Two Dimensional Electrical Imaging of Quaternary Aquifer at Wadi Muraykhat and Wadi Sa’a, Al Ain Area, UAE

Mahmoudi, Ahmed El; Gabr, Amir

doi:10.3997/2214-4609-pdb.13.b052

Cited by 3 publications

(10 citation statements)

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“…Most of these clastic units contain a clay-rich calcareous matrix. This alluvium was deposited on ood plains draining from the Oman mountains to the east [9].…”

Section: Hydrogeological Settingmentioning

confidence: 99%

2D Audio-magnetotelluric (Amt) Data Inversion of the Al-jaww Plain Area (Al-ain, United Arab Emirates) for Groundwater Investigations

Saibi

Alaran

Cherkose

2023

Preprint

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The United Arab Emirates (UAE) lies within the arid climate zone due to its low annual rainfall rates. The country’s freshwater is located primarily in shallow groundwater aquifers. Understanding the depth and extent of such aquifers is an important issue for UAE local governments and environmental agencies to ensure water supply needs are met. The hydrogeological conditions of the UAE are strongly related to its topographic features, which are dominated by a mountain range in neighboring Oman on the eastern margin of the Arabian Platform. Alluvial plains, such as the Al-Jaww Plain (eastern Al-Ain city), are an important potential groundwater source for the Al-Ain region. Al-Jaww Plain is a large, flat area consisting of gravel and sand outwashes from the Al-Hajar Mountains. The main objective of this research is to investigate the study area’s electrical resistivity distribution and locate groundwater aquifers. In this research, the audio-magnetotelluric (AMT) method was applied, with measurements from 10 AMT stations recorded along an 11 km east–west profile in Al-Jaww Plain. The AMT method is a high-resolution, non-seismic geophysical technique that measures variations in the Earth's natural electromagnetic fields to detect subsurface electrical resistivity variations at shallow to intermediate depths. A two-dimensional resistivity inversion model was developed for the AMT data from the east–west profile. This model contains three main geo-electrical layers from the surface to 5 km depth, as follows: (1) a shallow layer with low resistivity (0–15 Ohm.m), representing the groundwater aquifer zone from the ground surface to a 1 km depth, (2) a moderately resistive layer (15–250 Ohm.m) beneath the first layer, and (3) the Hawasina Complex (> 250 Ohm.m) beginning at 2.5 km and extending to 5 km. The results of this study will support local government and water agencies to better manage groundwater resources in Al-Ain in the future.

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“…Most of these clastic units contain a clay-rich calcareous matrix. This alluvium was deposited on ood plains draining from the Oman mountains to the east [9].…”

Section: Hydrogeological Settingmentioning

confidence: 99%

2D Audio-magnetotelluric (Amt) Data Inversion of the Al-jaww Plain Area (Al-ain, United Arab Emirates) for Groundwater Investigations

Saibi

Alaran

Cherkose

2023

Preprint

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“…(a) Locations of the two experimental sites of the study, (b) aquifer schematics of the Liwa region (El‐Mahmoudi, 2007), (c) aquifer schematics of the Al Jaww Plain in Al Ain (EI‐Mahmoudi 2007) and (d) geological map of the Al Jaww Plain (Ali et al ., 2008). …”

Section: Field Experimentsmentioning

confidence: 99%

“…Two thrust faults ‘Hawasina thrust’ and ‘Semail thrust’ merge near the experimental site. The lithostratigraphy of the aquifer is obtained from rock samples and geophysical logging data in the nearest borehole (about 18 km north, El‐Mahmoudi, 2007) to the experimental site (Fig. 11c).…”

