Rietvlei Dam | |
---|---|
Official name | Rietvlei Dam |
Country | South Africa |
Location | Pretoria, Gauteng |
Coordinates | 25°52′36″S28°15′57″E / 25.8767°S 28.2658°E |
Construction began | 1932 [1] |
Opening date | 1934 [1] [2] |
Owner(s) | City of Tshwane |
Dam and spillways | |
Type of dam | earth-fill |
Impounds | Rietvlei River [3] |
Height | 32 m [1] |
Length | 350 m |
Reservoir | |
Creates | Rietvlei Dam Reservoir |
Total capacity | 12 377 m3 [1] |
Catchment area | 0.4 km2 |
Surface area | 1.89 square kilometres (189 ha) [1] |
The Rietvlei dam is an earth-fill type dam and is one of a number of dams supplying water to the Pretoria region of South Africa. It supplies around 41 million liters of drinking water daily, [1] about 5.9% of the water requirement of Pretoria. [4] The dam mainly serves for municipal and industrial use. Its hazard potential has been ranked high (3).
Constructed as an earth-fill dam wall with a brick core in 1932/4, it was extended between 1988 and 1990 by raising the dam wall with the addition of a concrete wave wall and a reinforced earth barrier wall, as well as a surfaced roadway, on top of the original wall.
The dam is fed by the Rietvlei, a river of the Crocodile River (Limpopo) basin, as well as by five fountains and five boreholes.
The Rietvlei Nature Reserve occupies the area immediately surrounding the dam.
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Rietvlei Nature Reserve, located in southern Pretoria, is about 4,000 hectares (40 km2) in size, and includes the entirety of the Rietvlei Dam which impounds the Rietvlei River, in Gauteng, South Africa. The reserve is wedged between the R21 highway on the western side and the R50 (Delmas-Bapsfontein) road on the north-east. The mean elevation above sea level is approximately 1,525 meters, with the highest point at 1,542 m and the lowest at 1,473 m, the dam’s outflow in Sesmylspruit. The reserve covers a surface area of approximately 4,003 ha or 40 km2, of which the dam constitutes some 20ha. A network of roads criss-cross the entire area, which facilitates access to visitors and management.
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Voëlvlei Dam is a dam located in the Western Cape, South Africa near the town of Gouda. The earth-fill wall is 2,910 metres (9,550 ft) long and 10 metres (33 ft) high. The reservoir covers an area of 1,524 hectares and has a capacity of 168,000 megalitres, making it the second-largest reservoir in the Western Cape Water Supply System. Water from the reservoir is supplied to water treatment works of the City of Cape Town and the West Coast District Municipality, and can also be released into the Berg River for agricultural purposes or to fill the Misverstand Dam.
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