Estudio de la influencia de la morfología del Embalse Salve Faccha en su estado trófico actual

Abstract

The present project includes an analysis of the relationship between the morphology of the Salve Faccha reservoir with its trophic status and its evolution, using information recorded in periodic monitoring carried out by the EPMAPS during the 2007-2017 period. The study includes a bathymetric survey carried out by the RiverSurveyor M9 echosounder. With this information we proceed to calculate of the surface and subsurface morphometric parameters of the reservoir. Additionally, a characterization of the physic-chemical of the water is performed: temperature, pH, conductivity and dissolved oxygen; and the collection of samples for analysis of: total phosphorus, total nitrogen and chlorophyll a. The comparison of the updated bathymetry with the last available record, allowed us to know that by 2017 the volume of the reservoir has been reduced by 3%. On the other hand, the results obtained from the analysis of water quality, processed with the Modified Trophic Status Index (IETM) of Toledo Jr. and the criteria of the Organization for Economic Cooperation and Development (OECD), allow to estimate a state eutrophic of the reservoir. Finally, an equation is proposed to determine the volume of water collected as a function of the height of the reservoir, as a tool for operational purposes.