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Measuring and modelling soil evaporation in an irrigated olive orchard to improve water management
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Orientador(es)
Resumo(s)
The aim of this study was to estimate soil evaporation (Es) in an intensive olive orchard.
Measurements of Es were performed for 19 days using microlysimeters, during summers 2010,
2011 and 2012 in southeast Portugal. In order to relate each area type to radiation transmissivity,
ground cover measurements were performed over the years. These data were used to calibrate and
validate an empirical model for Es estimation. Measured daily average Es was 0.55 0.14 mm; the
model estimated 0.53 0.18 mm for the same days, with a determination coe cient of 0.94. This
corresponds to 9% of the reference evapotranspiration, representing well the overall values estimated
for the summer, except for days after rain. Regarding the wet area, measured Es for the validation
data set was 2.42 L/(m2 of wet area), the estimated was 2.49 L/(m2 of wet area). Measured average Es
in dry area (validation data set) was 0.42 L/(m2 of dry area), estimated Es was 0.43 L/(m2 of dry area).
The large exposed dry area had a significant contribution to evaporation. On average, estimated Es
during a typical Mediterranean summer was 10% of reference evapotranspiration, representing 30%
of transpiration and 23% of evapotranspiration
Descrição
Palavras-chave
lysimeters evapotranspiration irrigation light interception transmissivity
Contexto Educativo
Citação
Water 2019, 11, 2529
Editora
MDPI