Abstract
Based on the formation structure and status of land use, sampling, and analysis to determine the water quality in eastern suburbs of Guilin City, there are 27 samples include surface and groundwater. The results showed that there was serious nitrate pollution of groundwater in the area belonging to class III groundwater standards, not suitable for drinking. Twenty-six percent of the samples exceed the drinking water NO3--N content standards of the World Health Organization (N 10 mg/L). And different land use types had different NO3--N levels (N 0.088~46.7 mg/L). The main NO3--N pollution sources in shallow groundwater was domestic sewage. Point source pollution also existed in residential areas, such as pig farms; organic fertilizer applied for planting vegetables was the NO3--N sources of pollution in the agricultural area.
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We would like to thank the chief editor, associate editor, and anonymous reviewers for their constructive comments and suggestions for improving the quality of this paper.
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This work was supported by the National Natural Science Foundation of China (no. 41572242, 41102161), the Shandong Provincial Natural Science Foundation (no. ZR2019QEE036), and the Ministry of Water Resources Special Funds for Scientific Research on Public Welfare (no. 201401003).
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Wang, K., Chen, H., Li, F. et al. Spatial distribution characteristics of nitrogen pollution in a typical karst groundwater system. Arab J Geosci 13, 351 (2020). https://doi.org/10.1007/s12517-020-05401-y
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DOI: https://doi.org/10.1007/s12517-020-05401-y