IESA - Instituto de Estudos Socioambientais

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Navegando IESA - Instituto de Estudos Socioambientais por Por Orientador "Bayer, Maximiliano"

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    Análise ambiental integrada da paisagem na bacia hidrográfica do rio Araguaia
    (Universidade Federal de Goiás, 2022-03-10) Assis, Pâmela Camila; Bayer, Maximiliano; http://lattes.cnpq.br/4552593148328465; Bayer, Maximiliano; Silva, Elaine Barbosa da; Faria, Karla Maria Silva de
    The Araguaia river basin – the field of study of this research – is located in an ecological transition area between the two largest biomes in Brazil, the Cerrado and the Amazon, attributing to it, in effect, a state of continuous pressure from agricultural expansion, since the last decades, in order to threaten the integrity of the remaining natural area and the connectivity between these biomes. The Araguaia River is one of the main river in the Brazilian territory, and represents the only major river system in Central and Southern Brazil that has not yet been dammed or affected by other direct human interventions in the channel. Furthermore, it is also characterized as one of the few large free-flowing rivers in South America. The basin also has the important remnants of natural Cerrado vegetation, with important areas for biodiversity conservation, in addition to presenting a complex flood plain, which corresponds to one of the largest and most diverse floodplains in the world (Planície do Bananal) and is characterized by being the most geodiverse in the Cerrado. The paths for the development of this research center on the integrated environmental analysis of the landscape in the Araguaia river basin. Faced with this need, the study of landscape dynamics and geoprocessing techniques through Principal Component Analysis (PCA) were used as theoretical foundations. The construction of this integrated environmental analysis of the landscape involved the acquisition and spatialization of the following environmental data (land use and coverage, pivots, deforestation, fires, conservation units, biodiversity, hydroelectric, caves, quilombola communities, indigenous lands and settlements), considered as essential data for the integrated analysis of the landscape in the Araguaia river basin. Therefore, the interaction between landscape elements, under the approach of geoprocessing and Principal Component Analysis (PCA), made it possible to carry out the main correlations from the Principal Components (CP's) in the Araguaia River watershed in 2019, showingeffective for the study area. The Analysis by Principal Components showed that there was about 72% of the total variability of the data; of these, the categories of caves, endangered and endemic species, fires, hydroelectric, deforestation and conservation units showed more correlations. It is also worth noting that the remaining Savanna Formation areas are a priority area for conservation, as they represent the natural vegetation that comprises a large part of indigenous territories and conservation units, as well as the highest occurrence of endemic species in the hydrographic basin. However, this region, for 2019, represented the area with the highest rate of deforestation and number of fires.
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    Microclima em ambiente cavernícola: estudo da variação microclimática da caverna Lapa do Boqueirão, Vila Propício, GO
    (Universidade Federal de Goiás, 2021-05-10) Oliveira, Luciano Henrique Almeida de; Bayer, Maximiliano;  http://lattes.cnpq.br/4552593148328465; Bayer, Maximiliano; Barros, Juliana Ramalho; Momoli, Renata Santos
    The cave environments constitute one of the ecosystems of fundamental importance in nature, due to the great biodiversity of species found in these environments, the geological characteristics, the drainage patterns, the speleothems and the patrimonial, social and economic representativeness for the populations that live close to these areas (BUECHER, 1999; LINO, 2001). The understanding of the climatic aspects of caves is necessary for the generation of data that allow the atmospheric modeling of these environments, and the observation of the variables or characteristics found in the microclimate of caves. This is of great importance in the planning and management of natural resources, assisting in the management, planning and conservation of these environments (FREITAS, 2010). Resulting in an important tool to support research on cave environments. In most studies on cave environments, there is a strong presence of works related only to the geology of caves, denoting a lack of studies on the internal microclimatic processes of caves throughout Brazil (LOBO, 2010). The microclimatic scale comprises the atmospheric variations over the surface varying in height according to the aspects found in the landscape (MONTEIRO, 1990; MENDONÇA; DANNI-SILVA, 2007). Becoming the best scale for evaluating the cave atmosphere. Monitoring by means of thermohygrometers that store daily data, statistical analysis and comparison between graphs, allowed us to evaluate the microclimate in the cave Lapa do Boqueirão, located in the municipality of Vila Propício. State of Goiás. The acquired information revealed significant differences of the thermal variability of the cavity in relation to the external environment. Presenting circulation patterns and internal regulation mechanisms of thermal variability between environments that corroborate the characteristic specificities of a microclimate (LUETSCHER; LISMONDE; JEANNIN, 2008; LOBO, 2012). The results obtained in this research serve as support and contribution to studies conducted on the speleological landscape, especially those that consider the microclimatic parameters, and can assist in scientific analysis and decision-making of priority caves for conservation and preservation.
