Evaporation and the Soil Moisture Availability Coefficient

Abstract

Evaporative processes at the air-earth interface are examined in terms of a moisture availability coefficient. A postulate is formed for developing the availability coefficient utilizing the ratio of potential evaporation to actual evaporation. Experimental data is used to evaluate this approach and results indicate that the moisture availability coefficient appears to be independent of climate, season of the year or latitude and soil type. A preliminary study of the effects of atmospheric water vapor on the dynamic stability of the surface boundary layer was also undertaken. Evaporation, Evapotranspiration, Similarity theory, Obukhov scaling length, Water vapor, Specific humidities.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1994
Accession Number
ADA280634

Entities

People

  • Frank V. Hansen

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Artillery
  • Atmospheric Motion
  • Atmospheric Sciences
  • Availability
  • Boundaries
  • Boundary Layer
  • Evaporation
  • Experimental Data
  • Heat Energy
  • Humidity
  • Latent Heat
  • Layers
  • Military Research
  • Vapor Pressure
  • Vapors
  • Warfare
  • Water Vapor

Readers

  • Agricultural Chemistry/Soil Science
  • Fluid Dynamics.