Impact of the geologic setting on the groundwater using geoelectrical sounding in the area southwest of Sohag – Upper Egypt

Mahmoud, Hussein Hosni; Tawfik, M.

doi:10.1016/j.jafrearsci.2015.01.004

Cited by 11 publications

(5 citation statements)

References 4 publications

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“…The geoelectric layers (A, B, C, D) have a large lateral extension with varying thickness, especially near the cultivated floodplain. Some of the geoelectric layers were missed toward the plateau due to the possible effect of normal faulting and the presence of the faulted Eocene limestone blocks (layer E) that has unusual high resistivity values varying from 8967 to 16,877 Ω.m (e.g., Mahmoud and Tawfik, 2015) [74].…”

Section: Analysis and Interpretation Of Ves Datamentioning

confidence: 99%

Mapping the Groundwater Potentiality of West Qena Area, Egypt, Using Integrated Remote Sensing and Hydro-Geophysical Techniques

et al. 2020

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The integrated use of remote sensing imagery and hydro-geophysical field surveys is a well-established approach to map the hydrogeological framework, and thus explore and evaluate the groundwater potentiality of desert lands, where groundwater is considered as the main source of freshwater. This study uses such integrated approach to map the groundwater potentiality of the desert alluvial floodplain of the Nile Valley west of Qena, Egypt, as alternative water source to the River Nile. Typically ground gradient, faults and their stress field, lateral variation of rock permeability, drainage patterns, watersheds, rainfall, lithology, and soil types are the main factors believed to affect the groundwater recharge and storage from the infiltration of present-time and paleo-runoff. Following this generally accepted approach, different remote sensing data sets (SRTM DEM, Landsat-8, ALOS/PALSAR-1, Sentinel-1, and TRMM) as well as auxiliary maps (geological and soil maps) were used to identify and map these factors and prepare thematic maps portraying the different influences they exert on the groundwater recharge. These thematic maps were overlaid and integrated using weights in a GIS framework to generate the groundwater potentiality map which categorizes the different recharge capabilities into five zones. Moreover, the aeromagnetic data were processed to map the deep-seated structures and estimate the depth to basement rocks that may control the groundwater occurrence. In addition, the vertical electrical sounding (VES) measurements were applied and calibrated with the available borehole data to delineate the subsurface geological and hydrogeological setting as well as the groundwater aquifers. Different geoelectric cross-sections and hydro-geophysical maps were constructed using the borehole information and VES interpretation results to show the lateral extension of the different lithological units, groundwater-bearing zones, water table, and the saturated thickness of the aquifer. The GIS model and geophysical results show that the southwest part of Nag’a Hammadi-El-Ghoneimia stretch has very high recharge and storage potentiality and is characterized by the presence of two groundwater-bearing zones. The shallow groundwater aquifer is located at a depth of 30 m with a saturation thickness of more than 43 m. However, there are NW–SE faults crossing the study area and most likely serve as recharge conduits by connecting the shallow aquifer with the deeper ones. Such aquifers connection has been confirmed by investigating the chemical and isotopic composition of their groundwater.

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Section: Analysis and Interpretation Of Ves Datamentioning

confidence: 99%

Mapping the Groundwater Potentiality of West Qena Area, Egypt, Using Integrated Remote Sensing and Hydro-Geophysical Techniques

et al. 2020

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“…VES is extensively utilised in groundwater mapping and engineering problems. However, it is based on measurements of electrical contrasts produced by direct current penetrate into the underground providing details on subsurface characteristics (Kumar et al 2014;Michael and Stephen 2014;Mahmoud and Tawfik 2015). In addition, TDEM belongs to active geophysical methods that utilise induced electric currents and electromagnetic fields to differentiate subsurface conditions (Stewart and Gay 1986;Auken et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Integration of electrical resistivity and time-domain electromagnetic to investigate the subsurface stratigraphic conditions at Assiut Power Plant, Assiut, Egypt

