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Scheme of Work

The global hydrological cycle

The drainage basin hydrological cycle

The storm hydrograph

Fluvial erosion and transportation

Sediment deposition and the Hjulstrom curve

Valley Long Profile

Valley Cross Profile

Channel efficiency

Landforms of fluvial erosion

Landforms of fluvial deposition

Flood management

Hard and soft solutions

 

Changes in valley cross profile

The cross profile of a river valley is the result of the interaction with fluvial, weathering and slope (mass movement) processes.

Reasons for change include:

  • in the upper course vertical erosion by the river forms steep V shaped valleys, with the river occupying all of the valley floor.
  • lateral erosion forms wider valleys in the middle course,
  • a wide flood plain signals the lower course where there is a lack of erosion and reduced competence, resulting in deposition