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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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Impact of possible climate and land use changes in the semi arid regions: A case study from North Eastern Brazil
TL;DR: In this article, the authors combine hydrological observations and modelling results of a semi arid catchment in Brazil that could lead to a better understanding of the hydrology of similar catchments in semi-arid regions.
Journal ArticleDOI
Temporal pattern of aridity index in Iran with considering precipitation and evapotranspiration trends
TL;DR: In this article, the Kendall and Spearman tests with considering serial correlation effect were used for analysis of monthly and annual aridity index (IA), utilizing ratio of precipitation (P) over reference evapotranspiration (ETo), at ten stations located in critical agricultural regions in Iran.
Journal ArticleDOI
Responses of global terrestrial evapotranspiration to climate change and increasing atmospheric CO2 in the 21st century
Shufen Pan,Hanqin Tian,Shree R. S. Dangal,Qichun Yang,Jia Yang,Chaoqun Lu,Bo Tao,Wei Ren,Zhiyun Ouyang +8 more
TL;DR: In this paper, the authors used the Dynamic Land Ecosystem Model to estimate the global terrestrial evapotranspiration (ET) during 2000-2009 and project its changes in response to climate change and increasing atmospheric CO2 under two IPCC SRES scenarios (A2 and B1) during 2010-2099.
Journal ArticleDOI
The Influence of Precipitation Variability and Partial Irrigation within Grid Cells on a Hydrological Simulation
TL;DR: In this paper, the effects of natural and anthropogenic heterogeneity on a hydrological simulation are evaluated using a distributed biosphere hydrologogical model (DBHM) system, which embeds a biosphere model into a distributed hydrogrological scheme, representing both topography and vegetation in a mesoscale hierarchical simulation, and the model system includes an irrigation scheme.
Journal ArticleDOI
The dual crop coefficient approach to estimate and partitioning evapotranspiration of the winter wheat–summer maize crop sequence in North China Plain
Baozhong Zhang,Yu Liu,Di Xu,Nana Zhao,Lei Bo,Ricardo D. Rosa,Paula Paredes,Teresa A. Paço,Luis S. Pereira +8 more
TL;DR: In this paper, a study was developed aimed at estimating the ET c of winter wheat and summer maize crop sequence in the North China through eddy covariance measurements, to calibrate and validate the SIMDualKc model, to estimate the basal crop coefficients (K cb) for both crops and to partition ET c into soil evaporation and crop transpiration.
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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