Potential evapotranspiration (ET0) is an indicator of great interest for water budget analysis and the agricultural sector. Therefore, purpose this study was to make calculation reliable even if only temperature data were present. In research, ET0 initially calculated a limited number weather stations (12) using Penman–Monteith method. some cases, simplified formula adopted, while in others, as...

Resumo A radiação solar é uma variável climatológica amplamente utilizada em estudos climáticos e pode ser mensurada por meio de estações meteorológicas. Devido ao alto custo difícil manutenção dos equipamentos mensuração, possível estimá-la a partir modelos matemáticos. Assim, o presente estudo objetivou calibrar validar os parâmetros da equação ångström-Prescott Hargreaves & Samani para r...

The proposed method for calculation of potential evapotranspiration is Penman-Monteith FAO method, but there are other methods that require less meteorological data but estimates close to the FAO Penman-Monteith method in different climatic conditions.  Performance evaluation of these methods on the same basis is prerequisite for selecting an alternative approach in accordance with available da...

The present study develops ArcMap models to implement the following three methods: FAO-56 Penman–Monteith (FAO PM), Hargreaves–Samani (HS) and Hansen, with former used as a reference. Moreover, implementing statistical indices (RMSD, MB, NMB) are also created. purpose is threefold, follows: investigate variability in daily mean reference evapotranspiration (ETo) for Decembers Augusts during 201...

We evaluated and compared the performance of simulated Angström-Prescott (AP) Hargreaves-Samani (HS) models on monthly annual timescales using generalized datasets covering entire West African region. The fitted AP model yielded more efficient parameters a = 0.366 b 0.459, whereas HS produced 0.216 coefficient based an timescale, which is suitable in region to coefficients recommended by Food A...