Hydrogeology of Sierra Leone - Revision history

LaurenGiles: /* Hydrogeology */ SALGRID link removed

2024-01-23T10:03:12Z

Hydrogeology: SALGRID link removed

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	A comprehensive report on the Hydrogeology of Sierra Leone was published in 2017.		A comprehensive report on the Hydrogeology of Sierra Leone was published in 2017.

	Maps, data and more information on groundwater in Sierra Leone are also available through ~~[https://www.salgrid.org/# '''~~SALGRID~~''']~~ - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.		Maps, data and more information on groundwater in Sierra Leone are also available through SALGRID - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.

	Other sources with information on the hydrogeology of Sierra Leone are listed in the References section, below.		Other sources with information on the hydrogeology of Sierra Leone are listed in the References section, below.

LaurenGiles: /* References */ hydrgeology of sierra leone link removed

2024-01-23T10:00:44Z

References: hydrgeology of sierra leone link removed

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	CGS. 2004. Geological Map of Sierra Leone. Contact [https://www.nma.gov.sl/ National Minerals Agency] for details.		CGS. 2004. Geological Map of Sierra Leone. Contact [https://www.nma.gov.sl/ National Minerals Agency] for details.

	Fileccia A, Teatini P, Walther C and Mastrocola P. 2017. ~~[https://www.salgrid.org/final_report/Final_Report_20170822.pdf~~ Hydrogeology of Sierra Leone]. Ministry of Water Resources, Freetown, Sierra Leone.		Fileccia A, Teatini P, Walther C and Mastrocola P. 2017. Hydrogeology of Sierra Leone. Ministry of Water Resources, Freetown, Sierra Leone.

	Flinch JF, Huedo JL, Verzi H, Gonzalez H, Gerster R, Mansaray AK, Painuly LP, Rodriguez-Blanco L, Herra A, Brisson I and Gerard J. 2009. [https://www.searchanddiscovery.com/pdfz/documents/2009/10224flinch/ndx_flinch.pdf.html The Sierra Leone-Liberia Emerging Deepwater Province]. Adapted from oral presentation at AAPG Annual Convention, Denver, Colorado, June 7-10, 2009.		Flinch JF, Huedo JL, Verzi H, Gonzalez H, Gerster R, Mansaray AK, Painuly LP, Rodriguez-Blanco L, Herra A, Brisson I and Gerard J. 2009. [https://www.searchanddiscovery.com/pdfz/documents/2009/10224flinch/ndx_flinch.pdf.html The Sierra Leone-Liberia Emerging Deepwater Province]. Adapted from oral presentation at AAPG Annual Convention, Denver, Colorado, June 7-10, 2009.

LaurenGiles: /* Hydrogeology */ Hydrogeology of Sierra Leone link removed

2024-01-23T10:00:13Z

Hydrogeology: Hydrogeology of Sierra Leone link removed

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	[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].		[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].

	A comprehensive report on the ~~[https://www.salgrid.org/final_report/Final_Report_20170822.pdf '''~~Hydrogeology of Sierra Leone~~''']~~ was published in 2017.		A comprehensive report on the Hydrogeology of Sierra Leone was published in 2017.

	Maps, data and more information on groundwater in Sierra Leone are also available through [https://www.salgrid.org/# '''SALGRID'''] - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.		Maps, data and more information on groundwater in Sierra Leone are also available through [https://www.salgrid.org/# '''SALGRID'''] - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.

LaurenGiles: /* Surface water */ removed maps and monitoring data link

2024-01-23T09:57:31Z

Surface water: removed maps and monitoring data link

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	Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).		Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).

	The Salone Water Security website includes data on surface waters in Sierra Leone, including ~~[https://www.salonewatersecurity.com/#!~~maps~~/cfvg maps]~~ of river basins and some ~~[https://www.salonewatersecurity.com/#!surface-water/cvhv~~ monitoring data] on surface water flows and levels.		The Salone Water Security website includes data on surface waters in Sierra Leone, including maps of river basins and some monitoring data on surface water flows and levels.

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LaurenGiles: /* Surface water */ removed salone water security link

2024-01-23T09:56:53Z

Surface water: removed salone water security link

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	Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).		Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).

	The ~~[https://www.salonewatersecurity.com/~~ Salone Water Security] website includes data on surface waters in Sierra Leone, including [https://www.salonewatersecurity.com/#!maps/cfvg maps] of river basins and some [https://www.salonewatersecurity.com/#!surface-water/cvhv monitoring data] on surface water flows and levels.		The Salone Water Security website includes data on surface waters in Sierra Leone, including [https://www.salonewatersecurity.com/#!maps/cfvg maps] of river basins and some [https://www.salonewatersecurity.com/#!surface-water/cvhv monitoring data] on surface water flows and levels.

