Navegando por Autor "LIMA, Aline Maria Meiguins de"

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Acesso aberto (Open Access)
Aspectos texturais do magmatismo e tramas da tectônica impostas ao Granito Chaval na Zona de Cisalhamento Santa Rosa, extremo Noroeste da Província Borborema
(2014-12) GORAYEB, Paulo Sérgio de Sousa; LIMA, Aline Maria Meiguins de
The Northwestern region of Borborema Province features a wide variety of granitic bodies with diverse nature and tectonic evolution, since the Paleoproterozoic to Early Paleozoic, presenting higher incidence related to Neoproterozoic emplaced at different stages of Brasiliano (Panafrican) orogeny. One of these examples is the Chaval Granite representing a batholith body intruded in orthogneisses of Granja Complex and supracrustal rocks of Martinópole Group, outcropped near the Ceará and Piauí Atlantic coasts, Northeastern Brazil. The batholith is partly covered by Cenozoic coastal deposits and sedimentary rocks of the Paleozoic Parnaíba Basin. The Chaval Granite has a striking textural feature, which is represented by porphyritic highlighting microcline megacrysts in syenogranites and monzogranites, and many others textural/structural features of magmatic origin. They allowed interpreting the plutonic evolution at relatively shallow crustal level emplacement acting processes of fractional crystallization, magma mixing with intense magmatic flow, and gravitational force due to density difference of magma that lead to fluctuation of megacrysts of microcline and plagioclase in the residual magma, and accommodation of small bodies of leucogranite and pegmatites in the final stages of plutonic magmatic evolution of such plutonism. On the other hand, across the Eastern half of the pluton, there is a rich collection of shear structures related to the tectonic construction of the Santa Rosa Transcurrent Shear Zone, which led to tectono-metamorphic transformations superimposed on magmatic features that reached peak metamorphic conditions in the low amphibolite facies. Cartographically, three homogeneous structural domains were individualized, and each of them presents a variety of petrographic-structural features of the Chaval of igneous or tectonic nature. The plutonic rocks were deformed and progressively modified Eastward, in which the rocks change to darker gray, and comminution and dynamic recrystallization processes are reduced, as well as the coarse-grained granites are progressively, as well as the size of the phenocrysts to thinner dimensions, keeping their porphyroid characteristics, being accentuated the mylonitic features to achieve the main portion of Santa Rosa Transcurrent Shear Zone. As main structural features, there is the ondulatory extinction, cleavage and twining bending, twinning deformation, anastomosing foliation, badinage, S-C foliation, mineral stretching lineation, rotated and segmented crystals, lenticular, almondy or fish forms of porphyroclasts, pressure shadow, and ribbon quartz. The products of this shear deformation result in the formation of protomylonites, mylonites, and ultramylonites. These mylonite zones represent areas with the highest concentration of deformation that can gradually follow their textural and mineralogical changes, setting up a classic sequence of progressive heterogeneous deformation by simple shear in brittle-ductile and ductile conditions. The emplacement of Chaval Granite happened at the end of the Cryogenian (approximately 630 Ma) and can be interpreted as syn-tardi tectonic magmatism regarding the Brasiliano event. The process that generated the Santa Rosa Shear Zone resulted from lateral extravasation crustal masses in ductile flow took place in the final increments of deformation of a continental collision on an oblique thrust system, which built the Northwest Ceará Shear Belt, and happened at the end of Brasiliano (Panafrican) orogeny in Northwest Borborema Province.
