Dissertações em Recursos Hídricos (Mestrado) - PPGRH/IG
URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/10533
Navegar
Navegando Dissertações em Recursos Hídricos (Mestrado) - PPGRH/IG por Orientadores "MATTA, Milton Antônio da Silva"
Agora exibindo 1 - 5 de 5
- Resultados por página
- Opções de Ordenação
Item Acesso aberto (Open Access) Análise da susceptibilidade a inundações na bacia hidrográfica do Rio Uraim, Paragominas - PA(Universidade Federal do Pará, 2017) CORREA, Denison Lima; MATTA, Milton Antônio da Silva; http://lattes.cnpq.br/9053359402276755The phenomenon of flooding is a natural event, given by the extravasation of water to the greater river bed, a fact caused by intense precipitation causing the amount of water that arrives simultaneously to a point of the river is greater than its capacity of flow. The main objective of this dissertation was to analyze the susceptibility to floods in the Uraim River basin in the municipality of Paragominas state of Pará, based on the physical and morphometric characteristics of the basin and to evaluate the areas most prone to flooding within the urban zone. Geoprocessing techniques were used to extract the basin by SRTM images and to use digital image classification to obtain soil use in the basin and extraction of elevation and slope to compose the map algebra process by the AHP method in order to generate the map susceptibility of the basin and conduct a discussion with the urban area of the municipality of Paragominas. The Uraim River basin It has a drainage network with area and perimeter of 4,981 km² and 202 km, respectively. The basin has a maximum altitude of 255 meters and a minimum of 1 meter in the exudation, the average altitude being 136 meters. The slope of the main watercourse calculated on the basis of the extremes (S1) showed a value of 0.08 m/m expressed a value that overestimates the mean slope of the water course, and hence the peak flood. For the variable use and occupation of the soil present variables where it can be analyzed that the Uraim river basin is in the process of altering its vegetation cover, evidencing a high index in the pasture and agriculture classes, besides the deforestation in Permanent Preservation areas, the areas evidence of high impermeability in the preservation areas. It can be seen that the neighborhoods most susceptible to flooding are in regions near the river basins of the basin: Promissão, Uraim, Cidelândia, Angelim and Cidade Nova. The AHP technique used to determine the weights of classes contributing to flood susceptibility was effective because it reduces and simplifies the proposed problem, which minimizes the errors of judgment during the process.Item Acesso aberto (Open Access) Avaliação da capacidade de autodepuração da bacia do Tucunduba(Universidade Federal do Pará, 2018) SILVA, Andréa Maria Alves Gomes da; MATTA, Milton Antônio da Silva; http://lattes.cnpq.br/9053359402276755The existence of organic matter in a watercourse results in the consumption of dissolved oxygen. This is due to the processes of stabilization of the organic matter made by the bacteria decomposers, which use the oxygen available in the liquid medium for their respiration. The decrease in the concentration of dissolved oxygen has several implications from the environmental point of view, constituting one of the main problems of water pollution. In view of this problem, this work aims to know the behavior of the autodepuration phenomenon in the Tucunduba River Basin in Belém-PA using the Streeter-Phelps model.Item Acesso aberto (Open Access) Qualidade da água do Rio Pericumã e sua relação com ocupação urbana em Pinheiro - MA(Universidade Federal do Pará, 2017) GOMES, João Nilson Silva; MATTA, Milton Antônio da Silva; http://lattes.cnpq.br/9053359402276755The research was developed from September / 2015 to February / 2017 and had the objective of diagnosing and analyzing the waters of the Pericumã River in the city of Pinheiro-MA, under physico-chemical and microbiological aspects, essentially important in the characterization of water quality supply and homes. The collections were monthly at three points along the river. The analyzed parameters were: temperature, conductivity, pH, turbidity. Microbiological parameters were: total coliforms, thermotolerant bacteria and Escherichia coli. According to the results obtained it is concluded that there is a seasonal variation of the water quality of the Pericumã river in the physical-chemical parameters. Brazilian urban environments are characterized by the progressive concentration of the population, configured by a disorderly and accelerated growth that causes significant impacts on the environment, with actions that are not committed to the natural, sociocultural and urban aspects of their landscapes. Above all, due to inappropriate and improper appropriations of space for urban occupations. The landscape is subject to intense environmental fragility due to significant changes in morphogenesis, as occurs in the city of Pinheiro - MA, which represents a regional center in the center of the Maranhense Bay, where about 60% of the population lives in the urban environment of the municipality. In view of this, this research has the purpose of diagnosing the areas with socioenvironmental fragilities, of floodplain areas and urban perimeter.Item Acesso aberto (Open Access) A qualidade das águas subterrâneas da cidade de Salvaterra, Marajó - Pará(Universidade Federal do Pará, 2017) RIBEIRO, Ronaldo Pimentel; MATTA, Milton Antônio da