9d58196a-ec16-42e3-8212-41cff9c3937c SANBI The Metadata Manager +27 21 799 8738 Kirstenbosch Research Centre Cape Town Claremont 7735 South Africa bgishelp@sanbi.org.za 2018-11-27T10:20:06 SANS 1878 FGDC-STD-001-1998 Albers 2017 Groundwater SWSA 2017 This GIS layer shows the outlines of the Strategic Water Source Areas for groundwater (SWSA-gw) that have been delineated as part of a Water Research Commission (WRC) project (K5/2431). Groundwater Strategic Water Source Areas (SWSAs) are areas which combine areas with high groundwater availability as well as where this groundwater forms a nationally important resource. The sub-national Water Source Areas (WSAs) are not nationally strategic as defined in the report but were included to provide a complete coverage. Dataset citation: Le Maitre, D.C., Seyler, H., Holland, M., Smith-Adao, L.B., Nel, J.L., Maherry, A. and Witthüser. K 2018. Strategic Water Source Areas for groundwater (Vector data). One of the outputs of the Identification, Delineation and Importance of the Strategic Water Source Areas of South Africa, Lesotho and Swaziland for Surface Water and Groundwater, WRC Report No TT 754/1/18, Water Research Commission, Pretoria, South Africa. The Strategic Water Source Areas for groundwater (SWSA-gw) reflect areas that have high groundwater recharge and where the groundwater forms a nationally important resource. The areas are delineated for the purposes of research, and the outcomes are useful to national level planners and decision makers as an indication of the location of strategic groundwater sources and resources. Sub-national WSAs for groundwater were also identified. The framework for management of the SWSAs promotes various best-practice groundwater management measures, such as the delineation of wellfield capture zones, and the incorporation of these in spatial planning processes. It is recommended that DWS prioritizes the SWSA-gw, along with other criteria (areas of sole supply, presence of stressed resources), for various management measures allowed for in the NWA, but not yet implemented. Helen Seyler Delta-H Water Systems Modelling (Pty) Ltd Principal Hydrogeologist +27 82 043 8075 Cape Town Office, 15 Bournemouth Road Muizenberg Western Cape 7950 South Africa helen@delta-h.co.za Strategic Water Source Areas, Groundwater South Africa 50000 environment 2017-10-01 15.292968749999995 33.486328125 -35.17380831799959 -21.616579336740585 SANBI bgishelp@sanbi.org.za ZIP 1 http://bgismaps.sanbi.org/server/rest/services/BGIS_Projects WWW:LINK-1.0-http--link A list of services published are available at this URL. BGIS Map Services http://bgis.sanbi.org/SpatialDataset/Detail/661 WWW:LINK-1.0-http--related A list of spatial data-sets are available at this URL. BGIS Spatial Datasets The delineation of Strategic Water Source Areas for groundwater (SWSA-gw) was a manual task based on the overlap of five criteria relating to groundwater recharge, groundwater use, and groundwater control zones. A SWSA-gw can be defined as an area with high groundwater availability and where groundwater forms an important resource and is therefore delineated wherever criteria 1 or 2 overlap with criteria 3, 4 or 5. In addition, even if only criterion 5 is met, this area also is considered a SWSA-gw in order to include current and/or future groundwater sources to areas of national economic significance. The delineation took into account the underlying geology. The final boundaries were defined by the combination of these areas defined by the different criteria and digitized in where necessary. Available documentation: Le Maitre, D.C., Seyler, H., Holland, M., Smith-Adao, L., Nel, J.L., Maherry, A. and Witthüser. K. (2018) Identification, Delineation and Importance of the Strategic Water Source Areas of South Africa, Lesotho and Swaziland for Surface Water and Groundwater. Final Integrated Report on Project K5/2431, Water Research Commission, Pretoria. DWAF, 2006. Groundwater Resource Assessment II: Task 3aE Recharge. Version 2.0 Final Report. Department of Water Affairs and Forestry, Pretoria.