Determinación de calidad de agua en el Lago Vichuquén, con imágenes de satélite Landsat 8, sensor OLI, año 2016, Chile

Abstract

<p>Trophic structure deterioration in continental water bodies (lakes and damps) has been a growing problem during the last years. Numerous factors, either natural or man-made contribute in value increments of various water quality indexes ranging toward eutrophication. Our study had objective to use remote sensing as complementary tool to study the spatial distribution and dynamics of Lake Vichuquén water quality parameters in two seasons of 2016 through the use of two satellite images of the Landsat 8 OLI sensor, with in situ and laboratory data. The Chl-a and Z<sub>SD</sub> parameters were estimated from multiple linear regression models. The results indicate that the trophic state of Lake Vichuquén corresponds to a eutrophic level in summer and mesotrophic in autumn. The laboratory analyzes establish for the summer and autumn season that the Chl-a data oscillate between 14.1 and 5.5 μg/l and for the Z<sub>SD</sub> between 3.7 and 2.5 m respectively. The increase in the levels of eutrophication of Lake Vichuquén is influenced in the first place by the seasonality and secondly by the different land uses that accelerate this type of processes; such as the plantations of radiata pine and eucalyptus, the agricultural activities and the urban areas surrounding the lake. The mean square error for each variable and each season varied in Chl-a in summer and another year 0.74 and 0.01 µg/l and Z<sub>SD</sub> 0.16 m respectively.</p>

Retrieving Water Turbidity in Araucanian Lakes (South-Central Chile) Based on Multispectral Landsat Imagery

“…Several studies have been carried out to estimate water quality parameters such as chlorophyll a (Chl-a) and turbidity in various aquatic ecosystems using remote sensing reflectance [12][13][14]. The spatial distribution and dynamics of several water quality parameters in Chile were investigated by [15] in Lake Vichuquén lake, and Panguipulli lake by [16]. Recently, ref.…”

Ciências Biológicas e da Saúde: Investigação e Prática II

“…El uso de técnicas de percepción remota en otros lagos chilenos, ha sido aplicada para el lago Vichuquén en la zona central de Chile (34 º S) en que se logró encontrar una amplia variabilidad espacial en la concentración de clorofila la que estuvo fuertemente correlacionada con propiedades espectrales de Landsat 8 OLI (Briceño et al, 2018).…”

Aplicación de sensores remotos para el análisis de cobertura vegetal y cuerpos de agua

“…En Chile, Briceño et al (2018), con el uso de la teledetección (imágenes satelitales del sensor OLI de Landsat8), realizaron el estudio de la distribución espacial y la dinámica de los parámetros de calidad de agua del lago Vichuquén-Chile durante el año 2016. Hicieron recolecciones de muestras de campo y mediciones in situ, análisis en laboratorios y procesamientos de imágenes satelitales.…”