TRANSPORT OF BICOMPONENT CONTAMINANT IN FREE-SURFACE WETLAND FLOW  

作　　者：CHEN Bin ZENG Li WU Yi-hong JI Ping ZHAO Yi-jun 

机构地区：[1]State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University [2]State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research

出　　处：《Journal of Hydrodynamics》2012年第6期925-929,共5页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.10972009,50939001and41271543);supported by the Special Foundation of China Institute of Water Resources and Hydropower Research(Contract No.SJ1239)

摘　　要：This paper presents a theoretical analysis of a pulsed bicomponent contaminant emission into a flee-surface wetland flow. The basic equations are for the bicomponent contaminant transport in the wetland flow under the combined action of advection, mass dispersion, and ecological reaction at the phase averaged scale. The effect of the ecological reaction is separated from the hydrodynamic effect via a set of widely used transforms. The analytical solution for the evolution of the depth-averaged concentration is rigorously derived, with a limiting case covering the known solution for the single component contaminant transport. It is found that the depth-averaged species concentration of the bicomponent contaminant can approach an equilibrium state determined by the distribution coefficient.This paper presents a theoretical analysis of a pulsed bicomponent contaminant emission into a flee-surface wetland flow. The basic equations are for the bicomponent contaminant transport in the wetland flow under the combined action of advection, mass dispersion, and ecological reaction at the phase averaged scale. The effect of the ecological reaction is separated from the hydrodynamic effect via a set of widely used transforms. The analytical solution for the evolution of the depth-averaged concentration is rigorously derived, with a limiting case covering the known solution for the single component contaminant transport. It is found that the depth-averaged species concentration of the bicomponent contaminant can approach an equilibrium state determined by the distribution coefficient.

关 键 词：contaminant dispersion bicomponent contaminant wetland hydrodynamics environmental risk assessment 

分 类 号：TV143[水利工程—水力学及河流动力学]