Planteamiento de una metodología para el cálculo de un índice de calidad del agua para el río Machángara, cuenca alta del Guayllabamba

Abstract

The objective of the project is to develop a methodology for the calculation of a water quality index (WQI) for the Machángara river, located in the upper basin of the Guayllabamba, within the DMQ, applying descriptive statistics, correlations and multivariate analysis. The study was carried out with the data provided by the EPMAPS from monthly monitoring campaigns in the Machángara river during the years 2002 - 2007 in seven monitoring stations. For this, the database of physical-chemical and bacteriological parameters was consolidated, using descriptive statistical tools and agglomerative hierarchical clustering analysis (CA) for the grouping of similar stations. For the selection of WQI variables, statistical criteria were combined (analysis of main components and factor analysis), bibliographic research and analysis of applicable national regulations. Then the model for the calculation of the WQI was selected, with which the quality of the river was assessed. Finally, the adapted ICA was evaluated applying sensitivity analysis and comparing it with the WQI of the NSF of the United States. An ICA consisting of nine variables was obtained, under the model of the Canadian Council of Ministers of the Environment (CCME), adapted to the region of study.