| 宁夏南部“南北古脊梁”岩溶裂隙水流系统分析 |
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| 关键词:western China arid regions deep karst groundwater |
| 基金项目:国土资源部地质调查项目"宁南水资源综合评价与合理开发利用"(编号:DKD2002005) |
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| The Deep Karst Groundwater System in Arid Regions of Northwestern China: A Case Study of Karst Fissure Groundwater in Southern Ningxia |
| Karst fissure groundwater in southeastern Ningxia has been synthetically analyzed by applying the theories of tectonic-controlled groundwater and groundwater geochemistry as well as isotope techniques. The results show that karstis not well developed in the area, the groundwater storage space is mainly madeup of karst fissures, and the distribution of karst groundwater is strictly controlled by the NS-trending faults. Karst groundwater in this region mainly originates from atmospheric precipitation and is mixed with various sorts of primitivewater. Groundwater quality shows zonal characteristics, i.e., good in the southand bad in the north. The water-rock interaction is characterized by dissolution-evapotranspiration and produces salt water in the northern area. In the southern area the water-rock interaction has features of dissolution-mixture and produces fresh water. According to characteristics of hydro-dynamic conditions and water chemistry, the whole karst system has been divided into three subordinate karst groundwater systems. The results have an important scientific significance in the study of the difference between the karst groundwater in western China andthat in eastern China. |
| LI Xiang-quan,ZHANG Fa-wang,BI Er-ping,HAN Zhan-tao.2004.The Deep Karst Groundwater System in Arid Regions of Northwestern China: A Case Study of Karst Fissure Groundwater in Southern Ningxia[J].Acta Geoscientica Sinica,25(5):571-574. |
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