Watershed areas (Libya)

Awash river basin boundary is derived from the HydroBASINS product, which was obtained by delineating drainage basin boundaries from hydrologically corrected elevation data (WWF HydroSHEDS, Lehner et al. 2008; Lehner and Grill 2013) and supported by the topological concept of the Pfafstetter coding system (Verdin & Verdin 1999). Citations and acknowledgements of the HydroBASINS data should be made as follows: Lehner, B., Grill G. (2013): Global river hydrography and network routing: baseline data and new approaches to study the world’s large river systems. Hydrological Processes, 27(15): 2171–2186. Data is available at www.hydrosheds.org. **Data publication:** 2020-01-01 **Contact points:** Metadata Contact: [Solomon Seyoum](mailto:s.seyoum@un-ihe.org) Resource Contact: [WaPOR](mailto:wapor@fao.org) **Data lineage:** Source: The HydroBASINS product has been developed on behalf of World Wildlife Fund US (WWF), with support and in collaboration with the EU BioFresh project, Berlin, Germany; the International Union for Conservation of Nature (IUCN), Cambridge, UK; and McGill University, Montreal, Canada. Major funding for this project was provided to WWF by Sealed Air Corporation; additional funding was provided by BioFresh and McGill University. **Resource constraints:** HydroRIVERS data are covered by the same License Agreement as the HydroSHEDS database, which is available at https://www.hydrosheds.org/products/hydrorivers. HydroRIVERS data are free for non-commercial and commercial use. For all regulations regarding license grants, copyright, redistribution restrictions, required attributions, disclaimer of warranty, indemnification, liability, waiver of damages, and a precise definition of licensed materials, please refer to the License Agreement. By downloading and using the data the user agrees to the terms and conditions of the License Agreement. **Online resources:** HydroBASINS Version 1.0 HydroSHEDS License Agreement HydroBASINS Technical Documentation Version 1.c

Extent and names of the transboundary aquifers in Libya. **Data creation:** 2026-09-10 **Contact points:** Resource Contact: [Fabien Lezeau](mailto:fabien.lezeau@fao.org) **Data lineage:** GRAC and UNESCO-IHP (2025) Transboundary Aquifers of the World Map. Edition 2025. **Resource constraints:** The map and its attribute table are released under the Creative Commons Attribution-ShareAlike 3.0 Intergovernmental Organization license (CC BY-SA 3.0 IGO). **Online resources:** waterbaselinedata_aquifers

This dataset is the updated version of FAO's Hydrological Basins of the World dataset, published earlier in this catalog (https://data.apps.fao.org/catalog//iso/f2615a41-6383-4aa4-aa21-743330eb03ae) The dataset is included as part of Geo-Spatial Information collected and published in the framework of the AQUASTAT - programme of the Land and Water Division of the Food and Agriculture Organization of the United Nations. https://www.fao.org/aquastat/ **Data publication:** 2025-05-02 **Data revision:** 2026-04-13 **Citation:** Food and Agriculture Organization of the United Nations, FAO Land and Water Division. Major hydrological basins of the world, Hydrological sub-basins v2 (Global - 2026) - AQUASTAT, Latest update: 13/04/2026. Accessed (dd-mm/yy) from: https://data.apps.fao.org/catalog/dataset/8cc4c29c-491a-4715-b97f-6a6e8c5f125d **Contact points:** Resource Contact: [AQUASTAT](mailto:aquastat@fao.org) Metadata Contact: [AQUASTAT](mailto:aquastat@fao.org) **Data lineage:** This product incorporates data from the HydroSHEDS database (https://www.hydrosheds.org/) which is © World Wildlife Fund, Inc. (2006-2013) and has been used herein under license. WWF has not evaluated the data as altered and incorporated within the "Major hydrological basins of the world dataset", and therefore gives no warranty regarding its accuracy, completeness, currency or suitability for any particular purpose. Recent data review has resulted in the correction of minor topology errors. **Resource constraints:** This work is made available under the Creative Commons Attribution 4.0 International licence (CC-BY-4.0) **Online resources:** Download the data from Google Cloud Storage

This dataset divides the African continent in major hydrological basins and their sub-basins according to its hydrological characteristics. It was obtained by delineating drainage basin boundaries from hydrologically corrected elevation data (WWF HydroSHEDS and Hydro1K). The dataset consists of the following information:- numerical code and name of the major basin (MAJ_BAS and MAJ_NAME); - area of the major basin in square km (MAJ_AREA); - numerical code and name of the sub-basin (SUB_BAS and SUB_NAME); - area of the sub-basin in square km (SUB_AREA); - numerical code of the sub-basin towards which the sub-basin flows (TO_SUBBAS) (the codes -888 and -999 have been assigned respectively to internal sub-basins and to sub-basins draining into the sea) **Data publication:** 2021-12-15 **Supplemental Information:** This dataset is developed as part of a GIS-based information system on water resources for the African continent. It has been published in the framework of the AQUASTAT - programme of the Land and Water Division of the Food and Agriculture Organization of the United Nations. **Contact points:** Metadata Contact: [AQUASTAT](mailto:aquastat@fao.org) Resource Contact: [Jippe Hoogeveen](mailto:jippe.hoogeveen@fao.org) **Data lineage:** The linework of the map was obtained by delineating drainage basin boundaries from hydrologically corrected elevation data with a resolution of 15 arc-seconds.The elevation dataset was part of a mapping product, HydroSHEDS, developed by the Conservation Science Program of World Wildlife Fund. Original input data had been obtained during NASA's Shuttle Radar Topography Mission (SRTM). For general information regarding the HydroSHEDS data product: http://www.worldwildlife.org/hydrosheds For dataset download and technical information:http://hydrosheds.cr.usgs.gov https://data.apps.fao.org/catalog//iso/7707086d-af3c-41cc-8aa5-323d8609b2d1 **Online resources:** Download - Hydrological basins in Africa (ESRI shapefile) General information regarding the HydroSHEDS data product HydroSHEDS dataset download and technical information Rivers of Africa

