Karst aquifer investigation using absolute gravity

Camp, M.; Meus, Philippe; Quinif, Yves; Kaufmann, O.; Ruymbeke, M. Van; Vandiepenbeck, Marc; Camelbeeck, Thierry

doi:10.1029/2006eo300005

Cited by 17 publications

(28 citation statements)

References 2 publications

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“…Different studies focus on the relationship of in-situ and satellite gravity measurements (Crossley et al, 2003;Hinderer et al, 2006;Neumeyer et al, 2006). However, only few studies examined the relationship between local gravity variations and discharge (Van Camp et al, 2006a;Jacob et al, 2008;Lampitelli and Francis, 2010;Kroner and Weise, 2011). For example, Lampitelli and Francis (2010) concluded for the Alzette River in Luxembourg that temporal gravity measurements do not improve the prediction of discharge.…”

Section: Introductionmentioning

confidence: 99%

Storage-discharge relationships at different catchment scales based on local high-precision gravimetry

et al. 2013

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In hydrology, the storage-discharge relationship is a fundamental catchment property.Understanding what controls this relationship is at the core of catchment science. To date, there are no direct methods to measure water storage at catchment scales (10 ; correlation coefficients = -0.11). The geologic setting in the region can explain both the disconnection between local water storage and headwater runoff, and the connectivity between headwater storage and streams draining larger catchment areas.More research is required to understand what controls the form of the observed storagedischarge relationships at the catchment scale. This study demonstrates that high-precision gravimetry can provide new insights into the complex relationship between state and response of hydrological systems.

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Section: Introductionmentioning

confidence: 99%

Storage-discharge relationships at different catchment scales based on local high-precision gravimetry

et al. 2013

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“…Gravity methods are nowadays pertinent tools for hydrogeological studies in various contexts (Van Camp et al, 2006a;Davis et al, 2008). The value of the gravity at Earth surface is indeed directly influenced by underground rock density.…”

Section: ) Introductionmentioning

confidence: 99%

“…Therefore, a collection of geophysical observations at intermediate scale can be valuable for constraining distributed modeling studies and more understanding of epikarst processes. Various geophysical tools are used to monitor, at an intermediate scale, transfer and storage properties such as Magnetic Resonance Sounding (MRS) (Legchenko et al 2002), 4D seismic (Wu et al, 2006;Valois, 2011), Electrical Resistivity Tomography (ERT) (Valois, 2011) and gravity measurements (Van Camp et al, 2006a;Jacob et al, 2010) among others. Both distributed geophysical measurements (ERT, 4D seismic) and integrative methods (MRS, gravity) revealed spatial variations associated to medium heterogeneities.…”

Section: ) Introductionmentioning

confidence: 99%

Estimating epikarst water storage by time-lapse surface to depth gravity measurements

Champollion¹,

Devile²,

Chéry³

et al. 2017

Preprint

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Abstract:In this study we attempt to evaluate the magnitude of epikarstic water storage variation in various karst settings using a relative spring gravimeter. Gravity measurements are performed two times a year at the surface and inside caves at different depths on three karst hydrosystems in southern France: two limestone karst systems and one dolomite karst system. We find that water storage variations occur mainly in the first ten meters of karst unsaturated zone. Afterward, surface to depth gravity measurements are compared between the sites with respect of net water inflow. A difference of seasonal water storage is evidenced probably associated with the lithology. The transmissive function of the epikarst has been partially deduced from the water storage change estimation. Long (> 6 months) and short (< 6 months) transfer time are revealed in the dolomite and in the limestone respectively.

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“…Heavy rainfall periods, intense storms or snow melting periods increase the runoff, swelling the rivers, which causes flash floods to occur in the caves of the system. Flash flood events may temporary rise the saturated zone to a maximum of 174 m AOD (Van Camp et al, 2006;Watlet et al, 2017) which detrimentally affects the main cavities of the RCL area.…”

Section: Introductionmentioning

confidence: 99%

Imaging groundwater infiltration dynamics in karst vadose zone with long-term ERT monitoring

Watlet¹,

Kaufmann²,

Triantafyllou³

et al. 2017

Preprint

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Abstract. Water infiltration and recharge processes in karst systems are complex and difficult to measure with conventional hydrological methods. Especially, temporarily saturated groundwater reservoirs hosted in the 15 vadose zone can play a buffering role in water infiltration. This results from the pronounced porosity and permeability contrasts created by local karstification processes of carbonated rocks. Analyses of time-lapse 2-D geoelectrical imaging over a period of three years at the Rochefort Cave Laboratory (RCL) site in South Belgium highlight variable hydrodynamics in a karst vadose zone. These data were compared to conventional hydrological measurements (drip discharge monitoring, soil moisture and water conductivity data sets) and a 20 detailed structural analysis of the local geological structures providing a thorough understanding of the groundwater infiltration. Seasonal changes affect all the imaged areas leading to increases in resistivity in spring/summer attributed to enhanced evapotranspiration, whereas winter is characterised by a general decrease in resistivity associated with a groundwater recharge of the vadose zone. Three types of hydrological dynamics, corresponding to areas with distinct lithological and structural features, could be identified via changes in 25 resistivity: (i) upper conductive layers, associated with clay-rich soil and epikarst, showing the highest variability related to weather conditions; (ii) deeper and more resistive limestone areas, characterised by variable degrees of porosity and clay contents, hence showing more diffuse seasonal variations; (iii) a conductive fractured zone associated with damped seasonal dynamics, while showing a great variability similar to that of the upper layers in response to rainfall events. This study provides detailed images of the sources of drip discharge spots 30 traditionally monitored in caves and aims to support modelling approaches of karst hydrological processes.

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Karst aquifer investigation using absolute gravity

Cited by 17 publications

References 2 publications

Storage-discharge relationships at different catchment scales based on local high-precision gravimetry

Storage-discharge relationships at different catchment scales based on local high-precision gravimetry

Estimating epikarst water storage by time-lapse surface to depth gravity measurements

Imaging groundwater infiltration dynamics in karst vadose zone with long-term ERT monitoring

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