Whitewater forms in the context of rapids, 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 Kennebec River is a 170-mile-long (270 km) river within the U.S. state of Maine. It rises in Moosehead Lake in west-central Maine. The East and West Outlets join at Indian Pond and the river flows southward. Harris Station Dam, the largest hydroelectric dam in the state, was constructed near that confluence. The river is joined at The Forks by its tributary the Dead River, also called the West Branch.
The Lehigh River is a 109-mile-long (175 km) tributary of the Delaware River in eastern Pennsylvania. The river flows in a generally southward pattern from the Pocono Mountains in Northeastern Pennsylvania through Allentown and much of the Lehigh Valley before joining the Delaware River in Easton.
The Toccoa River and Ocoee River are the names in use for a single 93-mile-long (150 km) river that flows northwestward through the southern Appalachian Mountains of the southeastern United States. It is a tributary of the Hiwassee River, which it joins in Polk County, Tennessee, near the town of Benton. Three power generating dams are operated along it.
The Nolichucky River is a 115-mile (185 km) river that flows through western North Carolina and East Tennessee in the southeastern United States. Traversing the Pisgah National Forest and the Cherokee National Forest in the Blue Ridge Mountains, the river's watershed includes some of the highest mountains in the Appalachians, including Mount Mitchell in North Carolina, the highest point in the eastern United States. The river is a tributary of the French Broad River and is impounded by Nolichucky Dam near Greeneville, Tennessee.
The Matiri River is a river located in the northwest of New Zealand's South Island. The river is in the Tasman Region.
The Kaituna River is in the Bay of Plenty region of the North Island of New Zealand. It is the outflow from Lakes Rotorua and Rotoiti, and flows northwards for 45 kilometres (28 mi), emptying into the Bay of Plenty near Te Puke. It was the subject of a claim concerning the effluent flowing down the river from Lake Rotorua, which resulted in movement to a land treatment system.
The Alsek River is a wilderness river flowing from Yukon into Northern British Columbia and into Alaska. It enters the Gulf of Alaska at Dry Bay.
The Chattooga River is the main tributary of the Tugaloo 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 Perth River is a river in the Southern Alps in the West Coast region of New Zealand's South Island. Its source is in terrace icefields north of the Rangitata Divide and is joined by multiple tributaries, including a creek from Abel Lake. It features a number of rapids and passes through two gorges before meeting the Whataroa River. The river is largely inaccessible, but recently, an adventure tourism company has begun offering "heli-rafting" on the river: whitewater rafters are flown in by helicopter to raft the river.
Whataroa is a small township in southern Westland on the West Coast of New Zealand's South Island. It is located on alluvial flats to the west of the Whataroa River. State Highway 6 passes through Whataroa on its route from Ross to Franz Josef / Waiau. Hari Hari is 31 kilometres (19 mi) to the north-east, and Franz Josef is 32 km to the south-west.
The Butler River is a river of New Zealand. The source of the river is the Whataroa Glacier on the north western slopes of McKinnon Peak in the Southern Alps. From there the river flows in a west direction reaching the Whataroa River 15 kilometres (9 mi) southeast of Whataroa.
The Ōkārito River is a river of the West Coast Region of New Zealand's South Island. It flows northwest from the northern end of Lake Mapourika, reaching the Ōkārito Lagoon 15 kilometres west of Whataroa.
The Rotokino River is a short river of the West Coast Region of New Zealand's South Island. It flows south from Lake Rotokino, draining its waters to the Whataroa River.
The Waitangitāhuna River are two rivers in the West Coast region of New Zealand's South Island. It was a single river until an avulsion in March 1967, when it became two rivers. Since then, the southern portion of the river has flowed into Lake Wahapo, while the northern section discharges into the Tasman Sea north of Ōkārito Lagoon.
The Russell River is a river in Far North Queensland, Australia. The 59-kilometre (37 mi)-long river flows towards the Coral Sea and is located approximately 60 kilometres (37 mi) south of Cairns.
The Butler Range, also known as North Butler Range, is a range located in the Westland District of the West Coast Region on the South Island of New Zealand. The range has also been known as Peaks of the Mist Range.
Lake Wahapo is a small glacial lake in South Westland, New Zealand, within the Westland Tai Poutini National Park and near the township of Whataroa. It was a traditional mahinga kai for local Māori. State Highway 6 skirts the lake's southern shore. The lake discharges to the Ōkārito River via a small hydroelectric power station commissioned in 1960. The ecology of the lake has altered considerably since 1967, when the Waitangitāhuna River changed course to flow into the lake.
