| 宁夏南部“南北古脊梁”岩溶裂隙水流系统分析 |
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| 引用本文：李向全,张发旺,毕二平,韩占涛.2004.宁夏南部“南北古脊梁”岩溶裂隙水流系统分析[J].地球学报,25(5):571-574. |
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| 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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| 中文摘要:运用构造控水分析、水化学同位素等方法，对宁南“南北古脊梁”岩溶裂隙水系统进行了深入的分析与讨论。该区储水空间以岩溶裂隙为主，岩溶水的空间分布明显受SN向大型断裂构造控制。岩溶地下水以大气降水起源为主，并表现为多元水混合而成。水质分布呈现南优北劣的分带特征，北部水一岩相互作用形式为溶滤一蒸发浓缩型，呈高矿化咸水，南部为溶滤一混合型，呈低矿化淡水。根据水动力场和水化学场特征，划分了3个相对独立的岩溶水子系统。 |
| 中文关键词:西北 干旱区 深层岩溶 地下水 |
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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 |
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| Abstract: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. |
| keywords:western China arid regions deep karst groundwater |
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