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Crop evapotranspiration : guidelines for computing crop water requirements
Richard G. Allen,Luis S. Pereira,Dirk Raes,Martin Smith +3 more
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In this paper, an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients is presented, based on the FAO Penman-Monteith method.Abstract:
(First edition: 1998, this reprint: 2004). This publication presents an updated procedure for calculating reference and crop evapotranspiration from meteorological data and crop coefficients. The procedure, first presented in FAO Irrigation and Drainage Paper No. 24, Crop water requirements, in 1977, allows estimation of the amount of water used by a crop, taking into account the effect of the climate and the crop characteristics. The publication incorporates advances in research and more accurate procedures for determining crop water use as recommended by a panel of high-level experts organised by FAO in May 1990. The first part of the guidelines includes procedures for determining reference crop evapotranspiration according to the FAO Penman-Monteith method. These are followed by updated procedures for estimating the evapotranspiration of different crops for different growth stages and ecological conditions.read more
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Evaluation and development of temperature-based empirical models for estimating daily global solar radiation in humid regions
TL;DR: In this article, 14 existing temperature-based empirical models for daily horizontal global solar radiation estimation were comprehensively reviewed, and six new temperaturebased models (P1 P6) were developed for solar radiation estimator in humid regions.
Journal ArticleDOI
Comparative study of Hargreaves’s and artificial neural network’s methodologies in estimating reference evapotranspiration in a semiarid environment
TL;DR: In this paper, the authors compared the Hargreaves equation (HG) and ANN methods for estimating reference evapotranspiration (ETo) only on the basis of the temperature data.
Journal ArticleDOI
Comparing water input and water productivity of transplanted and direct-seeded rice production systems
TL;DR: In this article, the authors investigated the effect of crop establishment methods on irrigation input and water productivity in three irrigation service units (ISU) from 1988 to 1994 in the Muda Irrigation Scheme, Malaysia.
Journal ArticleDOI
Estimating evapotranspiration of European forests from NOAA-imagery at satellite overpass time: Towards an operational processing chain for integrated optical and thermal sensor data products
TL;DR: In this article, the authors used the Integral NOAA-imagery processing Chain (iNOAA-Chain) to measure the instantaneous spatial distribution of evapotranspiration (ET) values.
Reference Manual SWAP; version 3.0.3
J.G. Kroes,J.C. van Dam +1 more
TL;DR: SWAP as mentioned in this paper simulates vertical transport of water, solutes and heat in variably saturated, cultivated soils and is designed to simulate transport processes at field scale level and during whole growing seasons.
References
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Natural evaporation from open water, bare soil and grass
TL;DR: It is shown that a satisfactory account can be given of open water evaporation at four widely spaced sites in America and Europe, the results for bare soil receive a reasonable check in India, and application of theresults for turf shows good agreement with estimates of evapolation from catchment areas in the British Isles.
Journal ArticleDOI
On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters
C. H. B. Priestley,R. J. Taylor +1 more
TL;DR: In this article, the large-scale parameterization of the surface fluxes of sensible and latent heat is properly expressed in terms of energetic considerations over land while formulas of the bulk aerodynamic type are most suitahle over the sea.
Book
Water quality for agriculture
R. S. Ayers,D. W. Westcot +1 more
TL;DR: Water quality for agriculture, water quality in agriculture for agriculture as mentioned in this paper, water quality of agriculture, Water quality of water for agriculture in agriculture, مرکز فناوری اطلاعات و اسلاز رسانی
Journal ArticleDOI
The Interpretation of the Variations in Leaf Water Potential and Stomatal Conductance Found in Canopies in the Field
TL;DR: In this paper, the stomatal conductance of illuminated leaves is a function of current levels of temperature, vapour pressure deficit, leaf water potential (really turgor pressure) and ambient CO $_2$ concentration and when plotted against any one of these variables a scatter diagram results.
Book ChapterDOI
Yield response to water
TL;DR: In this paper, a methodology to quantify yield response to water through aggregate components which form the "handles" to assess crop yields under both adequate and limited water supply is presented, which takes into account maximum and actual crop yields as influenced by water deficits using yield response functions relating relative yield decrease and evapotranspiration deficits.
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On the Assessment of Surface Heat Flux and Evaporation Using Large-Scale Parameters
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