基于抽水试验的水文地质参数计算方法对比与探讨

Comparison Study of Computational Method of Hydrogeological Parameter Based on Pumping Test

以三门湖抽水试验为例,对几种工作中常用抽水试验求参方法进行了初步比较与探讨。野外水文地质抽水试验参数求取方法主要有基于稳定井流理论的裘布依模型和基于非稳定流理论的泰斯模型,传统的裘布依井流公式计算方法简单,但需对含水层结构进行高度概化,水文地质参数计算结果与实际情况偏差较大;非稳定流计算方法数学模型更严密,求参准确性相对较高,但计算过程较为复杂,对试验数据精度要求较高。

This paper based on Sanmen lake＇s pumping test and preliminary studying the mainly method for calculating the hydrogeololgy parameter that conmonly used in work. The method for calculating the hydrogeololgy parameter of the field hydrogeology pumping test mainly based on the stable well flow theory of Dupuit and the unsteady flow theory of Theis. The traditional dupuit formula well flow calculation method is simple, but the aquifer structure should be highly generalized. Hydrogeological parameter calculation results is different from practical situation. The calculation method of unsteady flow＇s mathematical model is more closely, it is reliable but more complex in counting process, and having high accuracy require on the test data.