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Transmissivity Estimates by Specific Capacity Data of Some Fractured Italian Carbonate Aquifers
Water ( IF 3.0 ) Pub Date : 2021-05-14 , DOI: 10.3390/w13101374
Daniela Valigi , Costanza Cambi , Roberto Checcucci , Lucio Di Matteo

Transmissivity estimates can be obtained by different approaches, mainly analytical and empirical. The application of analytical methods requires checking non-linear well losses due to turbulence and vertical flow related to partial penetration. The empirical approach relates transmissivity values to specific capacity data measured in the same well. The interpretation of available pumping tests highlights porous media solutions' applicability in most of the step-drawdown curves analyzed. Double or triple porosity approaches are more appropriate only for wells located close to fault systems. In this work, a new relationship to estimate transmissivity by specific capacity data in some Italian carbonate aquifers is proposed. The comparison with other relationships available in the literature for similar aquifers worldwide confirms the validity of a general equation for carbonate aquifers, helping the spatial characterization of aquifer transmissivity in scarce data regions. Nonetheless, the use of equations of the same kind with different coefficients allows good results on our set of data. Results can improve the knowledge of fractured–karst aquifers by also including data from Central Italy.

中文翻译:

通过某些破裂的意大利碳酸盐含水层的比容数据估算透射率

可以通过不同的方法(主要是分析方法和经验方法)获得透射率估计值。分析方法的应用需要检查由于湍流和与部分渗透有关的垂直流造成的非线性井损。经验方法将透射率值与在同一口井中测得的比容数据相关联。对可用抽水测试的解释突出了多孔介质解决方案在所分析的大多数降压曲线中的适用性。双重或三次孔隙率方法仅适用于靠近断层系统的井。在这项工作中,提出了一种通过比容数据估算意大利某些碳酸盐含水层中的透射率的新关系。与世界范围内类似含水层的文献中其他可用关系的比较,证实了碳酸盐含水层通用方程的有效性,有助于在稀缺数据区域中对含水层透过率进行空间表征。尽管如此,使用具有不同系数的相同种类的方程仍可以对我们的数据集产生良好的结果。结果还包括来自意大利中部的数据,可以提高对破裂岩溶含水层的了解。
更新日期:2021-05-14
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