西南岩溶石山地区地下水资源

Groundwater resources in the karst mountainous area in Southwest Chain

中国西南地区碳酸盐岩大面积连片分布 ,地下水资源总量丰富 ,但分布极不均一 ,存在大片干旱缺水区和石漠化地带。目前开展的可有效利用的地下水资源调查评价将该区划分为隆起带裸露岩溶分布区、沉降带边缘褶皱构造控制岩溶分布区和断陷盆地隐伏岩溶分布区。区内岩溶发育和地下水赋存除受岩性、地质构造的控制外 ,还受新构造运动和古溶蚀的影响。岩溶地下水赋存于地表以下浅部岩溶带、构造控制的中部岩溶带和深部古溶蚀带。特殊岩性和古溶蚀形成的似层状岩溶含水层具有重要的开发价值。

There is a vast area covered continuoursly by carbonite in Southwest China, where it is very rich for groundwater resources and exists large zones lack of water and regions of desert rock because of the uneven distribution of groundwater. In the present survey and valuation the area is divided into three parts: exposed karst region in upwarped distric, karst region controlled by folded structures near depressed belts and blinded karst region in fault basins. Besides lithological characters and geological structures, the karst development and groundwater in the area are affected by neotectonic movement and fossil karst. The karst groundwater stores in the shallow karst zones below the surface, the middle karst zones controlled by geological structures and the deep zones of fossil karst. The lay-like karst aquifer formed by some special strata and fossil karst are very important in the groundwater exploitation in this area.