Lake Chad Basin Commission Basin (not all of which feeds Lake Chad) includes eight countries, which, in descending area of land, included are: Chad, Niger, the Central African Republic, Nigeria, Sudan, Algeria, and Libya. Cameroon, Niger, Nigeria and Chad (the four countries directly containing parts of Lake Chad and its wetlands) signed the Fort Lamy (today N'Djamena) Convention on May 22, 1964, which created the Lake Chad Basin Commission. The Central African Republic joined in 1996, and Libya joined in 2008. Sudan was admitted in July 2000, but has observer status because it has not ratified the founding convention. Algeria has not participated. The
Nigeria (), Niger (), Chad (), Cameroon (), and has a coastline of at least s. Nigeria lies between latitudes 4° and 14°N, and longitudes 2° and 15°E. The highest point in Nigeria is Chappal Waddi at . The main rivers are the Niger and the Benue, which converge and empty into the Niger Delta. This is one of the world's largest river deltas, and the location of a large area of Central African mangroves. Nigeria has a varied landscape. The far south is defined by its tropical rainforest climate, where annual rainfall is a year. In the southeast stands the