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Kansas Agricultural Experiment Station Research Reports

2017

Horticulture

Evapotranspiration models

Articles 1 - 2 of 2

Full-Text Articles in Life Sciences

Estimating Transpiration From Turfgrass Using Stomatal Conductance Values Derived From Infrared Thermometry, Kenton W. Peterson, D. Bremer, J. M. Blonquist Jr. Jul 2017

Estimating Transpiration From Turfgrass Using Stomatal Conductance Values Derived From Infrared Thermometry, Kenton W. Peterson, D. Bremer, J. M. Blonquist Jr.

Kansas Agricultural Experiment Station Research Reports

Infrared thermometry provides accurate measurements of plant canopy temperature, which, along with basic weather variables, allows estimation of canopy stomatal conductance to water vapor flux (gc) and transpiration. Using this method we compared modeled estimates of transpiration (CONDT) with evapotranspiration (ET) measurements from nearby microlysimeters (LYSET) in tall fescue (Schedonorus arundinaceus Schreb.) turfgrass. Results indicated transpiration may be reliably estimated via calculation of gc in turfgrass.


Measurement Of Evapotranspiration In Turfgrass: Recommended Techniques And Adjustment Coefficients, Kenton W. Peterson, D. Bremer, Kira B. Shonkwiler, J. M. Ham Jul 2017

Measurement Of Evapotranspiration In Turfgrass: Recommended Techniques And Adjustment Coefficients, Kenton W. Peterson, D. Bremer, Kira B. Shonkwiler, J. M. Ham

Kansas Agricultural Experiment Station Research Reports

Evapotranspiration (ET) from turfgrass can be measured directly using lysimeters (LYS), estimated from weather data using models, or approximated using atmometers. Evapotranspiration measurements from LYS were compared with ET estimates from four variations of the American Society of Civil Engineers (ASCE) standardized ET equation including the use of: 1) hourly steps of measured net radiation (Rn) (ASCEHM); 2) hourly steps of Rn calculated from global irradiance (ASCEHC); 3) daily steps of measured Rn (ASCEDM); and 4) daily steps of Rn calculated from global irradiance (ASCEDC); ET from LYS was also compared with ...