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Multiple assessments, source determination, and health risk apportionment of heavy metal(loid)s in the groundwater of the shule river basin in northwestern China

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Journal of Arid Land 2023年第11期15卷 1355-1375页

作者： WEN Xiaohu LI Leiming WU Jun LU Jian SHENG Danrui Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Yantai Research Institute Harbin Engineering UniversityYantai 264006China Shandong Key Laboratory of Coastal Environmental Processes/CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Chinese Academy of SciencesYantai 264003China

Global ecosystems and public health have been greatly impacted by the accumulation of heavy metal(loid)s in ***-specific risk apportionment is needed to prevent and manage potential groundwater contamination with heavy metal(loid)*** heavy metal(loid)s contamination status,water quality,ecological risk,and health risk apportionment of the shule river basin groundwater are poorly ***,field sampling was performed to explore the water quality and risk of heavy metal(loid)s in the groundwater of the shule river basin in northwestern China.A total of 96 samples were collected from the study area to acquire data for water quality and heavy metal(loid)s *** was noticeable accumulation of ferrum in the groundwater of the shule river *** levels of pollution were considered to be moderately low,as evaluated by the degree of contamination,heavy metal evaluation index,heavy metal pollution index,and Nemerow pollution *** ecological risks were also ***,an assessment of the water quality index revealed that only 58.34%of the groundwater samples had good water *** absolute principal component scores-multiple linear regression model was more suited for this study area than the positive matrix factorization *** were no obvious noncarcinogenic or carcinogenic concerns for all types of receptors according to the values of the total hazard index and total carcinogenic *** human activities and the initial geological environment factor(65.85%)was the major source of noncarcinogenic risk(residential children:87.56%;residential adults:87.52%;recreational children:86.77%;and recreational adults:85.42%),while the industrial activity factor(16.36%)was the major source of carcinogenic risk(residential receptors:87.96%;and recreational receptors:68.73%).These findings provide fundamental and crucial information for reducing the health issues caused by heavy metal(loid)s contamination of groundwater in arid areas.

关键词： groundwater heavy metal(loid)s ecological risk health risk shule river basin

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Distribution of isotopes and chemicals in precipitation in shule river basin,northwestern China:an implication for water cycle and groundwater recharge

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Journal of Arid Land 2016年第6期8卷 973-985页

作者： ZHAO Wei MA Jinzhu GU Chunjie QI Shi ZHU Gaofeng HE Jiahua Key Laboratory of Western China’s Environmental Systems (Ministry of Education) College of Earth Environmental SciencesLanzhou University

The distribution of stable isotopes and ions in precipitation in the shule river basin, northwestern China, were investigated to understand the regional water cycle and precipitation input to groundwater recharge. The study found that the mean annual concentrations of Ca2＋, Na＋, SO42-, CI-, Mg2＋, NO3-, and K＋ in the basin were lower than those in other arid areas of northwestern China. The average concentrations of ions in the lower reaches of the shule river were higher than those in the upper reaches. The results showed that the main ionic concentrations decreased with the increase of precipitation amount, indicating that heavy precipitation cannot only wash crustal aerosols out of the atmosphere, but also create a dilution effect. CI- and Na＋ in precipitation had a strong and positive correlation, suggesting a common origin for the two ions. However, the excess of Na＋, combined with non-marine SO42- and NO3-, indicated that some ions were contributed by terrestrial origins. In the extremely arid regions of northwestern China, the evaporation process obviously changes the original relationship between δ2H and δ18O in precipitation, and leads to dexcess values 〈8‰. δ18O and temperature were significantly correlated, suggested that temperature strongly affected the characteristics of isotopes in the study area. The δ18O value indicates a dominant effect of westerly air masses and southwest monsoon in warm months, and the integrated influence of westerly and Siberian-Mongolian polar air masses in cold months. The d-excess values were generally lower in warm months than those in cold months, indicating that post-condensation processes played a significant role in the water cycle. The results provide reliable precipitation input information that can be used in future groundwater recharge calculations in the study area.

关键词： precipitation stable isotopes ions westerly air masses shule river basin

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Study on functions and rational allocation of shule river basin groundwater resources

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Journal of Groundwater Science and Engineering 2017年第2期5卷 140-151页

作者： CHENG Xu-xue JIN Xiao-lin LIU Wei-po Center for Hydrogeology and Environmental Geology CGS

Based on Investigation and Assessment on Rational Exploitation and Utilization of Groundwater Resources in Typical Areas of the Hexi Corridor, the thesis studies on groundwater and environmental problems arising from the large-scale agricultural development projects in shule river basin. The thesis analyzes problems in exploiting and utilizing water resources, defines the function zoning of groundwater resources in key areas and evaluates them. Finally, the thesis uses three-dimensional unsteady flow simulation and regional social and economic development plan to study on the allocation of groundwater in shule river basin. A proposal for rational allocation of shule river basin water resources has been put forward.

关键词： shule river basin The function zoning Assessment of groundwater resources Rational allocation of water resources

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