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Beod: /* Geology */

2022-10-21T13:32:12Z

Geology

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	Across the country, river valleys often contain infills of unconsolidated alluvial deposits, laid down by rivers. Along the coastal belt there are also extensive outcrops of coastal, marine and estuarine unconsolidated deposits.		Across the country, river valleys often contain infills of unconsolidated alluvial deposits, laid down by rivers. Along the coastal belt there are also extensive outcrops of coastal, marine and estuarine unconsolidated deposits.

	[[File:Sierra Leone_Geology3.png \| center \| thumb\| 500px \| Geology of Sierra Leone 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 Sierra Leone geology and hydrogeology map].]]		[[File:Sierra Leone_Geology3.png \| center \| thumb\| 500px \| Geology of Sierra Leone at 1:5 million scale. Based on maps developed [https://pubs.usgs.gov/of/1997/ofr-97-470/OF97-470A/ Persits et al., 2002] and [https://unesdoc.unesco.org/images/0009/000920/092086mo.pdf 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 Sierra Leone geology and hydrogeology map].]]

Beod: /* References */

2022-10-21T13:29:22Z

References

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

	<!-- PLEASE DO NOT DELETE BELOW THIS LINE -->		<!-- PLEASE DO NOT DELETE BELOW THIS LINE -->
	[[Category:Hydrogeology by country\|s]]		[[Category:Hydrogeology by country\|s]]
	[[Category:Africa Groundwater Atlas]]		[[Category:Africa Groundwater Atlas]]

Beod: /* Groundwater management */

2022-10-21T13:22:43Z

Groundwater management

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	Information on groundwater sources (water points) is collected in certain districts, but there is no central national database of groundwater sources. Borehole logs with geological information are not readily available.		Information on groundwater sources (water points) is collected in certain districts, but there is no central national database of groundwater sources. Borehole logs with geological information are not readily available.

	The [https://www.nwrma.gov.sl/ National Water Resources Management Agency] (NWRMA) was established in 2017 and started operations in ~~February~~ 2019. Its mandate is to protect, manage and regulate surface and groundwater resources in Sierra Leone. The Agency (NWRMA) is responsible for granting of water rights, water resources allotment among competing users, formulation of regulatory measures, information/data collection and sharing on water resources, with a view also to controlling pollution. ~~Trans-boundary~~ water resource issues also fall under the mandate of the Agency. The Hydrological Services Department within the NWRMA is responsible for collecting, processing and analysing hydrogeological and water quality ~~data among other environmental~~ data.		The [https://www.nwrma.gov.sl/ National Water Resources Management Agency] (NWRMA) was established in 2017 and started operations in 2019. Its mandate is to protect, manage and regulate surface and groundwater resources in Sierra Leone. The Agency (NWRMA) is responsible for granting of water rights, water resources allotment among competing users, formulation of regulatory measures, information/data collection and sharing on water resources, with a view also to controlling pollution. Transboundary water resource issues also fall under the mandate of the Agency.

			The [https://www.nwrma.gov.sl/hydrological-services-department/ Hydrological Services Department] within the NWRMA is responsible for collecting, processing and analysing hydrogeological and water quality data.

	Before the NWRMA was established, the Sierra Leone Water Security Project, funded by the UK Department for International Development (DFID), had the overall aim of establishing the foundations for water security in Sierra Leone. The [https://www.salonewatersecurity.com/ Salone Water Security project website] used to provide data from the project, but as of 2021 this website appears to be defunct. A detailed report on water monitoring produced by the project is available from the NWRMA website, as well as other reports and studies related to water resources monitoring and management ([https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf (Ministry of Water Resources, 2015)].		Before the NWRMA was established, the Sierra Leone Water Security Project, funded by the UK Department for International Development (DFID), had the overall aim of establishing the foundations for water security in Sierra Leone. The [https://www.salonewatersecurity.com/ Salone Water Security project website] used to provide data from the project, but as of 2021 this website appears to be defunct. A detailed report on water monitoring produced by the project is available from the NWRMA website, as well as other reports and studies related to water resources monitoring and management ([https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf (Ministry of Water Resources, 2015)].

