Abstract

Two evapotranspiration models: the Penman Monteith model with a combined surface resistance (PM) and the Shuttleworth-Wallace model (SW) and have been compared for the evaluation of the partition between soil and canopy contribution to the evapotranspiration. The model parameters have been calibrated using yearly time series from the CNR ISAC-Lecce database. Both models have been arranged with 5 free (calibrated) parameters. Four of them are related to moisture response of the soil/canopy surface resistances, and the last one being respectively the Leaf Area Index (LAI) for the SW and the scalar transfer coefficient (Ch) for the PM model. After calibration, the models do not show significant overall differences in reproducing the evapotranspiration fluxes, with a slightly lower least square error for the SW model. However, the SW model shows up to a 20% increase of the soil contribution with respect to the PM model. Both models show approximately balanced soil/canopy contributions to the evapotranspiration during the wet season, while the canopy contribution tends to dominate in the dry season.

Autore Pugliese

• Martano Paolo

Tutti gli autori

• P. Martano

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Anno di pubblicazione

2018

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Settori ERC

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Codici ASJC

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