Exercise - Exercise 4 Fluvial Geomorphology and Streamflow...

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Exercise 4 Fluvial Geomorphology and Streamflow processes Streams and rivers act as geomorphic agents and move enormous amounts of sediment through stream systems to the ocean. In this lab we will examine some data on different river systems to look for relationships between sediment yield and sediment concentration, discharge, channel slope, bed material size, and velocity. Velocity is the major determinant of erosion by a stream. It is governed by the slope of the channel, the depth of the water, and the roughness of the channel at its bed and sides. Velocity increases as slope and depth increase, velocity decreases as channel roughness increases. However, the fastest flowing rivers on average are those deep, large rivers that flow across plains and low lands. Streams are not only carrying flowing water, they also carry a great deal of material called “sediment”. This sediment is accumulated from the discharge from all its tributaries in the drainage systems and from the direct erosion of the channel sides and bed. Most of the energy in a stream is used to transport sediment. The three kinds of
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Exercise - Exercise 4 Fluvial Geomorphology and Streamflow...

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