Long Profile: changing processes
- Created by: Sharon
- Created on: 08-04-15 14:24
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- Long Profile: Changing processes.
- EROSION
- Abrasion
- Fragments rubbing bed and banks
- Hydraulic action
- Power of moving water
- Attrition
- Fragments striking each other
- Corrosion
- Minerals in rock disolved by acid in water
- Vertical - upper
- River cutting down to base level
- Lateral - middle/lower
- Energy widens channel as level at base
- Abrasion
- TRANSPORTATION
- Traction
- Stones rolled along the bed
- Saltation
- Small stones leap frog channel bed dislodging others
- Suspension
- small particles (sand/silt) carried
- Solution
- Disolved minerals transported
- capacity
- If velocity doubles, capacity increases X8
- Competence
- If velocity doubles, competence increases 64 times
- Traction
- DEPOSITION
- When longer competent to carry load (reduced energy)
- Reduction in gradient
- Discharged reduced
- Shallower water
- Increased load size
- River floods
- When longer competent to carry load (reduced energy)
- EROSION
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