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| TOMAR, ARVIND SINGH. |
| In this study, performance of three forms of Valiantzas ET0 equations namely, (i) requiring full meteorological dataset, (ii) not requiring wind speed data, and (iii) not requiring both wind speed & relative humidity data for Indian semi-arid Hissar and Parbhani districts in comparison to widely accepted FAO-56 PM model was evaluated in terms of different statistical indices and their ranking based on GPI values. All Valiantzas ET0 equations requiring full meteorological dataset under-estimated FAO56-PM estimates in the range of 9.10 to 21.84% at Hissar while they over-estimated it in the range of 0.98 to 8.32% at Parbhani district. Valiantzas equations not requiring wind speed data under-estimated FAO56-PM ET0 values in the range of 3.90 to 34.56%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Valiantzas equations; Reference evapotranspiration; Semi-arid; Hissar; Parbhani; India. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6651 |
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| Flumignan,Danilton L.; Rezende,Maiara K. A.; Comunello,Eder; Fietz,Carlos R.. |
| ABSTRACT Net radiation (Rn) of reference surface is important information that has many applications, but its measurement is rare due to the high cost of the sensor and the complexity involved on the measurement. Therefore, estimate Rn from another variable is desirable, as from solar radiation (Rs); however, standard methods used are complex, making interesting the use of simplified methodologies. Considering these aspects, the present study aimed to set two empirical methods to estimate Rn from Rs for Dourados region, Mato Grosso do Sul, Brazil. One method was based on mathematical modeling (Gauss Method). The other one was a more simplified and practical approach (Practical Method) comprising the determination of fixed monthly conversion factors. It was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Weather station; Gauss Method; Practical Method; Reference evapotranspiration. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000100032 |
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| Ferreira,Lucas Borges; Cunha,Fernando França da; Sediyama,Gilberto Chohaku; Campos,Flavio Bastos. |
| Abstract: The objective of this work was to develop a software (HS Cal) to calibrate the Hargreaves-Samani equation for specific periods of the year, in global, seasonal, and monthly time scales, as well as to compare the performance of calibrated and non-calibrated equations. The software was developed in order to use raw data provided by Banco de Dados Meteorológicos para Ensino e Pesquisa (BDMEP). All calibrations outperformed the original Hargreaves-Samani equation, especially with the use of seasonal and monthly calibrations. The HS Cal software can easily calibrate the Hargreaves-Samani equation, allowing the identification of the best form of this equation for a given site. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agrometeorology; Irrigation; Local calibration; Minimum data; Reference evapotranspiration; Simplified models. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000100902 |
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| Azevedo,Benito M. de; Fernandes,Carlos N. V.; Vasconcelos,Denise V.; Garcia,Amparo C.; Figueredo Júnior,Luis G. M. de; Viana,Thales V. de A.. |
| ABSTRACT The objective of this study was to evaluate the effect of different irrigation depths on productive performance and yield response of zucchini (Cucurbita pepo L.). A field trial was carried out in the experimental area of the Meteorological Station of the Federal University of Ceará, CE, Brazil. The experimental design was randomized blocks, with six treatments and four replicates. The treatments adopted were: 30, 60, 90, 120, 150 and 180% of the reference evapotranspiration (ETo), estimated by Penman-Monteith (EToPM) and applied by drip irrigation. Fruit weight, number of fruits, fruit length, fruit diameter, pulp thickness, soluble solids and yield were analyzed, as well as water use efficiency (WUE). The methodology proposed by FAO Bulletin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucurbita pepo L.; Irrigation management; Reference evapotranspiration. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600401 |
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