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Search Results for ""Namib Desert"":

Cunene River Crossing Namib Desert Between Angola and Namibia – May 3rd, 2011

16.5S 11.7E

May 3rd, 2011 Category: Deserts, Image of the day, Rivers

Namibia and Angola - April 15th, 2011

The Namib Desert is a desert in Namibia and southwest Angola. This image focuses on the northern part of the desert, stretching across the border between those two countries.

The border is marked by the Cunene River (Angolan spelling) or Kunene River (Namibian spelling), which flows from the Angola highlands south to the border with Namibia and then west along the border until it reaches the Atlantic Ocean. Some greenish sediments can be seen entering the ocean near its mouth.

Moving up the coast from the rivermouth, one comes to Baia dos Tigres, the largest island of Angola (despite its name, which means “Bay of Tigres”). Its area is 98 km².

Namib Desert, Etosha Pan and Okavango River, Namibia – March 16th, 2011

17.9S 19.7E

March 16th, 2011 Category: Deserts, Image of the day, Rivers, Salt Flats

Namibia - February 17th, 2011

The Namibian landscape consists generally of five geographical areas: the Central Plateau, the Namib Desert, the Great Escarpment, the Bushveld, and the Kalahari Desert.

Much of this image is occupied by the Namib Desert. The sandy portion of the desert is visible along the coast in the lower part of the image. In the full image, many high rows of orange sand dunes can be observed.

To the north is the Etosha pan, a large endorheic salt pan forming part of the Namib Desert in the north of Namibia. The pan is mostly dry but after a heavy rain it will acquire a thin layer of water.

At the top of the full image, the Okavango River can be seen, marking the border between Namibia and Angola. The city of Rundu, the capital of the Kavango Region in northern Namibia, can be seen on the banks of the river near the upper right corner.

Kuiseb River Separating Sandy Southern Namib from Rocky Northern Namib Desert – February 26th, 2011

23.5S 15.0E

February 26th, 2011 Category: Deserts, Image of the day, Rivers

Namibia - February 12th, 2011

The Namib Desert occupies an area of around 80,900 km² (31,200 square miles), stretching from the Usiab River (north) to the town of Lüderitz (south) and from the Atlantic Ocean (west) to the Namib Escarpment (east).

Southern Namib (between Lüderitz and the Kuiseb River) comprises a vast dune sea with some of the tallest and most spectactular dunes of the world, ranging in color from pink to vivid orange.

Moving north from Sossusvlei, the sand gradually gives way to a rocky desert that extends all the way from Sossusvlei to the Swakop River.

The dividing line between the southern and northern parts of the desert is clearly visible near the top of this image. There, the Kuiseb River appears as a green line separating the ridges of the orange sand dunes to the south (observable in great detail in the full image) from the flatter, rocky desert to the north.

Namib Desert, Etosha Pan and Okavango Delta in Namibia and Botswana

25.4S 18.3E

October 6th, 2010 Category: Deserts, Rivers, Salt Flats

Namibia - August 27th, 2010

The Namib Desert is visible as an orange, sandy area on the west coast of Namibia in this image of the southern part of the African continent. The desert actually extends further north than the sandy, orange area, but it is more difficult to identify as it is composed of tan bedrock that blends in with the rest of the terrain.

Moving northwards, the Etosha Pan,  a whitish salt pan in northern Namibia near the border with Angola, and the Okavango Delta, the inland terminus of the Okavango River, in Botswana, can be observed. Upon opening the full image, the southwestern coastline of South Africa can also be seen, appearing greener and more fertile than the terrain to the north.

Environmental Issues Affecting Orange River, South Africa

28.6S 16.4E

February 16th, 2013 Category: Climate Change, Rivers

South Africa – January 27th, 2013

Draining an area of just under 1million km2 or 77% of the land area of South Africa, the Orange River has its source in the Drakensberg mountains, but starts as the Senqu River in Lesotho. From here it flows westwards to the Atlantic Ocean. Here, it can be seen flowing more or less horizontally across the upper left quadrant of the image.

The headwaters are located at an altitude of 3300 m and consequently parts freeze in the winter months. After the town of Kimberly the river is joined by the Vaal river, its main tributary and from here it enters the arid region of the southern Kalahari and Namib desert. Dams along the river provide water for irrigation and hydropower, however because of the unpredictable flow and sand bar at the river mouth navigation is limited.

Given the length of the Orange River, combined with its range of altitude and climacteric zones, the basin covers a wide range of ecological systems, and can be regarded as being a linear oasis. Its bio-geographical isolation means that potential for re-colonisation from adjacent rivers and wetlands is very low. The river biota is therefore unusually susceptible to the permanent loss of species.

Its biomes contain a vast array of faunal and floral species variety with several endemic species. However, they also comprise areas facing environmental threats, such as the extinction of species and changes brought about by desertification. The economic utilisation of the Orange River’s water as well as the land use patterns in the basin strongly influences the environmental state of the river basin.

In this context four issues are of particular significance, namely the problem of soil erosion and wetland losses in Lesotho (the most severe problem), the impact of industrial and municipal effluent in the Vaal River system, agricultural pollution in the Vaal and Orange River and the environmental threats to the Orange River Estuary Ramsar site at the mouth (click here for more information).