Since Jinci spring ceased to flow on April 30, 1994, it has never been reflowed, which seriously affects the sustainable utilization of karst groundwater. The purpose of this paper is to provide the basis for the reflow of Jinci spring and the sustainable protection for karst groundwater. Based on the long-term monitoring data from 1994 to 2014, this paper accurately quantifies the changes in the quantity and hydrochemistry of karst groundwater resources. By means of the Mann–Kendall trend test method, this paper analyzes the variation trends of karst groundwater level, EC, and SO₄²⁻ in Jinci spring catchment. Monitoring data show that the groundwater level in the karst aquifer declined by 2.32 m from 1994 to 2008, which is equivalent to a loss of 3.3 Mm³ in aquifer storage, while the groundwater level rose by 17.67 m from 2009 to 2014, which constitutes a gain of 25.2 Mm³. The results indicate that (1) karst groundwater level showed a rising trend, which was mainly controlled by the rainfall, exploitation of karst groundwater, and the Fenhe River leakage; (2) groundwater salinity varied greatly and showed an increasing trend: increasing order of 47.83% for the six major ions, 37.52% for EC, and 3.34% for pH; (3) the increase of groundwater salinity is governed by the increase in rainfall salinity, the increase in groundwater runoff time, the recharge of the Fenhe River to groundwater, the increase of sewage in spring catchment, and the ease of solubility of carbonate rocks. The results of this study are of great significance for predicting the groundwater level and salinity of karst aquifer and ensuring the safety of drinking water in Jinci spring catchment.

中文翻译：

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山西晋ci春季流域喀斯特地下水位和水化学变化的定量研究

自从1994年4月30日晋ci泉停止流水以来，就一直没有回流，严重影响了岩溶地下水的可持续利用。本文的目的是为晋ci泉的回流和岩溶地下水的可持续保护提供基础。基于1994年至2014年的长期监测数据，本文准确地定量了岩溶地下水资源的数量和水化学变化。通过Mann-Kendall趋势测试方法，分析了晋spring春季流域喀斯特地下水位，EC和SO ₄ ^2-的变化趋势。监测数据显示，从1994年到2008年，喀斯特含水层的地下水位下降了2.32 m，相当于损失了3.3 Mm ³从2009年到2014年，地下水位上升了1767万，增加了25.2 Mm ³。结果表明：（1）喀斯特地下水位呈上升趋势，主要受降雨，喀斯特地下水开发和the河渗漏的控制；（2）地下水盐度变化较大，呈上升趋势：六种主要离子的上升顺序为47.83％，EC的上升顺序为37.52％，pH值为3.34％。（3）地下水盐分的增加取决于降雨盐分的增加，地下水径流时间的增加，the河对地下水的补给，春季集水区污水的增加以及碳酸盐岩溶解度的降低。研究结果对预测晋ci泉水流域地下水位和盐度，保证饮用水安全具有重要意义。