基于不同孔径钻孔抽水试验求参对比分析

Comparison and Analysis of Parameters Calculation Method through Pumping Tests Based on the Different Bore Diameters

抽水试验是确定含水层水文地质参数,了解水文地质条件的主要方法。水文地质参数计算的精度直接关系到地下水资源评价精度和对区域水文地质条件的认识程度。基于野外抽水试验数据,通过裘布依稳定井流公式法和含水层试验软件Aquifer test计算水文地质参数,将计算结果作比较,以期得到更加精确的水文地质参数。虽然裘布依稳定井流法计算简便,但对水文地质条件概化处理,使得参数计算结果与实际值相差较大;而Aquifer test软件基于严谨的非稳定流理论数学模型,求参准确性相对较高,操作方法简捷。

Pumping test is the main method to determine hydrogeological parameters of aquifers and to understand hydrogeological conditions.The accuracy of hydrogeological parameters calculation is directly related to the evaluation accuracy of groundwater resources and the understanding of regional hydrogeological conditions.Through field pumping test data based on Dupuit stable well flow formula and aquifer test software Aquifer test to calculate the hydrogeological parameters,the calculation results are compared,in order to get more accurate hydrogeological parameters.Although the calculation method of the steady well flow is simple and convenient,the hydrogeological condition is generalized,so that the calculation results of the parameters are different from the actual values.The Aquifer test software is based on the rigorous mathematical model of unsteady flow theory.The accuracy of the parameter is relatively high and the method of operation is simple and direct.