Multi-scale analysis for environmental dispersion in wetland flow

被引：72
|
作者：
Wu, Zi [1 ]
Li, Z. [1 ]
Chen, G. Q. [1 ]
机构：
[1] Peking Univ, State Key Lab Turbulence & Complex Syst, Coll Engn, Beijing 100871, Peoples R China
来源：
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION | 2011年 / 16卷 / 08期
基金：
美国国家科学基金会;
关键词：
Wetland flow; Environmental dispersion; Multi-scale analysis; EMERGENT VEGETATION; DIFFUSION; PREDICTION; TRANSPORT; CHANNELS; MODEL;
D O I：
10.1016/j.cnsns.2010.12.002
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
Presented in this work is a multi-scale analysis for longitudinal evolution of contaminant concentration in a fully developed flow through a shallow wetland channel. An environmental dispersion model for the mean concentration is devised as an extension of Taylor's classical formulation by a multi-scale analysis. Corresponding environmental dispersivity is found identical to that determined by the method of concentration moments. For typical contaminant constituents of chemical oxygen demand, biochemical oxygen demand, total phosphorus, total nitrogen and heavy metal, the evolution of contaminant cloud is illustrated with the critical length and duration of the contaminant cloud with constituent concentration beyond some given environmental standard level. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：3168 / 3178
页数：11
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