Hydrogeology of Senegal - Revision history

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References

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	Return to the index pages:		Return to the index pages:
	[[~~Overview of~~ Africa Groundwater Atlas \| Africa Groundwater Atlas]] >> [[Hydrogeology by country \| Hydrogeology by country]]		[[Africa Groundwater Atlas Home \| Africa Groundwater Atlas]] >> [[Hydrogeology by country \| Hydrogeology by country]]

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	[[Category:Hydrogeology by country\|s]]		[[Category:Hydrogeology by country\|s]]
	[[Category:Africa Groundwater Atlas]]		[[Category:Africa Groundwater Atlas]]

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References

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	Cowi-Polyconsult. 1998-2002. Etude hydrogéologique de la nappe profonde du Maastrichtien,Sénégal. Rapps. Cowi-Polyconsult, Rép. Sénég., Min. Hydrau.		Cowi-Polyconsult. 1998-2002. Etude hydrogéologique de la nappe profonde du Maastrichtien,Sénégal. Rapps. Cowi-Polyconsult, Rép. Sénég., Min. Hydrau.

			PS Eau. 2022. [https://www.pseau.org/outils/ouvrages/ps_eau_fiche_pays_senegal_2022.pdf Fiche Pays: Senegal]

	Roger J, Banton O, Barusseau JP, Castaigne P, Comte J-C, Duvail C, Nehlig P, Noël BJ, Serrano O and Travi Y. 2009. Notice explicative de la cartographie multi-couches à 1/50 000 et 1/20 000 de la zone d’activité du Cap-Vert. Ministère des Mines, de l’Industrie et des PME, Direction des Mines et de la Géologie, Dakar, 245 pages.		Roger J, Banton O, Barusseau JP, Castaigne P, Comte J-C, Duvail C, Nehlig P, Noël BJ, Serrano O and Travi Y. 2009. Notice explicative de la cartographie multi-couches à 1/50 000 et 1/20 000 de la zone d’activité du Cap-Vert. Ministère des Mines, de l’Industrie et des PME, Direction des Mines et de la Géologie, Dakar, 245 pages.

			USAID. 2021. [https://winrock.org/wp-content/uploads/2021/08/Senegal_Country_Profile-Final.pdf Senegal Water Resources Profile Overview]. Water Resources Profile Series.

	Wuilleumier A, Théveniaut H, Mall I et Ndiaye PM. 2010. Notice explicative de la carte hydrogéologique à 1/500 000 du Sénégal oriental, Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar.		Wuilleumier A, Théveniaut H, Mall I et Ndiaye PM. 2010. Notice explicative de la carte hydrogéologique à 1/500 000 du Sénégal oriental, Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar.

	~~===General references===~~

	~~PS Eau. 2022. [https://www.pseau.org/outils/ouvrages/ps_eau_fiche_pays_senegal_2022.pdf Fiche Pays: Senegal]~~

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Groundwater monitoring

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	===Groundwater monitoring===		===Groundwater monitoring===

			Groundwater monitoring and data management is done by the Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE) and the Société Nationale des Eaux du Sénégal (SONES).

	'''Groundwater levels'''		'''Groundwater levels'''

	~~Groundwater levels are monitored twice~~ a ~~year: before~~ and ~~after the rainy season~~. ~~This work is funded through the Ministry of Hydraulics and Sanitation~~.		DGPRE has a national groundwater level monitoring network. Monitoring frequency depends on the pressure on aquifers and on funding. Some boreholes are equipped with automatic data loggers.

	'''Groundwater quality'''		'''Groundwater quality'''
	Groundwater quality is measured twice per year, before and after the rainy season, funded by the Ministry of Hydraulics and Sanitation. This work is sometimes extended by NGOs, researchers or others who want to better understand water quality.

	~~These data~~ are ~~collected~~ and ~~stored by~~ the ~~Direction de la Gestion et de la Planification des Ressources en Eau~~ (~~DGPRE)~~ and the ~~Société Nationale des Eaux du Sénégal (SONES~~).		DGPRE also maintains a national groundwater quality monitoring network of c. 500 piezometers. It monitors groundwater pH, temperature, conductivity and total mineralisation (USAID 2021). Measurements are made monthly in Dakar; 4 times a year in littoral aquifers; and twice a year in the rest of the country (usually before and after the rainy season). DGPRE also carries out water quality studies in individual basins on a sporadic basis, sometimes with NGOs, researchers or others who want to better understand water quality.

	=== Transboundary aquifers===		=== Transboundary aquifers===

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Groundwater management

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	Key institutions involved in groundwater management are:		Key institutions involved in groundwater management are:

	:- '''Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE)''': ~~Groundwater~~ and surface water management in Senegal, including water policy~~, are the responsibility of the )~~. Permits are required for drilling and water abstraction.		:- '''Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE)''': responsible for groundwater and surface water management in Senegal, including water policy. Permits are required for drilling and water abstraction.

