Results 41 to 50 of about 35,573 (203)

Alternative reference evapotranspiration methods for the main climate types of the state of Paraná, Brazil [PDF]

Pesquisa Agropecuária Brasileira, 2018
: The objective of this work was to define the best alternative methods for estimating the reference evapotranspiration (ETo) in the main climatic types (Cfa and Cfb) of the state of Paraná, Brazil.
Bruno César Gurski, Daniela Jerszurki, Jorge Luiz Moretti de Souza   +2 more
doaj   +1 more source

Correcting Hargreaves‐Samani formula using geographical coordinates and rainfall over different timescales

Hydrological Processes, 2023
AbstractThe United Nations Food and Agricultural Organization (FAO) approved the Hargreaves‐Samani formula (HAR‐85) as an alternative to the standard Penman‐Monteith method (FAO‐PM) for estimating grass reference evapotranspiration (ETo). With much less data demand, HAR‐85 is unequivocally useful where meteorological variables are often scarce ...
Elagib, Nadir Ahmed, Musa, Ammar Ahmed, Musa, Ammar Ahmed; 2 Environment, Health & Safety Department King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia   +2 more
openaire   +2 more sources

The Comparison of SEBAL Algorithm with SWAP Model and Computational Method to Determine Evapotranspiration [PDF]

علوم و مهندسی آبیاری, 2016
Accurate quantification of ET in irrigated agricultural lands is crucial for planning for water allocation, optimizing crop production irrigation management, evaluating the effects of changing land use on water yields.
Mostafa Yaghobzade, Zahra Izapanah, Saeid Broomand nasab, Hesam Seyed kaboli   +3 more
doaj   +1 more source

Estimation of ETo with Hargreaves–Samani and FAO-PM temperature methods for a wide range of climates in Iran [PDF]

Agricultural Water Management, 2013
a b s t r a c t Monthly data records of 40 Iranian stations distributed over the country, for the period 1971-2005, were utilized for estimation of reference evapotranspiration (ETo) using Penman-Monteith (PM-ETo), Hargreaves-Samani (HS) and FAO-PM temperature (PMT) methods.
Raziei, Tayeb, Pereira, L.S.
openaire   +2 more sources

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

Programa HS Cal para calibração da equação de Hargreaves-Samani

, 2019
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 ...
Sediyama, Gilberto Chohaku, Campos, Flavio Bastos, da Cunha, Fernando França, Ferreira, Lucas Borges   +3 more
core   +1 more source

EQUAÇÃO DE HARGREAVES-SAMANI CALIBRADA EM DIFERENTES BASES TEMPORAIS PARA SETE LAGOAS, MG [PDF]

, 2017
Dados de evapotranspiração de referência (ETo) são requeridos em diversas análises relacionadas ao uso de recursos hídricos, como no manejo de irrigação, balanço hídrico de sequeiro, manejo de bacias hidrográficas, etc.
Aline Lilian Marques Oliveira, João Carlos Ferreira Borges Júnior, Andrade, Camilo de Lelis Teixeira de, Pinheiro, Marcus André Braido, Marcus André Braido Pinheiro, Camilo De Lelis Teixeira de Andrade, Borges Júnior, João Carlos Ferreira, Oliveira, Aline Lilian Marques   +7 more
core   +1 more source

From Rare to Recurrent: Intensifying Hot–Dry Extremes Across Romania

International Journal of Climatology, EarlyView.
Romania has undergone a marked shift toward more frequent and spatially extensive compound hot–dry months since the 1990s, with persistent hotspots in the eastern Moldavian Plateau and the lower Danube–Bărăgan–Black Sea lowlands and comparatively buffered conditions at higher elevations.
Viorica Nagavciuc, Monica Ionita
wiley   +1 more source

Evaluation of empirical methods for estimating reference evapotranspiration in Central High Lands and Arid Western Lowlands of Eritrea

Journal of Agrometeorology
FAO Penman-Monteith (FAO56-PM) method remains difficult to implement across Eritrea due to severe shortages of standardized meteorological data. This study evaluated the accuracy of five alternative empirical methods by comparing them with the FAO56-PM ...
T. W. GHEBRETNSAE, E. S. MOHAMED, A. B. BOKRE, T. TESFAY, W. OGBAZGHI   +4 more
doaj   +1 more source

Catalogue of Global Land Soil Moisture Drought Events

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
We introduce the Global Land soil moisture Drought Event (GLDE) catalogue, identifying 755 GLDEs over the period 1980–2024 through a dynamic, spatiotemporal characterization. It reveals that extremely severe droughts are frequent in South America while Eurasia experiences the longest events.
Vojtěch Moravec, Jan Řehoř, Vít Šťovíček, Jan Balek, Rudolf Brázdil, Monika Hlavsová, Milan Fischer, Martin Hanel, Rohini Kumar, Oldřich Rakovec, Miroslav Trnka   +10 more
wiley   +1 more source