Dissertações em Engenharia de Barragem e Gestão Ambiental (Mestrado) - PEBGA/NDAE/Tucuruí
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/9396
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Dissertação Acesso aberto (Open Access) Mapas de inundação em área urbana na cidade de Araguaína/TO: estudo de caso da interferência da CGH Corujão(Universidade Federal do Pará, 2022-02-25) SANTANA, Leonardo Moreira; SILVA, Adriano Frutuoso da; http://lattes.cnpq.br/3321059172343690; https://orcid.org/0000-0003-1710-8862The habitation occupation in the area of influence of CGH (hydroelectric power station) - Corujão is quite significant, however, there is an imminent risk of flooding in the area, a factor that motivated the development of the study, to understand the real risks incident on the area. Therefore, this work aimed to analyse the impacts of the CGH Corujão dam reservoir in the urban area of the city of Araguaína/TO. A data collection and characterization of the Neblina stream, which flows into the CGH reservoir, were carried out to understand how the occurrence of high levels of rain causes the stream to overflow and increase the risks of flooding in an urban area, being calculated the maximum rainfall. With these data, a simulation was performed using the HEC-RAS program, which led to the generation of flood maps. Regarding the impacts of the dam reservoir in the urban area of the city, it was possible to observe that it has little influence in the flood areas, according to the maps obtained from the aplicativo HEC-RAS. From the results it was possible to verify that most of the maps presented risks to human life and structural damage. These data show that it is an area of vulnerability to floods and, consequently, to life, health, infrastructure, economy and socioeconomic development. The estimated contributions of the study involve the population and the government. The identification of areas of greater vulnerability in terms of failures and collapses of masonry structures, essential information for the development of a master plan in which these areas of greater risk are excluded from use for housing, commerce, services and other activities. With access to the full risk map, the city has the possibility to develop future housing programs so that the existing structures are deactivated and companies, residences, services and others are directed to other areas, with safety and guarantee of rights. Urban planning, in activities such as drainage studies, needs this information so that they can be developed in an assertive and effective way, benefiting the public administration, by avoiding damages that need to be corrected and require resources, in addition to improving the infrastructure of services and making the daily life of citizens safer. The civil defence, in possession of the data obtained, can develop support programs for the residents of the region, issue risk alerts more broadly in the face of the forecast of intense rains and floods, allowing individuals who are in these areas to seek more safe for these moments of risk. With this study, it is possible to define risk reduction approaches that guarantee more health for the population, reduce the demand for resources for health care after the floods, as well as reduce the occupancy of beds for the sick and injured due to the floods. In view of the above, it appears that the benefits are numerous, both for the population and for the public administration, with a reduction in expenses and costs to the public coffers, in addition to a greater guarantee of preservation of the life and patrimony of individuals who, in the present, live in areas of high vulnerability.Dissertação Acesso aberto (Open Access) Análise dos efeitos da detonação na estabilidade de talude em mina de ferro no Quadrilátero Ferrífero em Minas Gerais(Universidade Federal do Pará, 2022-08-03) AZEVEDO, Daniel Prado; MARQUES, Eduardo Antonio Gomes; http://lattes.cnpq.br/6725413897416818; ALENCAR JÚNIOR, Júlio Augusto de; http://lattes.cnpq.br/3663658632717465The vibrations induced by blasting in mining are finite waves that can disrupt geotechnical structures. For the present research, seismographs were installed in various positions along a slope with approximately two hundred meters of difference in height from the bottom of the pit to the top, in order to analyze the speed and acceleration of the particles at the moment of the wave transmission and their consequences to the stability of rocky mass. It is known that the course of these vibratory oscillations causes the particles to move and then return to the equilibrium state. Therefore, it is important to study which waves were generated in the detonation and their behavior in the lithology covered. A slope in the selected mine, Vale S.A. property, was analyzed, which is composed mostly of phyllite and quartzite, sometimes continuous, sometimes discontinuous, as there is a fractured zone of N / S orientation that extends from the top of the slope to its base. In this context, there are at least 3 fracture directions that act as an escape zone for groundwater, constituting a geotechnical problem of material disaggregation, resulting in great erosion. The vibrations induced by the detonations of explosives in the mine can increase the erosion condition when they propagate through the fractured area. The highest seismographic reading obtained among the seismographs was used in this study and the evaluation of the reduction in the safety factor of selected sections was carried out. Later, the maximum value for vibration in which the slope remains stable is also calculated, on Slide2 software. The evaluation of the results on the slope Allowed the interpretation of the effects of vibrations on the slopes reduced between 4.1% and 4.8% the values of the safety factors and shows that the lower the slope safety factor, the greater this interference from the vibration in the stability of the structure. A difference equal to 8% was observed when comparing the section with the highest Safety Factor and the one with the lowest Safety Factor.Dissertação Acesso aberto (Open Access) Proposições para o fortalecimento da educação ambiental na área de influência da UHE Tucuruí: sob o olhar da percepção ambiental de docentes do ensino fundamental(Universidade Federal do Pará, 2023-06-29) TEIXEIRA, Thaise Daniele Paixão; ROCHA, Gilberto de Miranda; http://lattes.cnpq.br/2436176783315749The study examines environmental perception considering the construction of the Tucuruí Hydroelectric Power Plant, which led to a series of spatial, social, and environmental changes within the project's affected area. This transformation altered the human-nature relationship and individuals' perception of their environment. The research aims to contribute to the strengthening of public policies, particularly within the framework of measures designed to mitigate the impacts of hydroelectric plants. This will be achieved through an analysis of the Environmental Perception of public school teachers involved in the environmental education program of the Tucuruí Hydroelectric Power Plant within its scope of influence. The study is conducted across six schools situated in the municipalities of Tucuruí and Breu Branco, involving a total of 60 teachers and 6 administrators as participants. Data collection involved semi-structured interviews with school administrators and open-ended questionnaires directed to teachers. Quantitative data were systematically processed and organized, with results depicted in graphs. Qualitative data were analyzed using content analysis, aided by the IRaMuTeQ Software. The outcomes of this investigation revealed that the majority of participants possessed knowledge about the educational initiatives aimed at raising awareness about the Environmental Education Program (AEP) of the Tucuruí HPP. However, despite acknowledging the program's limitations, most teachers believe that the AEP contributes to mitigating environmental degradation in the vicinity of the Tucuruí HPP. Nevertheless, it is imperative to critically examine the socio-economic and cultural context of the communities, identifying potential issues before implementing activities. This entails considering the diverse environments and historical ties of those affected by the project. Consequently, investing in and intensifying the program's presence within the school environment becomes essential. This underscores the need for enhanced training and program adjustments that foster meaningful learning and the development of environmentally conscious citizens.