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山东省济宁市北部地区分布较大面积寒武-奥陶纪碳酸盐岩地层,裂隙岩溶地下水较丰富,目前已被当地纳入开发利用规划。该地区裂隙岩溶含水层埋深60~200m,地下水的补给机理极其复杂。但为了准确评价地下水资源,为地下水的开发利用提供技术依据,必须查明地下水的补给来源。该文根据不同环境下、不同水体中铀同位素分布特征不同的特点,得出该地区岩溶地下水主要补给来源于上覆孔隙水越流与裸露区大气降水入渗的结论,为解决济宁北岩溶地下水补给来源问题提供了新的证据。
The northern part of Jining City, Shandong Province, has a large area of Cambrian-Ordovician carbonate rock formation. Rift karst groundwater is abundant. It has been incorporated into the development and utilization planning of the present. The fractured karst aquifer in this area is 60 ~ 200m deep, and the recharge mechanism of groundwater is extremely complicated. However, in order to accurately evaluate groundwater resources and provide a technical basis for the development and utilization of groundwater, it is necessary to find out the sources of groundwater recharge. According to the different characteristics of isotope distribution of uranium isotopes in different water bodies, this paper draws the conclusion that the main recharge of karst groundwater in this area comes from over-flow of overlying pore water and infiltration of atmospheric precipitation in exposed area. In order to solve the problem of groundwater recharge The source question provided new evidence.