65 Symposium--Accuracy, Uncertainty, and Limitations of Evapotranspiration Quantification in Agriculture

Oral Session
ASA Section: Climatology & Modeling
Quantification of evapotranspiration (ET) requires understanding of the capabilities and limitations of each technique. This symposium is focused on the accuracy, uncertainty, and limitations of established techniques for measuring or modeling ET. We invite presentations on the theoretical and empirical considerations that affect the accuracy of various ET measurement or modeling techniques. Techniques may include eddy correlation, Bowen ratio energy balance, lysimetry, surface renewal, water balance, sap flow, scintillometry, remote sensing-based algorithms, and direct modeling. A keynote speaker will be featured, but contributed presentations are also included. The symposium will conclude with a panel discussion.

Evapotranspiration Measurement and Modeling Community

Monday, November 4, 2013: 1:00 PM-4:25 PM
Tampa Convention Center, Room 5

Community Leader:
Allan A. Andales
George Paul
Allan A. Andales
1:00 PM
Introductory Remarks
2:25 PM
Evapotranspiration Measurements Using Weighing Lysimeters: The Rocky Ford Experience.
Allan A. Andales, Colorado State University; Jose Luis Chavez, Colorado State University; Lane Simmons, Colorado State University; Michael Bartolo, Colorado State University
2:40 PM
Is Scintillometer Measurement Accurate Enough for Evaluating Remote Sensing Based Energy Balance ET Models ?.
George Paul, Texas Agrilife Research-Amarillo; Prasanna H. Gowda, USDA-ARS Grazinglands Research Laboratory; P.V. Vara Prasad, Kansas State University; Terry A. Howell, USDA-ARS Conservation & Production Research Laboratory; Sukanta Basu, North Carolina State University
2:55 PM
3:20 PM
An Integrated Framework of Operational ET Remote Sensing Program for Irrigation Management in the Texas High Plains.
Thomas H. Marek, Texas A&M AgriLife Research; Prasanna H. Gowda, USDA-ARS Grazinglands Research Laboratory; Dana Osborne Porter, Texas A&M Agrilife Research and Extension Service; Terry A. Howell, USDA-ARS Conservation & Production Research Laboratory; George Paul, Texas Agrilife Research-Amarillo; Paul D. Colaizzi, USDA-ARS Conservation and Production Research Laboratory
3:35 PM
Sensitivity and Uncertainty of Input Sensor Accuracy for Grass-Based Reference Evapotranspiration.
Kendall DeJonge, USDA-ARS; Mehdi Ahmadi, Colorado State University; James C. Ascough II, USDA-ARS; Kristoph-Deitrich Kinzli, Florida Gulf Coast University
3:50 PM
Modeling Evapotranspiration and Energy Balance in a Wheat-Maize Cropping System Using the Revised RZ-SHAW Model.
Quanxiao Fang, Qingdao Agricultural University; Liwang Ma, USDA-ARS; Gerald N. Flerchinger, USDA-ARS; Lajpat R. Ahuja, USDA-ARS
4:05 PM
4:25 PM