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Abstract(s)
A água é um dos recursos naturais mais abundante no planeta e é essencial à vida, pelo que é fundamental a sua gestão e controlo de qualidade. A sua utilização depende das substâncias presentes na água, pelo que é necessário quantifica-las. A sua composição resulta de reações químicas ou de interações água-ar-rocha, sendo a sua composição química, segundo Likens (2010), atribuída a três fatores: físicos; geológicos e biológicos. Este estudo teve como objetivo a caracterização físico-química da água, em acordo com o D.L. 306/2007, que flui através das vertentes da Terra Quente e da Terra Fria com o propósito de diferenciar a água destas duas regiões.
Após uma análise aos resultados observa-se que as amostras da Terra Fria têm concentrações mais elevadas na maioria dos parâmetros analisados. Avaliou-se a variância entre a Terra Quente e a Terra Fria e verificou-se que existem diferenças significativas em alguns parâmetros, por exemplo, a alcalinidade com o valor-p = 0,014 e a dureza, valor-p = 0,032 (valor-p inferior a 0,05 indica que não existem diferenças significativas entre a Terra Quente e a Terra Fria). Existem ainda, diferenças no cálcio, magnésio, fosfatos e nitratos, muito devido à diferença da natureza dos solos e da temperatura verificados nas regiões estudadas.
Analisando os resultados obtidos é possível concluir que existem diferenças significativas entre alguns parâmetros estudados e também que a qualidade da água analisada, em média, é considerada boa.
Water is one of the most abundant resources on the planet and is essential to life, so it is essential it’s management and quality control. It’s use depends on the substances present in the water, and it is necessary to quantify them. Its composition is the result of chemical reactions or interactions of air-water-rock, and its chemical composition, according to Likens (2010), is attributed to three factors: physical, geological and biological. This study aimed to physicochemical characterization of water, according to DL 306/2007, which flows through the strands of the Terra Quente and Terra Fria in order to differentiate water from these two regions. After analyzing the results it was observed that the samples of the Terra Fria have higher concentrations in most of the analyzed parameters. Evaluating the variance between the Terra Quente and the Terra Fria found that there are significant differences in some parameters, for instance, the alkalinity p-value = 0.014 and hardness, p-value = 0.032 (p-value less than 0.05 indicates that there are no significant differences between Terra Quente and Terra Fria). There are also differences in calcium, magnesium, phosphates and nitrates, due to the very different nature of the soil and the temperature recorded in the regions studied. Analyzing the results, we conclude that there are significant differences between some parameters studied and also that the water quality, in average, is considered good.
Water is one of the most abundant resources on the planet and is essential to life, so it is essential it’s management and quality control. It’s use depends on the substances present in the water, and it is necessary to quantify them. Its composition is the result of chemical reactions or interactions of air-water-rock, and its chemical composition, according to Likens (2010), is attributed to three factors: physical, geological and biological. This study aimed to physicochemical characterization of water, according to DL 306/2007, which flows through the strands of the Terra Quente and Terra Fria in order to differentiate water from these two regions. After analyzing the results it was observed that the samples of the Terra Fria have higher concentrations in most of the analyzed parameters. Evaluating the variance between the Terra Quente and the Terra Fria found that there are significant differences in some parameters, for instance, the alkalinity p-value = 0.014 and hardness, p-value = 0.032 (p-value less than 0.05 indicates that there are no significant differences between Terra Quente and Terra Fria). There are also differences in calcium, magnesium, phosphates and nitrates, due to the very different nature of the soil and the temperature recorded in the regions studied. Analyzing the results, we conclude that there are significant differences between some parameters studied and also that the water quality, in average, is considered good.
Description
Keywords
Água Caracterização Qualidade Terra Fria Terra Quente