后寨河流域岩溶含水介质结构与地下径流研究

A STUDY ON THE STRUCTURE OF KARST AQUIFER MEDIUM AND THE GROUNDWATER FLOW IN HOUZHAI UNDERGROUND RIVER BASIN

通过脉冲试验 ,采用测站脉冲响应曲线及流量衰减曲线分析 ,对后寨河流域含水介质结构进行了研究。研究结果表明 ,后寨河流域主要发育有溶隙 -溶管网络、较单一溶管以及溶隙网络三种含水介质结构 ,而且以溶隙、溶孔为主 ,其占含水介质体积的比率可达 83.1%～ 96 .9% ,而岩溶管道含水介质则只有 3.1%～16 .8%。不同含水介质的水文地质特征差异很大 ,溶隙 -管道网络水位上升快而衰减慢 ,水位变幅小 ;较单一溶管水位上升快而衰减亦快 ,水位变幅较大 ;

Based on pulse test, the pulse response curve and flow recession curve are analysed for studying the structure of karst aquifer medium. It is proved that there are three types of aquifer medium, i.e. karst fissure and conduit net, unitary karst conduit and karst fissure net. Among the three kinds of medium, the karst fissure and pore take the predominant place, which may make up 83.1% to 96.9% of the total aquifer medium volume. But karst tube only makes up 3.1% to 16.8% of the total volume. Hydrogeological features differentiate greatly in different types of aquifer mediums. Water level in karst fissure and conduit net medium rises fast but falls slow, so the fluctuation of the water table is quite gentle. Water level in the unitary karst conduit not only rises fast but also falls fast, correspondingly, the fluctuation of the water table is quite violent. And the fluctuation of the water table in karst fissure net medium is between the above mentioned two media types.