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过去,我们在潜水层做非稳定抽水试验,利用其降深～时间或降深～距离的关系求水文地质参数时,一般仍沿用承压水的泰斯(Theis)公式(1935),计算结果常常不很理想,特别是给水度,不是偏小便是偏大,不能满足生产上的精度要求。因此很多单位,都把潜水层参数的测定作为科研专题。国外对这个问题的研究,自博尔顿(Boulton,1954年)发表了第一个潜水非稳定流公式以来,已有20多年历史,文献颇多,这里仅就生产实践中已碰到的主要问题,选择那些比较成熟而简便可用的成果,摘编如下,供生产中参考。
In the past, when we made a non-steady pumping test in the dive layer and used its relationship between depth reduction, time or depth, and distance to obtain hydrogeological parameters, the Theis formula (1935) was still generally used in confined water. It is often not ideal, especially if the water supply is not oversized, it is too large to meet the precision requirements in production. Therefore, in many units, the determination of the parameters of the groundwater layer is used as a scientific research topic. The study of this issue abroad has been more than 20 years since the publication of the first formula for unsteady flow of diving from Boulton (1954). There are many documents, and here are the main problems that have been encountered in production practice. Select those that are more mature and easy to use, excerpted below for reference in production.