岩溶地下水富集的地貌组合形态

岩溶地貌组合形态是地质背景条件、地壳隆升、断裂和褶皱等构造运动及溶蚀、侵蚀作用等内外动力地质作用的综合表象。特定的岩溶地貌组合形态，能够反映地下岩溶发育的过程和特征，表现地下水的运动及赋存状态，因而可作为寻找和圈定地下水富集区段的标志。文章通过总结区域水文地质调查实践的成果及经验，列出了8种能够有效反映地下水富集区段的岩溶地貌组合形态，分别是:岩溶山间平坝区、谷地及洼地古地表干流遗迹线、沟口洼地孤峰下、溶蚀沟谷交汇处、岩溶陡崖下、岩溶谷中湾对湾段、缓坡及浅洼地边缘、垄岗台地丘陵区。并逐一描述各个地貌形态特征，通过典型实例剖析，分析了它们的赋水机制。实践证明这些地貌组合形态可作为寻找地下水富集区段的标志。 

Patterns of karst geomorphologic combinations in areas with rich groundwater

Only in rock masses with strong karstification and active karst development, it is possible to form areas with rich karst groundwater or zones with concentrated flows. Karst landform with particular surficial appearance is the result of geological activities controlled by many geological factors such as geological conditions, endogenic and exogenic geological dynamic processes, and neotectonic movements as well. The karst geomorphologic patterns, with the combination of various geomorphologic units, are usually the ground manifestations of underground features and processes such as the formation and evolution of underground karsts and associated groundwater flow and storage. These geomorphologic patterns can accordingly be used as important indicators for identifying the areas that enrich in groundwater resources. In this article, eight karst geomorphologic patterns are presented through the analysis of the information of regional hydrogeological survey and relevant database. For groundwater prospecting and borehole siting purpose, these geomorphologic combination forms that reflect areas of good aquifers are of great value and can provide a great amount of effective information in the hydrogeological survey and drilling. These eight karst geomorphologic combination forms include the sedimentary plain in the karst fault basin or valley, the paleo channel in karst valley and lower land, the isolated karst hill at the valley mouth, the junction of karst valleys, the long belt under the karst fault escarpment, the area of the opposite concave bank in karst valley, the zone with gentle slope and shallow depression, and the karst shallow hill and roomy ridge. In the article, the morphological characters of each karst geomorphologic patterns are also described in detail. Via typical case study, the formation mechanisms of groundwater dynamics in these areas are further analyzed.