柳林泉域滞流区岩溶水的热源及其Na+、Cl-来源探讨

贾振兴; 臧红飞; 郑秀清

doi:10.11932/karst20150605

柳林泉域滞流区岩溶水的热源及其Na+、Cl-来源探讨

doi: 10.11932/karst20150605

1.
太原理工大学水利科学与工程学院/山西省水资源研究所
2.
太原理工大学水利科学与工程学院

基金项目: 国家自然科学基金项目（41572239）

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出版历程
- 发布日期: 2015-12-25

The origin of Na+, Cl- and thermal source of karst groundwater in the stagnant area of Liulin spring basin

1.
College of Water Resources Science and Engineering, Taiyuan University of Technology/Institute of Water Resources in Shanxi Province
2.
College of Water Resources Science and Engineering, Taiyuan University of Technology

摘要

摘要: 柳林泉域滞流区岩溶水以高温、高Na+和Cl-浓度为主要特征。文章在区域地质及水文地质条件分析基础上，采用化学计量学原理，判断了该区岩溶水的热源及Na+和Cl-的来源。结果显示：在泉域的补给区、径流区和排泄区的上青龙、龙门会、杨家港和寨东泉组，岩溶水中的Na+和Cl-主要来源于岩盐的溶解，其中多余的Na+可能来自于阳离子交换、黄土中含Na+矿物的溶解及城市污水的排放；滞流区和排泄区的刘家疙瘩泉组岩溶水中高浓度的Na+和Cl-也主要来自于岩盐的溶解，而多余的Cl-可能由岩溶水中的Na+交换吸附介质中的Ca2+或Mg2+所致。西部滞流区岩溶水的热源主要包括地温梯度增热、当地正常地温、岩石中放射性元素产热和石膏的溶解放热，其贡献率分别为45%、28%、20%和7%。
- 岩溶热水 /
- 化学计量学 /
- 滞流区 /
- Na+、Cl-来源 /
- 柳林泉域
Abstract: Karst groundwater constitutes the major water supply source for industry, agriculture and urban domestic water use for six counties in the Liulin spring basin. The value of the water supply is influenced by high temperature and high concentrations of sodium (as Na+) and chlorine (as Cl-) of karst groundwater in the stagnant area. Thus, the research on the origin of Na+ and Cl- and thermal source is of significance for the understanding of the karst groundwater system, reasonable exploitation and conservation of the water resource. Based on analyses of regional geographic and geomorphic, geologic and hydrogeologic conditions, the spatial distribution and origins of Na+, Cl- and temperature of the karst groundwater are explored using methods of Kriging interpolation, chemical thermodynamics and stoichiometry. The results show that:（1）The temperature and concentrations of Na+ and Cl- of the karst groundwater in the stagnant area increase in the flow direction with a significant gradient of 0.95 ℃/km、140 mg/km and 190 mg/km，respectively, which is higher than those in the recharge, flow-through and discharge areas. （2）In groundwater recharge and flow-through and the discharge area represented by Shangqinglong, Longmenhui, Yangjiagang and Zhaidong spring groups, Na+ and Cl- is mainly from the dissolution of halite. Furthermore, the concentration of Na+ is higher than Cl-, which is perhaps attributed to the processes of ion exchange, dissolution of Na-bearing minerals in loess and contribution from the discharge of urban domestic sewage. （3）In the Liujiageda spring area and the stagnant area, the high concentrations of Na+ and Cl- mainly derive from the dissolution of halite. And the cause of concentration of Cl- higher than Na+ could be the ion exchange between Na+ and Ca2+or Mg2+ because of higher concentration of Na+.（4）The heat sources of the karst groundwater in stagnant area consist of local geothermal gradient, local normal ground temperature, radiogenic heat of rocks and exothermic process via gypsum dissolution; and the contribution of these sources are 45%, 28%, 20% and 7%, respectively.
- thermal karst groundwater /
- stoichiometry /
- the stagnant area /
- origin of Na+ and Cl- /
- Liulin spring basin

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