Gerald Tenywa http://www.sundayvision.co.ug/detail.php?mainNewsCategoryId=7&newsCategoryId=132&newsId=473712

ONCE upon a time the river systems in East Africa were linked to the Congo basin - thus rivers flowed from east to west. However, tectonic earth movements resulting in the eastern and western rift valley formation caused the reversal of the drainage system to collect in a shallow basin that became Lake Victoria, a source of fresh water, livelihood and marine life.