以引江济汉渠道工程进口段泵站深基坑为例，通过一系列的降水试验，结合初步设计阶段的试验成果，综合分析了基坑含水层渗透系数。降水试验成果分析中既采用了抽水试验规程推荐的计算公式，也采用数学模型对降水试验进行模拟，最终提出了不同含水层渗透系数，为后期基坑降水方案研究提供基础资料，设计单位依据降水试验结果对基坑降水方案作出了重大设计变更。

The coefficients of permeability of the aquifers around the deep foundation pit were comprehensively analyzed through dewatering tests based on the test results in the preliminary design stage. The deep foundation pit of the pumping station,which is in the entrance region of the canal project of water diversion from the Changjiang River to the Hanjiang River, was taken as an example. By analyses of the dewatering test results through both the formulas recommended by the specification of pumping test and the numerical simulation, the permeability coefficients of different aquifers were obtained. These coefficients provided basic data for the planning of foundation pit dewatering in the later stage. The dewatering plan was improved remarkably by the designers according to the dewatering test results.