Acesso aberto (Open Access)
Avaliação do desempenho ambiental e racionalização do consumo de água no segmento industrial de produção de bebidas
(2013-12) CAVALCANTE, Luciana Miranda; MACHADO, Luiza Carla Girard Teixeira; LIMA, Aline Maria Meiguins de
The Amazon region, with a high hydric potential, has attracted companies that require significant volumes of water; therefore, control instruments are necessary to monitor this trend. In this study, the degree of rationing of water use by beverage industries in Para state and the behavior of the sector are discussed. The subjects' variables were classified according to four study dimensions (environmental management, water management, wastewater management, and advanced measures for rationing) that compose the rationing level of water industrial management. The independent variables were associated by size, industry type, packaging used, water availability and the economic value of water. The data show that beverage production has a significant water footprint, higher than 15,250 m3/day, and that small industries have the highest relative consumptions (more than 7 L of water/beverage L). In general, the sector does not ration significant quantities of water; a better result was obtained for water management. However, some more efficient measures could be adopted, especially with regard to water reuse in cooling towers. Analysis of the variables shows that the rationing level is directly dependent on the size of the industry and on the type of product. Consumption tends to be lavish. In response to this situation, public policies should be prioritized to determine the water footprint of products and environmental cost should be considered in the overall cost of production.
Acesso aberto (Open Access)
Estudo da paisagem e o planejamento estratégico como bases da gestão da oferta hídrica no estado do Pará: discussão teórica e metodológica
(2009) LIMA, Aline Maria Meiguins de; PONTE, Marcos Ximenes
This article has as purpose discussing the water offers and preventive management using as methodological application the landscape study associated to the prospective analysis strategic. The chosen area was the Pará state (Capim river basin) drained by Amazonian and the Tocantins-Araguaia basins. The methodology application in Capim river basin showed that it´s necessary to process mechanisms able to work with a great number of landscape elements, their sensitivity aspects and with the most important actors involved to waters uses planning.
Acesso aberto (Open Access)
Floods and social vulnerability: study on the Xingu river in Altamira/PA
(Associação Nacional de Pós-Graduação e Pesquisa em Ambiente e Sociedade, 2018-03-11) FRANCO, Vânia dos Santos; SOUZA, Everaldo Barreiros de; LIMA, Aline Maria Meiguins de
The objective of this research was to classify the social vulnerability in Altamira-PA, considering the occurrence of seasonal floods and the future scenario of stabilization of the water level in the flood quota. The Social Vulnerability Index was determined by using fluviometric station data provided by ANA and socioeconomic variables from IBGE. The results indicate a moderate to low vulnerability that does not reflect the socio-spatial environment of the area, where the alert level of 6 m is recurrently exceeded during the floods of the Xingu river. The Belo Monte hydroelectric power plant will ensure the maintenance of the level of floods, which implies in the demand of urban planning that can reduce the liabilities generated by both the maintenance of wetlands, and for the extensive relocation of people, in addition by studies that assess the influence and consequence of extreme events in the region.
Acesso aberto (Open Access)
Modelagem Hidrológica Estocástica Aplicada ao Rio Tocantins para a Cidade de Marabá-PA
(Universidade Federal do Pará, 2016-03) CÂMARA, Renata Kelen Cardoso; ROCHA, Edson José Paulino da; PROTÁZIO, João Marcelo Brazão; QUEIROZ, Joaquim Carlos Barbosa; RIBEIRO, Wanda Maria do Nascimento; SIQUEIRA, Ionara Santos; LIMA, Aline Maria Meiguins de
Hydrology studies show that it is possible to avoid natural disasters through the proper use of hydrological forecasts. In this work we used the Box-Jenkins Methodology (Time Series Analysis) to model the daily level of the Tocantins river in the city of Maraba - PA, in order to predict floods caused by its regular increase, an event that usually puts the resident population of risk areas in vulnerable situations. For the study, we used the daily levels of data observed in gauged stations of Maraba and Carolina and Conceição do Araguaia National Water Agency (ANA), the period of 01/12/2008 to 31/03/2011. It was evident that the adjusted model was able to capture the dynamics of time series with good prognosis for a period of seven days with a maximum absolute error of 0.08 m and with precision in forecasting over 99%. The forecasting model showed good results and can then be used as support tools for Civil Defense, assisting in the planning and preparation of preventive actions for the city of Maraba.
