It is a transitional ecoregion of semi-arid grasslands, savannas, steppes, and thorn shrublands lying between the wooded Sudanian Savanna to the south and the Sahara to the north. The topography of the Sahel is mainly flat; most of the region lies between 200 and 400 meters (660 and 1,310 ft) in elevation.
I'm not sure what kind of answer your looking for but here's a response:
The Sahel region is a dry grassland area that stretches from the Atlantic Ocean to the Red Sea. This area is a transition zone between the Sahara Desert in the north and the tropical savannas to the south. It is more heavily populated than the Sahara, and rainfall varies greatly from year to year. Some years, it never rains. This is known as a drought or dry period.
