Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)

The coastal aquifer of Chtouka, with an area of 1250 km2, is located south of Agadir city in the Massa basin. The Chtouka aquifer is made up of a complex of heterogeneous formations mainly represented by alluvium and Plio-Quaternary lacustrine limestones which rest on the marls and sandy marls of th...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Benkou Soukaina, Larabi Abdelkader, Faouzi Mohamed, Ait Raoui Oussama
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	aquifère côtier de chtouka eaux souterraines hydrogéologie piézométrie rabattement bilan Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/7577c441eb254e2b909358ef3c8758c7
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7577c441eb254e2b909358ef3c8758c7
record_format	dspace
spelling	oai:doaj.org-article:7577c441eb254e2b909358ef3c8758c72021-11-08T15:19:09ZHydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)2267-124210.1051/e3sconf/202131405006https://doaj.org/article/7577c441eb254e2b909358ef3c8758c72021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/90/e3sconf_wmad2021_05006.pdfhttps://doaj.org/toc/2267-1242The coastal aquifer of Chtouka, with an area of 1250 km2, is located south of Agadir city in the Massa basin. The Chtouka aquifer is made up of a complex of heterogeneous formations mainly represented by alluvium and Plio-Quaternary lacustrine limestones which rest on the marls and sandy marls of the Miocene, which constitutes the substratum of this aquifer. The groundwater of the Chtouka aquifer is mainly used for agricultural and drinking water supply of Biougra, Ait Amira centers, and the rural communes of the plain. The average water withdrawals from the groundwater during the period of 2000-2015 are estimated at 85 Mm3/year, of which 90% corresponds to withdrawals by agricultural pumping. These withdrawals generated 58 Mm3/year which has led to a depletion of the groundwater reserves. The aquifer reservoir is mainly supplied by the infiltration of rainwater and partly by the irrigation water percolation by gravity which covers only 2% of the irrigation perimeter with a surface area of 17260 ha. The analysis of piezometric records, carried out for the series of years 1968-2020, showed a general decrease of groundwater level with drawdown values between 3 and 35 m. The sectors most affected by this decrease are located in the northern half where values reach 35 m in the northwest, 9 m in the north around Biougra Ait Amira, and around 14 m in the south. Further east, the recorded cumulative drawdown values oscillate around 8 m. These drawdowns are lower in the coastal zone to the west and hardly exceed 3 m. The obvious drop in the northern sectors of the study area is due to the reduction in groundwater recharge following the succession of dry years, but mainly due to the intensive exploitation of groundwater by agricultural pumping. In the northwest, the drop in the piezometric level is moderated by the impoundment of the modern irrigated perimeter of the Massa large hydraulics, served from the Youssef Ben Tachefine dam water reservoir. To improve our knowledge and our relevant understanding of this aquifer’s functioning, a hydrogeological study was carried out to identify and assess these water resources, in terms of updated piezometric and new balance. Indeed, the aquifer was greatly impacted by the last successive droughts which have hit the region since 2014. This updated assessment of these groundwater resources will contribute to better management of the Chtouka aquifer and will assist the manager in making the right decision regarding water resources planning.Benkou SoukainaLarabi AbdelkaderFaouzi MohamedAit Raoui OussamaEDP Sciencesarticleaquifère côtier de chtoukaeaux souterraineshydrogéologiepiézométrierabattementbilanEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 314, p 05006 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	aquifère côtier de chtouka eaux souterraines hydrogéologie piézométrie rabattement bilan Environmental sciences GE1-350
spellingShingle	aquifère côtier de chtouka eaux souterraines hydrogéologie piézométrie rabattement bilan Environmental sciences GE1-350 Benkou Soukaina Larabi Abdelkader Faouzi Mohamed Ait Raoui Oussama Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
description	The coastal aquifer of Chtouka, with an area of 1250 km2, is located south of Agadir city in the Massa basin. The Chtouka aquifer is made up of a complex of heterogeneous formations mainly represented by alluvium and Plio-Quaternary lacustrine limestones which rest on the marls and sandy marls of the Miocene, which constitutes the substratum of this aquifer. The groundwater of the Chtouka aquifer is mainly used for agricultural and drinking water supply of Biougra, Ait Amira centers, and the rural communes of the plain. The average water withdrawals from the groundwater during the period of 2000-2015 are estimated at 85 Mm3/year, of which 90% corresponds to withdrawals by agricultural pumping. These withdrawals generated 58 Mm3/year which has led to a depletion of the groundwater reserves. The aquifer reservoir is mainly supplied by the infiltration of rainwater and partly by the irrigation water percolation by gravity which covers only 2% of the irrigation perimeter with a surface area of 17260 ha. The analysis of piezometric records, carried out for the series of years 1968-2020, showed a general decrease of groundwater level with drawdown values between 3 and 35 m. The sectors most affected by this decrease are located in the northern half where values reach 35 m in the northwest, 9 m in the north around Biougra Ait Amira, and around 14 m in the south. Further east, the recorded cumulative drawdown values oscillate around 8 m. These drawdowns are lower in the coastal zone to the west and hardly exceed 3 m. The obvious drop in the northern sectors of the study area is due to the reduction in groundwater recharge following the succession of dry years, but mainly due to the intensive exploitation of groundwater by agricultural pumping. In the northwest, the drop in the piezometric level is moderated by the impoundment of the modern irrigated perimeter of the Massa large hydraulics, served from the Youssef Ben Tachefine dam water reservoir. To improve our knowledge and our relevant understanding of this aquifer’s functioning, a hydrogeological study was carried out to identify and assess these water resources, in terms of updated piezometric and new balance. Indeed, the aquifer was greatly impacted by the last successive droughts which have hit the region since 2014. This updated assessment of these groundwater resources will contribute to better management of the Chtouka aquifer and will assist the manager in making the right decision regarding water resources planning.
format	article
author	Benkou Soukaina Larabi Abdelkader Faouzi Mohamed Ait Raoui Oussama
author_facet	Benkou Soukaina Larabi Abdelkader Faouzi Mohamed Ait Raoui Oussama
author_sort	Benkou Soukaina
title	Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
title_short	Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
title_full	Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
title_fullStr	Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
title_full_unstemmed	Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)
title_sort	hydrogeological characterization and groundwater resources assessment of the chtouka coastal aquifer (south-west, morocco)
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/7577c441eb254e2b909358ef3c8758c7
work_keys_str_mv	AT benkousoukaina hydrogeologicalcharacterizationandgroundwaterresourcesassessmentofthechtoukacoastalaquifersouthwestmorocco AT larabiabdelkader hydrogeologicalcharacterizationandgroundwaterresourcesassessmentofthechtoukacoastalaquifersouthwestmorocco AT faouzimohamed hydrogeologicalcharacterizationandgroundwaterresourcesassessmentofthechtoukacoastalaquifersouthwestmorocco AT aitraouioussama hydrogeologicalcharacterizationandgroundwaterresourcesassessmentofthechtoukacoastalaquifersouthwestmorocco
_version_	1718441961607659520

Hydrogeological Characterization and Groundwater Resources Assessment of the Chtouka Coastal Aquifer (SOUTH-WEST, Morocco)

Ejemplares similares