NDLI: Estimation of actual evapotranspiration in winegrape vineyards located on hillside terrain using surface renewal analysis

Content Provider	Springer Nature Link
Author	Shapland, T. M. Snyder, R. L. Smart, D. R. Williams, L. E.
Copyright Year	2012
Abstract	Sensible and latent heat flux densities were estimated in a level vineyard, a northeast aspect vineyard and a southwest aspect vineyard in the Napa Valley of California using the eddy covariance and surface renewal methods. Surface renewal is theoretically not limited to level or extensively homogeneous terrain because it examines a more localized process of scalar exchange as compared with eddy covariance. Surface renewal estimates must be calibrated against eddy covariance data to account for unequal heating of the air parcels under a fixed measurement height. We calibrated surface renewal data against eddy covariance data in a level vineyard, and the calibration factor (α) was applied to the surface renewal measurements on the hillside vineyards. Latent heat flux density was estimated from the residual of the energy balance. In the level vineyard, the average daily actual evapotranspiration (ET a ) for the period of June through September was 2.4 mm per day. In the northeast aspect vineyard, the average daily ET a was 2.2 mm per day, while in the southwest aspect vineyard it was 2.7 mm per day. The net radiation values for the level vineyard, the northeast aspect vineyard, and the southwest aspect vineyard were compared against the Ecosystem Water Program with good agreement.
Starting Page	471
Ending Page	484
Page Count	14
File Format	PDF
ISSN	03427188
Journal	Irrigation Science
Volume Number	30
Issue Number	6
e-ISSN	14321319
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-09-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Agriculture Climate Change Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Environment Sustainable Development
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Water Science and Technology

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