Sahel Corridor

South of the Draa valley, a broad expanse of stony desert stretches towards Tindouf. The Hamada of the Draa forms a rocky plateau, its hard surface interrupted by dry channels and steep edges. In this part of the western Sahara, the long river valley to the north contrasts with the bare uplands to the south. Rainfall is sparse, and vegetation gathers chiefly where the ground can retain moisture.