Theory of earth tide and barometric effects in porous formations with compressible grains

Kamp, Garth van der; Gale, J.E.

doi:10.1029/wr019i002p00538

Cited by 286 publications

(184 citation statements)

References 23 publications

(28 reference statements)

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“…We present here an alternative procedure by which the combined estimate of surface water storage variation is obtained directly from raw piezometric water levels without the necessity for input of an explicit barometric or Earth tide correction. Barometric effects can be easily removed in any case but Earth tides may not always be so readily eliminated because local influences can result in the recorded Earth tide not being a simple function of the solar/lunar tidal potential (van der Kamp and Gale, 1983). Barr et al (2000) were able to filter out Earth tides in their Canadian study site using the theoretical tidal potential but we were unable to achieve this with water level data at our site in New Zealand.…”

Section: Introductionmentioning

confidence: 91%

An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter

Bardsley

Campbell

2007

Journal of Hydrology

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Field studies have demonstrated that ground surface rainfall accumulation can be detected at depth by synchronous increases in static confined groundwater pore pressures. This opens the way for "geological weighing lysimeters" providing disturbance-free water storage monitoring of the surface environment, in effect by weighing a significant land area in real time. Such systems require specific hydrogeological conditions which are not easily verified by field observations and replicated observations from multiple geological formations are a prerequisite for quality control. Given replication over two monitored formations, we introduce an expression which utilises the respective formation piezometric water levels to give an improved combined estimate of the ground surface water budget. The expression utilises raw piezometric levels and has the advantage of direct correction for Earth tide noise, which may sometimes be influenced by local effects in addition to the pure solar/lunar tidal potential. The expression is particularly simple if the two formations have similar (but possibly unknown) undrained Poisson ratios and porosities. Surface water budgets can then be estimated using only the respective formation barometric coefficients and piezometric levels. An example application to two vertically separated confined aquifers at a New Zealand site indicate an improved accuracy over singleformation observations. The two-formation expression for surface storage could find use as an accurate water budget tool with particular application to monitoring diffuse hydrological systems such as wetlands, arid regions, and heavily forested localities.

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Section: Introductionmentioning

confidence: 91%

An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter

Bardsley

Campbell

2007

Journal of Hydrology

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“…Vertical groundwater flow into and out of the partially confined aquifer (Rojstaczer 1988 a, b;Van der Kamp and Gale, 1983).…”

Section: Discussionmentioning

confidence: 99%

Analyses of Tidal Fluctuations of Groundwater Discharge.

Koizumi

1991

J,Phys,Earth

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Groundwater discharge, temperature and electrical conductivity of an artesian well were measured at Nishiawakura, Okayama Prefecture, southwest, Japan. The groundwater discharge showed tidal fluctuations of about 50 cm3/s induced by the tidal strain. Although the groundwater temperature also reflected the same tidal fluctuations as the discharge, the electrical conductivity did not manifest any tidal fluctuations. The discharge response to , the tidal strain for the diurnal frequency constituents is different from that for the semi-diurnal frequency constituents. The response theory of a partially confined aquifer to the tidal strain, which has been used for explanation of the well water level fluctuations, can quantitatively explain these fluctuations of the discharge. It seems important that the theory could also be applied to the real groundwater flow fluctuations induced by the crustal strain because the strain-induced groundwater movement is considered to have close relation to geothermal and geochemical precursors to earthquakes.

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“…Using these measurement data represents a challenging task for EPR, since their quality is partially compromised by background noise and unknown extra inputs. In natural groundwater systems, the water table response to precipitation results from multiple effects including: rainfall intensity distribution, pumping, evapotranspiration, atmosphere pressure, sea and earth tide, and other irregular noises (Van der Kamp & Gale, 1983;Wittenberg, 2003). No reliable data are available on pumping rates at local wells in the area throughout the entire period, or on evapotranspiration rates that could be appraised only from temperature data based on empirical methods.…”

Section: Hydrogeological Framework and Background Informationmentioning

confidence: 99%

Inferring groundwater system dynamics from hydrological time-series data

Doglioni

Mancarella

Simeone

et al. 2010

Hydrological Sciences Journal

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The problem of identifying and reproducing the hydrological behaviour of groundwater systems can often be set in terms of ordinary differential equations relating the inputs and outputs of their physical components under simplifying assumptions. Conceptual linear and nonlinear models described as ordinary differential equations are widely used in hydrology and can be found in several studies. Groundwater systems can be described conceptually as an interlinked reservoir model structured as a series of nonlinear tanks, so that the groundwater table can be schematized as the water level in one of the interconnected tanks. In this work, we propose a methodology for inferring the dynamics of a groundwater system response to rainfall, based on recorded time series data. The use of evolutionary techniques to infer differential equations from data in order to obtain their intrinsic phenomenological dynamics has been investigated recently by a few authors and is referred to as evolutionary modelling. A strategy named Evolutionary Polynomial Regression (EPR) has been applied to a real hydrogeological system, the shallow unconfined aquifer of Brindisi, southern Italy, for which 528 recorded monthly data over a 44-year period are available. The EPR returns a set of non-dominated models, as ordinary differential equations, reproducing the system dynamics. The choice of the representative model can be made both on the basis of its performance against a test data set and based on its incorporation of terms that actually entail physical meaning with respect to the conceptualization of the system. Key words groundwater; conceptual model; ordinary differential equations; evolutionary modelling; shallow aquifer Inférer la dynamique du système hydrogéologique à partir de séries des données hydrologiques Résumé Le problème de l'identification et de la reproduction du comportement hydrologique des systèmes hydrogéologiques peut souvent être posé en termes d'équations différentielles ordinaires relatives aux entrées et aux sorties de leurs composantes physiques, avec des hypothèses simplificatrices. Des modèles conceptuels linéaires et non-linéaires décrits sous forme d'équations différentielles ordinaires sont largement utilisés en hydrologie et peuvent être trouvés dans plusieurs études. Les systémes hydrogéologiques peuvent être décrits sur le plan conceptuel par un modèle de réservoirs interdépendants structuré comme une série de réservoirs nonlinéaires, de sorte que le niveau de la nappe peut être schématisé comme étant le niveau d'eau dans léun des réservoirs interconnectés. Dans ce travail, nous proposons une méthodologie permettant d'inférer la dynamique de la réponse d'un systéme hydrogéologique aux précipitations, sur la base de données temporelles enregistrées. L'utilisation de techniques évolutives pour déduire les équations différentielles à partir de données afin d'obtenir leur dynamique phénoménologique intrinséque a été étudiée récemment par quelques auteurs et est appelée modélisation évolutive. Une stratégie...

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Theory of earth tide and barometric effects in porous formations with compressible grains

Cited by 286 publications

References 23 publications

An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter

An expression for land surface water storage monitoring using a two-formation geological weighing lysimeter

Analyses of Tidal Fluctuations of Groundwater Discharge.

Inferring groundwater system dynamics from hydrological time-series data

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