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鲁西平原地区赋存较丰富的岩溶地下水,埋深一般在80~200m,其中济宁市北部的岩溶水已被当地政府纳入综合开发利用规划。但该岩溶水系统的补给机理一直是水文地质工作者们关心的问题,这为准确评价该地区岩溶地下水水资源量增加了一定的难度。传统观点认为,济宁北深层岩溶水的主要补给来源是南部裸露山区的降水入渗补给,但笔者经计算,发现南部裸露区降水入渗补给量远远不能满足现状开采量,这说明该岩溶地下水系统还有其它补给途径。该文通过对地下水位动态、水化学特征、水中铀同位素组成特征及抽水试验资料的分析,认为上覆孔隙水的越流补给才是该岩溶水系统最主要的补给来源。
Lushu plain area rich in karst groundwater, buried depth is generally 80 ~ 200m, of which the karst water in northern Jining City has been integrated into the local government integrated development and utilization planning. However, the recharge mechanism of karst water system has always been a concern for hydrogeologists, which adds some difficulty to accurately assess the amount of karst groundwater in this area. According to the traditional view, the main source of recharge for deep karst water in the north of Jining is the supply of rainfall infiltration to the exposed southern mountainous areas. However, after calculation, the authors find that the rainfall infiltration recharge in the bare areas in the southern part of the country can not meet the current exploitation quantity, indicating that the karst groundwater There are other ways to replenish the system. Based on the analysis of groundwater level dynamics, hydrochemical characteristics, isotopic compositions of uranium in water and pumping test data, it is considered that over-flow of overlying pore water is the main source of recharge for this karst water system.