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The Sahel region (/ s ə ˈ h ɛ l /; from Arabic ساحل (sāḥil) 'coast, shore'), or Sahelian acacia savanna, is a biogeographical region in Africa. It is the transition zone between the more humid Sudanian savannas to its south and the drier Sahara to the north.
The Sahel forms a belt up to 1,000 km wide, spanning Africa from the Atlantic Ocean to the Red Sea Main article: History of West Africa The Sahelian kingdoms were a series of centralized kingdoms or empires that were centered on the Sahel , the area of grasslands south of the Sahara , from the 8th century to the 19th.
[6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]
Contacts between Nubians and Arabs long predated the coming of Islam, [5] but the Arabization of the Nile Valley was a gradual process that occurred over a period of nearly one thousand years.
The CILSS was created in 1973 during the first great drought in the region with the aim of mobilizing the population in the Sahel and the international community to facilitate urgent need and the organization of works in various domains i.e. rainfed and irrigated agriculture, environment, transport, and communication.
Based on Senegal river cycles, precipitation cycles of various El Sahel stations which are related to Solar (89–120 years) Wolf-Gleissberg cycles, and on relations to Nile floods and Equatorial lake levels, Yousef and Ghilly in 2000 anticipated that there is a considerable probability that drought will occur El Sahel Zone in 2005±4 years.
A relatively dry tropical savanna, the Sahel extends beyond the borders of Burkina Faso, and borders the Sahara to its north and the fertile region of the Sudan to the South. Situated at a middle latitude is the Sudan-Sahel region, a transitional zone for rainfall and temperature levels. Further to the south, the Sudan-Guinea zone receives more ...
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