Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)

The method of electrical resistivity has proven very effective in the evaluation of groundwater. This specialized technique uses Dar-Zarrouk (D-Z) parameters in the estimation of longitudinal unit conductance, transverse unit resistance, and longitudinal resistivity to examine the groundwater level,...

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Autores principales:	Houyem Khorchani, Samir Kamel
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	dar-zarrouk parameters groundwater yield sandstone aquifer tataouine vertical electrical sounding Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/9ec565563de94a958cf22d6153370de8
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spelling	oai:doaj.org-article:9ec565563de94a958cf22d6153370de82021-11-05T17:08:45ZModeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)2709-80282709-803610.2166/aqua.2021.011https://doaj.org/article/9ec565563de94a958cf22d6153370de82021-06-01T00:00:00Zhttp://aqua.iwaponline.com/content/70/4/600https://doaj.org/toc/2709-8028https://doaj.org/toc/2709-8036The method of electrical resistivity has proven very effective in the evaluation of groundwater. This specialized technique uses Dar-Zarrouk (D-Z) parameters in the estimation of longitudinal unit conductance, transverse unit resistance, and longitudinal resistivity to examine the groundwater level, to distinguish the fresh, brackish, and saline water interface, and to assess the storage capacity of groundwater in the Triassic sandstone aquifer system in the Tataouine region (South-Eastern Tunisia). In this context, 23 vertical electrical soundings (VESs) were carried out in the Tataouine region using the Schlumberger configuration with a current electrode with a maximum spacing of the current electrodes (AB) of 500–600 m. The results indicate that the study area consists of three types of aquifers: (i) silt/clay saline water (<20 Ωm), (ii) a mixture of sand and clay freshwater (20–40 Ωm), and (iii) sand freshwater (40–200 Ωm). These sand freshwater aquifers are characterized by low longitudinal unit conductance (0–2.8 S), high values of transverse unit resistance (more than 9,000 Ωm2), and longitudinal resistivity (more than 35 Ωm) and are mainly concentrated in the north, south, and south-west regions of the study area. It should also be noted that the coefficient of anisotropy (λ) overlaps and does not clearly differentiate the characteristics of the aquifers of fresh, brackish, and saline water. An interpretation of VESs can also determine the storage capacity of groundwater by determining yield index values. Groundwater supply for the entire study area was classified as low yield, with a percentage of 13% and a maximum of 31% of the study area and 56% of moderate yield. Lastly, the real data from the drilling confirm all these results presented previously. The findings suggest that D-Z parameters are useful for making a distinction of various aquifer zones. HIGHLIGHTS The geophysical method by electrical prospecting was used in this study.; To evaluate the groundwater of the Triassic sandstone aquifer system in the Tataouine region (South-Eastern Tunisia).; To delimit fresh, brackish, and saline water.; To assess the storage capacity of groundwater in this aquifer level.;Houyem KhorchaniSamir KamelIWA Publishingarticledar-zarrouk parametersgroundwater yieldsandstone aquifertataouinevertical electrical soundingEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350ENAqua, Vol 70, Iss 4, Pp 600-618 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	dar-zarrouk parameters groundwater yield sandstone aquifer tataouine vertical electrical sounding Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350
spellingShingle	dar-zarrouk parameters groundwater yield sandstone aquifer tataouine vertical electrical sounding Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Houyem Khorchani Samir Kamel Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
description	The method of electrical resistivity has proven very effective in the evaluation of groundwater. This specialized technique uses Dar-Zarrouk (D-Z) parameters in the estimation of longitudinal unit conductance, transverse unit resistance, and longitudinal resistivity to examine the groundwater level, to distinguish the fresh, brackish, and saline water interface, and to assess the storage capacity of groundwater in the Triassic sandstone aquifer system in the Tataouine region (South-Eastern Tunisia). In this context, 23 vertical electrical soundings (VESs) were carried out in the Tataouine region using the Schlumberger configuration with a current electrode with a maximum spacing of the current electrodes (AB) of 500–600 m. The results indicate that the study area consists of three types of aquifers: (i) silt/clay saline water (<20 Ωm), (ii) a mixture of sand and clay freshwater (20–40 Ωm), and (iii) sand freshwater (40–200 Ωm). These sand freshwater aquifers are characterized by low longitudinal unit conductance (0–2.8 S), high values of transverse unit resistance (more than 9,000 Ωm2), and longitudinal resistivity (more than 35 Ωm) and are mainly concentrated in the north, south, and south-west regions of the study area. It should also be noted that the coefficient of anisotropy (λ) overlaps and does not clearly differentiate the characteristics of the aquifers of fresh, brackish, and saline water. An interpretation of VESs can also determine the storage capacity of groundwater by determining yield index values. Groundwater supply for the entire study area was classified as low yield, with a percentage of 13% and a maximum of 31% of the study area and 56% of moderate yield. Lastly, the real data from the drilling confirm all these results presented previously. The findings suggest that D-Z parameters are useful for making a distinction of various aquifer zones. HIGHLIGHTS The geophysical method by electrical prospecting was used in this study.; To evaluate the groundwater of the Triassic sandstone aquifer system in the Tataouine region (South-Eastern Tunisia).; To delimit fresh, brackish, and saline water.; To assess the storage capacity of groundwater in this aquifer level.;
format	article
author	Houyem Khorchani Samir Kamel
author_facet	Houyem Khorchani Samir Kamel
author_sort	Houyem Khorchani
title	Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
title_short	Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
title_full	Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
title_fullStr	Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
title_full_unstemmed	Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)
title_sort	modeling of groundwater yield by the electrical method case of the triassic sandstone aquifer (tataouine south-eastern tunisia)
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/9ec565563de94a958cf22d6153370de8
work_keys_str_mv	AT houyemkhorchani modelingofgroundwateryieldbytheelectricalmethodcaseofthetriassicsandstoneaquifertataouinesoutheasterntunisia AT samirkamel modelingofgroundwateryieldbytheelectricalmethodcaseofthetriassicsandstoneaquifertataouinesoutheasterntunisia
_version_	1718444116201701376

Modeling of groundwater yield by the electrical method case of the Triassic sandstone aquifer (Tataouine South-Eastern Tunisia)

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