bachelorThesis
Determinación del estado ecológico de las lagunas: Quilotoa, Yambo y del Lago San Pablo, utilizando fotogrametría y concentración de clorofila
Fecha
2022-09Autor
Bonifaz Damian, Lenin Alberto
Institución
Resumen
The present study was carried out in the lagoons of Quilotoa, Yambo located in the province
of Cotopaxi, and Lake San Pablo located in the province of Imbabura, which have presented for
years problems of contamination and environmental impacts generated by tourism activities carried
out in the area. Therefore, this study seeks to determine the ecological status of the different lentic
aquatic ecosystems, using photogrammetry and chlorophyll concentration.
To achieve the objective, two types of research were carried out. Field, in which high
resolution images were taken by aerial photogrammetry and water samples were collected in 20
different points of each ecosystem at depths of 0.20 - 0.40 and 0.60 meters, during the months of
January, February and March. The experimental research was carried out in the Instrumental
Laboratory of the Salesian Polytechnic University where the chlorophyll concentration was
determined by the trichromatic method.
The results obtained show a chlorophyll concentration of 9.61 mg/m3, 13.67 mg/m3 and
19.30 mg/m3 for the Quilotoa, Yambo and San Pablo Lake lagoons, respectively, determining a
very good ecological status. It was also determined by means of the Carlson index that these lentic
aquatic ecosystems are eutrophic, presenting a large amount of nutrients where algae proliferate and
present a lower amount of animal and plant species. To develop the model we worked with linear
regressions generated with the chlorophyll concentration and the values of the red band of the RGB
images, obtaining the following results of R2 0.8391; 0.9523 and 0.9528, RSME 0.07; 0.66 and 0.89
of the Quilotoa, Yambo and San Pablo Lake Lagoons respectively, allowing us to conclude that it is
possible to generate an estimation model of chlorophyll concentration, being a parameter used to
determine the ecological status of aquatic ecosystems.