Define | True or False | ||
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What is the definition of a stream?
A body of water flowing in a channel or watercourse, as a river, rivulet, or brook.
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T/F Sediment yield affects streams.
True
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What are the common causes of floods and factors that influence them?
The degree in a location is primarily related to the magnitude, timing, & type of precipitation, human modifications of physical landscape. Ground absorbing water, evaporation rates, and physical characteristics.
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A depositional feature common near rivers?
The broad , flat lands also known as flood plains.
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What is the definition of upstream?
Toward or in the higher part of a stream; against the current.
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T/F Channel roughness slows down water moving through a stream.
True
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What is a flood?
A temporary overflow of a river onto adjacent lands not normally covered by water.
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What is a deposit that causes the main channel to split into several smaller channels?
Braided Stream.
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What is the definition of downstream?
With or in the direction of the current of a stream.
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T/F Laminar flow is slowed down water movement.
False, movement of water in a series of sheets.
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When do they occur?
Amount of water on the land surface exceeds the volume of water that can be transported in stream channels. They can occur almost anywhere, any time.
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Floodplains have been considered for?
Prime sites for urban and agricultural development because of flat lands, fertile soils, and ready access to water.
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What is the definition of erosion?
The process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.
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T/F Turbulent flow allows lifting and support of fine particles.
True
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How is a delta formed?
Rivers dump much of their sediment to form a delta where they enter the relatively quiet waters of an ocean or lake.
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Erosion produces?
Bed load, suspended load, and dissolved load that can be collectively referred to as the stream load.
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What is the definition of substrate?
An underlying substance or layer.
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T/F Channel shape is the efficiency of a streams shape measured by its hydraulic radius
True
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What is the process of lateral migration?
Stream can migrate across a valley floor in the direction of the erosion.
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What influences the stream load?
Geology and land use of drainage basin.
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