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Open AccessArticle

Analysis of the Erosion Law of Karst Groundwater Using Hydrogeochemical Theory in Liulin Spring Area, North China

1
College of Water Resources Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2
North China Municipal Engineering Design & Research Institute Corporation Limited, Tianjin 300110, China
3
Taiyuan Design Research Institute for Coal Industry, Taiyuan 030001, China
4
Shanxi Hydrology and Water Resources Survey Bureau, Taiyuan 030001, China
*
Author to whom correspondence should be addressed.
Water 2018, 10(6), 674; https://doi.org/10.3390/w10060674
Received: 7 April 2018 / Revised: 13 May 2018 / Accepted: 18 May 2018 / Published: 24 May 2018
(This article belongs to the Section Hydrology)
The comprehensive geological, hydrogeological and hydrogeochemical model of the Liulin karstic spring area in the eastern limb of the Ordos syncline was established by a combination of chemical thermodynamics, chemical kinetics and hydrogeology. The study area was divided into four zones based on the saturation indices of calcite, dolomite and gypsum, which were computed by the groundwater-chemical simulation software PHREEQC (a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations), with consideration of the geological and hydrogeological conditions and hydro-geochemical reactions. The weight and volume modulus of carbonate rocks and sulphate rocks in each zone were calculated by the method of correlation analysis to evaluate the dissolution law of karst groundwater. The results showed that in the zone I (saturation index of calcite βc ≤ 1) the dissolution of calcite was the major geochemical reaction, the weight modulus of calcite was higher than that of dolomite and gypsum, and the pore space generated by the dissolution of calcite was one order of magnitude larger than that of dolomite and gypsum. In zone II (saturation index of calcite βc > 1 to saturation index of dolomite βd ≤ 1) the corrosion moduli were all smaller than that in zone I, the solubility of dolomite and gypsum increased, and calcite reached saturation. The space occupied by the calcite sediment was less than that dissolved by dolomite and gypsum. In zone III (saturation index of dolomite βd > 1 to saturation index of gypsum βg ≤ 1), calcite and dolomite had reached saturation, accompanied by dedolomitization, and the amount of gypsum dissolution increased obviously. The conclusions indicate that the hydrogeochemical environment plays an important role in mineral dissolution. View Full-Text
Keywords: hydrogeochemical process; hydrogeology; karst groundwater; corrosion modulus; Liulin spring area hydrogeochemical process; hydrogeology; karst groundwater; corrosion modulus; Liulin spring area
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Zheng, X.; Wang, K.; Zhang, F.; Chen, J.; Li, A.; Chen, Y. Analysis of the Erosion Law of Karst Groundwater Using Hydrogeochemical Theory in Liulin Spring Area, North China. Water 2018, 10, 674.

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