Abstract Hydraulic conductivity profiles (HCPs) are of crucial importance for 3-dimensional flow and transport groundwater models. Easy and inexpensive methods for the estimation of such profiles increase their availability and strengthen the efficiency of the models. In this study a method is presented, which combines the electrical resistivity (ER) measured over the depth of the aquifer in a borehole and the response of the aquifer to the short duration pumping from the borehole. The hydraulic conductivity profile is calculated from the Kozeny-Carman equation, in which the profiles of the porosity and the mean grain size (MGS) are required. Porosity is calculated from Archie’s law using the intrinsic formation factor, which results from the ER. MGS is calculated from the porosity using a relationship between them. The initial form of this relationship is obtained from literature data and is then adjusted to the conditions of each particular case. The adjustment is achieved by calibrating a MODFLOW based groundwater model, so that it sufficiently simulates the temporal variation of the water level measured in the borehole during the short pumping. The method is applied to the estimation of the HCP in an unconsolidated alluvial aquifer in Greece. The sensitivity of the results to the parameters and assumptions used in the method is investigated and discussed.

中文翻译：

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使用电阻率测井和短期抽水测试来估计水力传导率曲线

摘要 水力传导率剖面 (HCP) 对于 3 维流动和输送地下水模型至关重要。用于估计此类剖面的简单且廉价的方法增加了它们的可用性并增强了模型的效率。在这项研究中，提出了一种方法，该方法结合了在钻孔中的含水层深度范围内测量的电阻率 (ER) 和含水层对从钻孔中抽水的短时间的响应。水力传导率分布是根据 Kozeny-Carman 方程计算的，其中需要孔隙度和平均粒度 (MGS) 的分布。孔隙度是使用由 ER 产生的内在形成因子根据阿奇定律计算的。MGS 是使用它们之间的关系从孔隙度计算出来的。这种关系的初始形式是从文献数据中获得的，然后根据每个特定案例的条件进行调整。调整是通过校准基于 MODFLOW 的地下水模型来实现的，因此它充分模拟了在短时间抽水期间在钻孔中测量的水位的时间变化。该方法用于估算希腊松散冲积含水层中的 HCP。研究和讨论了结果对方法中使用的参数和假设的敏感性。该方法用于估算希腊松散冲积含水层中的 HCP。研究和讨论了结果对方法中使用的参数和假设的敏感性。该方法用于估算希腊松散冲积含水层中的 HCP。研究和讨论了结果对方法中使用的参数和假设的敏感性。