Evaluación de la calidad del agua mediante el uso del índice de contaminación (ICOMO) y su relación con el índice biológico (BMWP/Col) en el caño seco, Restrepo Meta

Abstract

The community of macroinvertebrates are also known as biological indicators of water quality. The investigation was carried out in Caño Seco, located in Restrepo-Meta, during the months of July, September and October of 2018. The index of contamination of organic matter (ICOMO) and the biological index BMWP / Col, were evaluated. Thus, as well as the relationship of the physical, chemical and bacteriological variables with the changes in the diversity of the macroinvertebrate community in the sampling stations along the channel, in each one of them was fixed in a segment of 100 meters long for the collection of aquatic macroinvertebrates with a type "D" network identified up to the family taxonomic level. Likewise, water samples were taken for analysis of 9 variables among physicists, chemists and bacteriologists. In total, 4510 specimens belonging to thirty-two families, three orders and five classes were quantified. The variables that present most of the variation are total coliforms, DBO5-20°C, DQO. By means of a canonical correspondence analysis (CCA) the environmental variables that obtained the greatest relationship with the community of aquatic macroinvertebrates were: total coliforms, DQO, and DBO. The organisms of the families Chironomidae and Baetidae were more tolerant to the conditions of contamination by organic matter, having a close relationship with the variable of total coliforms, while the organisms of the family Empidae and Coenagranidae. Prior to the finalization of the document it is reduced to the socialization of the results to the community and the municipality to have as objective the implementation of improvement strategies for the actors involved