Theoretical and Applied Climatology

, Volume 43, Issue 3, pp 123–128 | Cite as

An empirical relationship between temperature, vapour pressure deficit and wind speed and evaporation during a winter chinook

  • L. C. Nkemdirim


Evaporation rates determined by energy balance and bulk transfer equations and confirmed with soil moisture sampling was regressed against average daytime temperature, vapour pressure deficit and wind speed over several chinook events between 1986 and 1988. The equationE = 0.45 exp (0.35\(\overline T \) + 0.025ū — 0.133 [e*e]) yielded reasonable estimates of evaporation with surface soil moisture between saturation and near wilting point.E is evaporation in mmd−1,T, u ande* ande are temperature (°C), wind speed (ms−1), saturation vapour pressure and vapour pressure (mb) respectively. The overbar denotes daytime average.


Waste Water Evaporation Wind Speed Soil Moisture Vapour Pressure 
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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • L. C. Nkemdirim
    • 1
  1. 1.Department of GeographyThe University of CalgaryCalgaryCanada

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