Results 181 to 190 of about 21,247 (210)
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Using the Penman-Monteith Equation Predictively
Agricultural Water Management, 1984Abstract We consider the problem of calculating evaporation from vegetation which is sited away from a meteorological measurement station, or which is merely proposed. To use the Penman-Monteith equation for this task we must be able to predict, inter alia, the saturation deficit above the new vegetation A strategy for making such prediction is ...
K.G. McNaughton, P.G. Jarvis
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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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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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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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Comparing Net Radiation Estimation Methods: CIMIS versus Penman–Monteith
Journal of Irrigation and Drainage Engineering, 2007Net radiation ( Rn ) estimated using the California Irrigation Management Information System (CIMIS) Penman and the Penman–Monteith (PM) methods are compared using hourly data from July 17, 2004 to October 24, 2004. Results showed that differences between the two estimates get larger towards higher values of Rn because of the inability of the two ...
Bekele Temesgen +2 more
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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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Penman–Monteith reference evapotranspiration adapted to estimate irrigated tree transpiration
Agricultural Water Management, 2006The Penman Monteith equation as parameterized by the FAO-56 bulletin to compute grass reference evapotranspiration (E0, L ground m-2 d-1) was used to predict transpiration of irrigated orchard apple trees, olives, grapevines, kiwifruit and an isolated walnut tree.
Antonio Roberto Pereira +2 more
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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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An introduction to the hyperspace of Penman-Monteith reference evapotranspiration
International Journal of Hydrology Science and Technology, 2019This work had partial financial support of the Portuguese Foundation for Science and Technology (FCT) under the Strategic Project for the Centre of Territory, Environment and Construction of the School of Engineering, University of Minho, Portugal.
Haie, Naim +3 more
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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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