Transport in a three-zone wetland: Flow velocity profile and environmental dispersion

被引：17
|
作者：
Wang, P. [1 ]
Chen, G. Q. [1 ,3 ]
Jiang, C. B. [2 ]
Alsaedi, A. [3 ]
Wu, Z. [1 ]
Zeng, L. [4 ]
机构：
[1] Peking Univ, Coll Engn, Beijing 100871, Peoples R China
[2] Tsinghua Univ, Dept Hydraul Engn, Beijing 100084, Peoples R China
[3] King Abdulaziz Univ, Fac Sci, NAAM Grp, Jeddah 21589, Saudi Arabia
[4] China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China
来源：
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION | 2015年 / 20卷 / 01期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Wetland; Flow; Dispersion; Multi-scale analysis; LONGITUDINAL DISPERSION; BOUNDARY-CONDITIONS; SHEAR DISPERSION; INTERFACE REGION; POROUS-MEDIUM; CHANNEL FLOW; VEGETATION; FLUID; TUBE; WALL;
D O I：
10.1016/j.cnsns.2014.04.025
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
To achieve better understanding of transport process in real waterways interacted with adjacent aquatic vegetation and riparian buffers, a three-zone model featuring the bank-effect is presented to character the water flow and environmental dispersion. Based on basic formulation in context of porous media flow, the velocity profile of a fully developed flow through the wetland is derived, with that for single zone and two-zone wetland flows recovered as special cases. The environmental dispersivity is determined by the approach of multi-scale analysis, with the effects of dimensionless parameters well illustrated. Application examples are provided to illustrate associated hierarchical structure for the critical length and duration of the contaminant cloud, and a comparison is made between the three-zone wetland and a corresponding three-layer wetland. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：136 / 153
页数：18
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