Beod: /* Geology */

2022-09-29T09:03:27Z

Geology

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	A more detailed national geological map at 1:250,000 scale was compiled in 2004 by the Council for Geosciences for the Geological Survey of Sierra Leone (CGS 2004) - contact the [https://www.nma.gov.sl/ National Minerals Agency] for more information.		A more detailed national geological map at 1:250,000 scale was compiled in 2004 by the Council for Geosciences for the Geological Survey of Sierra Leone (CGS 2004) - contact the [https://www.nma.gov.sl/ National Minerals Agency] for more information.
	Further information may be available in the report [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=ViewDetails&id=AGLA060003 UN (1988)] ~~(see References section, below)~~.		Further information may be available in the report [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=ViewDetails&id=AGLA060003 UN (1988)].

	'''Summary'''		'''Summary'''

Beod at 09:02, 29 September 2022

2022-09-29T09:02:24Z

← Older revision		Revision as of 10:02, 29 September 2022
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	Please cite this page as: Upton, Ó Dochartaigh, Thomas and Bellwood-Howard, 2018.		Please cite this page as: Upton, Ó Dochartaigh, Thomas and Bellwood-Howard, 2018.

	Bibliographic reference: Upton K, Ó Dochartaigh BÉ, Thomas M and Bellwood-Howard, I. 2018. Africa Groundwater Atlas: Hydrogeology of Sierra Leone. British Geological Survey. Accessed [date you accessed the information]. ~~http~~://earthwise.bgs.ac.uk/index.php/Hydrogeology_of_Sierra_Leone		Bibliographic reference: Upton K, Ó Dochartaigh BÉ, Thomas M and Bellwood-Howard, I. 2018. Africa Groundwater Atlas: Hydrogeology of Sierra Leone. British Geological Survey. Accessed [date you accessed the information]. https://earthwise.bgs.ac.uk/index.php/Hydrogeology_of_Sierra_Leone

	==Terms and conditions==		==Terms and conditions==
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	\|}		\|}

	<nowiki>*</nowiki> Source: [~~http~~://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en FAO Aquastat]		<nowiki>*</nowiki> Source: [https://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en FAO Aquastat]


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	Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).		Five main rivers flow from northeast to southwest across Sierra Leone: the Little Scarcies, Rokel, Jong, Sewa and Moa rivers. Between them, they drain most of the land surface of the country. In addition, there are six smaller drainage basins: the Great Scarcies, Lokko, Rokel Estuary, Western, Robbi/Thauka and Sherbro Water Resources Areas. River runoff is highly seasonal, reflecting the seasonal distribution of rainfall. In the Rokel river, discharge increases from May, peaks in September and decreases to near-zero by March (Lapworth et al. 2015).

	The [~~http~~://www.salonewatersecurity.com/ Salone Water Security] website includes data on surface waters in Sierra Leone, including [~~http~~://www.salonewatersecurity.com/#!maps/cfvg maps] of river basins and some [~~http~~://www.salonewatersecurity.com/#!surface-water/cvhv monitoring data] on surface water flows and levels.		The [https://www.salonewatersecurity.com/ Salone Water Security] website includes data on surface waters in Sierra Leone, including [https://www.salonewatersecurity.com/#!maps/cfvg maps] of river basins and some [https://www.salonewatersecurity.com/#!surface-water/cvhv monitoring data] on surface water flows and levels.

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	\|}		\|}

	These statistics are sourced from [~~http~~://www.fao.org/nr/water/aquastat/main/index.stm FAO Aquastat]. They are the most recent available information in the Aquastat database. More information on the derivation and interpretation of these statistics can be seen on the FAO Aquastat website.		These statistics are sourced from [https://www.fao.org/nr/water/aquastat/main/index.stm FAO Aquastat]. They are the most recent available information in the Aquastat database. More information on the derivation and interpretation of these statistics can be seen on the FAO Aquastat website.

	Further water and related statistics can be accessed at the [~~http~~://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en Aquastat Main Database].		Further water and related statistics can be accessed at the [https://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en Aquastat Main Database].

	<sup>1</sup> More information on [~~http~~://www.fao.org/nr/water/aquastat/water_use_agr/index.stm irrigation water use and requirement statistics]		<sup>1</sup> More information on [https://www.fao.org/nr/water/aquastat/water_use_agr/index.stm irrigation water use and requirement statistics]

	==Geology==		==Geology==

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

	[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].		[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].

	~~More~~ information is available in the report [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=ViewDetails&id=AGLA060003 UN (1988)] (see References section, below).		A more detailed national geological map at 1:250,000 scale was compiled in 2004 by the Council for Geosciences for the Geological Survey of Sierra Leone (CGS 2004) - contact the [https://www.nma.gov.sl/ National Minerals Agency] for more information.
			Further information may be available in the report [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=ViewDetails&id=AGLA060003 UN (1988)] (see References section, below).

