Coastal or Coastal Zone (Arabic ﺳﺎﺣل, sāḥil, semi-arid Sahara are savannahs of tropical and subtropical grasslands and shrubs on the border or lands.
The Sahel extends from the Atlantic Ocean in the west to the Red Sea in the east; The lane continues as a 3862 km long strip with a width of several hundred kilometers to a thousand kilometers and covers an area of 3,053,200 square kilometers.
Sahel; It is the name that defines the geography of the South of Africa's Sahara Belt, starting from Senegal, including Mauritania, Mali, Niger, Chad, Sudan and even partially Nigeria, Burkina Faso and Eritrea.