The Tsauchab is an

ephemeral river A stream is a continuous body of surface water flowing within the bed and banks of a channel. Depending on its location or certain characteristics, a stream may be referred to by a variety of local or regional names. Long large streams ar ...

in the

Hardap Region Hardap is one of the fourteen regions of Namibia, its capital is Mariental. Hardap contains the municipality of Mariental, the towns Rehoboth and Aranos, and the self-governed villages Gibeon, Gochas, Kalkrand, Stampriet and Maltahöhe. It is ...

of central

Namibia Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and ea ...

. Its source is in the southern

Naukluft Mountains The Naukluft Mountains (Afrikaans and German: ''Naukluftberge'') are a mountain range in central Namibia. The southern part of the mountain range forms the easternmost part of the Namib-Naukluft National Park. The northern mountains are occupied ...

, from where it flows westwards through the

Namib-Naukluft National Park The Namib-Naukluft Park is a national park in western Namibia, situated between the coast of the Atlantic Ocean and the edge of the Great Escarpment. It encompasses part of the Namib Desert (considered the world's oldest desert), the Naukluft mo ...

into

Sossusvlei Sossusvlei (sometimes written Sossus Vlei) is a salt and clay pan surrounded by high red dunes, located in the southern part of the Namib Desert, in the Namib-Naukluft National Park of Namibia. The name "Sossusvlei" is often used in an exten ...

, an

endorheic basin An endorheic basin (; also spelled endoreic basin or endorreic basin) is a drainage basin that normally retains water and allows no outflow to other external bodies of water, such as rivers or oceans, but drainage converges instead into lakes ...

. The lower river has in the past had a slightly different courses and also formed two other basins, the

Deadvlei Deadvlei is a white clay pan located near the more famous salt pan of Sossusvlei, inside the Namib-Naukluft Park in Namibia. Also written DeadVlei or Dead Vlei, its name means "dead marsh" (from English ''dead'', and Afrikaans ''vlei'', a lake or ...

and the Hiddenvlei. The Tsauchab is approximately long, its

catchment area In human geography, a catchment area is the area from which a location, such as a city, service or institution, attracts a population that uses its services and economic opportunities. Catchment areas may be defined based on from where people are ...

(including its tributary, the Zebra River) is estimated to be between 4,000 and . Since it is in the

Namib Desert The Namib ( ; pt, Namibe) is a coastal desert in Southern Africa. The name is of Khoekhoegowab origin and means "vast place". According to the broadest definition, the Namib stretches for more than along the Atlantic coasts of Angola, Namib ...

, the Tsauchab carries water only during the rare times when rain falls in the

and runs off, since it cannot seep into the soil fast enough (see ''

flash flood A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing o ...

''). During these rains, the Tsauchab becomes a rapid-running, strong river within a matter of hours. As a result of the occasional rains, it has over the past two million years carved the Sesriem Canyon, a long and up to deep canyon in

sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

. Past the canyon, the Tsauchab flattens and grows broader, and is surrounded by a

riparian forest A riparian forest or riparian woodland is a forested or wooded area of land adjacent to a body of water such as a river, stream, pond, lake, marshland, estuary, canal, sink or reservoir. Etymology The term riparian comes from the Latin word '' ...

as it slopes towards the

salt pan. In the Sossusvlei area, the riparian forest consists of both the living trees including

Maerua crassifolia ''Maerua crassifolia'' is a species of plant in the Capparaceae family. It is native to Africa, tropical Arabia, and Israel, but is disappearing from Egypt. Foliage from this plant is used as fodder for animals, especially camels, during the dr ...

and the remaining skeletons of dead trees. Sossusvlei, Sesriem Canyon and the high sand dunes between the two are some of Namibia's major tourist attractions.

External links

Tsauchab River and Sossus Vlei Lakebed, Namibia
at the

NASA Earth Observatory NASA Earth Observatory is an online publishing outlet for NASA which was created in 1999. It is the principal source of satellite imagery and other scientific information pertaining to the climate and the Environment (biophysical), environment whi ...

website

References

{{reflist Rivers of Namibia Hardap Region Namib-Naukluft National Park