Gariep Dam
| Gariep Dam | |||||||||
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| Coordinates | 30 ° 37 '22 " S , 25 ° 30' 23" O | ||||||||
| Data on the structure | |||||||||
| Construction time: | 1962-1971 | ||||||||
| Height of the barrier structure : | 88 m | ||||||||
| Building volume: | 1.73 million m³ of concrete | ||||||||
| Crown length: | 914 m | ||||||||
| Power plant output: | 360 MW | ||||||||
| Data on the reservoir | |||||||||
| Altitude (at congestion destination ) | 539.60 m | ||||||||
| Water surface | 374 km² | ||||||||
| Total storage space : | 5,670 million m³ | ||||||||
The Gariep Dam (German: "Gariep dam" or "Gariep reservoir") is the largest reservoir in South Africa . It is located on the Orange River near Norvalspont ( North Cape ), 150 km south of Bloemfontein , on both sides of the border between the Free State and Eastern Cape provinces . The subsurface of the reservoir is geologically determined by the deposits of the Beaufort group within the main Karoo basin .
history
The Orange River Development Project ( Orange River Development Project ) was approved by the South African government in 1963, the financing came mainly from foreign exchange income from gold exports. It comprised the construction of a double-curved arch dam with a crown length of 914 m, which dammed a reservoir with a capacity of 5.67 million m³, as well as the construction of the 83 km long Orange-Fish River Tunnel to supply water to part of the Eastern Cape Province , its inlet is located near the south bank of the reservoir. The damming of the lake began in September 1970. Six months after filling, when the lake had reached a water level of 40 m, several earthquakes occurred in the region.
The reservoir was originally named after its political sponsor Hendrik Verwoerd Dam . After the end of apartheid , it was officially renamed Gariep Dam on October 4, 1996 . Gariep is a word from the San language that means "great water".
function
The dam was built to protect the downstream regions from flooding , to generate electrical energy and to supply water. The first two turbines went online in 1971, the last two followed in 1976. A special feature of the machines is that they can be used in pure phase-shifting operation for reactive power compensation in the high-voltage network. The electricity generated at Gariep Dam is fed into the Eskom network near De Aar ( North Cape ), where there is a substation.
See also
Web links
Individual evidence
- ↑ BK Rastogi, HK Gupta: Dams and Earthquakes . Elsevier Science, October 22, 2013, ISBN 978-0-444-60055-4 , pp. 90–.