Coasts - Dynamic Equilibrium

  • Dynamic equilibrium info
  • Diagram
  • Key definitions of Positive and negative feedback
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AS Geography 14th May 2010
Coasts Revision
DYNAMIC EQUILIBRIUM
The balanced state of a system when its inputs and outputs are equal
If one element changes because of some outside influence, this upsets the
internal equilibrium and affects other components of the system
By a process of feedback, the system adjusts to the change and regains
equilibrium
IMPACT OF CHANGING WAVE ENERGY ON BEACH PROFILES
KEY TERMS
Equilibrium: The longterm condition of balance or stability in a system, with inputs of
energy and matter equal to outputs of energy and matter
Negative Feedback: The process of selfregulation which restores equilibrium to a
system
Positive Feedback: The process by which an initial change in a system is amplified
and causes further change. E.g. damage to vegetation on a sand dune by trampling
causes erosion of sand, resulting in further loss of vegetation, more erosion etc.
Chris Cartwright

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