Navegando por Assunto "Rios"

Agora exibindo 1 - 8 de 8

Acesso aberto (Open Access)
Aspectos geoambientais e climáticos da sub-bacia do rio Guamá no Nordeste Paraense.
(Universidade Federal do Pará, 2020-12-15) BARBOSA, Ivan Carlos da Costa; VITORINO, Maria Isabel; http://lattes.cnpq.br/4813399912998401; https://orcid.org/0000-0003-3253-5301; SOUSA, Adriano Marlisom Leão de; http://lattes.cnpq.br/4371199443425884; https://orcid.org/0000-0002-2809-5318
The sub-basin of the Guamá River (SBGR) is located in the Mesoregion of the Northeast more specifically in the microregion of Guamá, covers 12 municipalities and has presented a relevant economic and social growth. The Guamá River has economic, social and cultural importance for the municipalities of the region, because for it converge all drainage network composed of small tributaries and large tributaries inserted. Thus, the objective of the research was to evaluate the integration of climate, environmental and water variables with the current transformations of land use and occupation in the area of the sub-basin of the Guamá River, in northeastern Pará. Initially, the estimates of precipitation derived from satellites (remote sensing) for the SBGR area were evaluated and the observations provided by the National Water Agency were compared. Then were mapped and evaluated the different uses and land occupations in the SBGR in order to establish environmental vulnerability from the relationship of physical and biotic elements and their ecodynamics. Finally, the dynamics of physical and chemical parameters of the surface water of the Guamá River were evaluated as a function of seasonal and spatial variability. It was concluded that the data provided by remote databases overestimated by 12% and 13% (CHIRPS and GPCC, respectively) the data observed by pluviometers. However, despite the overestimation of rainfall, it was possible to obtain reliable and satisfactory data from the databases by remote sensing. As for land use and occupation, there was a higher amount of area (57%) characterized as exposed soil and ground vegetation, and a lower amount of area (42%) characterized as dense or secondary vegetation cover. Thus, it was noted the occurrence of areas with high environmental vulnerability (northern portion represented by the urban centers of cities like Ourém and São Miguel do Guamá) and very high (southern portion) as a result of land use and occupation associated with anthropic activities. The areas classified as low or very low vulnerability (central and southern portion), less vulnerable to environmental degradation, were associated with the presence of vegetation cover composed of primary and secondary forest, and less human presence. As for the hydrochemical variables of the surface water of the Guamá River, high spatial heterogeneity was observed along the 12 sampling points, the existence of upward and downward trends in the upstream to downstream direction and the influence of the seasonality of the region. Finally, it is a priority that the results of this research promote benefits to the population of the various localities visited and serve as a guiding instrument for public policies aimed at the conservation of natural resources.
Acesso aberto (Open Access)
Contos de rios: memórias sobre as águas e o ensino de História em Santa Izabel do Pará
(Universidade Federal do Pará, 2020-12-15) RIBEIRO, Ligia Mara Barros; KETTLE, Wesley Oliveira; http://lattes.cnpq.br/9421187953739248; https://orcid.org/0000-0002-5824-5700
This study approaches the environmental perspective with emphasis on rivers in history classes. It aims to analyze the students' perception of the relationship between the Izabelense, Jordão and Caraparu rivers and the history of Santa Izabel do Pará, following the theoretical basis proposed by environmental history. Therefore we use oral history as a methodology to produce the izabelenses environmental memories from the speeches of the old residents, and through these, the students get to know the uses, relationships and social practices experienced between the subjects and the rivers, at the same time in which they analyzed the existing works on the history of the city, so that they understood what these authors said about rivers and nature or if they did not speak about them. So, as a product of this dissertation, was made the e-book Rivers' tales: izabelenses stories, in which the students in their writing and illustration of the stories used the environmental memories collected with the help of the information present in the works to point out the spaces they considered significant for the history of the place and thus write their texts that present new narratives about Santa Izabel do Pará, now including the rivers. With that, the students reflected on the environmental issues and crises existing in the place, leading the production of knowledge and, with the domain of this, developed their environmental awareness, being critical of the problems of the present in relation to water and rivers, being able to exercise the citizenship based on the issues reflected in their history classes.
Acesso aberto (Open Access)
Diagnóstico da contaminação ambiental gerada pela atividade minerária sobre os rios Sucio, Nico e Sinecapa – Nicarágua.
(Universidade Federal do Pará, 1995-05-19) SILVA VELÁSQUEZ, Gerardo Alfonso; FENZL, Norbert; http://lattes.cnpq.br/6834981018643186
Acesso aberto (Open Access)
Distribuição de metais pesados e hidrocarbonetos poliaromáticos em sedimentos de fundo dos rios Magdalena e Bogotá (Colômbia).
(Universidade Federal do Pará, 1997-09-08) PIRATOBA MORALES, Gundisalvo; FENZL, Norbert; http://lattes.cnpq.br/6834981018643186
Acesso aberto (Open Access)
Mineralogia, geoquímica, fertilidade e origem dos sedimentos de praia (Barra em Pontal) das bacias dos rios Purus e Juruá no estado do Acre.
