Investigating karst aquifers: Using pseudo 3-D electrical resistivity tomography to identify major karst features

Torrese, Patrizio

doi:10.1016/j.jhydrol.2019.124257

Cited by 30 publications

(12 citation statements)

References 36 publications

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“…Electrical resistivity tomography (ERT) is a proven imaging technique well-suited to identifying karst features and partially characterizing karst aquifers [1]: "Karst features can be predominantly air-filled, making them highly resistive (e.g., >1000 Ω•m), or partially or completely water-filled (e.g., 60-1000 Ω•m); in the latter case, depending on the ionic concentration of the groundwater, karst features may have a bulk conductivity ranging from very conductive (e.g., 60-100 Ω•m) to relatively conductive (e.g., 100-250 Ω•m), compared to the host rock(e.g., >2000 Ω•m for not karst limestone). Karst features may also be filled by highly weathered material, such as clays, in which case they will be conductive relative to the host rock (e.g., 60-150 Ω•m).…”

Section: Introductionmentioning

confidence: 99%

Contribution of Full Wave Acoustic Logging to the Detection and Prediction of Karstic Bodies

Mari

Porel

Delay

2020

Water

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A 3D seismic survey was done on a near surface karstic reservoir located at the hydrogeological experimental site (HES) of the University of Poitiers (France). The processing of the 3D data led to obtaining a 3D velocity block in depth. The velocity block was converted in pseudo porosity. The resulting 3D seismic pseudo-porosity block reveals three high-porosity, presumably-water-productive layers, at depths of 30–40, 85–87 and 110–115 m. This paper shows how full wave acoustic logging (FWAL) can be used to validate the results obtained from the 3D seismic survey if the karstic body has a lateral extension over several seismic. If karstic bodies have a small extension, FWAL in open hole can be fruitfully used to: detect highly permeable bodies, thanks to measurements of acoustic energy and attenuation; detect the presence of karstic bodies characterized by a very strong attenuation of the different wave trains and a loss of continuity of acoustic sections; confirm the results obtained by vertical seismic profile (VSP) data. The field example also shows that acoustic attenuation of the total wavefield as well as conversion of downward-going P-wave in Stoneley waves observed on VSP data are strongly correlated with the presence of flow.

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Section: Introductionmentioning

confidence: 99%

Contribution of Full Wave Acoustic Logging to the Detection and Prediction of Karstic Bodies

Mari

Porel

Delay

2020

Water

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“…ERT provides an image of the subsurface electrical resistivity pattern and allows for identification of subsurface structures. Its theory (Arato et al 2014;Athanasiou et al 2007;Buvat et al 2013;Dahlin and Loke 1998;Daily and Owen 1991;Loke et al 2003;Spiegel et al 1980) and application (Cassiani et al 2009;Daily and Ramirez 1992;Griffiths and Barker 1993;Guérin and Benderitter 1995;Guérin et al 2004;Kuras et al 2009;Ritz et al 1999;Torrese 2020) are well-documented in geophysical literature.…”

Section: Vlf-em and Electric Resistivity Methodsmentioning

confidence: 99%

“…There have been many applications of ERT and electrical methods in general to characterize aquifers (Coscia et al 2011;Meyerhoff et al 2014;Vogelgesang et al 2020), to delineate alluvial aquifer heterogeneity (Bowling et al 2005), thickness and bedrock structure (Gómez et al 2019), to monitor hydraulic processes (Kuras et al 2009) and aquifer discharge (Meyerhoff et al 2012), to map saline-water contamination (Kazakis et al 2016;Rainone et al 2015), and to detect karst features (Torrese 2020), sinkholes and cavities (Torrese et al 2021;Van Schoor 2002).…”

Section: Vlf-em and Electric Resistivity Methodsmentioning

confidence: 99%

Hydrochemical-geophysical study of saline paleo-water contamination in alluvial aquifers

Pilla

Torrese

2022

Hydrogeol J

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An integrated hydrochemical and geophysical study of the saline paleo-water uprising into the alluvial aquifer of the Oltrepò Pavese plain sector (Po Plain, northern Italy) is presented. This study involved hydrochemical analysis of groundwater, assessment of well logs, and one-, two- and three-dimensional electrical geophysical surveys. The studied area was selected for its characteristic hydrogeological setting. The alluvial aquifer is strongly conditioned by the presence of a buried tectonic discontinuity along which the saline waters are mainly distributed. These waters rise along the discontinuities in the bedrock and flow into the overlying alluvial aquifer. Contamination from saline waters is not spatially and vertically homogeneous within the aquifer. The spatial distribution of Na–Cl waters suggests the existence of plumes of highly mineralized waters that locally reach the aquifer, diffuse and mix with freshwaters. The saline waters show a dilution during upward migration, which is due to mixing with the shallow fresh groundwater. Highly mineralized groundwater is identified even at very shallow depth in correspondence with each plume. On the other hand, there is a lower degree of contamination in those sectors of the aquifer that are further away from the structural discontinuities and this lesser contamination generally only involves the deeper parts of the aquifer.

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“…Figure 2 (c-h) shows low resistivity, located in the western part of lines 1, 3, and 6 at a depth of 15 m to 40 m. That is interpreted as a layer of limestone saturated with water, and the clay layer is the main karst water channel (conduit) [10,40,41]. This spring is an open sinkhole located on lines 1 and 6.…”

Section: Low Resistivity Zonementioning

confidence: 99%

“…At moderate resistivity with a depth of 15-40 m, some researchers have interpreted it as a layer of limestone that is saturated with water and a layer of clay in the form of a karst main water channel (conduit) [10,40,41] with springs in the form of open sinkholes. However, it is different from lines 2 and 5, which are also indicated as moderate resistivity zones.…”

Section: Medium Resistivity Zonementioning

confidence: 99%

Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

Wahid¹,

Sunaryo²,

Susilo³

et al. 2022

IJDNE

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Karst zoning and channel aquifers in the karst basin at Sendang Biru Beach, Tambak Rejo Village have been investigated. Sendang Biru Beach has a cave appearance as a karst morphological feature and is composed of limestone. Seasonal karst water sources come from springs, surface runoff, underground rivers, channels in valleys, basins, and slopes that often experience drought. The purpose of this study is to identify the presence of karst aquifers and karstification zones that are prone to damage or disasters in the karst environment. The method used is a geophysical combination of Electrical Resistivity Tomography (ERT), Induced Polarization (IP), and Self Potential (SP). The results showed that the eastern part's karstification zone was characterized by moderate to high resistivity and a chargeability zone with a moderate to high range. In addition, the existence of karst aquifer channels in the anomalous zone of low resistivity, high chargeability, and negative natural potential. This zone is located in the Qas Formation, with the water flowing from west to east and from west to south. The inundated karst aquifer that spreads in a circular pattern with different depths interspersed by limestone cracks causes a heterogeneous karstification process.

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Investigating karst aquifers: Using pseudo 3-D electrical resistivity tomography to identify major karst features

Cited by 30 publications

References 36 publications

Contribution of Full Wave Acoustic Logging to the Detection and Prediction of Karstic Bodies

Contribution of Full Wave Acoustic Logging to the Detection and Prediction of Karstic Bodies

Hydrochemical-geophysical study of saline paleo-water contamination in alluvial aquifers

Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

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