	:- '''SONES/SEN’EAU''': SONES is a public agency with responsibility for urban water supply, including groundwater monitoring (borehole yield, groundwater levels and quality) in public supply wellfields and the main aquifers supplying Dakar. In 2020 the private company SEN'EAU took over this responsibility.		:- '''SONES/SEN’EAU''': SONES is a public agency with responsibility for urban water supply, including groundwater monitoring (borehole yield, groundwater levels and quality) in public supply wellfields and the main aquifers supplying Dakar. In 2020 the private company SEN'EAU took over this responsibility.

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Groundwater management

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	=== Groundwater management===		=== Groundwater management===

	Groundwater and surface water management in Senegal, including water policy, are the responsibility of the ~~Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE~~). Permits are required for drilling and water abstraction.		Key institutions involved in groundwater management are:

			:- '''Direction de la Gestion et de la Planification des Ressources en Eau (DGPRE)''': Groundwater and surface water management in Senegal, including water policy, are the responsibility of the ). Permits are required for drilling and water abstraction.

			:- '''SONES/SEN’EAU''': SONES is a public agency with responsibility for urban water supply, including groundwater monitoring (borehole yield, groundwater levels and quality) in public supply wellfields and the main aquifers supplying Dakar. In 2020 the private company SEN'EAU took over this responsibility.

	Currently, there is no legislative protection for groundwater in vulnerable areas, and water disposal is not controlled.		Currently, there is no legislative protection for groundwater in vulnerable areas, and water disposal is not controlled.

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References

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	==References==		==References==

	Many of the references below, and others relating to the hydrogeology of Senegal, ~~can be seen in~~ the [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SN&placeboolean=AND&singlecountry=1 African Groundwater Literature Archive].		Many of the references below, and others relating to the hydrogeology of Senegal, are also available through the [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SN&placeboolean=AND&singlecountry=1 African Groundwater Literature Archive].

			===Geology references===

	~~===Key Geology References===~~
	Roger J, Noël BJ, Barusseau JP, Serrano O, Nehlig P and Duvail C. 2009. Notice explicative de la carte géologique du Sénégal à 1/500 000, feuilles nord-ouest, nord-est et sud-ouest. Ministère des Mines, de l’Industrie et des PME, Direction des Mines et de la Géologie, Dakar, 61 pages.		Roger J, Noël BJ, Barusseau JP, Serrano O, Nehlig P and Duvail C. 2009. Notice explicative de la carte géologique du Sénégal à 1/500 000, feuilles nord-ouest, nord-est et sud-ouest. Ministère des Mines, de l’Industrie et des PME, Direction des Mines et de la Géologie, Dakar, 61 pages.

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	Théveniaut H, Ndiaye PM, Buscail F, Couëffé R, Delor C, Fullgraf T and Goujou J-C. 2010. Notice explicative de la carte géologique du Sénégal oriental à 1/500 000. Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar		Théveniaut H, Ndiaye PM, Buscail F, Couëffé R, Delor C, Fullgraf T and Goujou J-C. 2010. Notice explicative de la carte géologique du Sénégal oriental à 1/500 000. Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar

	===~~Key~~ Hydrogeology ~~References~~===		===Hydrogeology references===

	Cowi-Polyconsult. 1998-2002. Etude hydrogéologique de la nappe profonde du Maastrichtien,Sénégal. Rapps. Cowi-Polyconsult, Rép. Sénég., Min. Hydrau.		Cowi-Polyconsult. 1998-2002. Etude hydrogéologique de la nappe profonde du Maastrichtien,Sénégal. Rapps. Cowi-Polyconsult, Rép. Sénég., Min. Hydrau.

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	Wuilleumier A, Théveniaut H, Mall I et Ndiaye PM. 2010. Notice explicative de la carte hydrogéologique à 1/500 000 du Sénégal oriental, Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar.		Wuilleumier A, Théveniaut H, Mall I et Ndiaye PM. 2010. Notice explicative de la carte hydrogéologique à 1/500 000 du Sénégal oriental, Ministère des Mines, de l’Industrie, de l’Agro-Industrie et des PME, Direction des Mines et de la Géologie, Dakar.