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    Mudanças na dinâmica e na morfologia fluvial com aplicação do método stream power no trecho do rio Araguaia entre a cidade de Itacaiú (GO) e Cocalinho entre 2010 e 2019
    (Universidade Federal de Goiás, 2020-10-14) Souza, Chrystiano Alves de; Bayer, Maximiliano; http://lattes.cnpq.br/5922031129551812; Bayer, Maximiliano; Zancopé, Márcio Henrique de Campos; Bueno, Guilherme Taitson
    This research was carried out in the stretch of the Araguaia river, covering the main course of the river between the cities of Itacaiú, Aruanã and Cocalinho, with the main objective of the research being the analysis of the evolution and the erosive / sedimentary morphological dynamics in the stretch defined in the middle basin from the Araguaia River, from 2010 to 2019, applying STREAMPOWER THEORY analysis models, for a period of nine years, based on remote sensing data and according to the methodology of Morais (2002). Along his journey, Morais carried out extensive research in 2002, in his master's dissertation, with the aim of quantifying and evaluating the morphological changes in the Araguaia River, in the 1960s and 1990s. In his research he proposed the analysis of attributes and features found along the river to map and identify the changes in the river that occurred during that period. One of the ways that Morais found to analyze the changes was the use of cartographic materials and satellite images to map the components of the river dynamics, later defined as morphometric and morphological environmental variables, active erosive and sedimentary processes, in order to diagnose, by means of of indices, the relationships between the erosive / sedimentary balance in the selected stretch. According to Morais, the results of these analyzes provide a diagnosis of the river's behavior through mathematical equations that make it possible to assess the intensity and predominance of these processes in the channel, but in a more in-depth analysis it was noticed that the methodology proposed by Morais achieves very beyond expected. However, the researches carried out using his method practically ended after his death in 2012, generating a period of approximately 22 years without data on the morphological alterations of the river that could be used to compare with the data obtained by him and to establish a historical panorama of the state of the Araguaia River. Thus, it was proposed to continue the application of its method in a section of the Araguaia river defined as segment 5, as it is the segment that borders the city of Aruanã, where intense changes in the main channel have been identified, the implementation of the cargo port. being an activity that generates many impacts on the morphology of the river, and because it is a stretch where other research by the author has already been carried out. To carry out this research, satellite images obtained in the years 2010 to 2019 were used, following the cartographic rigors in order to create a temporal retrospect with the Morais data and perform the Cartographic Reambulation of the data obtained from the Remote Sensing. But the research did not stop at these analyzes. With it, it was possible to determine an Equilibrium Relationship of the river, from the data obtained and the application of the Stream Power method, which analyzes the erosive potential of a channel or a river that naturally has a very intense dynamics, in the search to reach the balance and stability between erosive / depositional agents. According to what was expected and in accordance with the Morais data, the results showed an increase in sedimentary deposits, mainly in the parameter of lateral sand bars and a decrease in the quantity and areas of islands and remaining islands, which are being attached to the river plain. Indicating that in this stretch of the Araguaia River the sedimentary process is more active, especially in regions where it is at a more advanced stage.