(Universidade Federal do Pará, 2005-06-10) ALMEIDA, Henrique Diniz Farias de; COSTA, Marcondes Lima da; http://lattes.cnpq.br/1639498384851302
Acesso aberto (Open Access)
O quadrilátero cabano e as cabanagens nos Sertões da Amazônia: guerra, índios, rios e matas (1790-1841)
(Universidade Federal do Pará, 2023-09-18) BARRIGA, Letícia Pereira; RICCI, Magda Maria de Oliveira; http://lattes.cnpq.br/4368326880097299
This study covers indigenous participation in the Cabanagem Revolution. From a historical narrative, this thesis sets out to understand the Cabanagem Revolution that took place in Amazon backlands based on the indigenous protagonism around the actions of three ethnic groups, the Mura, the Munduruku and the Mawé. Inhabitants and masters of an immense area, the interfluve of the Madeira, Tapajós and Amazonas rivers, these indigenous people have printed their cultural marks with their arts of war and own interests, leading the cabanagem battles in the interior of the province towards increasingly radicalized directions, shaping their territory into a Cabano Quadrilateral. Through ancestral knowledge of forest, the indigenous people were able to act in an imperative way, determining in a large extent the advances and setbacks of the Cabanagem Revolution. In this sense, within a chronological arrangement, the thesis develops its narrative supporting its main argument that the Cabanagem lasted so long, leading to a process that was difficult to resolve due to its radicalization by the effective indigenous participation. Throughout the eight chapters the thesis is based, showing how indigenous actions from the second half of the 18th century, but especially 1790, and in the first two decades of the 19th century, went through a process of reworking their ways of opposing the colonial project. Thus, in the 1830s, their actions were radicalized, broking with the institutional channels of resolving their issues, and deciding for armed struggle, taking part in the civil war that broke out in Grão-Pará. Using the method of the indicative paradigm and the methodology of Ethnohistory, we located, through the traces left in the documentation, the indigenous evidence in the Cabanagem built in the Amazon backlands.
Acesso aberto (Open Access)
Territórios de uso comum na Amazônia: relação sociedade-natureza e modernização do espaço regional
(Universidade Federal do Pará, 2020-09-28) LIMA, Michel de Melo; TRINDADE JÚNIOR, Saint-Clair Cordeiro da; http://lattes.cnpq.br/1762041788112837
Taking as empirical references three cities located in the State of Pará (Tucuruí, Altamira and Marabá) and their respective immediate surroundings, impacted by infrastructure projects (hydroelectric, logistical and tourism projects) directly or indirectly associated with the water use, this doctoral thesis deals with common use territories in the Amazon, focusing on the life spaces and experiences of their subjects. The aim of the work is to analyze, in light of the principle of the commons, the appropriation of collectively used territories in the face of the process of modernization that results from the use of water resources for the purposes of infrastructure projects. It is argued that the process of modernization of space and the “enclosure” of the rivers’ waters and banks, occurred in the three realities in focus, ended up triggering contradictions, insurgencies and conflicts that result in resistances between local and regional social groups of different identities seeking to defend the rivers and other common use territories established by them throughout their history. To undertake the study, the following research methodological procedures were adopted: a) literature review of interdisciplinary critical theories and approaches that provide an understanding of the advance of neoliberal capitalism and the socially produced space in the Amazon in the contemporary period; b) survey and analysis of bibliographical sources on the history and geography of the three empirical realities in focus; c) primary and secondary data collection and analysis in documentary sources concerning the research topic; d) systematic field observation with inventory, comparison and analysis of landscape elements and their spatial and temporal dynamics; e) semi-structured interviews with subjects related to the common use of the territories, as well as with technicians/representatives of the municipal public administration. Based on the collected, systematized and analyzed data, it was found that the common use territories associated with the waters configure important references of life and constitute the spatialities of a significant portion of the regional population. This way, the process of modernization of space in the Amazon, along with the deterritorializations and reterritorializations unleashed through the capitalist use of the rivers and their banks, culminated in mobilizations and in the establishment of solidarities between socio-environmental movements and the various impacted population groups that collectively seek to affirm their sociospatial protagonisms. Such protagonisms are based on the recognition of the use values of their territories, whose protection is raised to the condition of a political principle representative of the urban and rural struggles in the current regional context.
Acesso aberto (Open Access)
Tide distortion and attenuation in an Amazonian tidal river
(2012-12) FREITAS, Paulo Tadeu Amorim; SILVEIRA, Odete Fátima Machado da; ASP NETO, Nils Edvin
The present study seeks to evaluate tidal propagation in the Guamá-Capim river system, in the Amazonian region, considering hydrodynamic and geomorphological aspects. Available data sets on fluvial discharge and water level variations were considered, besides several methods of measuring the tides (currents, water levels and discharges) recorded at different stations and in different periods. The main point argued is that fluvial discharge is the key-factor in tidal distortion and tidal bore formation in the system investigated, whereas the low relief of the area would be the main factor contributing to landward tidal incursion. The results show an impressive upward tidal incursion of more than 200 km, including substantial distortion -increasing upstream -of the tidal wave, of which the ebb phase lasts up to 5 hours longer than the flood, including higher flood current velocities as far as 161 km upstream. Generally, only hyposynchronous tidal response was observed. Seasonally, the fluvial discharge varies about 10 times in the Guamá and 4 times in the Capim River. The increase of the fluvial discharge results in an increasing distortion of the tide, besides a weak increase of the attenuation. During high fluvial discharge periods in conjunction with equinoctial tides (e.g. March-April), a tidal bore occurs in the system, also increased by the generally low relief. Therefore, the conclusions include: low relief and the distortion related to high fluvial discharges are the main factors controlling tidal propagation along the system and tidal bore formation. Furthermore, the system could be classified as a tidal river, in which massive regional fresh water input results in virtually non-existent salinity throughout the Guamá-Capim system.