Silva; http://lattes.cnpq.br/9053359402276755The present study verified the quality of groundwater in the city of Salvaterra located in the island of Marajó-Pará. The registration of 20 wells (18 tubular and 2 amazons) was carried out in five neighborhoods of the region (Caju, Centro, Paes de Carvalho, Marabá and Coqueirinho) In order to present results about the hydrogeological characteristics, physicochemical and microbiological analyzes, the samples were collected in two seasonal periods, being in the months of April (rainy period) and November (less rainy period). The main objective of this research was to outline an overview of the groundwater situation of the 20 registered wells used by the population of Salvaterra. The hydrogeological characterization of the study area was based on the descriptive analysis of four wells with 80 meters of depth of COSANPA. The results obtained were a lithologic composite profile, a composite lithologic section, a three dimensional model of hydroestratigraphy, a section composed of the geometric aspects of aquifers, two static level diagrams and two three dimensional models of seasonality. To determine the groundwater quality, the following parameters were analyzed: temperature, pH, electrical conductivity, turbidity, total dissolved solids, dissolved oxygen, total hardness, alkalinity, ammonia, nitrate, chloride, iron, fecal coliforms and total coliforms. For the analysis of the COSANPA water treatment system, free chlorine was included. The results obtained were compared with the potability standards, according to Ministry of Health Ordinance nº 2.914. For the interpretation of the results, 12 charts of variation of values and 12 maps of isovalues and isoteores were elaborated in the seasonal periods. The pH was considered acid with maximum value of 5.9. The hardness presented soft, moderate and hard degrees in the CaCO3 composition of the groundwater. The chemical contaminations presented in the nitrate values reached 74% of the contaminated wells in the rainy season and the iron values with high concentrations in the COSANPA wells up to 3.5 mg/L. The microbiological contaminations were manifested by the presence of fecal coliforms (Escherichia coli) and total coliforms. During the rainy season, the presence of Escherichia coli was detected in 63% of the wells studied and 89% in total coliforms. In the less rainy period, Escherichia coli and total coliforms were present in 21% and 47% of the wells respectively. The results of these analyzes confirm a higher degree of contamination of nitrate, and of fecal and total coliforms of these groundwater, prevailing in greater amounts of the rainy season.Item Acesso aberto (Open Access) Qualidade das águas subterrâneas rasas do bairro Centro do município de Marituba - PA e sua relação com as principais fontes potenciais de poluição(Universidade Federal do Pará, 2017) ROCHA, Ádria Lorena Galdino de Almeida; MATTA, Milton Antônio da Silva; http://lattes.cnpq.br/9053359402276755The water crisis is one of the most important social problems of the current decade. Surface water sources are increasingly polluted and groundwater is assuming an important role in human supply. The objective of this work is to analyze the shallow groundwater quality and the geometry of the flows of these waters in the central area of the Marituba district to show their relation with the potential sources of pollution. For this purpose, nineteen groundwater samples were collected from shallow wells in the central district of the municipality of Marituba. Thirty physico-chemical parameters including fifteen heavy metals were analyzed. From the results, tables, graphs and maps of isovalores distributed in the studied area were elaborated. The analyzed waters showed physical and chemical qualities that are not recommended for human consumption. Two parameters are particularly important in this context. The pH values show that, in the rainy season, about 95% of the samples showed pH values outside the drinking water range of Ordinance 2914/11 / MS. While, for the less rainy period, 79% of the samples showed pH values outside the limits of the Ordinance. Fieldwork has shown a great lack of basic sanitation in the area and the discharge of open sewage that can interact through surface runoff with underground springs. Acidic pH values can lead to corrosion in pipes and gastric diseases in humans and are therefore not suitable for human consumption. The other parameter with content above the recommendations of Ordinance 2914/11 / MS is nitrate, with 63.15% of the analyzed samples showing values above 10mg/L. This characterizes these waters as unfit for human consumption and is interpreted as evidence of contamination by liquid effluents (mainly domestic sewage) in the surface waters that interact with the groundwater, added to the presence of septic tank and lack of basic sanitation. All this is added to a shallow static level in these areas, often less than 5 meters and sometimes sub-outcropping. The Piper diagram was constructed and it showed that these waters are characterized as calcium bicarbonated. The study of groundwater flows allowed to identify the influence of potential sources of pollution of the area, with emphasis on a chemical industry existing in the southwest sector of the area. For public supply it is suggested to construct deeper wells that exploit water from confined aquifer units. For this, an alternative water supply proposal for the population of Marituba is presented at the final cost of m³ or 1000 liters of groundwater of R $ 0.124.