What characterizes a braided channel quizlet?
Occurs when the river is forced to split into several channels separated by islands. It is a feature of rivers that are supplied with large loads of sand and gravel.
What is a braided stream?
( brā′dĭd ) A stream consisting of multiple small, shallow channels that divide and recombine numerous times forming a pattern resembling the strands of a braid. Braided streams form where the sediment load is so heavy that some of the sediments are deposited as shifting islands or bars between the channels.
What causes a braided stream?
Braided streams typically get their start when a central sediment bar begins to form in a channel due to reduced streamflow or an increase in sediment load. The central bar causes water to flow into the two smaller cross sections on either side. The smaller cross section results in a higher velocity flow.
What are braided streams quizlet?
braided stream. Braided streams form where channels are choked by sediment and the flow is forced around sediment obstructions, flow occupies multiple channels across a valley.
What is the difference between meandering streams and braided streams?
How does a braided stream differ from a meandering stream? A braided stream have numerous, subparallel braided channel strands. A meandering stream consists of a single highly sinuous channel. Thus, during normal flow, the sediment settles out and the channel becomes choked with sediment.
What factors determine if a stream will be meandering or braided?
Braided streams tend to occur in rivers with high sediment loads or coarse grain sizes, and in rivers with steeper slopes than typical rivers with straight or meandering channel patterns.
Where is a braided stream?
Extensive braided river systems are found in Alaska, Canada, New Zealand's South Island, and the Himalayas, which all contain young, rapidly eroding mountains. The enormous Brahmaputra-Jamuna River in Asia is a classic example of a braided river.
Where do braided streams occur?
Braided Rivers They typically carry fairly coarse-grained sediment down a fairly steep gradient. Additionally, the water discharge tends to be highly variable. Consequently, braided rivers usually exist near mountainous regions, especially those with glaciers.
Where are braided streams?
Braided Rivers
| Kicking Horse River, Yoho National Park, British Columbia | Resurrection River, Kenai Peninsula, Alaska |
|---|---|
| Resurrection River, Kenai Peninsula, Alaska | At-Bashi River, Tien Shan Mtns., Kyrgyzstan |
Why does a stream become braided quizlet?
How might a stream channel become braided? If a large portion of a stream's sediment load consists of coarse material and the stream has a highly variable discharge, a stream channel can become braided.
Which of the following factors characterizes the difference between a braided stream and a meandering stream?
How does a braided stream differ from a meandering stream? A braided stream have numerous, subparallel braided channel strands. A meandering stream consists of a single highly sinuous channel. Thus, during normal flow, the sediment settles out and the channel becomes choked with sediment.
What is braiding in geography?
A braided channel is one that is divided into smaller channels by temporary islands called eyots. Braided channels tend to form in rivers that have a significant amount of sedimentary load, a steep profile and where discharge regularly fluctuates.
What is the difference between meandering and braided streams?
How does a braided stream differ from a meandering stream? A braided stream have numerous, subparallel braided channel strands. A meandering stream consists of a single highly sinuous channel. Thus, during normal flow, the sediment settles out and the channel becomes choked with sediment.
What is braided channel in geography?
A braided channel, also known as a braided river, refers to a network of small channels that are separated by minute and temporary islands known as braid bars, creating a unique appearance.
Are braided stream channels shallow?
A relatively shallow stream that consists of a network of river channels separated by small, and often temporary, islands called braid bars. Braided streams typically form downstream of a glacier in rivers with low slope and large sediment load.
Which of the following factors affect a stream’s flow velocity?
Gradient, cross-sectional shape, channel size and roughness, and discharge all affect a stream's flow velocity.
What is a stream quizlet?
Definition of stream. Body of water, large or small that flows over the land surface.
What is the difference between a braided and meandering river?
Braided rivers are typically wider and shallower than meanders of similar discharge; they transport more bedload and scour and fill their beds more dramatically; and above all they erode their banks more rapidly, extensively, and unpredictably.
What do braided streams indicate about sediment load?
What do braided streams indicate about sediment load? Sediment load is excessive and deposition is exceeding erosion.
What conditions would cause a stream’s velocity to increase?
Flood Erosion and Deposition: As flood waters rise, the slope of the stream as it flows to its base level (e.g., the ocean or a lake) increases. Also, as stream depth increases, the hydraulic radius increases thereby making the stream more free flowing. Both of these factors lead to an increase in stream velocity.
What factors control a stream’s velocity?
The velocity of a river is determined by many factors, including the shape of its channel, the gradient of the slope that the river moves along, the volume of water that the river carries and the amount of friction caused by rough edges within the riverbed.
How do streams transport sediments quizlet?
How do streams transport sediments? Streams transport sediment in solution, in suspension, and by rolling along the bottom.
What are the three ways streams transport sediment?
Sediment load is the solid material carried by water and transported through saltation (bouncing), traction (rolling and dragging) and suspension (carrying in water).
How does a braided stream differ from a meandering stream?
How does a braided stream differ from a meandering stream? A braided stream have numerous, subparallel braided channel strands. A meandering stream consists of a single highly sinuous channel. Thus, during normal flow, the sediment settles out and the channel becomes choked with sediment.
What do braided streams indicate about sediment load quizlet?
Water flows from side-to-side in a stream, eroding its banks. What do braided streams indicate about sediment load? Sediment load is excessive and deposition is exceeding erosion.
What factors control whether a river is braided or meandering?
The form of the river is controlled by the gradient of the river bed (steep = braided, gently dipping = meandering), local vegetation that stabilizes banks and limits the number of channels, sediment grain size, particularly the ratio of suspended versus bedload sediment, and sediment volume.
What three factors influence a stream’s velocity?
Factors that influence a stream's velocity include gradient, channel shape, and channel roughness.
What two factors will increase the rate of a stream’s flow?
Flood Erosion and Deposition: As flood waters rise, the slope of the stream as it flows to its base level (e.g., the ocean or a lake) increases. Also, as stream depth increases, the hydraulic radius increases thereby making the stream more free flowing. Both of these factors lead to an increase in stream velocity.
How do streams transport their load?
Streams transport their load of sediment in three ways: in solution (dissolved load) in suspension (suspended load) or scooting or rolling along the river bottom (bed load).
How do stream transport sediments?
Most of the sediment transport occurs in high flow conditions. Sediment load is the solid material carried by water and transported through saltation (bouncing), traction (rolling and dragging) and suspension (carrying in water).