	'''Summary'''		'''Summary'''
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	Most of Sierra Leone is underlain by Precambrian cratonic rocks of the Archaean Basement Complex (Lapworth et al. 2015). A major belt of late Precambrian (Upper Proterozoic) to Lower Palaeozoic age metasedimentary rocks, with some (meta)volcanic rocks, occurs in the western part of the country (Camus and Cukor 2012, Lapworth et al. 2015). These are often capped by a weathered zone of unconsolidated material, where the Precambrian basement rocks have been weathered in-situ to sand, gravel and clay. They are also often capped by a layer of laterite or ferricrete.		Most of Sierra Leone is underlain by Precambrian cratonic rocks of the Archaean Basement Complex (Lapworth et al. 2015). A major belt of late Precambrian (Upper Proterozoic) to Lower Palaeozoic age metasedimentary rocks, with some (meta)volcanic rocks, occurs in the western part of the country (Camus and Cukor 2012, Lapworth et al. 2015). These are often capped by a weathered zone of unconsolidated material, where the Precambrian basement rocks have been weathered in-situ to sand, gravel and clay. They are also often capped by a layer of laterite or ferricrete.

	There are outcrops of intrusive igneous rocks across the country, which are generally of granitic composition(Camus and Cukor 2012, Lapworth et al. 2015).		There are outcrops of intrusive igneous rocks across the country, which are generally of granitic composition (Camus and Cukor 2012, Lapworth et al. 2015).

	Across the country, in river valleys ~~there are~~ often unconsolidated alluvial deposits laid down by rivers. Along the coastal belt are extensive outcrops of coastal, marine and estuarine unconsolidated deposits.		Across the country, river valleys often contain infills of unconsolidated alluvial deposits, laid down by rivers. Along the coastal belt there are also extensive outcrops of coastal, marine and estuarine unconsolidated deposits.

	[[File:Sierra Leone_Geology3.png \| center \| thumb\| 500px \| Geology of Sierra Leone 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 Sierra Leone geology and hydrogeology map].]]		[[File:Sierra Leone_Geology3.png \| center \| thumb\| 500px \| Geology of Sierra Leone 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 Sierra Leone geology and hydrogeology map].]]
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	[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].		[https://www.bgs.ac.uk/africagroundwateratlas/downloadGIS.html '''Download a GIS shapefile of the Sierra Leone geology and hydrogeology map'''].

	A comprehensive report on the [~~http~~://www.salgrid.org/final_report/Final_Report_20170822.pdf '''Hydrogeology of Sierra Leone'''] was published in 2017.		A comprehensive report on the [https://www.salgrid.org/final_report/Final_Report_20170822.pdf '''Hydrogeology of Sierra Leone'''] was published in 2017.

	Maps, data and more information on groundwater in Sierra Leone are also available through [~~http~~://www.salgrid.org/# '''SALGRID'''] - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.		Maps, data and more information on groundwater in Sierra Leone are also available through [https://www.salgrid.org/# '''SALGRID'''] - the Salone Groundwater Resources Database portal, the official data portal and repository of hydrogeological information of the Government of Sierra Leone.

	Other sources with information on the hydrogeology of Sierra Leone are listed in the References section, below.		Other sources with information on the hydrogeology of Sierra Leone are listed in the References section, below.
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	Information on groundwater sources (water points) is collected in certain districts, but there is no central national database of groundwater sources. Borehole logs with geological information are not readily available.		Information on groundwater sources (water points) is collected in certain districts, but there is no central national database of groundwater sources. Borehole logs with geological information are not readily available.

	The [~~http~~://www.nwrma.gov.sl/ National Water Resources Management Agency] (NWRMA) was established in 2017 and started operations in February 2019. Its mandate is to protect, manage and regulate surface and groundwater resources in Sierra Leone. The Agency (NWRMA) is responsible for granting of water rights, water resources allotment among competing users, formulation of regulatory measures, information/data collection and sharing on water resources, with a view also to controlling pollution. Trans-boundary water resource issues also fall under the mandate of the Agency. The Hydrological Services Department within the NWRMA is responsible for collecting, processing and analysing hydrogeological and water quality data among other environmental data.		The [https://www.nwrma.gov.sl/ National Water Resources Management Agency] (NWRMA) was established in 2017 and started operations in February 2019. Its mandate is to protect, manage and regulate surface and groundwater resources in Sierra Leone. The Agency (NWRMA) is responsible for granting of water rights, water resources allotment among competing users, formulation of regulatory measures, information/data collection and sharing on water resources, with a view also to controlling pollution. Trans-boundary water resource issues also fall under the mandate of the Agency. The Hydrological Services Department within the NWRMA is responsible for collecting, processing and analysing hydrogeological and water quality data among other environmental data.

