Results 261 to 270 of about 64,671 (300)

Estimating actual evapotranspiration using RS and GIS

SPIE Proceedings, 2006
Evapotranspiration, a major component in terrestrial water balance and net primary productivity models, is difficult to measure and predict. Remote sensing cannot provide a direct measurement of evapotranspiration (ET) but it can provide a reasonably good estimate of Evaporative Fraction (EF), defined as the ratio of ET and available energy. Recent
Vajja Hari Prasad, R. Hrishikesh Mahadev
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Pan Evaporation, Potential and Actual Evapotranspiration

Journal of Applied Meteorology, 1967
Abstract A formula for estimating the evapotranspiration rate from temperature and relative humidity data is given. Results of some tests of the accuracy of the equation indicate that it is better than other equations based on a similar number of variables.
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Model Etforest for Calculating Actual Evapotranspiration

1979
ABSTRACT The model calculates actual evapotranspiration from potential evapotranspiration, with leaf area, root development, and soil water as limiting factors. The evapotranspiration is divided into transpiration, evaporation from soil surface, and evaporation of intercepted precipitation in canopy.
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COMPARISON OF ACTUAL AND CROP EVAPOTRANSPIRATION FROM GRAPE VINES

Acta Horticulturae, 2000
Maximum crop evapotranspiration (ETc) represents the evapotranspiration rate for a crop with little or no reduction in transpiration due to a water limitation. However, ETc is dependent on the irrigation method and management because of the influence on soil evaporation.
Spano D, Duce P, Deidda P, Motroni A
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Mapping Spatially Interpolated Precipitation, Reference Evapotranspiration, Actual Crop Evapotranspiration, and Net Irrigation Requirements in Nebraska: Part II. Actual Crop Evapotranspiration and Net Irrigation Requirements

Transactions of the ASABE, 2012
With the world population expected to increase by 3.7 billion people by 2050, it is anticipated that the additional food and fiber required to feed future generations will impose greater pressure on freshwater resources. Approximately 70% to 80% of global freshwater withdrawal is for irrigation, and more than 40% of food is produced on irrigated land ...
null V. Sharma, null S. Irmak
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Distributed Estimation of Actual Evapotranspiration Through Remote Sensing Techniques

2007
Evapotranspiration (ET) is one of the main water balance components, and its actual value appears to be the most difficult to measure directly. Therefore, the choice of reliable models capable of predicting spatially distributed actual ET represents a drought monitoring fundamental aspect.
CALCAGNO G, MENDICINO, Giuseppe, MONACELLI G, SENATORE A, VERSACE P.   +4 more
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An experimentally derived model for actual evapotranspiration

Agricultural Meteorology, 1971
Abstract Experimental data from several different climatic regions were used to develop a statistical model for actual water loss rates from land surfaces. The actual evapotranspiration rate was considered to be influenced by the amount of available water in the soil and by meteorological and plant conditions which determine the potential ...
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Observing actual evapotranspiration using smartphone sensors

Evapotranspiration plays a key role in the terrestrial water cycle, climate extremes and vegetation functioning. However, the understanding of spatio-temporal variability of evapotranspiration is limited by a lack of measurement techniques that are low-cost, and that can be applied anywhere at any time.
Adriaan J. (Ryan) Teuling, Jasper Lammers   +1 more
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The LABFLUX model for actual evapotranspiration

2018
We provide the description of a new model approach for the diagnosis of actual evapotranspiration in terrains with complex orography. The LABFLUX model inputs come from existent network of standard meteorological stations, from land cover maps, and from digital terrain model. We performed a model validation, using measured eddy covariance data. Results
Niccolò Dematteis, Davide Gisolo, Giulia Raffelli, Marco Boetti, Jacopo Balocco, Maurizio Previati, Davide Canone, Stefano Ferraris, Antonello Provenzale   +8 more
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Actual Evapotranspiration [mm/year]

2021
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