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| DOI：10.13522/j.cnki.ggps.2019218 |
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| Hydrochemical Characteristics and Their Influencing Factors of Groundwater in Hulunbuir Coal-electricity Base |
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LIU Ji，GAO Min，WANG Qiangmin，YANG Jian，ZHAO Chunhu
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1. China Coal Research Institute, Beijing 100013, China； 2. Xi’an Research Institute of China Coal Technology & Engineering Group Corp， Xi’an 710054, China; 3. Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology in Shaanxi Province，Xi’an 710077, China; 4. Zhongsheng Environmental Technology Development Co, Ltd., Xi’an 710065, China
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| Abstract: |
| 【Objective】The purpose of this paper is to understand the water quality of Hulunbuir coal - electricity base. 【Method】 81 groundwater samples (of which 42 samples were phreatic water and 39 samples were confined water) were collected for water quality testing. Based on this, descriptive statistics analysis, total dissolved solids (TDS) distribution and hydrochemical type analysis were carried out to study groundwater chemical characteristics in the study area. The analysis of the influencing factors were conducted through the analysis of ion exchange, rock dissolution and evaporation concentration. Finally, the water quality of the groundwater was assessed. 【Result】The result showed that the phreatic water and confined water in the study area belonged to alkaline water with average hardness of 254.81 mg/L and 208.22 mg/L, respectively, cations were mainly Na+ and Ca2+, anion mainly HCO-3 and Cl-, TDS gradually decreased from high plain to plains and valleys and more than 1 000 mg/L of the area was basically located in the high plain. The hydrochemical types of phreatic water were mainly Ca?Na -HCO3 and Ca?Na?Mg-HCO3, and the hydrochemical types of confined water mainly Na-HCO3?Cl and Na?Ca?Mg-HCO3. 【Conclusion】Na+ in groundwater was obtained through the exchange of Na+ in aqueous media with Ca2+ and Mg2+ in groundwater, and the chemical characteristics of the water were mainly affected by the leaching action of sodium and calcium salts. The phreatic water and confined water had generally poor water quality and good only in the valley area. The related research results were intended to provide some reference value for the planning and optimization of water resources in Hulunbuir coal-electricity base. |
| Key words: coal-electricity base; water resources; hydrochemical characteristics; influencing factors; water quality assessment |
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