Comparison between energy balance and mass balance models for actual evapotranspiration assessment

A. Gentile; L. Pierce; G. Ciraolo; G. Zhang; G. La Loggia; R. Nemani

doi:10.1117/12.830229

18 September 2009 Comparison between energy balance and mass balance models for actual evapotranspiration assessment

A. Gentile, L. Pierce, G. Ciraolo, G. Zhang, G. La Loggia, R. Nemani

Proceedings Volume 7472, Remote Sensing for Agriculture, Ecosystems, and Hydrology XI; 747212 (2009) https://doi.org/10.1117/12.830229
Event: SPIE Remote Sensing, 2009, Berlin, Germany

Abstract

The assessment of the water needs for a specific crop has a fundamental importance in the management of water resources. The application of empirical models able to retrieve estimates of the actual evapotranspiration (ETa) to assess the need for water could give a valid tool for the planning of water supply, avoiding unnecessary water losses. In this context, two independent models for estimating actual evapotranspiration were compared. The first model is based on an energy balance and uses remotely sensed data and ancillary data from weather stations to assess the ETa. The second model also uses remotely sensed data and climatic data on a daily basis from a weather network. Field measurements are needed to calibrate both models. The study was conducted in a commercial vineyard located in Napa Valley (California). The observed range of ETdaily is included within the values measured by other authors. The results retrieved from both models show actual ETdaily values with a different trend over time; after mid-summer (early July) VSIM estimates of ETdaily trend downwards, while SEBAL estimates remain fairly constant. This disagreement illustrate the difficulty in estimating the actual evapotranspiration at the end of season, when soil moisture gets low and vine water stress increases due to reducing stomatal conductance.

Citation Download Citation

A. Gentile, L. Pierce, G. Ciraolo, G. Zhang, G. La Loggia, and R. Nemani "Comparison between energy balance and mass balance models for actual evapotranspiration assessment", Proc. SPIE 7472, Remote Sensing for Agriculture, Ecosystems, and Hydrology XI, 747212 (18 September 2009); https://doi.org/10.1117/12.830229

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Data modeling

Soil science

Heat flux

Earth observing sensors

Radon

Agriculture

Landsat

Show All Keywords

Keywords/Phrases

Search In:

Publication Years