利用单井水位恢复曲线求解含水层水文地质参数

Solving Hydrogeological Parameters of Aquifer by Using Single Well Water Level Recovery Curve

利用Theis水位恢复法求取水文地质参数,首先依据含水层渗透性、富水性以及边界条件的影响,将水位恢复曲线进行了划分,并给出了水位恢复曲线实例。在此基础上,以五沟矿含水层单孔抽水恢复曲线为例,运用AquiferTest软件,依据Theis水位恢复法计算含水层的渗透系数K和贮水系数S,并将计算结果与稳定流求参做比较。结果表明,单井水位恢复曲线受含水层富水性及边界条件的影响较大,只有在满足Theis假设的前提下,使用Theis水位恢复法求取水文地质参数准确度较高。水位恢复法与稳定流理论计算出的渗透系数结果较为接近,差别不大,并可计算出贮水系数S这一重要水文地质参数,扩大了单井抽水数据的利用率。

The Theis water level recovery method is used to obtain hydrogeological parameters.Firstly,the water level recovery curve is divided according to the influence of permeability,water-rich and boundary conditions of aquifer,and an example of water level recovery curve is given.On this basis,taking the single-hole pumping recovery curve of Wugou Mine aquifer as an example,using Aquifer Test software,the permeability coefficient K and water storage coefficient S of aquifer are calculated based on Theis water level recovery method,and the calculation results are compared with those of steady flow.The results show that the water level recovery curve of a single well is greatly affected by aquifer's water-rich and boundary conditions.Only when the Theis hypothesis is satisfied,the accuracy of the Theis water level recovery method for obtaining hydrogeological parameters is relatively high.The permeability coefficient calculated by the water level recovery method is close to that calculated by the steady flow theory,with little difference.The important hydrogeological parameter of water storage coefficient S can be calculated,which expands the utilization rate of single well pumping data.