[ Modélisation hydrodynamique de la nappe alluviale de Rich (Haut Atlas central, Maroc) ]
Volume 14, Issue 3, February 2016, Pages 758–767
Youssef El Kayssi1, Mohamed Hilali2, and Ilias Kacimi3
1 Laboratoire d'Océanologie, Géodynamique et Génie Géologique, Faculté des Sciences Agdal-Rabat, Morocco
2 Department of Earth Sciences, Moulay Ismail University, Faculty of Science and Technology, Er-Rachidia, Morocco
3 Laboratoire d'Océanologie, Géodynamique et Génie Géologique, Faculté des Sciences Agdal-Rabat, Morocco
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The Rich aquifer is considered as the biggest alluvial aquifer of the high Ziz basin. However, it faces major natural and anthropogenic pressures include the aridity of the region and development of irrigated areas resulting in the rupture of the hydrodynamic balance sheet and accusing the sustainability of socio-economic fabric by the destocking groundwater reserves.
The piezometry of this aquifer shows that the water flow is converging towards the center at the confluence of the Ziz and Sidi Hamza rivers and in the southern part with some local changing of the flow direction between the observed piezometric states 1980 and 2012.
The development of a 3D finite difference mathematical model, in steady state for 1980, lets us to understand the spatial distribution of permeability, recharge and the hydrodynamic behavior of the aquifer.
This model that confirms the hydrogeological functioning of Rich aquifer system was used to calculate the terms of the water balance which is very balanced.
Author Keywords: Rich alluvial aquifer, hydrogeology, hydrodynamic modeling, steady state, water balance.
Volume 14, Issue 3, February 2016, Pages 758–767
Youssef El Kayssi1, Mohamed Hilali2, and Ilias Kacimi3
1 Laboratoire d'Océanologie, Géodynamique et Génie Géologique, Faculté des Sciences Agdal-Rabat, Morocco
2 Department of Earth Sciences, Moulay Ismail University, Faculty of Science and Technology, Er-Rachidia, Morocco
3 Laboratoire d'Océanologie, Géodynamique et Génie Géologique, Faculté des Sciences Agdal-Rabat, Morocco
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The Rich aquifer is considered as the biggest alluvial aquifer of the high Ziz basin. However, it faces major natural and anthropogenic pressures include the aridity of the region and development of irrigated areas resulting in the rupture of the hydrodynamic balance sheet and accusing the sustainability of socio-economic fabric by the destocking groundwater reserves.
The piezometry of this aquifer shows that the water flow is converging towards the center at the confluence of the Ziz and Sidi Hamza rivers and in the southern part with some local changing of the flow direction between the observed piezometric states 1980 and 2012.
The development of a 3D finite difference mathematical model, in steady state for 1980, lets us to understand the spatial distribution of permeability, recharge and the hydrodynamic behavior of the aquifer.
This model that confirms the hydrogeological functioning of Rich aquifer system was used to calculate the terms of the water balance which is very balanced.
Author Keywords: Rich alluvial aquifer, hydrogeology, hydrodynamic modeling, steady state, water balance.
Abstract: (french)
La nappe de Rich est considérée comme la plus importante nappe alluviale du haut bassin de Ziz. Néanmoins, elle est confrontée à des pressions naturelles et anthropiques majeures, notons l'aridité de la région et le développement des superficies irriguées entraînant la rupture de l'équilibre hydrodynamique de la nappe et accusant la durabilité du tissu socio-économique par le déstockage des réserves en eau souterraines disponibles.
La piézométrie de cette nappe montre que l'écoulement est convergent vers le centre de la nappe à la confluence des oueds Sidi Hamza et Ziz et vers le sud dans la partie méridionale avec des changements locaux du sens de l'écoulement observé entre les états piézométriques de 1980 et de 2012.
L'élaboration d'un modèle mathématique 3D aux différences finies, en régime permanent pour l'état de 1980, a permis d'appréhender de la distribution spatiale de la perméabilité et de la recharge. Ce modèle qui confirme le fonctionnement hydrogéologique du système aquifère de Rich a permis de calculer les différents termes du bilan hydrique qui s'avère très équilibré.
Author Keywords: Nappe alluviale de Rich, hydrogéologie, modélisation hydrodynamique, régime permanent, bilan hydrique.
How to Cite this Article
Youssef El Kayssi, Mohamed Hilali, and Ilias Kacimi, “Hydrodynamic modeling of the Rich alluvial aquifer (Central high atlas, Morocco),” International Journal of Innovation and Applied Studies, vol. 14, no. 3, pp. 758–767, February 2016.
