万家寨水库蓄水后天桥泉域岩溶水资源量变化分析

Analysis on Variation of Karst Water Resources in Tianqiao Spring Region after water storing in Wanjiazhai Reservoir

天桥泉域在万家寨水库蓄水之后自然条件改变,使泉域边界和范围发生了变化。在深入调查分析天桥泉域岩溶水资源现状的基础上,对泉域边界和范围重新进行圈定,并根据流域和水文地质条件的差异性对泉域进行了分区。采用区内典型雨量站多年长系列观测资料对泉域内天然补给资源进行分析计算,利用泉域内钻孔资料、抽水试验资料对泉域内储存资源量进行分析计算,计算了降水频率为75%的开采资源量。可为泉域内岩溶地下水的开发利用提供参考。

The natural condition of its boundary and range in Tianqiao spring region have been changed after storage of water in the Wanjiazhai Reservoir. Based on the deep investigation and analysis of karst groundwater resources, we modified the current boundary and range, and according to the difference between the river basin and hydrologic geology condition, zoning was completed. Furthermore, we calculated the resource exploitation quantity with 75% precipitation frequency, which resulted from the former data of drilling and pumping experiment as well as long term observation data. It should be useful for exploitation and utilization of karst groundwater in the spring region.