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dc.contributor.advisorBecker, Vanessa-
dc.contributor.authorDiniz, Ingridh Savanna Medeiros-
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dc.description.abstractIn the Brazilian semi-arid region, many reservoirs are exposed to high evaporation rates and water deficit effects, causing a significant decrease in their water volume during the extended drought season, achieving to so low volumes that they become no longer sufficient to supply water, thus interrupting the water intake. The water depletion in the semi-arid region is becoming recurrent in some reservoirs, they remain dry for months or even years, causing problems for human consumption, animal feeds, besides to socioeconomic losses. After an event of water depletion, with the renewal of waters, it is believed that there are some improvements related to water quality: low levels of algal biomass, greater water transparency, lower turbidity and low concentration of nutrients. Therefore, the purpose of this study is to compare the before and after the reservoir is completely drought, identifying patterns of major water quality variables in response to reservoir volume fluctuations during a prolonged drought event. The studied reservoir was located at the municipality of Cruzeta, Rio Grande do Norte, Brazil. The work was carried out in two periods marked by rains below the annual historical average, characterizing a period of prolonged drought. The analyzed variables were transparency of the water, turbidity, conductivity, pH, organic and inorganic suspended solids, total phosphorus, dissolved reactive phosphorus and chlorophyll-a. The results indicated that after the renewal of waters, there was a tendency to improve the water quality in the Cruzeta reservoir, but did not present statistically significant changes in most of the limnological variables, thus remaining the water body, eutrophic and with high concentrations of nutrients.pr_BR
dc.publisherUniversidade Federal do Rio Grande do Nortepr_BR
dc.subjectEsgotamento hídricopr_BR
dc.subjectWater depletionpr_BR
dc.subjectSeca prolongadapr_BR
dc.subjectProlonged droughtpr_BR
dc.subjectFlutuação do nível d’águapr_BR
dc.subjectwater level fluctuationpr_BR
dc.titleA qualidade da disponibilidade hídrica do reservatório de Cruzeta na região semiárida tropical em evento de seca prolongadapr_BR
dc.contributor.referees1Figueiredo, Aline do Vale-
dc.contributor.referees2Moura, Caroline Gabriela Bezerra-
dc.description.resumoNa região semiárida brasileira, muitos reservatórios estão expostos à alta taxa de evaporação e aos efeitos do déficit hídrico, causando significativo decaimento no volume d’água dos reservatórios durante o período de seca prolongada, podendo chegar a volumes tão baixos que acarretam na interrupção da tomada d’água para abastecimento humano. O esgotamento hídrico na região semiárida vem se tornando recorrente em alguns reservatórios, permanecendo secos por meses ou até mesmo anos, causando problemas para o abastecimento humano, dessedentação de animais, além dos prejuízos socioeconômicos. Após um evento de esgotamento hídrico com a renovação das águas, acredita-se que haja melhorias com relação à qualidade da água, obtendo baixos níveis de biomassa algal, maior transparência da água, menor turbidez e baixa concentração de nutrientes. Portanto, o objetivo deste estudo é comparar o antes e depois de ter secado por completo o reservatório, identificando padrões das principais variáveis de qualidade da água em resposta às flutuações do volume do reservatório durante um evento de seca prolongada. O reservatório estudado foi o do município de Cruzeta, Rio Grande do Norte, Brasil. O trabalho foi realizado em dois períodos, marcados por chuvas abaixo da média histórica anual, caracterizando um período de estiagem prolongada. Foram analisadas as variáveis transparência da água, turbidez, condutividade elétrica, pH, sólidos suspensos orgânicos e inorgânicos, fósforo total, fósforo reativo dissolvido e clorofila-a. Os resultados indicaram que após a renovação das águas, houve uma tendência de melhoria da água do reservatório de Cruzeta, mas não apresentou mudanças estatisticamente significativas na maioria das variáveis limnológicas, permanecendo assim, o corpo hídrico, eutrofizado e com elevadas concentrações de nutrientes.pr_BR
dc.publisher.departmentEngenharia Ambientalpr_BR
Appears in Collections:Engenharia Ambiental

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