Gestión integrada de recursos hídricos. Caso de estudio: evaluación de la calidad de agua de la microcuenca del río Pambay, ubicado en Puyo, cantón Pastaza

Abstract

Abstract: This study was conducted in the Pambay River micro-basin, located in the city of Puyo, Pastaza province. The objective was to evaluate water quality through quantitative physical-chemical and microbiological characterization to propose integrated water resources management (IWRM) strategies. Three consecutive sampling campaigns were conducted at three strategic points distributed in the upper, middle, and lower zones. A digital elevation model (DEM) and QGIS software were used for morphometric characterization of the micro-basin. A progressive deterioration of water quality was evident towards the lower zone due to anthropogenic activities. The Water Quality Index (WQI-NSF) showed "Good" quality in the upper and middle zones in the first sampling campaign and "Fair" in subsequent ones. Some parameters (color, oils and fats, BOD5, COD, lead, and fecal coliforms) exceeded the quality criteria established in Table 1 of the environmental standard (TULSMA). The surveys revealed public concern and willingness to participate in integrated management. It is recommended that sampling frequency be increased and wastewater treatment implemented.