Multivariable integrated risk and spatiotemporal characteristics assessment for water quality using comprehensive risk index in Jiangsu section of the south-to-north water diversion project, China.
Yue Zhang, Jun Hou, Rui Zhou, Jun Lu, Jun Xia, Jun Wu, Guoxiang You, Zijun Yang, Lingzhan Miao
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引用次数: 0
Abstract
Water quality serves as a key indicator for assessing the effectiveness and success of water diversion efforts, yet comprehensive assessments of water pollution risk across interbasin areas remain scarce. Therefore, considering water quality standards, water eutrophication, and drinking water safety, a comprehensive water quality risk inedx (CRI) was developed by integrating the Comprehensive Pollution Index (CPI), Eutrophication Index (TLI), and New Water Quality Index (NWQI). This framework was designed to determine the spatiotemporal risk levels at a spatial scale that crosses large river basins. The Jiangsu section, pivotal water supply source for the eastern route of the South-to-North Water Diversion Project (SNWDP-ER), was selected as the study area. In addition, based on the long-term (2003-2022) water quality monitoring data, multiple statistical methods were used to evaluate the effects of the SNWDP-ER on water quality within the lakes and main reaches of the Jiangsu Section. Variance analysis revealed significant differences in water quality pre- and post-water transfer and the operation of SNWDP-ER has contributed to the improvement of overall water quality. Principal Component Analysis (PCA) identified the predominant parameters affecting water quality was converted from CODMn to NH3-N and TP after water transfer and the main objective of water quality control in the study area is agricultural non-point source pollution. The comprehensive water quality risk assessment identified three groups with distinct risk levels and the impact of water transfer project on the water quality risk of reaches was gradually increasing from upstream to downstream. This study greatly enhanced our understanding of the impacts of large-scale water transfer projects on water quality and proposed a comprehensive framework for assessing spatiotemporal risk levels across extensive river basins.
期刊介绍：
Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people.
Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes.
The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.
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