Influence of coal mining on regional karst groundwater system: a case study in West Mountain area of Taiyuan City,northern China |
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| Authors: | Xiaojuan Qiao Guomin Li Ming Li Jinlong Zhou Jie Du Chengyuan Du Zhonghui Sun |
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| Institution: | (1) Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing, 100029, China;(2) Taiyuan Water Resources Bureau, Taiyuan, Shanxi Province, 030002, China; |
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| Abstract: | Karstic limestone formations in the West Mountain area are important water resources for Taiyuan City in Shanxi Province,
northern China, which is also known for its large-scale coal mining production. In this study area, groundwater is not only
exploited for water supply purposes but also drained because of coal mining. The process of coal mining changes both the quantity
of the karst springs and the quality of karst groundwater system because of overexploitation and overdrainage. In this paper,
the influence of coal mining on the groundwater is analyzed from a qualitative and quantitative perspective. The hydrochemical
analysis results reflect the relationship of the recharge, runoff, and drainage; the features of the medium; and water-rock
interactions. Based on a qualitative understanding of the geological deposition and characteristics of the groundwater flow
system, three-dimensional groundwater flow models are established and applied to several scenarios to explore the quantitative
influence and allow better protection of the groundwater environment and better utilization of water resources. |
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