Private exploitation of the North-Western Sahara Aquifer System

Amine Chekireb, Julio Goncalves (), Hubert Stahn and Agnes Tomini
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Amine Chekireb: CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement - IRD - Institut de Recherche pour le Développement - AMU - Aix Marseille Université - CdF (institution) - Collège de France - INSU - CNRS - Institut national des sciences de l'Univers - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, AMSE - Aix-Marseille Sciences Economiques - EHESS - École des hautes études en sciences sociales - AMU - Aix Marseille Université - ECM - École Centrale de Marseille - CNRS - Centre National de la Recherche Scientifique
Julio Goncalves: CEREGE - Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement - IRD - Institut de Recherche pour le Développement - AMU - Aix Marseille Université - CdF (institution) - Collège de France - INSU - CNRS - Institut national des sciences de l'Univers - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement

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Abstract: We formulate a hydro-economic model of the NorthWestern Sahara Aquifer System (NWSAS) to assess the effects of intensive pumping on the groundwater stock and examine the subsequent consequences of aquifer depletion. This large system comprises multi-layer reservoirs with vertical exchanges, all exploited under open access properties. We first develop a theoretical model to account for relevant features of the NWSAS by introducing, in the standard Gisser-Sanchez model, a non-stationary demand and quadratic stock-dependent cost functions. In the second step, we calibrate parameters values using data from the NWSAS over 1955-2000. We finally simulate the time evolution of the aquifer system with exploitation under an open-access regime. We specifically examine time trajectories of the piezometric levels in the two reservoirs, the natural outlets, and the modification of water balances. We find that natural outlets of the two reservoirs might be totally dried before 2050.

Keywords: hydro-economic model; private pumping; multi aquifer system; groundwater-dependant ecosystems; semi-arid region; simulation (search for similar items in EconPapers)
Date: 2021-11-29
New Economics Papers: this item is included in nep-ara and nep-env
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Related works:
Working Paper: Private Exploitation of the North-Western Sahara Aquifer System (2023)
Working Paper: Private exploitation of the North-Western Sahara Aquifer System (2021)
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