Development and application of a new random walk model to simulate the transport of degradable pollutants  

作　　者：Lin Zhang Li-na Chen Jian-yin Zhou Jia-sheng Wang Qi-hong Yang Long-xi Han 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry Education,Hohai University,Nanjing 21009&China [2]College of Environment,Hohai University,Nanjing 210098,China [3]Changjiang River Scientific Research Institute,Wuhan 430010,China [4]College of Agricultural Science and Engineering,Hohai University,Nanjing 210098,China [5]Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention,Wuxi 214064,China [6]Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology,Jiangsu Institute of Parasitic Diseases,Wuxi 214064,China

出　　处：《Journal of Hydrodynamics》2020年第4期784-789,共6页水动力学研究与进展B辑（英文版）

基　　金：Supported by the National Key Research and Development Program of China(Grant No.2018 YFC0407803);the National Natural Science Foundation of China(Grant No.51679009).

摘　　要：To simulate the pollutant transport with seif-purification in inland waters,the widely used random walk model(RWM)is modified to include a source term for the degradation and to consider the impact of land boundaries.The source term for the degradation is derived from the assumption of the first-order reaction kinetics.Parameters for the new model are determined by a comparison to the analytical results.The proposed model is then applied to simulate and analyze the transport of a test pollutant and its spatial distribution in a large reservoir in northeast China.Reasonable results are obtained,and the effects of the runoff,the flow structure,and the wind on the pollutant transport are analyzed.The results may help the risk assessment and the management of the water pollution in inland waters.

关 键 词：Degradable pollutants inland water Lagrangian method random walk model 

分 类 号：X52[环境科学与工程—环境工程]