An eight-country commission to manage and develop the Zambezi river's water resources was launched on Tuesday in the town of Kasane, northern Botswana. The Zambezi Watercourse Commission, comprising Angola, Botswana, Malawi, Mozambique, Namibia, Tanzania, Zambia and Zimbabwe will manage one of the largest watercourse systems in the world, covering a basin area measuring over a million square kilometres with a total annual flow estimated at 40,750 million cubic metres.