Evaluación de la eutrofización y variabilidad vertical de las concentraciones de nutrientes en la Laguna de Colta

Abstract

In the objective of this study, it was determined the Eutrophication and vertical variability of the concentrations of nutrients in the Colta lagoon and identify the environmental aspects that influence the quality of the water. It was made a distribution of the lagoon in 16 monitoring points using the Zigzag method to obtain data on the depth of the lagoon performed by Manual Bathymetry that consists of an anchor attached to a 6-meter tube that serves to measure the depth and a GPS to know the coordinates of each point. Water samples were taken at 3 depths with the Van Dorn equipment, with a volume of 2 liters and mechanical seal, brand Widco Instruments model: 3-1120-G45 to analyze its vertical variability and nutrient concentration. Physicochemical parameters were measured in situ such as PH, Temperature, and Turbidity at each point. In the ESPOCH Water Quality laboratory analyzes of Electrical Conductivity, Phosphates, Nitrates, Nitrites, Sulfates, Total Nitrogen, Total Solids, Sedimentable Solids, Carbon Dioxide, Carbonates, Bicarbonates, and Dissolved Oxygen was performed. For the statistical analysis the Average and the ANOVA the statistical method was used for the variability of nutrients, through the Leopold matrix the aspects that most affect water quality are agriculture and livestock, it was obtained that the ICA in the rainy season is 6107.9 and in the dry season it is 5966.6 and there is no Nutrient Variability at different depths between the rainy season and the dry season. It is concluded that according to Carlson's equation in the Rainy and Dry season, the Colta lagoon is in the Eutrophic and Mesotrophic state. It is recommended to select more sampling points to obtain data in greater quantity and to corroborate the research.