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