الكشف عن الفجوات الصخرية باستخدام التصوير ثنائي الأبعاد للمقاومية الكهربائية في حوض الشريعة (شمال شرق الجزائر)

Fehdi, Chemseddine; Bâali, Fethi; Boubaya, Djamel; Rouabhia, Abdelkader

doi:10.1007/s12517-009-0117-2

Cited by 30 publications

(16 citation statements)

References 20 publications

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“…It could be applied in a wide variety of fields such as ground water and un-derground mineral explorations, Geotechnical and environmental investigations and archeological studies [1][2][3][4][5] and [6]. The purpose of electrical resistivity surveys is to determine underground resistivity contrasts by making measurements on the ground surface, which result in electrical anomalies of subsurface materials [7].…”

Section: Introductionmentioning

confidence: 99%

CRSP, numerical results for an electrical resistivity array to detect underground cavities

Amini¹,

Ramazi²

2017

Open Geosciences

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This paper is devoted to the application of the Combined Resistivity Sounding and Profiling electrode configuration (CRSP) to detect underground cavities. Electrical resistivity surveying is among the most favorite geophysical methods due to its nondestructive and economical properties in a wide range of geosciences. Several types of the electrode arrays are applied to detect different certain objectives. In one hand, the electrode array plays an important role in determination of output resolution and depth of investigations in all resistivity surveys. On the other hand, they have their own merits and demerits in terms of depth of investigations, signal strength, and sensitivity to resistivity variations. In this article several synthetic models, simulating different conditions of cavity occurrence, were used to examine the responses of some conventional electrode arrays and also CRSP array. The results showed that CRSP electrode configuration can detect the desired objectives with a higher resolution rather than some other types of arrays. Also a field case study was discussed in which electrical resistivity approach was conducted in Abshenasan expressway (Tehran, Iran) U-turn bridge site for detecting potential cavities and/or filling loose materials. The results led to detect an aqueduct tunnel passing beneath the study area.

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Section: Introductionmentioning

confidence: 99%

CRSP, numerical results for an electrical resistivity array to detect underground cavities

Amini¹,

Ramazi²

2017

Open Geosciences

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“…The Eocene limestone Aquifer System is considered to be one of the most significant and potable groundwater aquifer in the Cheria basin [16,22]. The perennial water available in the study area is from the Eocene limestone aquifer.…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

“…The perennial water available in the study area is from the Eocene limestone aquifer. The Marly-limestone bedrock forms the boundaries of the groundwater reservoir [16,22]. The thickness of the Eocene limestone aquifer increases towards the central part of the basin [23], it is considered as a broadly closed system, as it has natural boundaries to the east and southeast formed by the Djabel Achour and Dokkan and is bounded to the south by Djabel Zora and Boukammech and west by Djebel Kamellel and Djabel El Abtine and North by Djabel Troubia and Djabel Tazbent.…”

Section: Geological and Hydrogeological Settingmentioning

confidence: 99%

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Application of Microgravimetry to Assessing Collapse Risk in Carbonate Sinkhole Areas, Cheria Basin, Northeast of Algeria

Saddek¹,

Fehdi²,

Boubaya³

2017

JLS

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This study presents the results and the interpretation of a microgravity survey realized in the MChentel zone near Cheria tone situated in the Northeast Algerian. The microgravity survey, made during April and March, 2016, allowed the obtaining of 614 measures distributed on the whole zone of study. The gravimetric data were measured by means of a gravimeter relative GNU-KC 444 were used with location and the height of stations with centimetric precision by pocket GPS and an electronic theodolite type Qeo FET 420 k. The gravimetric data measured on the ground were connected with a reference gravimetric station situated near the zone of study. On the scale of the zone of study, the gravimetric data show a decrease of the values of the anomaly of Bouguer between both collapses. This trend implies probably an effect of karstification which would explain the decrease of the values of the anomaly of Bouguer by going to the center of the studied zone. The interpretation of gravimetric data shows the presence essentially of two negative zones, they present a deficit of in-depth mass which can be 30 meters.

