Análise de parâmetros limnológicos e elementos químicos na qualidade da água de um córrego sul mato-grossense

Abstract

Aquatic ecosystems are being increasingly impacted by human actions, and consequently water bodies are being exposed to the carrying of sewage, urban, industrial and agricultural waste. This impact can determine aquatic environmental imbalance, implying a reduction in the supply of natural resources such as habitats, thus resulting in the reduction of local biodiversity. In this sense, the present work aimed to evaluate the water quality of water body, through the limnological parameters and analysis of chemical elements and the use and occupation of the soil. For this purpose, three sampling points (P01, P02 and P03) were selected in the São José stream (Dourados-MS) where the characterization of land use and cover, analysis of limnological parameters (temperature, dissolved oxygen, conductivity, pH, total dissolved solids, turbidity, alkalinity, hardness, ammonia and nitrite) and analysis of chemical elements (Aluminum, Barium, Cadmium, Chromium, Iron, Magnesium, Molybdenum, Lead, Zinc, Arsenic, Calcium, Cobalt, Copper, Potassium, Manganese , Phosphorus and Selenium). The criteria for assessing water quality were based on the Brazilian legislation CONAMA 357/2005 for water body class 3. It was observed in the study that the level of dissolved oxygen, aluminum and phosphorus found in the water are not within the maximum allowed values by legislation. This fact can be explained by the existence of a large proportion of agricultural areas and a reduced area of vegetation around this water body, mainly as noted in point 3. Given this, we can conclude the need to preserve areas of more dense vegetation, taking into account seen a more voluminous and closed forest around the water bodies in order to mitigate the impacts caused by human activities.