The Orange River is a river in Southern Africa. It is the longest river in South Africa. With a total length of 2,432 km (1,511 mi), the Orange River Basin extends from Lesotho into South Africa and Namibia to the north. It rises in the Drakensberg mountains in Lesotho, flowing westwards through South Africa to the Atlantic Ocean. The river forms part of the international borders between South Africa and Lesotho and between South Africa and Namibia, as well as several provincial borders within South Africa. Except for Upington, it does not pass through any major cities. The Orange River plays an important role in the South African economy by providing water for irrigation and hydroelectric power. The river was named the Orange River in honour of the Dutch ruling family, the House of Orange, by the Dutch explorer Robert Jacob Gordon. Other names include simply the word for river, in Khoekhoegowab orthography written as !Garib, which is rendered in Afrikaans as Gariep River with the intrusion of a velar fricative in place of the alveolar click, Groote River or Senqu River, derived from ǂNū "Black". It is known in isiZulu as isAngqu.
The Vaal River is the largest tributary of the Orange River in South Africa. The river has its source near Breyten in Mpumalanga province, east of Johannesburg and about 30 kilometres (19 mi) north of Ermelo and only about 240 kilometres (150 mi) from the Indian Ocean. It then flows westwards to its confluence with the Orange River southwest of Kimberley in the Northern Cape. It is 1,458 kilometres (906 mi) long, and forms the border between Mpumalanga, Gauteng and North West Province on its north bank, and the Free State on its south.
KwaZulu-Natal is a province of South Africa that was created in 1994 when the government merged the Zulu bantustan of KwaZulu and Natal Province.
The Drakensberg is the eastern portion of the Great Escarpment, which encloses the central Southern African plateau. The Great Escarpment reaches its greatest elevation – 2,000 to 3,482 metres within the border region of South Africa and Lesotho.
The Tugela River is the largest river in KwaZulu-Natal Province, South Africa. With a total length of 560 km (350 mi), and a drop of 1 370 metres in the lower 480 km, it is one of the most important rivers of the country.
The Maloti-Drakensberg Park is a World Heritage Site, established on 11 June 2001 by linking the Sehlabathebe National Park in the Kingdom of Lesotho and the uKhahlamba Drakensberg Park in KwaZulu-Natal, South Africa. The highest peak is Thaba Ntlenyana rising to 3,482 metres.
The Vaal Dam in South Africa was constructed in 1938 and lies 77 km south of OR Tambo International Airport, Johannesburg. The lake behind the dam wall has a surface area of about 320 square kilometres (120 sq mi) and is 47 meters deep. The Vaal Dam lies on the Vaal River, which is one of South Africa's strongest-flowing rivers. Other rivers flowing into the dam are the Wilge River, Molspruit and Grootspruit. It has over 800 kilometres (500 mi) of shoreline and is South Africa's second biggest dam by area and the fourth largest by volume.
Harrismith is a large town in the Free State province of South Africa. It was named for Sir Harry Smith, a 19th-century British governor and high commissioner of the Cape Colony. It is situated by the Wilge River, alongside the N3 highway, about midway between Johannesburg, about 275 km to the north-west, and Durban to the southeast. The town is located at the junction of the N5 highway, which continues westward towards the provincial capital Bloemfontein, some 340 km to the south-west. This important crossroads in South Africa's land trade routes is surrounded by mesas and buttes. It is located at the base of one of these called Platberg.
The Highveld is the portion of the South African inland plateau which has an altitude above roughly 1,500 m (4,900 ft), but below 2,100 m (6,900 ft), thus excluding the Lesotho mountain regions to the south-east of the Highveld. It is home to some of the country's most important commercial farming areas, as well as its largest concentration of metropolitan centres, especially the Gauteng conurbation, which accommodates one-third of South Africa's population.
The Umgeni River or Mgeni River is a river in KwaZulu-Natal, South Africa. It rises in the "Dargle" in the KZN Midlands, and its mouth is at Durban, some distance north of Durban's natural harbour. It is generally agreed its name means "the river of entrance" in Zulu, though other meanings have been suggested.
Mont-aux-Sources is a mountain in Southern Africa, forming one of the highest portions of the Drakensberg Range. It is mostly within Lesotho, with parts in the KwaZulu-Natal and Free State provinces of South Africa.
The Sterkfontein Dam, located just outside the town of Harrismith, in the Free State, province of South Africa, is part of the Tugela-Vaal Water Project and the Drakensberg Pumped Storage Scheme, and located on the Nuwejaarspruit, a tributary of the Wilge River in the upper catchment area of the Vaal River. It is the second highest dam wall in South Africa and its highest earth fill dam.
The Ingula Pumped Storage Scheme is a pumped-storage power station in the escarpment of the Little Drakensberg range straddling the border of the KwaZulu-Natal and Free State provinces, South Africa. It is about 22 km (14 mi) North-East of Van Reenen.
The Kilburn Dam, an earth-fill type dam and part of the Tugela-Vaal Water Project and Drakensberg Pumped Storage Scheme, is located 500 metres (1,600 ft) lower than the Sterkfontein Dam, on the Mnjaneni River, near Bergville, KwaZulu-Natal, province of South Africa. The dam was commissioned in 1981, has a capacity of 36,700 cubic metres (1,300,000 cu ft), and a surface area of 207 hectares, the dam wall is 48 metres (157 ft) high. The main purpose of the dam assembly is to serve for the generation of hydro-electricity and its hazard potential has been ranked high (3).
Driekloof Dam is a small section of the Sterkfontein Dam, Free State, South Africa. A section of the Sterkfontein Dam reservoir is isolated after the construction of Driekloof Dam, this small reservoir has a capacity of 35.6 million cubic metres (28,900 acre⋅ft)., together with the Kilburn Dam almost 500 metres (1,600 ft) lower, Driekloof forms part of Eskom's Drakensberg Pumped Storage Scheme and Tugela-Vaal Water Project, and provides for up to 27.6 gigawatt-hours (99 TJ) of electricity storage in the form of 275 million cubic metres of water. The water is pumped to Driekloof during times of low national power consumption and released back into Kilburn through four 250 megawatts (340,000 hp) turbine generators in times of high electricity demand.
The Drakensberg Pumped Storage Scheme is an energy storage facility built in the South African provinces of Free State and KwaZulu-Natal starting in 1974 and completed by 1981.
Woodstock Dam is located on the upper reaches of the Tugela, KwaZulu-Natal province of South Africa and is the main source of water for the Thukela-Vaal Transfer Scheme. The dam was commissioned in 1982, has a storage capacity of 373.26 million cubic metres, and a surface area of 29.129 square kilometres (11.247 sq mi), the dam wall is 54 metres (177 ft) high. The dam serves mainly for municipal and industrial water supply purposes and its hazard potential has been ranked high (3).
The Wilge River is a tributary of the Vaal River in central South Africa. This river is important as part of the Tugela-Vaal Water Transfer Scheme where water is transferred from the Tugela River basin to the Vaal River basin.