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“…A RMS error can be a good quantitative indicator for a model quality, but not necessary for actual geological conditions in subsurface. If possible, every model should be evaluated based on existing geological investigations of an area and borehole data (Fehdi et al, 2011;loke, 2014). …”

Section: Electrical Resistivity Tomographymentioning

confidence: 99%

Electrical resistivity tomography investigations along the planned dykes of the HPP Brežice water accumulation basin

Rajh¹,

Car²,

Gosar³

2014

Geologija

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Geophysical investigations were conducted using electrical resistivity tomography (ERT) along planned dykes of the HPP Brežice water accumulation basin. The ERT profile is 7.3 km long and is located on the right riverbank of the Sava River on the Kr{ko-Brežice field (E Slovenia). A purpose of the investigations was to determine a boundary between semipermeable Miocene and permeable Plio-Quaternary (Pl-Q) and Quaternary (Q) sediments for the proper design of the jet grouting sealing curtain, which will prevent lateral outflow of water from the accumulation basin. In this paper we present processing of the section between 5100 and 6100 m of the profile line. In this section the measurement template was set to 25 depth levels, because a significant increase in a thickness of the Pl-Q sediments was expected. Modelling of the measured apparent electrical resistivity data was carried out with RES2DINV and RESIX 2DI inversion software. Different inversion parameters were used to create 15 geoelectrical models for each program, which were then compared and evaluated based on borehole data and on previous geological investigations of the area. With the final geoelectrical models it was possible to successfully determine areas of three expected stratigraphic members and limit an electrical resistivity range for each one of them. The boundary is well defined between Q and Pl-Q and also between Q and Miocene sediments with sharp contrast in electrical resistivity between them. A boundary between Pl-Q and Miocene sediments was not that obvious, but it was possible to determine its shape by the use of different inversion parameters. We propose a simplified geological cross section based on the interpreted geoelectrical models and borehole data. Izvle~ekGeofizikalne raziskave z metodo elektri~ne upornostne tomografije so bile izvedene po 7,3 km dolgemu profilu, ki poteka vzdolž na~rtovanih nasipov za HE Brežice na desnem bregu Save na Kr{ko-Breži{kem polju. Namen raziskav je bil dolo~iti mejo med polprepustnimi miocenskimi ter prepustnimi pliokvartarnimi (Pl-Q) in kvartarnimi (Q) sedimenti za na~rtovanje t.i. jet grouting tesnilne zavese, ki bo prepre~evala lateralni odtok vode iz akumulacijskega bazena. V ~lanku predstavljamo obdelavo odseka med 5100 in 6100 m profila na katerem smo pri~akovali za~etek pojavljanja ve~je debeline Pl-Q sedimentov, zato smo meritve izvedli na 25 globinskih nivojih. Modeliranje izmerjenih podatkov navidezne elektri~ne upornosti je potekalo s programoma RES2DINV in RESIX 2DI z uporabo razli~nih parametrov pri izdelavi modelov. Te smo med seboj primerjali in vrednotili na podlagi preteklih geolo{kih raziskav obmo~ja in podatkov vrtin. Z vsakim programom smo izdelali 15 razli~nih modelov. S kon~nimi modeli smo lahko uspe{no opredelili obmo~ja pojavljanja treh pri~akovanih stratigrafskih ~lenov in za vsakega podali razpon modeliranih elektri~nih upornosti. Na modelih je dobro viden potek meje med Q in Pl-Q ter med Q in miocenskimi sedimenti z velikim medsebojnim kontrastom v elektri~ni uporno...

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الكشف عن الفجوات الصخرية باستخدام التصوير ثنائي الأبعاد للمقاومية الكهربائية في حوض الشريعة (شمال شرق الجزائر)

Cited by 30 publications

References 20 publications

CRSP, numerical results for an electrical resistivity array to detect underground cavities

CRSP, numerical results for an electrical resistivity array to detect underground cavities

Application of Microgravimetry to Assessing Collapse Risk in Carbonate Sinkhole Areas, Cheria Basin, Northeast of Algeria

Electrical resistivity tomography investigations along the planned dykes of the HPP Brežice water accumulation basin

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