忻州盆地边山岩溶水系统与盆地孔隙水补给分析

忻州盆地边山岩溶水与盆地孔隙水存在密切的水力联系,岩溶水系统的圈划与分析对盆地孔隙水资源评价十分重要。文章运用地下水系统分析理论,基于地理信息系统技术,定量提取区域地质(岩相古地理、地层与构造)和水文地质信息,绘制了基于区域隔水底板等高线图、典型剖面图、盆地-山区两壁投影图等信息的岩溶水系统图;运用岩溶水系统图分析得出下马圈泉岩溶水系统与盆地孔隙水存在间接汇水、潜流和河流(泉)渗漏等补给关系,并给出了补给量的计算方法,为忻州盆地地下水资源评价与定量模拟提供了新的水文地质依据与基础。

Mapping of karst water system around mountainous area and recharge to porous water in the Xinzhou Basin

Close hydraulic connection exists between the karst water system in mountainous area and groundwater in the porous media of Xinzhou Basin.The regionalization and analysis of karst water system is important for evaluation of groundwater resources of the basin.On the basis of groundwater system theory and geographic information system(GIS)technique,some regional geologic and hydrogeologic information was extracted from the lithofacies paleogeography,geology,tectonics and stratum in the study area.Through mapping the isolines of the base of regional karst water aquifers,typical hydrogeologic cross-sections,and the projective section of the both planes of a fault,we plotted the map of karst water system.According to the map of karst water system and analysis of multi-factors on recharge,different recharge relationships can be obtained,such as indirect converge,underground flow and river(spring) leakage.Furthermore,the recharge effects caused by karst water of Xiamajuan Spring can be illustrated.The research results provided new hydrogeologic evidence and basis for evaluation and numerical modeling of groundwater resources in Xinzhou Basin.