Parameter resolution of simulated responses to periodic hydraulic tomography signals in aquifers

IF 4 2区环境科学与生态学 Q1 WATER RESOURCES

Advances in Water Resources Pub Date : 2024-05-31 DOI:10.1016/j.advwatres.2024.104734

Daniel Paradis , René Lefebvre , Aymen Nefzi

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Abstract

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 l-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.

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含水层中周期性水力断层扫描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，以表示地下水的流动和溶质迁移。本研究调查了在井间进行的周期性水力层析成像，以获得准确的水力特性图像。利用数值流动模型模拟了不同周期和振幅的正弦试验流、水力特性和水井配置的层析成像实验。对获得的水头和敏感性进行 l 曲线分析，确定了最佳参数分辨率，并以此为基础对实验进行了比较。结果表明，短周期信号的瞬态阶段提供的含水层分辨率信息最多。如果在分析中适当结合不同周期的测试，分辨率还能进一步提高。研究得出的结论是，周期性层析成像可提供有关水力传导性空间分辨率及其垂直各向异性和比储量的宝贵信息，但信号特征的选择至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Water Resources 环境科学-水资源

CiteScore

9.40

自引率

6.40%

发文量

171

审稿时长

36 days

期刊介绍： Advances in Water Resources provides a forum for the presentation of fundamental scientific advances in the understanding of water resources systems. The scope of Advances in Water Resources includes any combination of theoretical, computational, and experimental approaches used to advance fundamental understanding of surface or subsurface water resources systems or the interaction of these systems with the atmosphere, geosphere, biosphere, and human societies. Manuscripts involving case studies that do not attempt to reach broader conclusions, research on engineering design, applied hydraulics, or water quality and treatment, as well as applications of existing knowledge that do not advance fundamental understanding of hydrological processes, are not appropriate for Advances in Water Resources. Examples of appropriate topical areas that will be considered include the following: • Surface and subsurface hydrology • Hydrometeorology • Environmental fluid dynamics • Ecohydrology and ecohydrodynamics • Multiphase transport phenomena in porous media • Fluid flow and species transport and reaction processes