Erg (landform) Erg (landform) An erg (also sand sea or dune sea, or sand sheet if it lacks dunes) 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". Strictly speaking, an erg is defined as a desert area that contains more than of aeolian or wind-blown sand and where sand covers more than 20% of the surface. Smaller areas are known as "dune fields". The largest hot desert in the world, the Sahara, covers and contains several ergs, such as
Erg Ferradj are generally well provided for. 100% of Erg Ferradj's population is connected to drinking water, 99% is connected to the sewerage system, and 99% (including 756 buildings) have access to electricity. There is no fuel service station in the town. Erg Ferradj has a total of 1,300 houses, of which 712 are occupied, giving an occupation rate of 6.2 inhabitants per occupied building. Erg Ferradj is reached by a local road from the N6 highway just west of Abadla. It is from Abadla and from Béchar. There is a total length of of roads in the commune. There are 3