The Bas Saharan Basin () is an

artesian aquifer An artesian well is a well that brings groundwater to the surface without pumping because it is under pressure within a body of rock or sediment known as an aquifer. When trapped water in an aquifer is surrounded by layers of Permeability (ea ...

system which covers most of the

Algeria Algeria, officially the People's Democratic Republic of Algeria, is a country in the Maghreb region of North Africa. It is bordered to Algeria–Tunisia border, the northeast by Tunisia; to Algeria–Libya border, the east by Libya; to Alger ...

n and

Tunisia Tunisia, officially the Republic of Tunisia, is a country in the Maghreb region of North Africa. It is bordered by Algeria to the west and southwest, Libya to the southeast, and the Mediterranean Sea to the north and east. Tunisia also shares m ...

Sahara The Sahara (, ) is a desert spanning across North Africa. With an area of , it is the largest hot desert in the world and the list of deserts by area, third-largest desert overall, smaller only than the deserts of Antarctica and the northern Ar ...

and extends to

Libya Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to Egypt–Libya border, the east, Sudan to Libya–Sudan border, the southeast, Chad to Chad–L ...

, enclosing the whole of the

Grand Erg Oriental The Grand Erg Oriental (English: 'Great Eastern Sand Sea') is a large ''Erg (landform), erg'' or "field of sand dunes" in the Sahara Desert. Situated for the most part in Sahara Desert, Saharan lowlands of northeast Geography of Algeria, Algeria, t ...

References

Aquifers Aquifers of Africa Springs of Africa Sahara Springs of Algeria Springs of Morocco Springs of Libya Springs of Tunisia Springs of Western Sahara {{Africa-geo-stub