Acesso aberto (Open Access)
Paisagem e percepção socioambiental em áreas de várzeas urbanizadas, Belém-Pará
(Universidade Federal do Pará, 2019-09) SANTOS, Viviane Corrêa; PIMENTEL, Márcia Aparecida da Silva; SADECK, Carla Cristina de Azevedo; LIMA, Aline Maria Meiguins de
The floodplains are important areas in the context of the Amazonian landscape. The urban occupation process, in its most recent history, has modified the dynamics of this unit especially in its hydrological system, which is now adapted to urbanization patterns. The bjective of this work is to discuss the proposals for urban planning in floodplain areas in the city of Belém (PA), based on the communities' perception of the process of landscape reconstruction. The methodological procedures used initially referred to the literature review on the concepts and technical materials used. Subsequently, questionnaires, with open and closed questions, were applied to residents living in these áreas. The results provided information for the compilation of cartographic material and emphasized the perception of social and environmental issues presented by the communities. For discussion of the data, the hierarchical analysis developed in the Expert Choice software was used. As a conclusion, it is considered that the technical instruments were of significant relevance to demonstrate the relationship between the answers obtained and led to the finding that, generally, urban planners still persist in proposing social projects that disregard the cultural diversity of the residents. It is emphasized that perception of the landscape expresses a whole social meaning that is only felt by those who live it and has its history as inheritance of life. Thus, management and planning actions should be incorporated into this logic, and it should be asked to what extent the maintenance of certain conditions does not increase the socio-environmental vulnerability of a community.
Acesso aberto (Open Access)
Riscos socioeconômicos e ambientais em municípios banhados pelos afluentes do Rio Amazonas
(Universidade Federal do Pará, 2017-10) COUTINHO, Eliane de Castro; ROCHA, Edson José Paulino da; LIMA, Aline Maria Meiguins de; RIBEIRO, Hebe Morganne Campos; GUTIERREZ, Lucy Anne Cardoso Lobão; BARBOSA, Ana Julia Soares; PAES, Gleicy Karen Abdon Alves; BISPO, Carlos José Capela; TAVARES, Paulo Amador
Municipalities in the Amazon are constantly affected by droughts and floods, and these socioeconomic and environmental risks mainly affect the local population. These precipitation extremes cause severe changes in rivers' hydrology, on both a temporal and a spatial scale. The intended objective of this study therefore was to determine the socioeconomic and environmental risk of municipalities affected by the tributaries and by the main channel of the Amazon River in relation to extreme precipitation events. We used monthly and annual precipitation data from 1982 to 2012 and social data from 2010 (urban, elderly, female and child populations, income and education level) for 47 localities in the Amazon Basin. We concluded that the risk was highest during flood events, particularly in smaller states (Acre and Roraima), and that vulnerability was greater in larger states (Amazonas and Pará). However, the population in the municipalities along the Amazon River have moderate to very strong socioeconomic and environmental risk because of the vulnerability associated with high urbanization and poverty, and threat of floods and droughts ranging from moderate to high.
Acesso aberto (Open Access)
Zoneamento da bacia hidrográfica do rio Moju (Pará): usos da água e sua relação com as formas de uso e cobertura do solo
(Universidade Federal do Pará, 2017-08) FERREIRA, Susane Cristini Gomes; LIMA, Aline Maria Meiguins de; CORRÊA, José Augusto Martins
The Moju River Basin presents different patterns of land use resulting from a historic expansion of the agricultural and extractive sector in the state. It is embedded in the area of developmental projects in the region, with emphasis on the palm oil productive chain. In the present work, a zoning of the Moju River Basin has been carried out, evidencing the interconnection between the land use and land cover and the water use, showing the pressures on the natural resources that the basin is undertaking. The zoning is a product resulting from the association between land use and land cover mapping, and the categories of water users of the municipalities that compound the basin. The results showed that the greatest water user grant has industrial purpose, with underground extraction massively than the superficial, where the palm oil industry has the highest water use grant. Only a small number of inhabitants are served by water distribution and there are high rates of loss in the distribution system. The Alto Moju sub-basin suffers high pressure on its natural resources. We noticed that the basin as a whole has most of its territory covered by forest, although pasture and secondary vegetation are also expressive. In general, we observed that the biggest challenge is to align the management of water resources and efficient land use.