求解黄土含水层水文地质参数的流量-时间配线法

利用基于割离井法的流量-时间配线法反求抽水过程黄土含水层水文地质参数,并与裘布依公式法、割离井公式法的求解结果进行对比。计算结果表明,黄土含水层水文地质参数的求解选用流量-时间配线法求解精度高,可以减少繁琐的计算,结果是可靠的。根据稳定流井流理论,抽水过程观测孔的水位降深值S和观测孔到主井的距离的对数lgr存在一定的关系。利用Dpp软件包的图像处理功能,对实测点据在平面内进行拟合,确定了抽水井影响半径为172 m,确定了抽水过程Q-S、q-S关系曲线方程。

Discharge-time curve fitting method for calculating hydrogeological parameters in loess aquifer

The discharge-time curve fitting method based on the isolated well method was used to calculate the hydrogeological parameters in the process of pumping. Compared with the Dupuit Equation and isolated well method, the results of the new method are more accurate and reliable, and its solution process is simpler. According to steady well flow theories, the water table decline at the observation well, S, has a certain relationship with the logarithm of the distance between the observation well and the main well, lgr, in the pumping process. By plane fitting of the measured data using an image processing function of the software Dpp, it is found that the influence radius of the pumping well is 172 m. The Q-S and q-S curves in the pumping process are also presented.