Grand Erg Occidental


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Grand Erg Occidental

 

(Great Western Erg), a sandy desert in the northwestern Sahara of Algeria. The Grand Erg Occidental covers an area of approximately 80,000 sq km. The topography is characterized by polygonal ground and long corridors between short dunes, which are cut off by transverse sand necks. The dunes, up to 300 m high in the west, are held in place by grasses and brush. After rainfall the dense clays of the corridors (gassi) hold the water, and ephemeral plants appear. Groundwater is closest to the surface in the south, where there are many oases. Highways to the central Sahara run along the western and eastern edges of the erg.

References in periodicals archive ?
Malgr[euro]u[c] leurs moyens rudimentaires, ils ont su capter les eaux cach[euro]u[c]es au dessous du Grand Erg Occidental, issues dae1/4aoune nappe qui nae1/4aoa toujours pas [euro]u[c]t[euro]u[c] quantifi[euro]u[c]e.
As part of the Grand Erg Occidental, little is known about the history of the Gourara of the Algerian Sahara.
Perche sur les hauts sommets arides et escarpes, mais splendides, a la limite de demarcation entre le grand Erg Oriental et le grand Erg occidental, le vieux ksar d'El-Menea demeure une citadelle riche aussi bien par son histoire et ses traditions que par la beaute des paysages naturels.