Erg of Bilma
Encyclopedia
Erg (landform)
An erg is a broad, flat area of desert covered with wind-swept sand with little or no vegetative cover. The term takes its name from the Arabic word ʿarq , meaning "dune field"...
) in the Ténéré
Ténéré
The Ténéré is a desert region in the south central Sahara. It comprises a vast plain of sand stretching from northeastern Niger into western Chad, occupying an area of over...
desert region of the south central Sahara
Sahara
The Sahara is the world's second largest desert, after Antarctica. At over , it covers most of Northern Africa, making it almost as large as Europe or the United States. The Sahara stretches from the Red Sea, including parts of the Mediterranean coasts, to the outskirts of the Atlantic Ocean...
. The Erg of Bilma stretches from Fachi
Fachi
Fachi is an oasis surrounded by the Ténéré desert and the dunes of the Erg of Bilma in eastern Niger, placed on the western edge of the small Agram mountain outcropping. It has an estimated population of some 2000 people. A stopping point of the Agadez to Kaouar caravans of the Azalay, Fachi is 150...
, east of the Aïr Mountains
Aïr Mountains
The Aïr Mountains is a triangular massif, located in northern Niger, within the Sahara desert...
in north central Niger
Niger
Niger , officially named the Republic of Niger, is a landlocked country in Western Africa, named after the Niger River. It borders Nigeria and Benin to the south, Burkina Faso and Mali to the west, Algeria and Libya to the north and Chad to the east...
, east past the town of Bilma
Bilma
Bilma is an oasis town in north east Niger with a population of around 2,500 people. It lies protected from the desert dunes under the Kaouar Cliffs and is the largest town along the Kaouar escarpment...
, on to the Chadian
Chad
Chad , officially known as the Republic of Chad, is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest, and Niger to the west...
border. It surrounds on three sides the oasis of Bilma
Bilma
Bilma is an oasis town in north east Niger with a population of around 2,500 people. It lies protected from the desert dunes under the Kaouar Cliffs and is the largest town along the Kaouar escarpment...
, southernmost of a north south string of oasies of the Kaouar
Kaouar
The Kaouar, or Kaouar Cliffs is a north-south escarpment running some 150 km in north east Niger. Surrounded by the Ténéré desert and the dunes of the Erg of Bilma, easterly winds striking the 100 meter high escarpment of Kaouar provide easy access to groundwater for ten oases on the leeward side...
rise.
The ancient Bornu Empire
Bornu Empire
The Bornu Empire was an African state of Nigeria from 1396 to 1893. It was a continuation of the great Kanem Empire founded centuries earlier by the Sayfawa Dynasty...
to Fezzan
Fezzan
Fezzan is a south western region of modern Libya. It is largely desert but broken by mountains, uplands, and dry river valleys in the north, where oases enable ancient towns and villages to survive deep in the otherwise inhospitable Sahara.-Name:...
caravan routes had to cross the dunes of the erg south of Bilma as the last major obstacle before reaching the sahel
Sahel
The Sahel is the ecoclimatic and biogeographic zone of transition between the Sahara desert in the North and the Sudanian Savannas in the south.It stretches across the North African continent between the Atlantic Ocean and the Red Sea....
. While that traffic largely ceased after 1820, trade though the erg of Bilma continues from the Lake Chad
Lake Chad
Lake Chad is a historically large, shallow, endorheic lake in Africa, whose size has varied over the centuries. According to the Global Resource Information Database of the United Nations Environment Programme, it shrank as much as 95% from about 1963 to 1998; yet it also states that "the 2007 ...
region and the Termit Massif
Termit Massif
The Termit Massif is a mountainous region in southeastern Niger. Just to the south of the dunes of Tenere desert and the Erg of Bilma, the northern areas of the Termit, called the Gossololom consists of black volcanic peaks which jut from surrounding sand seas...
on a small scale.
External links
- Prof. Dr. R. Baumhauer at The University of Trier's Geography center has produced a number of papers on the Geography and Paleogeography of the Erg of Bilma.
- Surviving the Sahara : National Geographic, December 2002.