			===General references===

			PS Eau. 2022. [https://www.pseau.org/outils/ouvrages/ps_eau_fiche_pays_senegal_2022.pdf Fiche Pays: Senegal]


	Return to the index pages:		Return to the index pages:
	[[Overview of Africa Groundwater Atlas \| Africa Groundwater Atlas]] >> [[Hydrogeology by country \| Hydrogeology by country]] ~~>> Hydrogeology of Senegal~~		[[Overview of Africa Groundwater Atlas \| Africa Groundwater Atlas]] >> [[Hydrogeology by country \| Hydrogeology by country]]

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	[[Category:Hydrogeology by country\|s]]		[[Category:Hydrogeology by country\|s]]
	[[Category:Africa Groundwater Atlas]]		[[Category:Africa Groundwater Atlas]]

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	In the colonial period the economy was dominated by export of groundnuts and other agricultural products. After independence, commercial agriculture was run by government parastatal organisations. From the 1980s there have been moves to privatise and diversify the economy. Senegal’s manufacturing industry is better developed than that of other West African countries, with petrochemicals now playing a significant role in the economy, and Dakar an important international port. Current key exports include fish, chemicals, cotton, groundnuts and calcium phosphate. Tourism is of growing importance, in part due to Senegal’s diverse ecology and culture, its relatively high level of development in comparison with other West African countries, and its reputation as a fairly stable democracy within the region. Information technology based services are another key contributor to the economy.		In the colonial period the economy was dominated by export of groundnuts and other agricultural products. After independence, commercial agriculture was run by government parastatal organisations. From the 1980s there have been moves to privatise and diversify the economy. Senegal’s manufacturing industry is better developed than that of other West African countries, with petrochemicals now playing a significant role in the economy, and Dakar an important international port. Current key exports include fish, chemicals, cotton, groundnuts and calcium phosphate. Tourism is of growing importance, in part due to Senegal’s diverse ecology and culture, its relatively high level of development in comparison with other West African countries, and its reputation as a fairly stable democracy within the region. Information technology based services are another key contributor to the economy.

	Senegal has relatively abundant water resources averaged across the country, but there are strong regional and seasonal variations. The north of the country is semi-arid; the south humid-tropical. The largest surface water resource is the ~~shared~~ Senegal River, which forms the country’s northern boundary. Many smaller perennial rivers and some lakes are also important resources. Groundwater is relatively abundant and provides much of the country’s water supplies. Overabstraction of groundwater is a growing problem in some areas.		Senegal has relatively abundant water resources averaged across the country, but there are strong regional and seasonal variations. The north of the country is semi-arid; the south humid-tropical. The largest surface water resource is the transboundary Senegal River, which forms the country’s northern boundary. Many smaller perennial rivers and some lakes are also important resources. Groundwater is relatively abundant and provides much of the country’s water supplies. Overabstraction of groundwater is a growing problem in some areas.


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	==Geology==		==Geology==

	This section provides a summary of the geology of Senegal. More detail can be found in the references listed at the bottom of this page. Many of these references can be accessed through the [http://~~www~~.bgs.ac.uk/africagroundwateratlas/archive.cfm Africa Groundwater Literature Archive].		This section provides a summary of the geology of Senegal. More detail can be found in the references listed at the bottom of this page. Many of these references can be accessed through the [http://www2.bgs.ac.uk/africagroundwateratlas/archive.cfm Africa Groundwater Literature Archive].

	The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).		The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).
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	==Hydrogeology==		==Hydrogeology==

	This section provides a summary of the hydrogeology of the main aquifers in Senegal. More information is available in the references listed at the bottom of this page. Many of these references can be accessed through the [http://~~www~~.bgs.ac.uk/africagroundwateratlas/archive.cfm Africa Groundwater Literature Archive].		This section provides a summary of the hydrogeology of the main aquifers in Senegal. More information is available in the references listed at the bottom of this page. Many of these references can be accessed through the [http://www2.bgs.ac.uk/africagroundwateratlas/archive.cfm Africa Groundwater Literature Archive].

	The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).		The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).
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	==References==		==References==

	Many of the references below, and others relating to the hydrogeology of Senegal, can be seen in the [https://~~www~~.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SN&placeboolean=AND&singlecountry=1 African Groundwater Literature Archive].		Many of the references below, and others relating to the hydrogeology of Senegal, can be seen in the [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SN&placeboolean=AND&singlecountry=1 African Groundwater Literature Archive].