Section: Field Experimentsmentioning

confidence: 99%

A full‐range gradient survey for 2D electrical resistivity tomography

Zhou

Bouzidi

Ullah

et al. 2020

Near Surface Geophysics

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In this paper, we propose an enhanced version of the multi-gradient measurement technique, called full-range gradient survey, for 2D electrical resistivity tomography. To demonstrate its effectiveness, we conducted numerical simulations and field experiments to highlight the advantages of the new data-acquisition technique on the traditional electrode arrays and the original multi-gradient measurement technique. A comparison of the imaging capabilities of the full-range gradient technique with the dipole-dipole, Schlumberger and multi-gradient shows that the former inherits all the advantages of the multi-gradient technique as well as the sensitivity of the traditional three-and four-electrode arrays. The new survey technique has a better pseudo-section coverage, a much smaller geometrical factor, and less noise contamination than the dipole-dipole survey. It significantly improves the subsurface images of the Schlumberger and original multi-gradient data. The numerical and field experiments both demonstrate that the full-range gradient survey can be an alternative to all the traditional electrode arrays and original multi-gradient surveys of 2D electrical resistivity tomography to obtain better quality and higher resolution images of near-surface targets.

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“…In this study, we use a passive geophysical technique, the audio‐magnetotelluric (AMT) method, to map the subsurface electrical structure of the Al‐Jaww Plain. In addition, in order to extend the results of El Mahmoudi and Gabr (2006), we have decided to have a longer geophysical profile (11 km) and ENE‐WSW oriented traverse to make sure that the totality of Al Jaww plain is investigated. Magnetotelluric technique was chosen because it gives both shallow and deep electrical resistivity information, as opposed to ERT, which is restricted to shallow investigations.…”

Section: Introductionmentioning

confidence: 99%

“…The resistivity profile of El Mahmoudi and Gabr (2006) showed a resistive layer (>100 Ωm) extending from the surface to a depth of 40 m, which they interpreted as dry alluvium. This was underlain by a groundwater-bearing conductive layer of clay and mudstone located between 40 and 120 m depths (El Mahmoudi & Gabr, 2006). (Ali et al, 2008) showing the locations of audio-magnetotelluric stations, seismic, and borehole data.…”

mentioning

confidence: 97%

Audio‐Magnetotelluric Survey for Groundwater Investigation in the Al‐Jaww Plain in Eastern Abu Dhabi, Al‐Ain, United Arab Emirates

Saibi,

Ali,

Cherkose

et al. 2023

Earth and Space Science

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The United Arab Emirates (UAE), located in an arid climate zone with low rainfall, relies on shallow aquifers for freshwater. Understanding the depth and extent of such aquifers is crucial for meeting water supply needs. The UAE's hydrogeology is influenced by neighboring mountains in Oman. The Al‐Jaww Plain in southeast of Al‐Ain city is an essential groundwater source, characterized by a large, flat area of gravel and sand deposits from the Oman Mountains. This study aims to map groundwater aquifers in the Al‐Jaww Plain by integrating the audio‐magnetotelluric (AMT) method, seismic reflection profiling, and borehole data. AMT data were collected along an 11‐km ENE–WSW profile and a 2D resistivity model was generated. The resulting model delineates three distinct geo‐electrical zones from the surface to a depth of 5 km. First, a shallow layer with low resistivity (0–15 Ωm) represents the Quaternary and Pliocene aquifers, in addition to the Upper Cretaceous Simsima and Tertiary groundwater aquifer zone, extending to a depth of 1.5 km. Second, a moderately resistive layer (15–250 Ωm) is recorded beneath the first layer, corresponding to the Upper Cretaceous Aruma foreland basin sequence. Finally, a high‐resistivity region (>250 Ωm) at depths exceeding 3 km is attributed to the allochthonous Hawasina thrust sheet, which is associated with Late Cretaceous obduction of the Semail ophiolite. These findings have practical implications for managing groundwater resources in Al‐Ain.

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Two Dimensional Electrical Imaging of Quaternary Aquifer at Wadi Muraykhat and Wadi Sa’a, Al Ain Area, UAE

Cited by 3 publications

References 0 publications

2D Audio-magnetotelluric (Amt) Data Inversion of the Al-jaww Plain Area (Al-ain, United Arab Emirates) for Groundwater Investigations

2D Audio-magnetotelluric (Amt) Data Inversion of the Al-jaww Plain Area (Al-ain, United Arab Emirates) for Groundwater Investigations

A full‐range gradient survey for 2D electrical resistivity tomography

Audio‐Magnetotelluric Survey for Groundwater Investigation in the Al‐Jaww Plain in Eastern Abu Dhabi, Al‐Ain, United Arab Emirates

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