Spatial evolution and driving factors of surface water chemistry in the Duliujiang River Basin,Southwest ChinaOA
It is crucial to grasp the spatial evolution characteristics of water chemistry and to quantify the contribution rate of different factors for the precision management and secure utilization of water resources in the basin.In this study,river water samples were systematically collected from the Duliujiang River Basin,the concentrations of anions and cations were measured,and the spatial evolution characteristics and ion sources of the watershed were studied by using hydrochemical diagrams,multivariate mathematical statistics,and the absolute factor analysis-multiple linear regression receptor model(APCS-MLR),and the contribution rate of different sources to the hydrochemical components of the basin was quantified.The results indicate generally weakly alkaline water throughout the Duliujiang River Basin.While hydrochemical types exhibit spatial variability,the Ca-HCO_(3) type predominates.The chemical composition of river water in the Duliujiang River Basin is governed by rock weathering,cation alternating adsorption,mineral dissolution/precipitation,and anthropogenic influences,and the APCS-MLR model results show that mining wastewater discharge,rock and mineral dissolution,industrial activities,agricultural activities,and unidentified sources(inferred as groundwater recharge)are the main sources of river solutes.The contribution rates of municipal factors,mining factors,agricultural factors,geological factors,and unidentified factors to the river water were 16%,28%,19%,23%,and 14%,respectively,while the total contribution rate of anthropogenic factors(including municipal factors,mining factors,and agricultural factors)exceeded that of natural factors,reaching 58%,and have become the principal driving factors of hydrochemical evolution in the Duliujiang River Basin.
Zhiyong He;Hang Li;Zengping Ning;Jinshuai Fu;Yanqiong Luo;Qianchen Liu;Wenjia Lu;Yizhang Liu;Jing Sun;Chengshuai Liu
College of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404000,China State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaCollege of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404000,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China College of Eco-Environmental Engineering,Guizhou University,Guiyang 550025,ChinaCollege of Environmental and Chemical Engineering,Chongqing Three Gorges University,Chongqing 404000,China State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,ChinaState Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China
天文与地球科学
Water chemistry characteristicsIon sourceChemical weatheringAnthropogenic factorAPCS-MLR modelDuliujiang River Basin
《Acta Geochimica》 2026 (2)
P.314-330,17
supported by the Guizhou Provincial Major Scientific and Technological Program(No.[2024]013)the National Natural Science Foundation of China(U21A2034)the Independent deployment project of State Key Laboratory of Environmental Geochemistrythe Regional Development Young Scholars Program,Chinese Academy of Sciences。
评论