An accurate assessment of the hydraulic properties of aquifers is required to represent groundwater flow and solute transport. This study investigates periodic hydraulic tomography performed between wells to obtain accurate images of hydraulic properties. Tomographic experiments with different period and amplitude of sinusoidal test flow, hydraulic properties and well configurations were simulated with a numerical flow model. An -curve analysis of the obtained heads and sensitivities identified the optimal parameter resolution and served as a basis for comparing the experiments. The results show that the transient phase of signals with short periods provides the most information about the resolution of the aquifer. The resolution could be further improved if tests with different periods were properly combined in the analysis. The study concludes that periodic tomography provides valuable insight into the spatial resolution of hydraulic conductivity and its vertical anisotropy and specific storage, but the choice of signal characteristics is critical.

中文翻译：

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含水层周期性水力层析成像信号模拟响应的参数分辨率


需要对含水层的水力特性进行准确评估，以表示地下水流量和溶质迁移。本研究研究了在井间进行的定期水力层析成像，以获得水力特性的准确图像。利用数值流动模型模拟了不同周期和幅度的正弦测试流、水力特性和井配置的层析实验。对获得的扬程和灵敏度进行曲线分析，确定了最佳参数分辨率，并作为比较实验的基础。结果表明，短周期信号的瞬态相位提供了有关含水层分辨率的最多信息。如果在分析中适当地结合不同时期的测试，分辨率可以进一步提高。研究得出的结论是，周期性层析成像为水力传导率的空间分辨率及其垂直各向异性和特定存储提供了有价值的见解，但信号特征的选择至关重要。