Trophic status and spatial variability of Río Tercero reservoir, Córdoba.

LEDESMA, CLAUDIA; BONATTO, FLORENCIA; BONANSEA, MATIAS; PROSPERI, CARLOS; RODRIGUEZ, CLAUDIA

BIOCELL

INST HISTOL EMBRIOL-CONICET

Lugar: Mendoza, Argentina; Año: 2008 vol. 32 p. 122 - 122

0327-9545

Ecological systems can be classified as oligotrophic, mesotrophic and eutrophic. This study was performed in the Río Tercero reservoir, in the province of Córdoba, Argentina. The aims were to determine the eutrophication degree and the concentration of chlorophyll-a in non sampled places and to predict alga flowering to prevent health risks. Samplings were done during spring-time in the years 2005 and 2006 coinciding with the pass of LANDSAT 5TM satellite over the study area. Temperature, chlorophyll-a, Secchi disk, total nitrogen and total phosphorous were determined both, in situ and in the laboratory. An analysis of simple lineal regression between the bands 2 and 4 and chlorophyll-a, was performed. The responses obtained were those estimated for the proposed models and the spatial distribution maps for that variable. The values predicted for that variable in both spring times were validated and compared. The trophic status corresponded to mesotrophic. The study demonstrated that the data provided by the LANDSAT 5TM images could be used to survey water quality parameters and to determine the spatial variability of chlorophyll-a.