A meander bend that gets cut off from the main channel becomes an oxbow lake . A stream with a single channel is called a braided stream. All of the possible answers are correct. A meander bend that gets cut off from the main channel becomes an oxbow lake.
What is a meander cutoff quizlet?
cut off meander. A portion of the stream that is cut off from the main channel because of erosion .
Why do meandering rivers meander move across their floodplain?
Why do meandering rivers meander (move) across their floodplain? They are curved, which causes erosion on one side of the curve and deposition on the other side of the curve , thus moving the river in the direction of erosion.
Which statement is true stream flow is fastest in the center of the channel near the surface?
Water flow in a stream is primarily related to the stream’s gradient, but it is also controlled by the geometry of the stream channel. As shown in Figure 13.14, water flow velocity is decreased by friction along the stream bed, so it is slowest at the bottom and edges and fastest near the surface and in the middle.
Are shallow stream less turbulent than a Deepstream?
A shallow stream is less turbulent than a deep stream. ... The slowest-moving part of a stream is called the thalweg. B. Stream flow is fastest in the center of the channel near the surface.
What controls a stream’s speed?
Factors that influence a stream’s velocity include gradient, channel shape, and channel roughness .
How do oxbow lakes form quizlet?
An oxbow lake is a U-shaped body of water that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water .
What are two components of a river’s flow?
“Flow” refers to the water running in a river or stream. There are two important aspects to a river’s natural flow. First, there is the amount of water that flows in the river. Some rivers get enough water from their headwaters, tributaries, and rain to flow all year round .
Is a 100 year flood more destructive than a 50 year flood?
Many mistakenly believe that it is a flood that occurs every 100 years. ... For instance, there are 10-year, 25-year, 50-year, 100-year, and 500- year floods. A 100-year flood, although less frequent than a 10-year flood, is deeper— and far more destructive .
Where does the most erosion occur on a meandering river?
Thus by eroding its outer bank and depositing material along its inner bank, a stream moves sideways without changing its channel size. Due to the slope of the channel, erosion is more effective on the downstream side of a meander .
Which part of a river flows the fastest?
1. Toward the middle of a river , water tends to flow fastest; toward the margins of the river it tends to flow slowest. 2. In a meandering river, water will tend to flow fastest along the outside bend of a meander, and slowest on the inside bend.
Where is the fastest flow in a stream?
Streams. If a stream is flowing along straight, the strongest, fastest flow will be in the center of the stream well above the bottom of the bed or channel but below the surface .
Where is water flowing fastest around a bend in a river?
In straight rivers, the fastest flow is in the middle of the river and around bends the water tends to flow fastest and be deepest around the outer edge of the bend. In other words, the position of the fastest surface flow is displaced towards the outer edge of the bend.
What factors would decrease flow velocity?
- Channel Shape. The shape of the channel affects the velocity of a river. ...
- Volume of Water. The volume of water that flows through a river within a given amount of time — known as the discharge — also affects its velocity. ...
- Smooth and Rough Channels. ...
- Riverbed’s Gradient.
What is another term for stream sediment?
A term for a topographic high separating two drainage basins. What is another term for drainage basin? Watershed. What is another term for stream sediment? Alluvium .
How fast must a stream be flowing to keep a 1 cm sediment in suspension?
If it is resting on the bottom, it will remain there until the velocity is high enough to erode it, around 20 centimetres per second (cm/s). But once it is in suspension, that same 1 mm particle will remain in suspension as long as the velocity doesn’t drop below 10 cm/s.
