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Soil water balance correction due to light rainfall, dew and fog in Ebro river basin (Spain)

AuthorsMoratiel Yungueros, Rubén; Martínez-Cob, Antonio CSIC; Tarquis, A. M.; Snyder, R. L.
KeywordsSoil Water Balance
Light rainfall
Issue DateMay-2016
CitationMoratiel R, Martínez-Cob A, Tarquis AM, Snyder RL. Soil water balance correction due to light rainfall, dew and fog in Ebro river basin (Spain). Agricultural Water Management 170: 61–67 (2016)
AbstractAccumulated daily crop evapotranspiration (ETc) generally provides good estimates of cumulative soil water depletion between irrigation of well drained soils. If the canopy is wet due to fog, dew, or light rainfall, however, energy contribution to surface evaporation will reduce transpiration and hence soil water losses. When surface evaporation occurs, the ETc overestimates the soil water depletion by an amount approximately equal to the surface water evaporation. Moratiel et al. (2013) proposed a method to estimate the contribution of surface water to ETc based on the time of canopy drying. The first method assessment was done with California data, and this evaluation was conducted in the Ebro basin, Spain, to appraise the method in a higher latitude in area with a somewhat different climate. Differences between the California and Spain corrected models were less than 10% and depended mainly on the time of canopy drying. The comparison showed that the model is robust and useful to estimate the fraction (F) of ETc coming from the soil under dew, light rainfall, and fog conditions.
Description25 Pags.- 6 Figs.- 2 Tabls. The definitive version is available at:
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