Geoelectric structure of the Ein Gedi sinkhole occurrence site at the Dead Sea shore in Israel

Ezersky, M.

doi:10.1016/j.jappgeo.2007.12.003

Cited by 50 publications

(27 citation statements)

References 19 publications

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“…Evaluation of DS water salinity based on bulk resistivity, mapping of sinkhole development sites; estimation of salt layer thickness Transient Electromagnetic (TEM, TDEM) Al-Zoubi et al, 2007;Ezersky, 2008;Frumkin et al, 2011 Detection of sinkhole sites based on high resistivity; study of resistivity structure of subsurface, Electric Resistivity Tomography (ERT) Legchenko et al, 2004, Legchenko et al,2006a2008a, b;2011;Ezersky et al, 2010 Determination of water content (Wi), relaxation time (T 1 ) and hydraulic conductivity (K) of the subsurface, evaluation of water saturated caves volume. In practice, a karst aquifer generally is composed of karst channels and caverns.…”

Section: Main Results Methodsmentioning

confidence: 99%

“…It permits to locate the top of the DS brine as 1 Ωm or 0.5 Ωm interface with a high accuracy, minimal equivalency and to distinguish between salty and brackish water (Goldman et al, 1991;Kafri et al, 1997;Ezersky et al, 2011). Anomalous high resistivity of the sinkhole development sites was discovered in alluvial fans in Israel and Jordan (Ezersky, 2008, Al-Zoubi et al, 2007. It allows effectively mapping the sinkhole hazardous zones.…”

Section: Geophysical Methods To Investigate the Sinkhole Problemmentioning

confidence: 99%

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Overview of the geophysical studies in the Dead Sea coastal area related to evaporite karst and recent sinkhole development

Ezersky¹,

Legchenko²,

Eppelbaum³

et al. 2017

IJS

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Abstract:Since the early 80s, a progressively increasing number of sinkholes appeared along the Dead Sea coastal line. It has been found that their appearance is strongly correlating with the lowering of the Dead Sea level taking place with the rate of approximately 1 m/yr. Location of areas affected by sinkhole development corresponds to location of the salt formation deposited during the latest Pleistocene, when the Lake Lisan receded to later become the Dead Sea. Water flowing to the Dead Sea from adjacent and underlying aquifers dissolves salt and creates caverns that cause ground subsidence and consequent formation of sinkholes. Before subsidence, these caverns are not visible on the surface but can be investigated with surface geophysical methods. For that, we applied Surface Nuclear Magnetic Resonance (SNMR), Transient Electromagnetic (TEM) Seismic refraction and reflection, Multichannel Analysis of Surface waves (MASW), microgravity and magnetic surveys and their combinations. Our geophysical results allowed us to locate the salt formation and to detect caverns in salt thus contributing to better understanding sinkhole development mechanisms. Comparison of sinkhole appearance along the western DS shore derived from the recent database (2017) shows that predictions made on the base of geophysical data (2005)(2006)(2007)(2008) are now confirmed thus demonstrating efficiency of our study. In this paper, we briefly present a summary of up to date knowledge of the geology and hydrogeology of Dead Sea basin, of the physical properties of the salt rock and the most popular models explaining mechanisms of sinkhole development. We also share our experience gained during geophysical studies carried out in the framework of national and international research projects in this area for the last 20 years.Dead Sea, evaporate karst, geophysics, sinkholes Ezersky M.G., Legchenko A., Eppelbaum L. and Al-Zoubi A., 2017. Overview of the geophysical studies in the Dead Sea coastal area related to evaporite karst and recent sinkhole development.

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Section: Main Results Methodsmentioning

confidence: 99%

Section: Geophysical Methods To Investigate the Sinkhole Problemmentioning

confidence: 99%

Overview of the geophysical studies in the Dead Sea coastal area related to evaporite karst and recent sinkhole development

Ezersky¹,

Legchenko²,

Eppelbaum³

et al. 2017

IJS

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show abstract

“…To obtain subsurface information about the near-surface materials with non-invasive techniques, the highest resolution is achieved using Ground Penetrating Radar (GPR) techniques (Marcak et al, 2008;Gutiérrez et al, 2009;Pueyo-Anchuela et al, 2009;Gutiérrez et al, 2011;Ercoli et al, 2013). Electrical Resistivity Tomography (ERT) and other active or passive electrical methods, such as self-potential (SP) and electromagnetic (EM) surveys, are often used to investigate the subsurface at different depths that ordinarily do not exceed 100 m (e.g., Van Schoor, 2002;Jardani et al, 2007;Ezersky, 2008;Pepe et al, 2015).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A multidisciplinary approach in sinkhole analysis: The Quinis village case study (NE-Italy)

Zini

Calligaris

Forte

et al. 2015

Engineering Geology

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“…It was also shown that Sclumberger and Wenner arrays have less noise contamination and better signal-tonoise ratios than dipole-dipole array (Dahlin and Zhou 2004) that makes them to be a better candidate for landfill characterization. Moreover, Ezersky (2008) showed that Wenner array does allow subsurface caves describing with suitable accuracy. These were the reasons to use Wenner and Schlumberger arrays in our investigations.…”

Section: Methodsmentioning

confidence: 99%

Geophysical-geochemical investigation of fire-prone landfills

et al. 2009

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This paper deals with the integration of electrical resistivity tomography and geochemical methods for studying four different fire-prone landfills. Landfill gas composition (CH 4 , H 2 S, O 2 , CO, CO 2 ) and subsurface temperature were measured with the constant net 50 9 50 m from the depth 10-60 cm. 28 electrical resistivity tomography lines were surveyed, while Wenner and Sclumberger electrode arrays were employed for all measurements. At the studied sites the landfill gas and temperature measurements mapped gas and temperature anomalies over underground fire sources. 2D electrical resistivity tomography lines, performed over these anomalies, showed these fire sources as high-resistivity zones. The joint employment of the electrical imaging and geochemical survey seems to be a useful tool in carrying out diagnostic investigations at fire-prone landfills.

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Geoelectric structure of the Ein Gedi sinkhole occurrence site at the Dead Sea shore in Israel

Cited by 50 publications

References 19 publications

Overview of the geophysical studies in the Dead Sea coastal area related to evaporite karst and recent sinkhole development

Overview of the geophysical studies in the Dead Sea coastal area related to evaporite karst and recent sinkhole development

A multidisciplinary approach in sinkhole analysis: The Quinis village case study (NE-Italy)

Geophysical-geochemical investigation of fire-prone landfills

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