Análisis de la calidad del agua a partir de la correlación entre variables fisicoquímicas y macroinvertebrados en tres sectores del río Caney, Restrepo – Meta

Abstract

The purpose of this work is to analyze the states of water quality from the correlation between physicochemical variables and the presence of benthic macroinvertebrates in three sectors of the Caney river, Restrepo - Meta. To know the conditions regarding its quality in which this water resource is found in these three selected points. The three sampling points along the river were chosen strategically taking into account the upper basin, middle basin, and lower basin, where variables were measured in situ (pH, temperature, conductivity, and dissolved oxygen) and ex situ variables (suspended solids total and COD5) and where the sampling for the collection of macroinvertebrates was carried out to be classified later in the laboratory with the help of the stereoscope. Average values for the ICA were obtained for point 1 of 0.84 of acceptable quality, for point 2 of 0.74 of acceptable quality and for point 3 of 0.69 of regular quality, average values of the BMWP were also obtained for point 1 of 34.8 of critical quality, for point 2 of 18.9 of very critical quality and for point 3 of very critical quality where the statistical analysis of ACP gave that they have a direct and high correlation between these two quality indices and the physicochemical parameter of dissolved oxygen. The result of BMWP gave such low values due to the small number of families found, possibly due to the presence of rapids, and despite the fact that a large number of non-sumo individuals were found since they belonged mostly to the Baetidae family, the results obtained from ICA they were more precise in this case for all three chosen sectors.