The Namibian section of the Okavango River is about 440 km in length and lies in the middle of the Okavango Basin, between Angola and Botswana. The first 400 km forms the common boundary with Angola, while the last 40 km cuts across the Caprivi Strip within Namibia, before entering Botswana. About 9,800 million m3 of water flows out of Namibia and into Botswana each year, with about 55% from the Cubango and 45% from the Cuito. The Cubango is the more seasonal, and is mainly responsible for flooding in the system. The water in both rivers is very clear and clean. The Namibian section of the Okavango River is about 440 km in length and lies in the middle of the Okavango Basin, between Angola and Botswana. The first 400 km forms the common boundary with Angola, while the last 40 km cuts across the Caprivi Strip within Namibia, before entering Botswana. About 9,800 million m3 of water flows out of Namibia and into Botswana each year, with about 55% from the Cubango and 45% from the Cuito. The Cubango is the more seasonal, and is mainly responsible for flooding in the system. The water in both rivers is very clear and clean.