“Woah! It's like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Evapotranspiration fluxes over mixed vegetation areas measured from large aperture scintillometer

Evapotranspiration fluxes over mixed vegetation areas measured from large aperture scintillometer Routine measurement of spatially averaged surface fluxes of sensible heat ( H ) in river basins is now feasible. These fluxes, when combined with net radiation estimates, can be used to derive areally averaged actual evapotranspiration (ET). The scintillation method is shown to be promising method for estimating areally averaged sensible heat fluxes. The large aperture scintillometer (LAS) is an optical device used to monitor fluctuations in refractive index of the turbulent atmosphere over a relatively large area. The study reported here has estimated ET fluxes for an area of mixed vegetation at Horana, a field site about 40 km southeast of Colombo, Sri Lanka. ET estimates derived from the scintillometer and net radiometer were compared with estimates obtained from a remote sensing based surface energy balance algorithm for land (SEBAL). The SEBAL estimating of ET were derived using NOAA satellite images without any a priori calibration. The average deviation of ET estimates between SEBAL and LAS for 10-day periods was 17%. However, this deviation fell to 1% when monthly estimates were considered. This suggests regional ET values derived from remote sensing are reasonable estimates, however, the LAS was used in only one agro-ecosystem to validate the SEBAL model. The LAS is a low cost alternative to other methods of estimating heat fluxes for use in basin scale water use studies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Agricultural Water Management Elsevier
Loading next page...
 
/lp/elsevier/evapotranspiration-fluxes-over-mixed-vegetation-areas-measured-from-wDv1xhxZBi

You're reading a free preview. Subscribe to read the entire article.

And millions more from thousands of peer-reviewed journals, for just $40/month

Get 2 Weeks Free

To be the best researcher, you need access to the best research

  • With DeepDyve, you can stop worrying about how much articles cost, or if it's too much hassle to order — it's all at your fingertips. Your research is important and deserves the top content.
  • Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.
  • All the latest content is available, no embargo periods.

Stop missing out on the latest updates in your field

  • We’ll send you automatic email updates on the keywords and journals you tell us are most important to you.
  • There is a lot of content out there, so we help you sift through it and stay organized.