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
Huron River (Ohio) West Branch is long. It rises about south of Greenwich and four miles east of Shiloh, near the intersection of Gilger Road and Noble Road in northern Richland County's Blooming Grove Township. This is within a few miles of the headwaters of both the southwest branch of the Vermilion River (which also flows north to Lake Erie) and Shipp Creek, which is part of the Ohio River watershed via the Black Fork, Mohican, Walhonding, and Muskingum rivers. The West Branch of the Huron flows north and west from Blooming Grove Township through Huron County's Ripley Township, then back into Richland