2014
DOI: 10.1007/s12665-014-3809-1
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Evaluation and calibration of Blaney–Criddle equation for estimating reference evapotranspiration in semiarid and arid regions

Abstract: Penman-Monteith (FAO-56 PM) equation is suggested as the standard method for estimating evapotranspiration by the International Irrigation and Drainage Committee and FAO. On the other hand, the BlaneyCriddle (BC) temperature-based equation is an alternative and simple method compared with the FAO-56 PM equation. In the present study, the original coefficients BC equation (a and b) were calculated and calibrated spatial and temporal calibration at each station for each month based on the FAO-56 PM method for es… Show more

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Cited by 17 publications
(11 citation statements)
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“…The Hargreaves-Samani equation was used to calculate the modern AI used in this study 57 and therefore was also used for the future projections. It has been shown to perform nearly as well as the common FAO Penman method but requires substantially less parametrisation with more readily available data 62 . Future projected precipitation was then divided by modelled future potential evapotranspiration to provide future AI values across Australia.…”
Section: Methodsmentioning
confidence: 99%
“…The Hargreaves-Samani equation was used to calculate the modern AI used in this study 57 and therefore was also used for the future projections. It has been shown to perform nearly as well as the common FAO Penman method but requires substantially less parametrisation with more readily available data 62 . Future projected precipitation was then divided by modelled future potential evapotranspiration to provide future AI values across Australia.…”
Section: Methodsmentioning
confidence: 99%
“…The model provides a standard with which to compare the evapotranspiration capability under various climatic conditions, and it has been successfully applied at scales from a single basin to all of China Gao et al 2006;Heydari et al 2014;Meng and Mo 2012;Zhang et al 2007b;Zheng et al 2009). The Penman-Monteith ET 0 (Allen et al 1998) is calculated at daily scale according the following equation:…”
Section: Calculation Of Etmentioning
confidence: 99%
“…Among the numerous empirical methods to estimate ETo, nine models were selected that had the best performance under different climates on the basis of previous investigations [1,[46][47][48][49][50], and the results were compared with the FPM. ETo is the reference crop evapotranspiration (mm/day), R n is the net radiation (MJ/m 2 /day), G is the soil heat flux (MJ/m 2 /day), γ is the psychrometric constant (kPa/ • C), e s is the saturation vapor pressure (kPa), e a is the actual vapor pressure (kPa), ∆ is the slope of the saturation vapor pressure-temperature curve (kPa/ • C), T is the average daily air temperature ( • C), u is the mean daily wind speed at 2 m (m/s), H is the elevation (m), ϕ is the latitude (rad), T min is the minimum air temperature ( • C), T max is the maximum air temperature ( • C), RH is the average relative humidity (%), n is the actual duration of sunshine (hr), R s is the solar radiation (MJ/m 2 /day), R a is the extraterrestrial radiation (MJ/m 2 /day), λ is the latent heat of vaporization (MJ/kg), and C T , I, K T , a, b, P, a t , and T x are empirical coefficients Genetic algorithm (GA), genetic programming (GP), and gene expression programming (GEP) are different kinds of data-driven machine learning techniques to find an optimum solution for complex problems by artificial intelligence (AI).…”
Section: Methodsmentioning
confidence: 99%