Artificial water bodies of National Wetland Map III (NWM3). Mapping the locality and attributes of inland aquatics is essential across the country, which in turn can be used along with other data to identify key inland aquatic features for conservation

Van Deventer, H., Smith-Adao, L., Mbona, N., Petersen, C., Skowno, A., Collins, N.B., Grenfell, M., Job, N., Lötter, M., Ollis, D., Scherman, P., Sieben, E. & Snaddon, K. 2018. South African National Biodiversity Assessment 2018: Technical Report. Volume 2a: South African Inventory of Inland Aquatic Ecosystems (SAIIAE). Version 3, final released on 3 October 2019. Council for Scientific and Industrial Research (CSIR) and South African National Biodiversity Institute (SANBI): Pretoria, South Africa. Report Number: CSIR report number CSIR/NRE/ECOS/IR/2018/0001/A; SANBI report number

This layer is a static NWM1. The latest versions of the National Wetland Map can be viewed on the South African Inventory of Inland and Aquatic Ecosystems project page on BGIS

There are no access limitations for this item.

There are no use limitations for this item. The latest version of the National Wetland Map is available on the South African Inland Inventory of Aquatic Ecosystems project page on BGIS.

None

WGS 1984

Projection: Albers

False_Easting: 0.0

False_Northing: 0.0

Central_Meridian: 25.0

Standard_Parallel_1: -24.0

Standard_Parallel_2: -33.0

Latitude_Of_Origin: 0.0

Linear Unit: Meter (1.0)

The National Wetlands Map III (NWM3) is a combination of NWM2 extracted from the National Land Cover 2000 dataset and the Waterbodies of the 1:50 000 of topomaps from Chief Directorate Surveys and Mapping (CDSM). These two datasets were further categorized into natural waterbody, artificial waterbody and wetlands. For the artificial waterbodies layer, the following features were combined: DAM, Water Tank, etc.

DAM: A dam is an area feature depicting where water has collected on the upslope (upstream) side of a dam wall. Dams are shown on the map at their largest possible size. The line marking the edge of the dam is at the level of the spillway. (The spillway is where the water pours out when the dam is full.)

FISH FARM (aquaculture): A fish farm is an area of water reserved to breed fish artificially. This feature is usually found inland or along the coast

PURIFICATION PLANT: A purification plant purifies substances like water by passing it through a special process that rids it of harmful or foreign substances and/or matter.

SEWAGE WORKS: At the sewage works waste matter (effluent from residential and industrial areas) is removed from the water carried in the sewage pipes. Water circulates through large, round or square purification ponds. When the water is purified to the required standard, it is released into the nearest watercourse or recycled for consumption.

WATER TANK: Water tanks are storage containers for water; these tanks are usually storing water for human consumption. Water tanks provide for the storage of drinking water, irrigation agriculture, agricultural farming and livestock, and many other applications.

LARGE RESERVOIR: A large reservoir is a structure that stores water close to where it is needed. In rural areas, this may be near a homestead, stock pen or irrigated field. It is usually built from cement and is smaller than a dam. Larger reservoirs are sometimes built on top of hills close to towns. From these high points, water can flow down into the town's water supply system in the same way as it does from a water tower.

Although every effort was made to ensure the accuracy of the data, SANBI does not take responsibility for errors or problems that arise for using this dataset.

SANS 1878

FGDC-STD-001-1998