River – Otamiri River – Katsina Ala River – Niger River – Ngadda River – Otamiri River – Kaduna River – Kwa Ibo River N New Calabar River – Otamiri River – Otamiri River – Otamiri River – Katsina Ala River – Ngadda River – Escravos River F Forcados River G Gadar Tamburawa River – Bonny River C Calabar River – Oramiriukwa River – Ogunpa River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oramiriukwa River – Bonny River C Calabar River – Nun River O Ogun River – Kwa Ibo River N New Calabar River – Oshun River – Oramiriukwa River – Ngadda River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Gongola River – Kwa Ibo