6533b871fe1ef96bd12d1bac

RESEARCH PRODUCT

ESTIMACIÓN DE LA EVAPORACIÓN/TRANSPIRACIÓN EN UN CULTIVO DE TRIGO MEDIANTE RADIOMETRÍA TÉRMICA

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[EN] This work shows the application of a two-source energy balance model, together with surface temperature measurements, to derive hourly and daily values of land surface energy fluxes of wheat, crop evapotranspiration (ETc) included. An experiment was carried out during the spring of 2014 in a wheat field located in the experimental farm of “Las Tiesas” in Barrax, Albacete. Soil and canopy radiometric temperatures were measured, as well as meteorological variables and biophysical parameters, from plantation to senescence. Results were compared to measurements in a weighing lysimeter installed within the wheat field. Estimation errors of ±0.10 mm h-1 and ±0.9 mm d-1 were obtained at hourly and daily scales, respectively. Cumulated value of ETc for the whole campaign was only 4% over that registered in the lysimeter. Furthermore, a percentage 30% - 70% between evaporation (E) and transpiration (T) components was obtained for the full campaign. Modeled values of the wheat crop coefficients were also retrieved and compared to those proposed by FAO56.