	Before the NWRMA was established, the Sierra Leone Water Security Project, funded by the UK Department for International Development (DFID), had the overall aim of establishing the foundations for water security in Sierra Leone. The [~~http~~://www.salonewatersecurity.com/ Salone Water Security project website] used to provide data from the project, but as of 2021 this website appears to be defunct. A detailed report on water monitoring produced by the project is available from the NWRMA website, as well as other reports and studies related to water resources monitoring and management ([https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf (Ministry of Water Resources, 2015)].		Before the NWRMA was established, the Sierra Leone Water Security Project, funded by the UK Department for International Development (DFID), had the overall aim of establishing the foundations for water security in Sierra Leone. The [https://www.salonewatersecurity.com/ Salone Water Security project website] used to provide data from the project, but as of 2021 this website appears to be defunct. A detailed report on water monitoring produced by the project is available from the NWRMA website, as well as other reports and studies related to water resources monitoring and management ([https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf (Ministry of Water Resources, 2015)].

	During the Water Security Project, a groundwater monitoring network was installed to measure groundwater levels, from November 2012 onwards. Monitoring of this network was not continued after the end of the project, but the [~~http~~://www.nwrma.gov.sl/data/ground-water/ NWRMA] now provides groundwater level monitoring data collected during the project. Future groundwater level monitoring data may be available from here. The [~~http~~://www.nwrma.gov.sl/maps/ NWRMA] has a map showing a proposed national groundwater monitoring network, overlaid on a simplified geological map, which is also shown in [https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf Ministry of Water (2015)].		During the Water Security Project, a groundwater monitoring network was installed to measure groundwater levels, from November 2012 onwards. Monitoring of this network was not continued after the end of the project, but the [https://www.nwrma.gov.sl/data/ground-water/ NWRMA] now provides groundwater level monitoring data collected during the project. Future groundwater level monitoring data may be available from here. The [https://www.nwrma.gov.sl/maps/ NWRMA] has a map showing a proposed national groundwater monitoring network, overlaid on a simplified geological map, which is also shown in [https://fb615793-e8b4-4c13-9093-8c3cb093f037.filesusr.com/ugd/bf9204_360f6d6acbf449acade426c97844bc34.pdf Ministry of Water (2015)].


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	==References==		==References==

	The following ~~reports~~ provide more information on the geology and hydrogeology of Sierra Leone. Some of these, and many other documents, can be accessed through the [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SL&placeboolean=AND&singlecountry=1 Africa Groundwater Literature Archive]		The following provide more information on the geology and hydrogeology of Sierra Leone. Some of these, and many other documents, can be accessed through the [https://www2.bgs.ac.uk/africaGroundwaterAtlas/atlas.cfc?method=listResults&title_search=&author_search=&category_search=&country_search=SL&placeboolean=AND&singlecountry=1 Africa Groundwater Literature Archive]

	Camus Y and Cukor D. 2012. [https://www.poloresources.com/PDF/Nimini_Resource_Update_NI43-101.pdf NI 43-101 Technical Report on the Resource Update Nimini Gold Project, Kono Region, Sierra Leone]. SGS Canada Inc., submitted to Polo Resources Ltd.		Camus Y and Cukor D. 2012. [https://www.poloresources.com/PDF/Nimini_Resource_Update_NI43-101.pdf NI 43-101 Technical Report on the Resource Update Nimini Gold Project, Kono Region, Sierra Leone]. SGS Canada Inc., submitted to Polo Resources Ltd.

			CGS. 2004. Geological Map of Sierra Leone. Contact [https://www.nma.gov.sl/ National Minerals Agency] for details.

	Fileccia A, Teatini P, Walther C and Mastrocola P. 2017. [https://www.salgrid.org/final_report/Final_Report_20170822.pdf Hydrogeology of Sierra Leone]. Ministry of Water Resources, Freetown, Sierra Leone.		Fileccia A, Teatini P, Walther C and Mastrocola P. 2017. [https://www.salgrid.org/final_report/Final_Report_20170822.pdf Hydrogeology of Sierra Leone]. Ministry of Water Resources, Freetown, Sierra Leone.