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Technical Note: Disentangling the groundwater response to Earth and atmospheric tides to improve subsurface characterisation

Rau, Gabriel C., Cuthbert, Mark O., Acworth, R. Ian and Blum, Philipp 2020. Technical Note: Disentangling the groundwater response to Earth and atmospheric tides to improve subsurface characterisation. Hydrology and Earth System Sciences 24 , pp. 6033-6046. 10.5194/hess-24-6033-2020

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Abstract

The groundwater response to Earth tides and atmospheric pressure changes can be used to understand subsurface processes and estimate hydraulic and hydro-mechanical properties. We develop a generalised frequency domain approach to disentangle the impacts of Earth and atmospheric tides on groundwater level responses. By considering the complex harmonic properties of the signal, we improve upon a previous method for quantifying barometric efficiency (BE), while simultaneously assessing system confinement and estimating hydraulic conductivity and specific storage. We demonstrate and validate this novel approach using an example barometric and groundwater pressure record with strong Earth tide influences. Our method enables improved and rapid assessment of subsurface processes and properties using standard pressure measurements.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Additional Information: This work is distributed under the Creative Commons Attribution 4.0 License
Publisher: European Geosciences Union (EGU) / Copernicus Publications
ISSN: 1027-5606
Date of First Compliant Deposit: 17 November 2020
Date of Acceptance: 7 November 2020
Last Modified: 19 Jan 2021 03:53
URI: http://orca.cardiff.ac.uk/id/eprint/136427

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