Development of a coupled model to simulate and assess arsenic contamination and impact factors in the Jinsha River Basin,China  

作　　者：Yidian Sun Xu Zhang Hong Peng Wenting Zhou Anna Jiang Feng Zhou Hao Wang Wanshun Zhang 

机构地区：[1]School of Resource and Environmental Sciences,Wuhan University,Wuhan 430079,China [2]School of Water Conservancy and Hydropower Engineering,Wuhan University,Wuhan 430072,China [3]China Institute of Water Resources and Hydropower Research,Beijing 100038,China [4]School of Water Resources and Hydropower,State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China

出　　处：《Journal of Environmental Sciences》2025年第1期50-61,共12页环境科学学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(No.2017YFC1502504);the National Natural Science Foundation of China(No.41877531).

摘　　要：With the increasing severity of arsenic(As)pollution,quantifying the environmental behavior of pollutant based on numerical model has become an important approach to determine the potential impacts and finalize the precise control strategies.Taking the industrialintensive Jinsha River Basin as typical area,a two-dimensional hydrodynamic water quality model coupled with Soil andWater Assessment Tool(SWAT)model was developed to accurately simulate the watershed-scale distribution and transport of As in the terrestrial and aquatic environment at high spatial and temporal resolution.The effects of hydro-climate change,hydropower station construction and non-point source emissions on Aswere quantified based on the coupled model.The result indicated that higher As concentration areas mainly centralized in urban districts and concentration slowly decreased from upstream to downstream.Due to the enhanced rainfall,the As concentration was significantly higher during the rainy season than the dry season.Hydro-climate change and the construction of hydropower station not only affected the dissolved As concentration,but also affected the adsorption and desorption of As in sediment.Furthermore,As concentration increased with the input of non-point source pollution,with the maximum increase about 30%,resulting that non-point sources contributed important pollutant impacts to waterways.The coupled model used in pollutant behavior analysis is generalwith high potential application to predict and mitigate water pollution.

关 键 词：Watershed system ARSENIC Modeling DISTRIBUTION Hydro-climate change Non-point source pollution 

分 类 号：X56[环境科学与工程—环境工程] X820.4