Results 31 to 40 of about 10,379 (196)

FAO-56 Penman-Monteith DailyETofrom Linear Regression Calibrated Hargreaves Equation with Wind Terms in Tropics with Limited Data [PDF]

International Journal of Agronomy, 2014
L'équation de Hargreaves (HG), qui n'a pas de terme de vitesse du vent (u2), a été modifiée, par une méthode d'étalonnage par régression linéaire, en LHGu qui au2termes. Le LHGu est effectivement une méthode simplifiée pour l'approximation de l'évapotranspiration de référence quotidienne (ETo) de l'équation de Penman-Monteith (FPM) FAO-56 sous les ...
openaire   +3 more sources

Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Métodos de estimativa da evapotranspiração de referência para as condições do semi árido Nordestino

Semina: Ciências Agrárias, 2011
The objective of this work was to evaluate methods of estimation of reference crop evapotranspiration (ETo) in conditions of low and high air relative humidity, using the Penman Monteith-FAO 56 method as reference.
Bruno Marçal de Almeida, Alexsandra Duarte Oliveira, Edmilson Gomes Cavalcante Junior, José Espínola Sobrinho   +3 more
doaj   +1 more source

Validation of the net radiation through sebal algorithm in different classes of land use and occupation in Rio de Janeiro

Bioscience Journal, 2016
The aim of this study was (a) to assess and evaluate the net radiation (Rn) by SEBAL algorithm and (b) to assess the net radiation (Rn) by the landscape's spatial temporal dynamic using ISODATA algorithm, in entire city of Rio de Janeiro.
Henos Carlos Knupler Jordão Lisboa, Iris Cristiane Magistrali, Rafael Coll Delgado, José Francisco de Oliveira-Junior, Givanildo de Gois, Paulo Eduardo Teodoro   +5 more
doaj   +3 more sources

Evapotranspiração de referência nos perímetros irrigados do estado de Sergipe Reference evapotranspiration in the irrigated perimeters of the state of Sergipe

Revista Brasileira de Engenharia Agrícola e Ambiental, 2010
O conhecimento da evapotranspiração de referência (ETo) é essencial no manejo de irrigação de culturas agrícolas em todo o mundo. Neste trabalho se utilizaram dados meteorológicos diários de evaporação do tanque "Classe A", temperaturas máximas e mínimas,
Inajá F. de Sousa, Vicente de P. R. da Silva, Fabiana G. Sabino, Antenor de O. A. Netto, Bruce K. N. Silva, Pedro V. de Azevedo   +5 more
doaj   +1 more source

Spatio-Temporal Variability and Trends of Penman-Monteith Reference Evapotranspiration (FAO-56) in 1971-2010 under Climatic Conditions of Poland [PDF]

Polish Journal of Environmental Studies, 2014
The trends of the seasonal (April-September) and monthly reference evapotranspiration time series were analyzed using linear regression. In addition, the trends of air temperature and sunshine hours also were investigated to show possible causes of the increase in reference evapotranspiration. The spatial variability of reference evapotranspiration was
Leszek Łabędzki, Bogdan Bąk, Karolina Smarzyńska   +2 more
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Comparison of different reference evapotranspiration (ET0) models and determination of crop-coefficients of french bean (Phesiolus vulgaris.) in mid hill region of Meghalaya

Journal of Agrometeorology, 2017
The water requirement and crop evapotranspiration (ETc)is determined using reference evapotranspiration (ET0) and crop-coefficient (kc). Numerous models are available for estimation of ET0,among which Penman-Monteith (FAO-56) model is considered to be ...
M. TAHASHILDAR, PRADIP K. BORA, LALA I. P. RAY, D. THAKURIA   +3 more
doaj   +1 more source

Calibration of alternative equations to estimate the reference evapotranspiration in Nova Venécia, Espírito Santo, Brazil

Agronomía Colombiana, 2023
The estimation of the reference evapotranspiration is fundamental in defining irrigation projects. However, an estimation using the standard equation requires climate variables that are difficult to measure and are not very accessible.
Gabriel Fornaciari, Rodrigo Amaro de Salles, Evandro Chaves de Oliveira, Mylena da Silva Gomes, Edinei José Armani Borghi, Marta Cristina Teixeira Leite, Ramon Amaro de Sales, Robson Prucoli Posse   +7 more
doaj   +1 more source

Evapotranspiração de referência nos períodos chuvoso e seco em Mossoró-RN

Semina: Ciências Agrárias, 2020
O município de Mossoró-RN é considerado uns dos polos fruticultores da região Nordeste. O município apresenta constante déficit hídrico, sendo necessário o desenvolvimento da agricultura irrigada com o uso eficiente da água, sendo fundamental o manejo ...
Anna Kézia Soares de Oliveira, Isaac Alves da Silva Freitas, Tecla Ticiane Félix da Silva, José Espínola Sobrinho, Rudah Marques Maniçoba, Wesley de Oliveira Santos, Joel Medeiros Bezerra, Saulo Tasso Araújo da Silva   +7 more
doaj   +1 more source

Performance of potential evapotranspiration models in Peninsular Malaysia

Journal of Water and Climate Change, 2021
Potential evapotranspiration (PET) is an important parameter for the operation of irrigation projects and water resources management. The globally recognized PET estimation model, the FAO-56 Penman–Monteith (FAO-56 PM) model, had been criticized for its ...
Ee Hang Goh, Jing Lin Ng, Yuk Feng Huang, Stephen Luo Sheng Yong   +3 more
doaj   +1 more source

Evaluation of Reference Evapotranspiration Equations under Current Climate Conditions of Egypt

Turkish Journal of Agriculture: Food Science and Technology, 2015
Precise estimation of the reference evapotranspiration is very important and vital in different fields such as agriculture, hydrology and meteorology. The aim of the current study was to evaluate the performance of different reference evapotranspiration ...
Gamal El Afandi, Mohamed Abdrabbo
doaj   +1 more source