摘要
抽水试验是获取水文地质参数,查明地下水运动条件重要的一种手段。以长江南京段上游典型含水层抽水试验为例,对观测井数据进行分析,采用传统的稳定流公式法、非稳定流的s-lgt量板法、沃尔顿法、水位恢复法等,并对降深进行井损修正以及含水层有效厚度修正,采用修正后的数据计算水文地质参数。结果表明:所求得的水文地质参数,以非稳定流参数为佳,典型含水层的渗透系数在40m/d左右,符合长江洲滩及滨岸冲积层的渗补条件。
Pumping test is an important means to obtain the hydrogeological parameters and find out the groundwater movement conditions. Taking the typical aquifer pumping test of the Upper Yangtze River in Nanjing for an example, the data of observation wells are analyzed.The traditional formula method of steady flow, s-lgttemplate method and Walton method and water level recovery method of unsteady flow are adopted to calculate hydrogeological parameters, which counted by well loss correction and thickness correction.The results show that the unstable flow parameters are better in the obtained hydrogeological parameters, and the permeability coefficient of the typical aquifer is about 40 m/d, which meets the seepage compensation conditions of the Yangtze River beach and coastal alluvium.
作者
杨俊松
汪名鹏
YANG Jun-song;WANG Ming-peng(Jiangsu Institute of Hydrogeology and Marine Geology Exploration,Huaian 223005,Jiangsu,China;Jiangsu Hydrogeological Engineering Geological Survey Institute,Huaian 223005,Jiangsu,China)
出处
《地下水》
2022年第3期125-127,171,共4页
Ground water
关键词
水文地质参数
抽水试验
渗透系数
非稳定流
长江南京段
Hydrogeological parameters
pumping test
permeability coefficient
unsteady flow
Yangtze River in Nanjing
