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Author Question: Streams are important agents of transport for sediments. Define sediment load and explain the link ... (Read 67 times)

lracut11

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on: Jul 16, 2018
Streams are important agents of transport for sediments. Define sediment load and explain the link between sediment load and drainage-basin climate.
 
  What will be an ideal response?

Question 2

How is erosion by water flowing in an alluvial stream different from that in a bedrock stream?
 
  What will be an ideal response?


qytan

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Sediment load is defined as the particles carried by a stream. Regions with high precipitation and intense weathering such as the tropics generally have a higher sediment load.

Answer to Question 2

In an alluvial stream, loose particles already exist and are moved by the flowing water as long as the applied shear stress is sufficient to move the particles. In a bedrock stream, the particles have to first be produced. Abrasion of the bedrock by sediment particles transported in the flowing water is one erosional process. Plucking also occurs, when the shear stress of the flowing water is sufficient to dislodge pieces of bedrock that can be separated along fractures and bedding planes.


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