Atya

Meneisy

Bedair

2020

NRIAG Journal of Astronomy and Geophysics

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The present work was proposed to prospect the subsurface stratigraphy and hydrogeological conditions for estimating the most suitable lithology and depth for hosting the power plant disposals without harming the underground water aquifers and soils. Two geophysical approaches were utilised to achieve the goal of this work, the Vertical Electric Sounding (VES) technique and Transient Time Domain Electromagnetic (TDEM). Seven VESes of AB/2 ranging between 300 and 900 metres were conducted reaching depths between 150 and 272 metres. On the other hand, "TDEM" was conducted on two localities in the site utilising laid 400 × 400 metres and 200 × 200 metres loop for transmitting EM field reaching about 1150 metres depth. The interpreted data show that the upper 200 metres represent 3 to 4 geoelectric layers whereas groundwater is found within the uppermost 100 metres and sometimes nearest to the ground's surface. Moreover, at depths starting from 800 metres up to the maximum reached depth 1150 metres show a layer of almost similar resistivity which can be interpreted as a huge thickness of limestone, with particular moisture fractures. The similarity of the resistivity values guides to expect that the moisture represent some fluid seeps on the structural plains and does not rise to be an aquifer of open recharge sources. Therefore, the present study has conducted that it is safe for the power plant disposals to be buried from a depth beginning at least from 850 metres below the surface of the ground.

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“…Geological and hydrological studies in lagoons reefs in Lake Muri (Cook Islands), was performed by the acquisition of 28 Electrical Resistivity Tomography (ERT) lines, using a SuperStingR8 tomograph (Befus et al, 2014). The studies of resistivity developed in the southwest of Sohag (Upper Egypt) determined the impact of the geological environment on the occurrence of groundwater, by characterizing (qualitatively and quantitatively) descriptive geoelectric profiles (Mahmoud and Tawfik, 2015). The subsurface stratigraphy and the structures around the Dakhla oasis (Egypt) were determined through the interpretation of 10 Vertical Electric Soundings (VES) with the Schlumberger distribution and the IPI2Win software (Mohamaden, 2016).…”

Section: Introductionmentioning

confidence: 99%

Processing of synthetic data for the treatment of geoelectric information for hydrogeological purposes of the Málaga town, Santander (Colombia)

Rincón-Jaimes

Ríos‒Reyes

Chacón-Ávila

et al. 2019

revbol

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Málaga town presents a serious problem caused by the insufficient environmental offer of the superficial water resource to supply the dotation corresponding to the needs of the urban area. Although the geographic and geological location generates optimal conditions for the occurrence of groundwater, studies on the existence, location and availability are incomplete and fragmented, and in general, there is no information about the hidryc resource. The main objective of the present paper pretends to build through the applied geophysical prospection Vertical Electric Sounding (VES) and Electrical Resistivity Tomography (ERT) the 2D model of electrical resistivity of the subsurface, from the processing of synthetic data to the treatment of geoelectrical information with hydrogeological purposes. The data acquisition and processing allowed the interpretation, from the geoelectric point of view and the basic analysis of the 1D profiles and the 2D models developed; demonstrating the presence of highly fractured aquifers that can provide the municipal supply in the future; results that establish the first step in the evaluation of Málaga’s water resources

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Impact of the geologic setting on the groundwater using geoelectrical sounding in the area southwest of Sohag – Upper Egypt

Cited by 11 publications

References 4 publications

Mapping the Groundwater Potentiality of West Qena Area, Egypt, Using Integrated Remote Sensing and Hydro-Geophysical Techniques

Mapping the Groundwater Potentiality of West Qena Area, Egypt, Using Integrated Remote Sensing and Hydro-Geophysical Techniques

Integration of electrical resistivity and time-domain electromagnetic to investigate the subsurface stratigraphic conditions at Assiut Power Plant, Assiut, Egypt

Processing of synthetic data for the treatment of geoelectric information for hydrogeological purposes of the Málaga town, Santander (Colombia)

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