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Hydrochemical characteristics and formation mechanisms of groundwater in west Zoucheng City, Shandong Province, China

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Abstract

Groundwater is an important water source for domestic, industrial, and agricultural use in the western part of Zoucheng, China. Understanding its hydrochemical characteristics and formation mechanisms is important for the sustainable development and utilization of groundwater. In this study, 36 water samples were collected during the wet and dry seasons, respectively, and the hydrochemical components such as K+, Na+, Ca2+, Mg2+, Cl, SO42−, HCO3, NO3, F, TH, and TDS were analyzed. A graphical method, correlation analysis, and principal component analysis were applied to explore the hydrochemical characteristics and evolution mechanisms of groundwater in the study area. The results show that the orders of the anion and cation concentrations of karst groundwater and pore groundwater are Ca2+  > Na+  > Mg2+  > K+ and HCO3  > SO42−  > Cl  > NO3  > F, respectively. On the whole, the karst groundwater quality is better than the pore groundwater quality, which in turn is better than the surface water quality. In addition, water quality in the dry season is better than water quality in the wet season for all the three water sources. The hydrochemical types of groundwater are complex and changeable. Compared with dry seasons, HCO3 and SO4 type water increase during the wet seasons, while the Cl type and Mg type water decrease. Na type is significantly more prevalent in pore groundwater than in karst groundwater. The chemical formations of karst groundwater and pore groundwater in the dry and wet seasons are mainly affected by water–rock interactions and human activities.

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The authors declare that the data supporting the findings of this study are available within the article.

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Funding

This research is funded by the National Natural Science Foundation of China (Grant No. 42027806) and the Survey and Evaluation of Groundwater Sources Project in Shandong Province (Ludihuan (2016) No. 02).

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Correspondence to Jiading Wang.

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Chen, H., Wang, J., Zhang, F. et al. Hydrochemical characteristics and formation mechanisms of groundwater in west Zoucheng City, Shandong Province, China. Environ Monit Assess 194, 573 (2022). https://doi.org/10.1007/s10661-022-10136-2

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  • DOI: https://doi.org/10.1007/s10661-022-10136-2

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