技术说明:地下水对大气潮汐响应的新解析解

IF 5.7 1区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Jose M. Bastias Espejo, Chris Turnadge, Russell S. Crosbie, Philipp Blum, Gabriel C. Rau
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引用次数: 0

摘要

摘要地下水力和地质力学性质可以通过井水水位对地球和大气潮汐的响应来估计。然而,分析解的有限可用性限制了这种方法在实际现场条件下的适用性。本文提出了一种新的、严格的大气谐波载荷下地下井间流动模型解析解。我们将其整合到一个全面的工作流程中,该工作流程还使用一种完善的地球潮汐方法来估计地下属性。当应用于从玛丽-怀尔德曼河地区(澳大利亚北部地区)的砂含水层中筛选的两个钻孔获得的地下水监测数据集时,估计的水力导电性和特定储水量一致。结果还表明,两个钻孔附近都发生了较小的垂直泄漏。此外,估计的地质力学性质在类似岩性环境下的文献报道值范围内。我们的新解决方案扩展了现有方法的能力,我们的结果表明,分析地下水对自然潮汐力的响应是一种低成本且易于使用的解决方案,适用于松散、水力限制和不排水的地下条件。这种方法可以支持成熟的表征方法,增加地下信息的数量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Technical note: Novel analytical solution for groundwater response to atmospheric tides
Abstract. Subsurface hydraulic and geomechanical properties can be estimated from well water level responses to Earth and atmospheric tides. However, the limited availability of analytical solutions restricts the applicability of this approach to realistic field conditions. We present a new and rigorous analytical solution for modeling flow between a subsurface–well system caused by harmonic atmospheric loading. We integrate this into a comprehensive workflow that also estimates subsurface properties using a well-established Earth tide method. When applied to groundwater monitoring datasets obtained from two boreholes screened in a sand aquifer in the Mary–Wildman river region (Northern Territory, Australia), estimated hydraulic conductivity and specific storage agree. Results also indicate that small vertical leakage occurs in the vicinity of both boreholes. Furthermore, the estimated geomechanical properties were within the values reported in the literature for similar lithological settings. Our new solution extends the capabilities of existing approaches, and our results demonstrate that analyzing the groundwater response to natural tidal forces is a low-cost and readily available solution for unconsolidated, hydraulically confined, and undrained subsurface conditions. This approach can support well-established characterization methods, increasing the amount of subsurface information.
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来源期刊
Hydrology and Earth System Sciences
Hydrology and Earth System Sciences 地学-地球科学综合
CiteScore
10.10
自引率
7.90%
发文量
273
审稿时长
15 months
期刊介绍: Hydrology and Earth System Sciences (HESS) is a not-for-profit international two-stage open-access journal for the publication of original research in hydrology. HESS encourages and supports fundamental and applied research that advances the understanding of hydrological systems, their role in providing water for ecosystems and society, and the role of the water cycle in the functioning of the Earth system. A multi-disciplinary approach is encouraged that broadens the hydrological perspective and the advancement of hydrological science through integration with other cognate sciences and cross-fertilization across disciplinary boundaries.
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