A carregar...
Publicação
A simple procedure to estimate reference evapotranspiration during the irrigation season in a hot-summer Mediterranean climate
| Nome: | Descrição: | Tamanho: | Formato: | |
|---|---|---|---|---|
| 2.24 MB | Adobe PDF |
Autores
Orientador(es)
Resumo(s)
The Food and Agricultural Organization of the United Nations (FAO) Penman–Monteith
(PM) method is widely regarded as the most effective reference evapotranspiration (ETo) estimator;
however, it requires a wide range of data that may be scarce in some rural regions. When feasible
relative humidity, solar radiation and wind speed data are unavailable, a temperature-based method
may be useful to estimate ETo and provide suitable data to support irrigation management. This
study has evaluated the accuracy of two ETo estimations methods: (1) a locally and monthly adjusted
Hargreaves–Samani (HS) equation; (2) a simple procedure that only uses maximum temperature and
a temperature adjustment coefficient (MaxTET). Results show that, if a monthly adjusted radiation
adjustment coefficient (kRs) is calibrated for each site, acceptable ETo estimations (RMSE and R2
equal to 0.79 for the entire region) can be achieved. Results also show that a procedure to estimate
ETo based only on maximum temperature performs acceptably, when compared with ETo estimation
using PM equation (RMSE = 0.83 mm day1 and R2 = 0.77 for Alentejo). When comparing these
results with the ones attained when adopting a monthly adjusted HS method, the MaxTET procedure
proves to be an accurate ETo estimator. Results also show that both methods can be used to estimate
ETo when weather data are scarce
Descrição
Palavras-chave
reference evapotranspiration FAO Penman–Monteith Hargreaves-Samani maximum temperature procedure irrigation hot-summer Mediterranean climate
Contexto Educativo
Citação
Rodrigues, G.C.; Braga, R.P. A Simple Procedure to Estimate Reference Evapotranspiration during the Irrigation Season in a Hot-Summer Mediterranean Climate. Sustainability 2021, 13, 349
Editora
MDPI