Congo River and Lake Chad

So that the waters of the Congo River fertilize the plains located to the North, I propose the following works:
Retention of the waters of the Congo River immediately above Kinshasa, by means of a 70 meters high dike, which would create an artificial lake of more than 300,000 square kilometres in length, raising the level of the waters to the city of Bangui.
Opening a gap through the Acrocoro de Asande.
Water distribution across the plains of the Sahel.
And, the proposal we make for Chad, consists of shaping and deepening the old Bahr el Gazal drain, so that the flood waters are definitely deposited in the Bodele Depression, rather than in Lake Chad.