River Processes

Description

Geography (Rivers and Coasts) Mind Map on River Processes, created by anneka.copeland on 04/24/2014.
anneka.copeland
Mind Map by anneka.copeland, updated more than 1 year ago
anneka.copeland
Created by anneka.copeland almost 11 years ago
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Resource summary

River Processes
  1. Erosion
    1. Hydraulic Action
      1. The force of the river against the banks can cause air to be trapped in cracks and crevices. The pressure weakens the banks and gradually wears it away.
      2. Abrasion
        1. Rocks carried along by the river wear down the river bed and banks.
        2. Attrition
          1. Rocks being carried by the river smash together and break into smaller, smoother and rounder particles.
          2. Solution
            1. Soluble particles are dissolved into the river.
          3. Transport
            1. Solution
              1. Minerals are dissolved in the water and carried along in solution.
              2. Suspension
                1. Fine light material is carried along in the water.
                2. Saltation
                  1. Small pebbles and stones are bounced along the river bed.
                  2. Traction
                    1. Large boulders and rocks are rolled along the river bed.
                  3. Deposition
                    1. When a river loses energy, it will drop or deposit some of the material it is carrying.
                      1. Deposition may take place when a river enters an area of shallow water or when the volume of water decreases.
                        1. After a flood
                          1. During time of drought
                          2. Deposition is common towards the end of a river's journey, at the mouth.
                            1. Deposition at the mouth of a river can form deltas
                              1. Mississippi Delta
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