用方式 GB/T 7714	Chen, G. Q.,Wu, Zi,Zeng, L.. Environmental dispersion in a two-layer wetland: Analytical solution by method of concentration moments[J]. international journal of engineering science,2012.
APA	Chen, G. Q.,Wu, Zi,&Zeng, L..(2012).Environmental dispersion in a two-layer wetland: Analytical solution by method of concentration moments.international journal of engineering science.
MLA	Chen, G. Q.,et al."Environmental dispersion in a two-layer wetland: Analytical solution by method of concentration moments".international journal of engineering science (2012).