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The headwaters of a river are the smaller streams that feed a river, and make up the river's source. [4] These streams may be small and flow rapidly down the sides of mountains . [ 5 ] All of the land uphill of a river that feeds it with water in this way is in that river's drainage basin or watershed. [ 4 ]
A stone near Crissolo, Italy, is inscribed, "Here is born the Po".. The United States Geological Survey (USGS) states that a river's "length may be considered to be the distance from the mouth to the most distant headwater source (irrespective of stream name), or from the mouth to the headwaters of the stream commonly known as the source stream".
Through much of the 19th century, the Tennessee River was considered to start at the mouth of Clinch River (at Kingston). An 1889 declaration by the Tennessee General Assembly designated Kingsport (on the Holston River ) as the start of the Tennessee, but the following year a federal law was enacted that finally fixed the start of the river at ...
"River", however, is a misnomer as the Colorado is dry or small stream most of the year, due to its flow being almost completely exhausted by upstream diversions. The river bed will occasionally contain water, though, due either to monsoon storms over the Gila River Basin, or more rarely due to a particularly heavy snowmelt in the Rocky Mountains.
The Cedar River is a 338-mile-long (544 km) [2] river in Minnesota and Iowa. It is a tributary of the Iowa River , which flows to the Mississippi River . The Cedar River takes its name from the red cedar ( Juniperus virginiana ) trees growing there, and was originally called the Red Cedar River by the Meskwaki . [ 3 ]
The Potomac River (/ p ə ˈ t oʊ m ə k / ⓘ) in the Mid-Atlantic region of the United States flows from the Potomac Highlands in West Virginia to Chesapeake Bay in Maryland. It is 405 miles (652 km) long, [4] with a drainage area of 14,700 square miles (38,000 km 2), [5] and is the fourth-largest river along the East Coast of the United States.
The Trinity River as viewed from Reunion Tower in Dallas in August 2015. The Trinity River is a 710-mile (1,140 km) [2] river, the longest with a watershed entirely within the U.S. state of Texas. It rises in extreme northern Texas, a few miles south of the Red River. The headwaters are separated by the high bluffs on the southern side of the ...
The Allegheny River (/ ˌ æ l ɪ ˈ ɡ eɪ n i / AL-ig-AY-nee) is a 325-mile-long (523 km) tributary of the Ohio River that is located in western Pennsylvania and New York in the United States.