Geography of South Africa - General Geography

General Geography

Like much of the African continent, South Africa features a landscape dominated by a high plateau in the interior, surrounded by a narrow strip of coastal lowlands. Unlike most of Africa, however, the perimeter of South Africa's inland plateau rises abruptly to form a series of mountain ranges before dropping to sea level. These mountains, known as the Great Escarpment, vary between 2,000 meters and 3,300 meters in elevation. The coastline is fairly regular and has few natural harbors. Each of the dominant land features—the inland plateau, the encircling mountain ranges, and the coastal lowlands—exhibits a wide range of variation in topography and in natural resources.

The interior plateau consists of a series of rolling grasslands (veld in Afrikaans), arising out of the Kalahari Desert in the north. The largest sub-region in the plateau is the 1,200-meter to 1,800-meter-high central area known as the Highveld. The Highveld stretches from Western Cape Province to the northeast, encompassing the entire Free State (formerly the Orange Free State). In the north it rises into a series of rock formations known as the Witwatersrand (literally, "Ridge of White Waters" in Afrikaans, commonly shortened to Rand). The Rand is a ridge of gold-bearing rock, roughly 100 kilometers by thirty-seven kilometers, that serves as a watershed for numerous rivers and streams. It is also the site of the world's largest proven gold deposits and the country's leading industrial city, Johannesburg.

North of the Witwatersrand is a dry savanna subregion, known as the Bushveld, characterized by open grasslands with scattered trees and bushes. Elevation varies between 600 meters and about 900 meters above sea level. The Bushveld, like the Rand, houses a virtual treasure chest of minerals, one of the largest and best known layered igneous (volcanic) mineral complexes in the world. Covering an area roughly 350 kilometers by 150 kilometers, the Bushveld has extensive deposits of platinum and chromium and significant reserves of copper, fluorspar, gold, nickel, and iron.

Along the northern edge of the Bushveld, the plains rise to a series of high plateaus and low mountain ranges, which form the southern edge of the Limpopo River Valley in Northern Province. These mountains include the Waterberg and the Strypoortberg ranges, and, in the far north, the Soutpansberg Mountains. The Soutpansberg range reaches an elevation of 1,700 meters before dropping off into the Limpopo River Valley and the border between South Africa and Zimbabwe. The Kruger National Park, which is known for its diverse terrain and wildlife, abuts most of the north-south border with Mozambique.

West of the Bushveld is the southern basin of the Kalahari Desert, which borders Namibia and Botswana at an elevation of 600 meters to 900 meters. Farther south, the Southern Namib Desert stretches south from Namibia along the Atlantic coastline. Between these two deserts lies the Cape Middleveld subregion, an arid expanse of undulating plains that sometimes reaches an elevation of 900 meters. The Cape Middleveld is also characterized by large depressions, or "pans," where rainfall collects, providing sustenance for a variety of plants and animals.

The southern border of the Highveld rises to form the Great Escarpment, the semicircle of mountain ranges roughly paralleling South Africa's coastline. The Drakensberg Mountains, the country's largest mountain range, dominate the southern and the eastern border of the Highveld from the Eastern Cape province to the border with Swaziland. The highest peaks of the Drakensberg Mountains in KwaZulu-Natal exceed 3,300 meters and are even higher in Lesotho, which is known as the "Mountain Kingdom."

The highest peaks in the nation not part of the Drakensberg Escarpment are located in the Karoo range in the southwestern part of the country. The two highest peaks in the Karoo are Compassberg and Seweweekspoortpiek, with summit elevations of 2,504 metres (8,215 ft) and 2,325 metres (7,628 ft) respectively.

In the west and the southwest, the Cape Ranges, the country's only "fold mountains"--formed by the folding of the continental crust—form an "L," where the north-south ranges meet several east-west ranges. The north-south Cape Ranges, paralleling the Atlantic coastline, include the Cedarberg Mountains, the Witsenberg Mountains, and the Great Winterhoek Mountains, and have peaks close to 2,000 meters high. The east-west ranges, paralleling the southern coastline, include the Swartberg Mountains and the Langeberg Mountains, with peaks exceeding 2,200 meters.

The Cape Ranges are separated from the Highveld by a narrow strip of semidesert, known as the Great Karoo (Karoo is a Khoisan term for "land of thirst"). Lying between 450 meters and 750 meters above sea level, the Great Karoo is crossed by several rivers that have carved canyons and valleys in their southward descent from the Highveld into the ocean. Another narrow strip of arid savanna lies south of the Great Karoo, between the Swartberg Mountains and the Langeberg Mountains. This high plain, known as the Little Karoo, has a more temperate climate and more diverse flora and fauna than the Great Karoo.

The narrow coastal strip between the Great Escarpment and the ocean, called the Lowveld, varies in width from about sixty kilometers to more than 200 kilometers. Beyond the coastline, the continental shelf is narrow in the west but widens along the south coast, where exploitable deposits of oil and natural gas have been found. The south coast is also an important spawning ground for many species of fish that eventually migrate to the Atlantic Ocean fishing zones.

The vast majority of South Africa's border consists of the ocean—or two oceans, which meet at the southwestern corner. Its territory includes Marion and Prince Edward Islands, nearly 2,000 km (1,243 mi) from Cape Town in the Atlantic Ocean.

The cold Benguela current sweeps up from the Antarctic along the Atlantic coast, laden with plankton and providing rich fishing-grounds. The east coast has the north-to-south Mozambique/Agulhas Current, which provides warm waters. These two currents have a major effect on the country's climate, the ready evaporation of the eastern seas providing generous rainfall while the Benguela current retains its moisture to cause desert conditions in the west.

Several small rivers run into the sea along the coastline, but none are navigable and none provide useful natural harbours. The coastline itself, being fairly smooth, provides only one good natural harbour, at Saldanha Bay north of Cape Town. A lack of fresh water prevented major development here. Nevertheless, busy harbours now exist at Cape Town, Port Elizabeth, East London, Durban, and Richards Bay.

On dry land, going from west to east, the country shares long borders with Namibia and Botswana, touches Zimbabwe, has a longitudinal strip of border with Mozambique to the east, and lastly curves in around Swaziland before rejoining Mozambique's southern border. In the interior, nestled in the curve of the bean-shaped Free State, lies the small mountainous country of Lesotho, completely surrounded by South African territory.

There are only two major rivers:

• the Limpopo (a stretch of which is shared with Zimbabwe)
• the Orange (with its tributary, the Vaal) which runs with a variable flow across the central landscape from east to west, emptying into the Atlantic Ocean at the Namibian border

In so dry a country, dams and irrigation are extremely important: the largest dam is the Gariep on the Orange River.

The total land area of South Africa is slightly more than 1,200,000 km2 (463,000 sq mi), and it measures some 1,600 km (994 mi) from north to south and approximately the same from east to west.