Banca de DEFESA: DANIEL JUNQUEIRA DE MORAIS MUNHOZ

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : DANIEL JUNQUEIRA DE MORAIS MUNHOZ
DATA : 16/04/2021
HORA: 09:00
LOCAL: meet.google.com/aub-vsdp-ijk
TÍTULO:

APPLICATION OF REMOTE SENSING TO ESTIMATES WATER DEMANDS AND WATER CONSUMPTIONS IN CENTRAL PIVOTS OF SOYBEANS PLANTION

PALAVRAS-CHAVES:

NDVI, culture coefficient, soy cultivation, water consumption, irrigation, central pivots.

PÁGINAS: 96
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Engenharia Hidráulica
ESPECIALIDADE: Hidrologia
RESUMO:

In Brazil, monitoring of river flows is historical, there is a relative knowledge of water availability, however knowledge of water withdrawals is unusual. It is essential to reconcile supply management with demand management to guarantee access to water, especially in regions of conflict over water use. In Cerrado region in western Bahia, irrigation by central pivot method is one of the most used and plays a fundamental role in food production and socioeconomic development. In the past decade, there has been a significant increase in the irrigated area and a decrease in water availability; thus, knowledge of the flow demanded for irrigation is essential for the management and sustainable growth of irrigated agriculture. In this sense, the general objective of this work is to propose a methodology to estimate water consumption in central pivots from the NDVI and water balance. The model uses weather station data to obtain reference evapotranspiration (ETo), and NDVI to calculate the crop coefficient (NDVI). To validate the method, results of potential evapotranspirations of crop (ETp) and irrigation depths were compared, calculated by remote sensing, with those of Irrigation Management Reports of 12 central pivots, from SAMA farm in Luís Eduardo Magalhães, during soybean harvests from 2018 to 2020. From 10 equations, the equation proposed by (RAFN, CONTOR and AMES, 2008) was chosen, which best adjusted for water demand calculation for soybeans, with no statistical difference for α = 0.05. In estimating the volume of water used in irrigation, the methodology proved to be effective for α = 0.01. It was possible to establish culture coefficients by remote sensing, with an initial Kc of 0.37, Kc in development phase of 0.68, Kc in critical phase of 1.09 and Kc in maturation phase of 0.68. The average volume, in three harvests, of water consumption in irrigation of soybeans was 2,545,410 m³, calculated by remote sensing, 2,317,525 m³ being constant in our Reports. The proposed methodology presents itself as an adequate tool to subsidize Demand Management, in order to provide certain water security in food production, income generation and jobs and to mitigate risk of conflicts over water use.

MEMBROS DA BANCA:
Presidente - 2466669 - MAURO JOSE ALIXANDRINI JUNIOR
Interno(a) - 3362965 - PATRICIA LUSTOSA BRITO
Externo(a) à Instituição - EVERARDO CHARTUNI MANTOVANI - UFV
Externo(a) à Instituição - IEDA DELŽARCO SANCHES - INPE