Banca de DEFESA: EWELYN REGINA ROCHA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : EWELYN REGINA ROCHA SILVA
DATE: 27/10/2020
TIME: 09:00
LOCAL: laboratorio de agrometeorologia (defesa virtual)
TITLE:

ESTIMATION OF EVAPOTRANSPIRATION THROUGH THE SURFACE ENERGY BALANCE ALGORITHM FOR LAND – SEBAL, IN EASTERN AMAZON

KEY WORDS:

irrigated agriculture, radiation balance, Landsat-8.

PAGES: 95
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Agrometeorologia
SUMMARY:

Irrigated agriculture is considered to be the sector that most consumes the available water resources. To properly irrigate in order to minimize water losses, studies are needed to increase the efficiency of water use in the agricultural sector. One of the alternatives is to accurately estimate evapotranspiration (ET), which is an important element of the hydrological cycle and the energy balance on the Earth's surface. The aim of this study was to estimate the actual daily evapotranspiration through the implementation of the Surface Energy Balance Algorithm for Land -SEBAL algorithm, in eastern Amazonia. We used six images captured by the sensors OLI/TIRS on Landsat 8 in the following dates: November 20, 2017; December 22, 2017; May 31, 2018; June 7, 2018; June 26, 2019 and August 29, 2019. The performance of the algorithm was obtained in comparison with field data from the micrometeorological tower implanted in a commercial acai plantation area (Euterpe oleraceae M.). The results were satisfactory when observing the values of mean absolute error, mean relative error, root of the mean square error and agreement index of energy flows (with the exception of heat flow in the soil) and evapotranspiration, with the capacity to distinguish different types of ground cover, demonstrating the sensitivity of the model, which provided the elaboration of the spatial distribution of the components of the energy balance and evapotranspiration. The evapotranspiration estimates with the algorithm showed good agreement with the results obtained by the Bowen ratio method in the area of açaí plantation. This will make it possible for the SEBAL model to be used as one of the methods to assist in decision making regarding the management of irrigation in cultivated areas, reducing energy costs and especially water losses.

BANKING MEMBERS:
Presidente - 1356961 - PAULO JORGE DE OLIVEIRA PONTE DE SOUZA
Externo ao Programa - 3158799 - JANNAYLTON EVERTON OLIVEIRA SANTOS
Externo à Instituição - MARCOS ADAMI - INPE
Externo à Instituição - MARCOS ANTONIO VANDERLEI SILVA - UNEB