Drawdown has four distinct meanings:
  • Drawdown (hydrology)
    Drawdown (hydrology)
    In water-related science and engineering there are two similar but distinct definitions in use for drawdown.*In subsurface hydrogeology, drawdown is the change in hydraulic head observed at a well in an aquifer, typically due to pumping a well as part of an aquifer test or well test.*In surface...

    , a lowering of a reservoir or a change in hydraulic head in an aquifer, typically due to pumping a well.
  • Drawdown (economics)
    Drawdown (economics)
    The Drawdown is the measure of the decline from a historical peak in some variable ....

    , decline in the value of an investment, below its all-time high.
  • Drawdown (printing), a test of a particular ink on a particular substrate accomplished by spreading the ink with a spatula
  • Drawdown (general), a reduction or decrease
  • Drawdown (polymer molding)
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