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23 Cards in this Set

  • Front
  • Back
when rocks are dislodged or dissolved from the earth's surface
erosion takes place under three categories
hydrolic action
hydrolic action
erosion by water
material carried in running water can scrape the bed and bank
the disolving of rocks
Amount of sediment dislodged
the more discharge the greater amount of sediment
discharge is the
amount of water in a stream at a specific point at a given time
discharge is measured by
cfs or cms
discharge measures the
volume of rivers and streams
the greater the sediment load
the greater ability that water has to erode
the greater the velocity
the greater the ability to erode
the greater the friction caused by surface roughness
the greater the amount of turbulance in the water
increased turbulance
increases the waters abiility to erode
the steeper the slope
the easier the water can erode materials
variation in sediment load, velocity, friction, resistance, and slope
varies significantly within short distances
the greater the resistance of rocks
the harder they are to erode
most streams erode both
vertically and horizontally
steeper gradients across space lead to
more erosion
gentle gradients cause
hosizontal erosion
most streams atempt to reach
base level or sea level (untrue in many cases
rivers and streams are in
dynamic equalibrium with their environments
rivers reach a condition
where they appear not to change
rivers remain to appear to stay the same until their
environments change and they change to match it