When a stream's discharge increases, erosive energy increases.
When the discharge of a stream increases, so does it's velocity. When it decreases, so does the velocity.
When stream discharge increases, more water is flowing through a corridor. To accommodate that, the water will rise in the channel. Depending on the geometry of the channel, the width of wetted water surface may increase as the water fills a different geometry. If the width of the cross-sectional geometry is constant, however, only depth will increase, along with velocity.
Melting snow increases runoff in spring
the competence and capacity of a steam depend on a streams velocity and discharge. Because the velocity and discharge of a given stream are not constant , the competence and capacity of a stream are not constant . competence and capacity vary along a stream and change throughout the year.
Melting snow increases runoff in spring.
The ability of a stream to erode and transport material largely depends on its velocity, gradient, and discharge. Streams with higher velocities, steeper gradients, and greater discharge have more erosive power and are better able to transport sediment.
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An increase in stream velocity can be due to factors such as a steeper gradient, higher discharge, narrower channel width, or decreased channel roughness. These factors can contribute to higher flow velocities in rivers or streams.
Stream discharge physically depends on two factors: stream cross-sectional area and velocity. Area is composed of width and depth. Q (flow) = vel x width x depth. Stream elevation change, or how steep a stream is, will affect the velocity. Higher sloping streams (like those with few meanders) will travel faster than sinuous, snaking streams that have a lower elevation drop per length of stream.
Higher velocity of the stream increases erosion by carrying and transporting more sediments, which can wear away the streambed and banks more quickly. It also increases the force of the water, allowing it to break down and transport larger rocks and debris. Conversely, lower velocity streams erode more slowly.
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