The Tunisian Jurassic aquifer in the North African Sahara aquifer system: information derived from two-dimensional seismic reflection and well logs

Lasmar, R. Ben; Guellala, Rihab; Garrach, Mohamed; Mahroug, Ali; Naouali, B. Sarsar; Inoubli, Mohamed Hédi

doi:10.1007/s10040-017-1623-z

Cited by 5 publications

(1 citation statement)

References 21 publications

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“…The Upper Triassic and Lower Jurassic are made of gypsum and anhydrite. The Jurassic and Cretaceous formations (only along Nafusa Mountains) are of small hydrogeological importance either because they are absent (erosion) or because they are not really exploited [Ben Lasmar et al, 2017]. From bottom to top, the Miocene begins with a clay layer followed by a limestone formation (sometimes referred to as the Lower Miocene Aquifer), then a sandy limestone (Middle Miocene Aquifer).…”

Section: Hydrogeological Contextmentioning

confidence: 99%

Coastal aquifer recharge and groundwater–seawater exchanges using downscaled GRACE data: case study of the Djeffara plain (Libya–Tunisia)

Gonçalvès¹,

Séraphin²,

Chekireb³

et al. 2021

Comptes Rendus. Géoscience

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The Djeffara plain, extending over Tunisia and Libya (48,000 km 2 ), experiences unsustainable exploitation of groundwater, the severity of which needs to be determined. Here, we used data from Gravity Recovery and Climate Experiment (GRACE) and Global Land Data Assimilation System (GLDAS) to assess the groundwater storage variation (∆GWS) for the period 2002-2016. ∆GWS values, downscaled over a 0.5°× 0.5°grid using pumping wells spatial distribution and rates, were introduced in a discrete set of groundwater and salt budget equations to ascertain the recharge and the coastal fluxes. An average recharge of 4.3 ± 2.7 mm•yr −1 representing 2.2 ± 1.4% of the domain-averaged annual rainfall was obtained. A saline intrusion of 147.3 × 10 6 and 46.9 × 10 6 m 3 •yr −1 was calculated for the Tripoli (Libya) and Djerba (Tunisia) areas, respectively. The overall Submarine Groundwater Discharge (SGD) of freshwater along the 450 km long Djeffara coast represents about 339.6 × 10 6 m 3 •yr −1 for the 2002-2016 period.

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Section: Hydrogeological Contextmentioning

confidence: 99%