Sand Dunes and Wadi, Algeria – December 23rd, 2008
This images gives us a detailed look at the desert sands of Algeria. In the lower portion, we can clearly see the red-orange dunes of the Sahara Desert.
These dunes are in the upper part of the Grand Erg Occidental (also known as the Western Sand Sea), the second largest erg in northern Algeria, after the Grand Erg Oriental.
This true desert region receives less than 25 cm (10 in) of rainfall per year. It contains no human villages and there are no roads through it.
From the top left to the center, we can see the Wadi Saour. A wadi, found primarily in North Africa and the Middle East, is a valley or ravine, bounded by relatively steep banks, which in the rainy season becomes a watercourse. As we can observe, some water has pooled in the wadi near the center of the image.
Contrary to the uninhabited Grand Erg Oriental, there are some towns near the Wadi Saour, such as Ougarta, Ouata and Kerzaz.