Ọdọ Mmiri Chad nke idei mmiri juputara na savanna bụ ala mmiri juru na savannas n'Africa. Ọ na-agụnye ala njikọ nke ide mmiri na-e Mega n'oge na nke na-adịgide adịgide na mpaghara ɔdɔ mmiri Chad na Central Africa, na-ekpuchikwa ndị nke Cameroon, Chad, Niger, na Nigeria .