Calibration of reference evapotranspiration models in Pará

Abstract

The use of empirical agrometeorological models that can be adjusted to the climatic conditions of different regions has become increasingly necessary to improve water management in grain-producing municipalities. The aim of this work is to examine the correlation between various reference evapotranspiration (ETo) estimation methods and the standard FAO 56 Penman-Monteith method, as well as to determine correction factors, when necessary, for crop-producing municipalities in the northeast of Pará, during both the rainy and dry seasons. We compared simpler methods of ETo estimation to the FAO 56 Penman-Monteith method. For this purpose, meteorological data from Tracuateua, Bragança, Capitão Poço and Castanhal, provided by the National Institute of Meteorology (INMET), were used. The calibration of equations was performed through linear regression. The accuracy of different estimation methods was examined. The Turc, FAO 24 Blaney-Criddle and regression methods presented the best results for all statistical criteria; the Priestley-Taylor, Makkink and FAO 24 Radiation methods presented excellent results after calibration. The methods of Camargo and Hargreaves-Samani produced the worst results for all the criteria.

Agrometeorological and Agronomic Characterization of Megathyrsus Grasses Cultivated in Tropical Humid and Semi-Arid Conditions: A Multivariate Approach

“…The absence of wind speed and humidity data at the Igarapé-Açu meteorological station required that the ETo be calculated according to the method of Turc (1961), which represents an adequate estimate of the ETo for the region (Silva Júnior et al, 2017;Farias et al, 2019): where T mean is the mean between the maximum and minimum temperatures (°C) and R s is the solar global radiation (MJ m −2 day −1 ).…”

Knowledge, prevalence and seroconversion for hepatitis B in health professionals acting in a private clinic

“…When asked about some risk factors for acquiring hepatitis B, 3 (3.15%) reported sexual contact with a person with the infection and 75.0% (73) of the population reported not using condoms, which is a risk factor for exposure to hepatitis B and many other Sexually Transmitted Infections (STIs). Regarding sexual contact and exposure with HBV or HCV, around 55% of the people with a 'Yes' answer were under 40 years of age and could transmit and acquire the disease to/from their partners without having knowledge of this fact 21 .…”