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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Risco e impactos de poluiÃÃo nas Ãguas subterrÃneas pelo uso e ocupaÃÃo do solo no Porto das Dunas - Aquiraz/CE / Risk and impact of pollution in groundwater by use and occupation of the soil in Porto das Dunas - Aquiraz/CE

Karen Vendramini de AraÃjo 28 July 2014 (has links)
Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico / Este trabalho foi realizado no Porto das Dunas, no municÃpio de Aquiraz, CearÃ, com o objetivo de avaliar o risco e os impactos de poluiÃÃo nas Ãguas subterrÃneas, decorrentes do uso e ocupaÃÃo do solo. A metodologia de trabalho constou de pesquisa bibliogrÃfica, elaboraÃÃo do cadastro de poÃos e bases temÃticas, atualizaÃÃo do cadastro de poÃos prÃ-existente, obtenÃÃo de dados de pH, sÃlidos totais dissolvidos (STD) e condutividade elÃtrica (CE) em 32 poÃos, coleta de 15 amostras para anÃlises fÃsico-quÃmicas e bacteriolÃgicas e tratamento e integraÃÃo dos dados. O Porto das Dunas possui um turismo intenso, sendo densamente ocupado por casas de veraneio, hotÃis, resorts e empreendimentos turÃsticos. PorÃm, a Ãrea nÃo dispÃe de rede de abastecimento de Ãgua e nem rede de esgoto, sendo totalmente abastecida por Ãgua subterrÃnea e o despejo de esgoto realizado atravÃs de fossas sÃpticas ou negras. O AquÃfero Dunas à o mais importante na Ãrea de pesquisa tanto em ocorrÃncia (90%) quanto em potencial hÃdrico. Com base na metodologia GOD, o AquÃfero Dunas, na Ãrea de pesquisa, possui vulnerabilidade mÃdia a alta. A vulnerabilidade do AquÃfero Dunas associada a uma carga contaminante constante proveniente das fossas sÃpticas existentes na Ãrea representa um alto risco de poluiÃÃo das Ãguas subterrÃneas do Porto das Dunas. Os impactos decorrentes do uso e ocupaÃÃo do solo foram avaliados atravÃs do estudo qualitativo das Ãguas subterrÃneas da Ãrea de pesquisa realizado com base nos parÃmetros de pH, sÃlidos totais dissolvidos (STD) e condutividade elÃtrica (CE) obtidos em campo e anÃlises fÃsico-quÃmicas e bacteriolÃgicas. Verificou-se que as concentraÃÃes de pH, STD e CE encontram-se dentro dos padrÃes recomendados pela Portaria n 2914/2011 do MS. Jà as 15 anÃlises fÃsico-quÃmicas realizadas apresentaram concentraÃÃes de dureza, turbidez, fluoretos, sÃdio e nitrito dentro dos padrÃes de potabilidade e concentraÃÃes de cloretos (1 amostra), ferro (2 amostras) e nitrato (1 amostra) fora dos padrÃes de potabilidade. Em relaÃÃo à qualidade microbiolÃgica das Ãguas, verificou-se que 94% das amostras analisadas apresentaram coliformes totais ou fecais. A presenÃa de coliformes nas Ãguas subterrÃneas indica contaminaÃÃo oriunda das fossas domÃsticas existentes na Ãrea. / This work was performed at Porto das Dunas, in the city of Aquiraz, aiming to assess the risk and impacts of pollution in groundwater, resulting from the use and occupation of area. The methodology consisted of a literature search, preparation of records of wells and thematic bases, updating the register of pre-existing wells, obtaining data for pH, total dissolved solids (TDS) and electrical conductivity (EC) in 32 wells, collecting 15 samples for physicochemical and bacteriological analysis and processing and data integration. Porto das Dunas has an intense tourism, being densely occupied by homes, hotels, resorts and tourist developments. However, the area does not have a water supply and sewerage system, being fully supplied by groundwater and the disposal of sewage accomplished through septic cesspools. The Dunes Aquifer is the most important in the area of research both in occurrence (90%) and in water potential. Based on the methodology GOD, the Dunes Aquifer in the area of research, has medium to high vulnerability. The vulnerability of the Dunes Aquifer associated with a constant contaminant load from septic cesspools existing in the area is a high risk of groundwater pollution from Porto das Dunas. The impacts of the use and occupation were assessed using qualitative study of groundwater in the area of research performed based on the parameters of pH, total dissolved solids (TDS) and electrical conductivity (EC) from the field and physicochemical and bacteriological analyzes. It was found that concentrations of pH, TDS and EC are within recommended by Ordinance n 2914/2011 MS standards. Have the 15 physicochemical analyzes showed concentrations of hardness, turbidity, fluoride, sodium nitrite within the potability standards and concentrations of chloride (1 sample), iron (2 samples) and nitrate (1 sample) out of potability standards. In the microbiological quality of water, it was found that 94% of the samples showed total or fecal coliforms. The presence of coliforms indicates contamination in groundwater arising from existing domestic cesspools in the area.

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