Programa de Pós-Graduação em Engenharia de Barragem e Gestão Ambiental - PEBGA/NDAE/Tucuruí
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/9395
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Navegando Programa de Pós-Graduação em Engenharia de Barragem e Gestão Ambiental - PEBGA/NDAE/Tucuruí por Orientadores "FÜLBER, Heleno"
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Item Acesso aberto (Open Access) Análise da cobertura do solo usando NDVI, na região da hidrelétrica de Belo Monte, estado do Pará - Brasil(Universidade Federal do Pará, 2019) CARRARO, Fábia Gabriela Pflugrath; FÜLBER, Heleno; http://lattes.cnpq.br/5018616409948511The present work aims to analyze the ground cover, of the Belo Monte Dam complex region using NDVI (Normalized Difference Vegetation Index), calculated from TM / Landsat 5 and OLI / Landsat 8 images from 2008 to 2018. The use of images over the 10-year period can continuously identify trends in the pixels due to the change in land use. The mapping consisted of a polygon (buffer) on each side of the Xingu River, the images obtained during the dry period, in the Imaging Division of the United States Geological Survey (USGS). The scenes were processed and the thematic maps generated in ArcGIS® 10.2.2. and the NDVI tool was applied for the mapping of areas and then a grid was generated with the processed values, than the creation of thematic classes based on intervals of index values, for the generation of thematic images, with associated defined value intervals to a color scale. The reduction in NDVI values in the years 2008, 2009, 2016 and 2017 shows the direct influence of the decrease in vegetation due to deforestation. It is checked that during the time series, that from 2013 to 2016 there was a constancy in the NDVI values, indicating that in those years there were no major losses of plant biomass. Thus, the application of the index shows an efficiency when analyzing the behavior of the vegetation made it possible to verify a huge loss of plant biomass and increase of exposed soil due to the implantation of the Belo Monte Dam.Item Acesso aberto (Open Access) Desenvolvimento de uma plataforma de hardware e software livres para monitoramento remoto e instrumentação de barragens(Universidade Federal do Pará, 2019-08-09) BEZERRA, Ábner Cézar Santos; GOUVEIA, Fernanda Pereira; http://lattes.cnpq.br/1772072130947378; FÜLBER, Heleno; http://lattes.cnpq.br/5018616409948511This work aims to develop a pilot project of an online Monitoring System for implementation in dam instrumentation, using a platform and free software. The research methodology was carried out in 6 stages, as follows: the literature review; the selection of the development board; the development of a data logger; the development of an application for analog sensor reading; the implementation of the Monitoring System in a controlled environment and the implementation of the Monitoring System in the field. Finally, the conclusions obtained with the elaboration of this research were: the chosen development board, the ESP8266, had a satisfactory performance, being able to be programmed by the Arduino development environment, besides having wifi connection, which allowed the construction of a Data Logger that uses a wireless network, with IP addressing for data presentation. The application created, developed in IDE Android Studio, had satisfactory answer, being able to log in the IP address of the Data Logger, and present the user, in real time, the results on screen. Controlled environment tests were performed to verify the response of a pressure sensor, and in the field, where it was possible to obtain trend curves in each of these environments with great precision, however, by comparing the curves obtained with the curve. standardized calibration, only the convergence of the readings values up to the value of the head height equal to 3 mca was observed, whereas values of head height of 3 to 6 m.c.a. demonstrated approximately 1% dispersion from the standard curve and readings above 6 m.c.a. presented dispersion greater than 5%. This was only possible to identify because the application has a sampling period of 800 milliseconds, thus ensuring a reading in practically real time.