National Freshwater Ecosystem Priority Areas Map 2011 sub quaternary catchments

Thermal springs (Olivier and Jonker, 2013). A thermal springs xlsx file was obtained for the purpose of guiding wetland mapping for the National Biodiversity Assessment (NBA) 2018 project. These coordinates were converted to points.

Waterfalls Waterfalls were extracted from the DRDLR:NGI point data and supplemented by Heidi van Deventer from known waterfalls and those indicated by experts across the country.

The most recent dams register of DWS, dated to 2016

Oxbow lakes from the DRDLR:NGI data issued in May 2016 for the purpose of indicating floodplain wetlands. These oxbow lakes are in some instances indicative of the floodplain depressions, however some artificial systems were also mapped as Lakes by DRDLR:NGI. The polygon features called 'Lakes' were extracted and converted to points. The data was used by data capturers to guide them in the typing of hydrogeomorphic units, and can also be used when modelling HGM units. Please see Van Deventer et al. (2018) for more information.

Springs (DRDLR:NGI, 2006 and 2016). The springs data was extracted from the hydrological point shapefile data issued by the DRDLR-NGI in September 2015. Springs can indicate potential origins of seep wetlands or rivers, and were used by the data capturers to assess sources of wetlands. It also provides the location of inland aquatic features that were not assessed in the NBA 2018. Please see Van Deventer et al. (2018) for more information.

Peatlands mapped as having turned desiccated or have burnt

NBA 2018 Rivers assessment layer. This data set is part of the first version of the South African Inventory of Inland Aquatic Ecosystems (SAIIAE) 2018 released in July 2018. A second update of the SAIIAE 2018 was issued with the launch of the NBA 2018, and includes the condition, Ecosystem Threat Status (ETS) and Ecosystem Protection Level (EPL) information for the rivers. The river lines data set is associated with the National Wetland Map 5 (NWM5) issued with the SAIIAE version 1 and 2. Dr Lindie Smith-Adao generated this rivers data set by 2018/06/29.

Wastewater Treatment Works (WWTW) (CSIR, 2015).

The National Wetland Map version 5 (NWM5) shows the distribution of inland wetland ecosystem types across South Africa and includes estuaries and the extent of some rivers. A confidence map was compiled to identify areas where wetland extent and hydrogeomorphic (HGM) units (which contributed to defining the inland wetland ecosystem types together with the regional setting) attained at a higher level of certainty compared to other areas. Higher levels of certainty are associated [code 5 in field Confidence_nr] with areas that have been visited in-field by a wetland specialist(s) over multiple seasons and cycles of the wetland hydroperiod, and are therefore more accurately represented in the dataset. Codes 4 to 1 indicate lower levels of confidence that the extent and HGM unit are represented well. If the Estuaries are used, please cite Van Niekerk et al., 2019. Technical Report of the Estuarine Ecosystems for the NBA 2018. For queries on the National Wetland Map 5 and associated Confidence Map datasets please contact the Principal Investigator [HvDeventer@csir.co.za] and cc the Freshwater@sanbi.org.za. For contributions and queries regarding future revisions of the National Wetland Map please contact Freshwater@sanbi.org.za. Updates will be incorporated into the National Wetland Map 6 which is under way.