	===Key Geology References===		===Key Geology References===

Dbk: Removed protection from "Hydrogeology of Senegal"

2020-01-07T11:15:50Z

Removed protection from "Hydrogeology of Senegal"

← Older revision	Revision as of 12:15, 7 January 2020
(No difference)

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	'''Lire cette page en français: [[Hydrogéologie du Sénégal\| Hydrogéologie du Sénégal]]''' [[File: flag_of_france.png \| 50px]]		'''Lire cette page en français: [[Hydrogéologie du Sénégal\| Hydrogéologie du Sénégal]]''' [[File: flag_of_france.png \| 50px]]

			[[File:CC-BY-SA_logo_88x31.png \| frame \| This work is licensed under a [https://creativecommons.org/licenses/by-sa/3.0/ Creative Commons Attribution-ShareAlike 3.0 Unported License]]]

	The area of present-day Senegal has been inhabited since prehistoric times. Recorded history shows kingdoms in this area from the 7th century; and parts of Senegal lay within the ancient empires of Ghana and Jolof at times between the 8th and 16th centuries. Islam has been an important influence since the Almovarid era of the 11th century. Various European colonial powers competed for trade in the area from the 15th century, including Portugal, the Netherlands and Britain. From the 17th century France dominated the area as part of French West Africa. In 1960 Senegal gained independence, initially as part of the short-lived Mali Federation with French Sudan (later Mali) and then a few months later as independent Senegal. Between 1982 and 1989, Senegal federated with Gambia as Senegambia. There were sporadic episodes of unrest in the 1980s and 90s, but since 2000 the country has seen relative political and civil stability, although there has been a long-running, albeit relatively low key separatist conflict in the southern Casamance region.		The area of present-day Senegal has been inhabited since prehistoric times. Recorded history shows kingdoms in this area from the 7th century; and parts of Senegal lay within the ancient empires of Ghana and Jolof at times between the 8th and 16th centuries. Islam has been an important influence since the Almovarid era of the 11th century. Various European colonial powers competed for trade in the area from the 15th century, including Portugal, the Netherlands and Britain. From the 17th century France dominated the area as part of French West Africa. In 1960 Senegal gained independence, initially as part of the short-lived Mali Federation with French Sudan (later Mali) and then a few months later as independent Senegal. Between 1982 and 1989, Senegal federated with Gambia as Senegambia. There were sporadic episodes of unrest in the 1980s and 90s, but since 2000 the country has seen relative political and civil stability, although there has been a long-running, albeit relatively low key separatist conflict in the southern Casamance region.
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	The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).		The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).

	[[File:Senegal_Geology5.png \| center \| thumb\| 400px \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]].]]		[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Senegal geology and hydrogeology map'''].

			[[File:Senegal_Geology5.png \| center \| thumb\| 400px \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]]. [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html Download a GIS shapefile of the Senegal geology and hydrogeology map].]]

	{\| class = "wikitable"		{\| class = "wikitable"
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	The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).		The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).

	[[File:Senegal_Hydrogeology5.png \| center \| thumb\| 600px \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page]].		[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Senegal geology and hydrogeology map'''].

			[[File:Senegal_Hydrogeology5.png \| center \| thumb\| 600px \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page. [https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html Download a GIS shapefile of the Senegal geology and hydrogeology map].]].

	====Unconsolidated Superficial Aquifers====		====Unconsolidated Superficial Aquifers====

Beod at 17:48, 20 February 2019

2019-02-20T17:48:51Z

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	The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).		The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).

	[[File:Senegal_Geology5.png \| center \| thumb\| ~~500px~~ \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]].]]		[[File:Senegal_Geology5.png \| center \| thumb\| 400px \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]].]]

	{\| class = "wikitable"		{\| class = "wikitable"
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	The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).		The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).

	[[File:Senegal_Hydrogeology5.png \| center \| thumb\| ~~500px~~ \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page]].		[[File:Senegal_Hydrogeology5.png \| center \| thumb\| 600px \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page]].

	====Unconsolidated Superficial Aquifers====		====Unconsolidated Superficial Aquifers====

← Older revision		Revision as of 18:48, 20 February 2019
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	The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).		The geology map on this page shows a simplified overview of the geology at a national scale (see the [[Geology \| Geology resource page]] for more details).

	[[File:Senegal_Geology5.png \| center \| thumb\| ~~500px~~ \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]].]]		[[File:Senegal_Geology5.png \| center \| thumb\| 400px \| Geology of Senegal at 1:5 million scale. Based on map described by Persits et al. 2002/Furon and Lombard 1964. For more information on the map development and datasets see the [[Geology \| geology resource page]].]]

	{\| class = "wikitable"		{\| class = "wikitable"
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	The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).		The hydrogeology map on this page shows a simplified overview of the type and productivity of the main aquifers at a national scale (see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map resource page]] for more details).

	[[File:Senegal_Hydrogeology5.png \| center \| thumb\| ~~500px~~ \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page]].		[[File:Senegal_Hydrogeology5.png \| center \| thumb\| 600px \| Hydrogeology of Senegal at 1:5 million scale. For more information on how the map was developed see the [[Africa Groundwater Atlas Hydrogeology Maps \| Hydrogeology map]] resource page]].

	====Unconsolidated Superficial Aquifers====		====Unconsolidated Superficial Aquifers====