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A discussion on and alternative to the Penman–Monteith equation
Agricultural Water Management, 2009Abstract The Penman–Monteith (PMe) equation that estimates evaporation from leaf/canopy surfaces is based on a few approximations. Several authors discussed ensuing errors and suggested improvements. This paper reminds those discussions which ended in the early nineties.
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Accuracy of the Penman-Monteith Equation adjusted for atmospheric stability
Agricultural and Forest Meteorology, 1987Abstract The influence of atmospheric stability upon the Penman-Monteith equation when estimating maximum evapotranspiration from a whole wheat crop was investigated. A stability function based upon the Richardson number was used. It was measured over a short green grass surface and over the wheat crop.
W.H. Van Zyl, J.M. De Jager
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Non-dimensionalisation of the Penman-Monteith model
Journal of Hydrology, 1995Abstract The Penman-Monteith model is expressed in non-dimensional form. Scalings are selected such that the groups of dimensionless variables lie between minus one and plus one. The relative importance of each term in the equation is assessed from the size of the dimensionless parameters.
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Performance of Penman-Monteith FAO56 in a Semiarid Highland Environment
Journal of Irrigation and Drainage Engineering, 2010Reliable estimates of evapotranspiration are essential for irrigation and water resources planning and management. Although several methods are available for computing reference evapotranspiration ( ETo ) , the provision of complete and accurate climate data is often a problem.
Bogachan Benli +3 more
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Atmospheric Stability Effects on Penman-Monteith Evapotranspiration Estimates
Pure and Applied Geophysics, 2005This study explores surface-layer stability effects on the Penman-Monteith (P-M) method, one of the most widely used methods to estimate evapotranspiration (ET). Stability correction is applied to the original (neutral stability) formula by using atmospheric exchange coefficients developed by Louiset al. (1981). First, the effects of stability on the P-
Zekai Otles, W. J. Gutowski
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Using the Penman-Monteith approach to extrapolate soybean evapotranspiration
Theoretical and Applied Climatology, 1993Soybean evapotranspiration (ET) measured by the Bowen ratio energy balance method is used as the basis for the comparison of a commonly used semi-empirical (combination equation) and a pure statistical approach. Surface conductance within the combination equation was fitted to measured conductance by the Bowen ratio energy balance method.
L. Şaylan, Ch. Bernhofer
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Evaluation of the Penman-Monteith model for estimating soybean evapotranspiration
Irrigation Science, 2004The Penman-Monteith model with a variable surface canopy resistance (rcv) was evaluated to estimate hourly and daily crop evapotranspiration (ETc) over a soybean canopy for different soil water status and atmospheric conditions. The hourly values of rcv were computed as a function of environmental variables (air temperature, vapor pressure deficit, net
Ortega-Farias, S. +3 more
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A sensitivity analysis of the Penman-Monteith actual evapotranspiration estimates
Journal of Hydrology, 1979Abstract The evapotranspiration component, based on the Penman-Monteith equation, of the distributed Systeme Hydrologique Europeen (SHE) model of catchment hydrology is briefly described. The importance of evapotranspiration predictions to the operation of the model is stressed.
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Penman Monteith Crop Coefficients for Use with Desert Turf Systems
Crop Science, 2001Irrigation scheduling systems which estimate actual evapotranspiration (ETa) by adjusting reference evapotranspiration (ETo) with crop coefficients (Kcs) have been suggested as a means of improving irrigation management of turfgrass in the desert southwest. The objective of this study was to develop turfgrass Kcs for use with ETo computed by the Penman
Paul W. Brown +5 more
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Hargreaves versus Penman-Monteith under Humid Conditions
Journal of Irrigation and Drainage Engineering, 2007The Food and Agriculture Organization of the United Nations (FAO) has proposed using the Penman-Monteith equation as the standard for estimating reference evapotranspiration (ET 0 ), and for evaluating other equations. The basic obstacle to using the FAO-56 Penman-Monteith equation (FAO-56 PM) widely is the required weather data which are not available
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