Environmental Research of Groundwater Chemical Composition and Pollution Characteristics in Tongchuan City, China

Yuxi Zhang, Jingtao Liu, Jiansheng Shi, Yuanjing Zhang, Xiaoping Xiang

Ekoloji, 2019, Issue 107, Pages: 1107-1114, Article No: e107130


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The investigation and assessment of groundwater chemistry and quality is a hot topic worldwide, triggering international attention from both researchers and policy makers due to its relevant link with environmental objectives and regional development. To master quality and pollution status of groundwater in Tongchuan City, China, 39 sets of groundwater samples were collected, and 17 inorganic conventional indicators, 9 inorganic toxicological indicators and 39 trace organic indicators were analyzed. Groundwater quality and pollution were assessed by “hierarchy step evaluation method”. The results show that shallow water in Tongchuan City was in relatively poor quality in 2011. The samples that can be directly consumed or drunk after proper treatment account for 60% of the total, while 40% samples cannot be drunk. Shallow water quality is subjected to common influence of natural background and human activities, with total hardness, NO3-, SO42- as the main influence indicators. Deep water is in relatively good quality, and water in all sampling points can be directly consumed or drunk after proper treatment. Deep water is mainly affected by natural background, with Fe as the main influence indicator. The results of pollution assessment show that the shallow water samples with pollution at levels 1, 2, 3, and 4 account for 44%, 16%, 32%, and 8% of the total, and the pollution is mainly distributed in Qishui River valley in the south of Jinsuoguan and north of Chuankou. The deep water pollution level is at level 1 without influence of human pollution.


Tongchuan City, groundwater, hierarchy step evaluation method, pollution, environmental objectives


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