Alps rivers such as the Danube have major tributaries flowing into them that originate in the Alps. The Rhône is second to the Nile as a freshwater source to the Mediterranean Sea; the river begins as glacial meltwater, flows into Lake Geneva, and from there to France where one of its uses is to cool nuclear power plants. The Rhine originates in a 30 square kilometre area in Switzerland and represents almost 60 percent of water exported from the country. Tributary valleys, some of which are complicated, channel water to the main valleys which can experience flooding during the snow melt
Straight River (Wisconsin) Straight River (Wisconsin) The Straight River is a tributary of the Apple River located entirely within Polk County, Wisconsin in the United States. The Straight River rises in wetlands west of Straight Lake in Straight Lake State Park. After exiting Straight Lake, the river flows generally southeastward toward Big Round Lake in the town of Georgetown. From Big Round, the Straight flows through Little and Big Blake lakes, before meeting Fox Creek, the outlet of Bone Lake. Below the confluence, Fox Creek flows southward for , roughly parallel to County Road I/H, before meeting the Apple River a few miles