The lake now drains out through a former tributary valley and carries the upper Nile. Different colors denote different watersheds. Boundaries are in red and the horizontal black line is the equator. See the map below for a detailed view. A detailed map of Lake Kioga.
Lakes are in blue and marshes in green.
The Nile is in purple with red arrows showing flow directions. To the west is a steep and short drop to the Russian River, but the former valley there was dammed about a million years ago by lava flows. The valley flooded and found an outlet to the east, where more volcanic rocks slow deepening and erosion of the outlet.