The Highveld is the portion of the South African inland plateau which has an altitude above roughly 1500 m, but below 2100 m, 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 Gautengconurbation, which accommodates one-third of South Africa's population.
Location and description
The Highveld constitutes almost the whole of the Free State, and Gauteng Provinces, and portions of the surrounding areas: the western rim of Lesotho, and portions of the Eastern Cape, Northern Cape, North West, Limpopo, and MpumalangaProvinces of South Africa. The highest part of the Highveld, around 2100 m, is its northeastern well-defined boundary, where the plateau escarpment separates it from the Mpumalanga Lowveld,.Another well defined boundary is to its north where the Magaliesberg separates the Highveld from the Bushveld. The continuation of the Great Escarpment to the south separates the Highveld from KwaZulu-Natal. The south-eastern portion of the Great Escarpment rises to over 3000 m and forms the boundary between KwaZulu-Natal and Lesotho. The latter mountainous region is, however, not generally referred to as Highveld, whose boundary at this point runs just inside the Lesotho-Free State border, about 2000 m. From its eastern boundary, the Highveld slopes gently downwards to be bounded by the Great Karoo to the south, the Kalahari desert to the west, the Bushveld to the north, the Mpumalanga Lowveld to the northeast, KwaZulu-Natal to the east, and the Lesotho Highlands, or Mountains, to the southeast. The Highveld covers an area of almost 400,000 km2, or roughly 30% of South Africa's land area. The Highveld terrain is generally devoid of mountains, consisting of rolling plains, especially in the Free State, sometimes interrupted by rocky ridges such as the Witwatersrand, the Magaliesberg, and Vredefort Dome. The Vaal River and its tributaries form the main water drainage system of the Highveld. Tributaries of the Orange River drain the most southerly regions of the Highveld. The Highveld rainy season occurs in summer, with substantial afternoon thunderstorms being typical occurrences in November, December, and January. Frost occurs in winter.
Naturally occurring vegetation in the Highveld consists of different types of well-established grassland depending on the varying amounts of rainfall across the area: subtropical and temperate grassland, with true savannah not dominating the ecosystem until more tropical latitudes. The major grass species are Hyparrhenia hirta and Sporobolus pyramidalis and among these are other grasses and herbs. Trees and shrubs never thrived due to the frequent fires that occurred in the dry season and the heavy grazing.
