Large Scale Evapotranspiration from Remotely Sensed Surface Temperatureby J. L. Hatfield, USDA, United States,
Document Type: Proceeding Paper
Part of: Planning Now for Irrigation and Drainage in the 21st Century
Large scale evapotranspiration requires a blend of ground-based and remotely sensed data. To evaluate the utility of the extension from a small to a large scale, studies were conducted on wheat and cotton crops. Autocorrelation analysis revealed that daily measurements were needed of all meteorological parameters. The aerodynamic resistance term was related to the windspeed and a vegetative index based on near-infrared and red reflectance. This approach offers a possible method for large scale (>1km) evapotranspiration.
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