Evaluation of FAO-56 Penman-Monteith Model Using Alternative Climatic Data Application to Afghanistan

Avaliação do Modelo Penman-Monteith FAO-56 Usando Dados Climáticos Alternativos Aplicação para o Afeganistão

Abstract

The Penman-Monteith model with alternative and measured data in three regions of Afghanistan (Central-North- East) was discussed by estimating reference evapotranspiration (ET₀). The result showed that in the high rate of ET₀, the difference between ET₀ that estimated using alternative and measured data could be more than 2 mm day^-1 when using alternative humidity and wind data in the Central region. Because there is a windy season in the Central region only, the results seem to mean that one of the cases, the impact of the windy season on the Penman-Monteith model, has been found. The alternative solar radiation was effective in any region.

Keywords:
reference evapotranspiration; FAO-56 Penman-Monteith; alternative data