Desertification in the Sahel of Burkina Faso (15 km west of Dori), West Africa. Major soil erosion in this area. Photograph taken during the rainy season (June to Sept). Average annual rainfall 20-50 cm/yr. Average temperature 12 C (min), and 47 C (max). Wind is frequent with variable speeds: average 3 - 8 m/s in rainy season; 0 - 3 m/s in dry season.