Botswana Lesotho Namibia South Africa About Tutorial Glossary Document Centre Image Gallery Maps Google Earth
Search:
Home The River Basin People and the River Governance Meeting the Water Challenge
The River Basin  
 Introduction
Geography
 Basin Landscape
Geomorphology
 Relief
 Geology
 Soils
 Soils of the Orange-Senqu River Basin
 Mineral Reserves
 Vegetation/Landcover
 Basins of Southern Africa
 River Basin and IWRM
Climate and Weather
Hydrology
Water Quality
Ecology and Biodiversity
 References


Feedback

send a general website comment

report a specific problem with this page

Feedback
Geography:

Geomorphology

   

Geomorphology is the study of the origins of landscape as it is seen today and is considered to be the science dealing with the relief of the earth and the drivers that create this relief, such as geology and soils. It is a combination of geology, physics, chemistry, biology and history, resulting in the evolution of complex geographic and topographic environments (Anderson 2008).

Many drivers impact on the geomorphology of a river basin and this part of the Geography Chapter provides a brief overview of the key drivers.

Basin Geomorphology

Within this section, the Geomorphology of the Orange-Senqu is described in terms of :

  • Relief
  • Geology
  • Soils
  • Mineral Reserves

As can be seen from the map below (left), the Orange-Senqu River basin in corporates the three dominant geomorphological provinces of South Africa - the Highveldt, Middleveldt and Lowveldt. Futher west, portions of the Plateaut of South West Africa and the Kalahari Basin, in Namibia and Botswana.

The region is transected by a geomorphological feature known as the Great Escarpment, which extends from the western edge of the Namibia and Angola plateaux, right around South Africa and north to the Zambezi River in Zimbabwe. This feature varies in height, reaching its maximum in the Drakensberg Mountains of South Africa at approximately 3 299 m above sea level. This is illustrated in the map below (right). As can be seen from the map below, the Orange-Senqu River basin lies almost entirely within the Great Escarpment.

Geomorphological Provinces of southern Africa.
Source:After Bridges,1990
( click to enlarge )
The Great Escarpment of southern Africa.
Source:After Bridges,1990
( click to enlarge )

 

Interactive

Explore the sub-basins of the Orange-Senqu River


Tour video scenes along the Orange-Senqu River related to the River Basin


Investigate land cover and terrestrial ecoregions in the basin


Examine how the hydrologic cycle moves water through and around the earth


Explore the interactions of living organisms in aquatic environments


 
You are here: Home Page > The River Basin > Geography > Geomorphology