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含水层的导水系数和储水系数,通常是通过分析稳定或非稳定抽水试验资料而确定的。事实上,非稳定抽水试验的传统分析方法多半是图解法,因此,受到曲线配合及内插、解释图表各种判断误差的影响。这里介绍一种方法,不需作图和使用图表。导水系数和储水系数是用非稳定试验的实测时间降深资料进行回归分析算得的。这个计算在手提式计算器上就可容易进行。计算步骤用四个例子加以说明,并将计算结果与图解法得到的进行对比。可以证明,这种方法对于不漏水承压含水层的标准泰斯(Theis)曲线解或雅各布(Jacob)直线解都是一种可供选择的方法。然而,回归法用在漏水承压含水层和潜水层就可能出现问题。
The aquifer’s water conductivity and water storage coefficient are usually determined by analyzing stable or unstable pumping data. In fact, most of the traditional analysis methods for unsteady pumping tests are graphic methods. Therefore, they are affected by curve matching and interpolation and interpretation of various judgment errors of graphs. Here’s a way to do it without drawing and using charts. The water transfer coefficient and water storage coefficient are calculated by regression analysis of the measured data of non-steady test. This calculation can be easily done on a handheld calculator. The calculation procedure is illustrated by four examples, and the calculation results are compared with those obtained by the graphic method. It can be shown that this method is an alternative to the standard Theis curve solution or the Jacob linear solution for a water-tight aquifer. Regression, however, can be problematic for use in leaking confined aquifers and submersibles.