SDG 6 Foundation Basin Units (SDG6-FBU). The SDG6-FBU is a geo-spatial data layer with spatial information derived from HydroBASIN level 12 (https://www.hydrosheds.org/products/hydrobasins). Each of these small hydrological units (approximately 1 million basins) is named according to the ‘SDG 6 Major Basin’ and ‘SDG 6 Sub-Basin’ classification, with the sub-basins nested within the major basins. **Data publication:** 2025-05-02 **Supplemental Information:** The dataset is included as part of Geo-Spatial Information collected and published in the framework of the AQUASTAT - programme of the Land and Water Division of the Food and Agriculture Organization of the United Nations. https://www.fao.org/aquastat/ **Citation:** Integrated Monitoring Initiative for SDG 6 (IMI-SDG 6), SDG6 Basin Maps, Foundation Basin Units, Latest update: 31/07/2024. Accessed (dd-mm/yy) from: https://data.apps.fao.org/catalog/iso/edit/864526d7-d135-471a-9f7e-d93abbffbe9d **Contact points:** Resource Contact: [Jippe Hoogeveen](mailto:jippe.hoogeveen@fao.org) Metadata Contact: [AQUASTAT](mailto:aquastat@fao.org) **Data lineage:** SDG 6 Foundation Basin Units (SDG6-FBU). The SDG6-FBU is a geo-spatial data layer with spatial information derived from HydroBASIN level 12 (https://www.hydrosheds.org/products/hydrobasins). Each of these small hydrological units (approximately 1 million basins) maintains attribute information from the following 4 source layers: • FAO (major basins and sub-basins) • TWAP (river basins component) • GRDC (river basins) • WMO (major basins and sub-basins), which allows for backward compatibility to be maintained to each source layer. In addition, each hydrological unit will be named according to the new ‘SDG 6 Major Basin’ and ‘SDG 6 Sub-Basin’ classification, with the sub-basins nested within the major basins. These new SDG 6 classifications will draw initially upon the source layers and then over time be revised based on country information. All improvements of the SDG 6 Basin Map will be conducted in this layer. This product "SDG 6 Foundation Basin Units (SDG6-FBU)" incorporates data from the HydroSHEDS database (https://www.hydrosheds.org/) which is © World Wildlife Fund, Inc. (2006-2013) and has been used herein under license. WWF has not evaluated the data and therefore gives no warranty regarding its accuracy, completeness, currency or suitability for any particular purpose. **Resource constraints:** This work is made available under the Creative Commons Attribution 4.0 International licence (CC-BY-4.0) **Online resources:** Download the data from Google Cloud Storage SDG6_BasinMaps_Final_Report_v1 SDG6_BasinMaps_Final_Report_v1_Appendices

SDG 6 Foundation Basin Units (SDG6-FBU). The SDG6-FBU is a geo-spatial data layer with spatial information derived from HydroBASIN level 12 (https://www.hydrosheds.org/products/hydrobasins). Each of these small hydrological units (approximately 1 million basins) is named according to the ‘SDG 6 Major Basin’ and ‘SDG 6 Sub-Basin’ classification, with the sub-basins nested within the major basins. **Data publication:** 2025-05-02 **Supplemental Information:** The dataset is included as part of Geo-Spatial Information collected and published in the framework of the AQUASTAT - programme of the Land and Water Division of the Food and Agriculture Organization of the United Nations. https://www.fao.org/aquastat/ **Citation:** Integrated Monitoring Initiative for SDG 6 (IMI-SDG 6), SDG6 Basin Maps, Foundation Basin Units, Latest update: 31/07/2024. Accessed (dd-mm/yy) from: https://data.apps.fao.org/catalog/iso/edit/edc5d019-e185-4104-8c13-3261c96e4c0a **Contact points:** Resource Contact: [Jippe Hoogeveen](mailto:jippe.hoogeveen@fao.org) Metadata Contact: [AQUASTAT](mailto:aquastat@fao.org) **Data lineage:** SDG 6 Foundation Basin Units (SDG6-FBU). The SDG6-FBU is a geo-spatial data layer with spatial information derived from HydroBASIN level 12 (https://www.hydrosheds.org/products/hydrobasins). Each of these small hydrological units (approximately 1 million basins) maintains attribute information from the following 4 source layers: • FAO (major basins and sub-basins) • TWAP (river basins component) • GRDC (river basins) • WMO (major basins and sub-basins), which allows for backward compatibility to be maintained to each source layer. In addition, each hydrological unit will be named according to the new ‘SDG 6 Major Basin’ and ‘SDG 6 Sub-Basin’ classification, with the sub-basins nested within the major basins. These new SDG 6 classifications will draw initially upon the source layers and then over time be revised based on country information. All improvements of the SDG 6 Basin Map will be conducted in this layer. This product "SDG 6 Foundation Basin Units (SDG6-FBU)" incorporates data from the HydroSHEDS database (https://www.hydrosheds.org/) which is © World Wildlife Fund, Inc. (2006-2013) and has been used herein under license. WWF has not evaluated the data and therefore gives no warranty regarding its accuracy, completeness, currency or suitability for any particular purpose. **Resource constraints:** This work is made available under the Creative Commons Attribution 4.0 International licence (CC-BY-4.0) **Online resources:** Download the data from Google Cloud Storage SDG6_BasinMaps_Final_Report_v1 SDG6_BasinMaps_Final_Report_v1_Appendices