Numerical simulation of pollution process due to resuspension of bed materials adsorbing pollutants in alluvial rivers  

作　　者：DING Yun XIAO Yang ZHONG DeYu 

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University [2]College of Water Conservancy and Hydropower Engineering, Hohai University [3]State Key Laboratory of Hydroscience and Engineering, Tsinghua University

出　　处：《Science China(Technological Sciences)》2015年第7期1280-1288,共9页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51109064);the State Key Program of National Science Foundation of China(Grant No.51239003);the National Basic Research Program of China("973"Project)(Grant No.2011CB403303)

摘　　要：Resuspension of bed materials absorbing pollutants potentially poses unpredictable challenges to water management in alluvial rivers and its mechanism of transport has not been widely recognized.In this study,a transport equation that defines the movement of pollutants adsorbed on the bed materials in the active bed layer is established,on the basis of mass conservation law and continuum theory.The transport equation is coupled into the 1-D mathematical model to numerically investigate water pollution process due to the scour of the bed sediment adsorbing pollutants.Comparisons with the situation in which the dynamics of the active bed layer is not considered indicate that the periodical evolution of the bed layer plays an innegligible role in the pollution process due to sediment re-suspension.Furthermore,comparisons of the results with available experimental observations are presented,and fairly good agreement is obtained.

关 键 词：RESUSPENSION POLLUTANTS alluvial rivers active bed layer 

分 类 号：X522[环境科学与工程—环境工程]