Rapids are sections of a river where the river bed has a relatively steep gradient, causing an increase in water velocity and turbulence. Flow, gradient, constriction, and obstacles are four factors that are needed for a rapid to be created.
Webb is the northernmost town in Herkimer County, New York, United States. As of the 2010 census it had a population of 1,807.
Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and white.
The Snoqualmie River is a 45-mile (72 km) long river in King County and Snohomish County in the U.S. state of Washington. The river's three main tributaries are the North, Middle, and South Forks, which drain the west side of the Cascade Mountains near the town of North Bend and join near the town of Snoqualmie just above the Snoqualmie Falls. After the falls the river flows north through rich farmland and the towns of Fall City, Carnation, and Duvall before meeting the Skykomish River to form the Snohomish River near Monroe. The Snohomish River empties into Puget Sound at Everett. Other tributaries of the Snoqualmie River include the Taylor River and the Pratt River, both of which enter the Middle Fork, the Tolt River, which joins at Carnation, and the Raging River at Fall City.
The Youghiogheny River, or the Yough for short, is a 134-mile-long (216 km) tributary of the Monongahela River in the U.S. states of West Virginia, Maryland, and Pennsylvania. It drains an area on the west side of the Allegheny Mountains northward into Pennsylvania, providing a small watershed in extreme western Maryland into the tributaries of the Mississippi River. Youghiogheny is a Lenape word meaning "a stream flowing in a contrary direction".
The Cheat River is a 78.3-mile-long (126.0 km) tributary of the Monongahela River in eastern West Virginia and southwestern Pennsylvania in the United States. Via the Ohio River, the Cheat and Monongahela are part of the Mississippi River watershed. Owing to the ruggedness of the surrounding Allegheny Mountains, the Cheat remains largely remote with few settlements or developments along its banks. Its headwaters are in the Cheat-Potomac Ranger District of the Monongahela National Forest.
The Black River is a 125-mile-long (201 km) blackwater river that empties into the eastern end of Lake Ontario on the shore of Jefferson County, New York in the United States. The origin of the name is not clear, but it may stem from the natural tannic acid that darkens the water in places. The river flows in a generally northwest direction, with its valley dividing the Adirondack Mountains on the east from the Tug Hill region to the west.
The Payette River is an 82.7-mile-long (133.1 km) river in southwestern Idaho and is a major tributary of the Snake River.
The Nantahala River is a river in western North Carolina in the United States, within the Nantahala National Forest, and near the Great Smoky Mountains National Park. Two-lane U.S. Highway 19/74 runs along the river, picnic areas dotting the route. In 1839, this was an unimproved large path, part of what became known as the Trail of Tears as the Cherokee people were forcibly removed from their homelands in this region to west of the Mississippi River and Indian Territory.
Saranac River is an 81-mile-long (130 km) river in the U.S. state of New York.
The Savage River is a 29.5-mile-long (47.5 km) river in Garrett County, Maryland, and is the first major tributary of the North Branch Potomac River from its source. The river was named for 18th century surveyor John Savage.
The Beaver River is a small mountain stream which flows from the Adirondack Mountains to the Black River at Naumburg, north of Lowville in northwestern New York. The Beaver flows through parts of Hamilton, Herkimer, and Lewis counties. Its source is Lake Lila in Long Lake.
The Green River is a dam-release river that flows through the mountains of North Carolina, south of Asheville. The Green has numerous tributaries, but much of its water flows from a confluence with Big Hungry Creek. The Green River is itself a tributary of the Broad River. The river is dammed to form Lake Summit, in Tuxedo, North Carolina, and Lake Adger near Mill Spring, NC. The Green River is named for its deep green color but runs brown after heavy rains.
The Kettle is an 83.6-mile-long (134.5 km) tributary of the St. Croix River in eastern Minnesota in the United States. Via the St. Croix River, it is part of the watershed of the Mississippi River. The river's English name is due to the large number of large rounded holes (kettles) in the sandstone in and around the river, carved out by the swirling waters of the river. The river's Dakota name Céġa watpa entered into English via the Anishinaabe people's Akiko-ziibi, both meaning "Kettle River".
The Dead River, sometimes called the West Branch, is a 42.6-mile-long (68.6 km) river in central Maine in the United States. Its source is Flagstaff Lake, where its two main tributaries, South Branch Dead River and North Branch Dead River, join. It flows generally east to join the Kennebec River at The Forks, Maine.
The Independence River is a small mountain stream which originates near the western edge of Adirondack Park. Situated north of the Moose River and south of the Beaver River, it begins in Herkimer County and flows west into Lewis County, toward its confluence with the Black River in Watson, north of Lyons Falls and just south of Lowville.
Whitewater canoeing is the sport of paddling a canoe on a moving body of water, typically a whitewater river. Whitewater canoeing can range from simple, carefree gently moving water, to demanding, dangerous whitewater. River rapids are graded like ski runs according to the difficulty, danger or severity of the rapid. Whitewater grades range from I or 1 to VI or 6. Grade/Class I can be described as slightly moving water with ripples. Grade/Class VI can be described as severe or almost unrunnable whitewater, such as Niagara Falls.
The Boonton Gorge is a river gorge in Boonton, New Jersey where the Rockaway River drops over several waterfalls, and travels for slightly over a mile before emptying into the Jersey City Reservoir.
The South Branch Moose River is a river located in Herkimer County, New York. The river starts at Little Moose Lake. South of Old Forge, New York the South Branch and Middle Branch join to become Moose River. Limekiln Falls is located on the South Branch Moose River.
