Proposal of a water-quality index for high andean basins: application to the Chumbao river, Andahuaylas, Peru

• Autores: Choque Quispe, David, Froehner, Sandro, Palomino Rincón, Henry, Peralta Guevara, Diego E., Barboza Palomino, Gloria I., Kari Ferro, Aydeé, Zamalloa Puma, Lourdes Magaly, Mojo Quisani, Antonieta, Barboza Palomino, Edward E., Zamalloa Puma, Miluzka M., Martínez Huamán, Edgar Luis, Calla Florez, Miriam, Aronés Medina, Edgar G., Solano Reynoso, Aydeé M., Choque Quispe, Yudith
• Formato: artículo
• Fecha de Publicación: 2022
• Institución: Universidad Nacional José María Arguedas
• Repositorio: UNAJMA-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.unajma.edu.pe:20.500.14168/738
• Enlace del recurso: https://hdl.handle.net/20.500.14168/738; https://doi.org/10.3390/w14040654
• Nivel de acceso: acceso abierto
• Materia: Delphi method; Chumbao River; heavy metals sub-index; high Andean water-quality index; organic matter sub-index; physicochemical sub-index; http://purl.org/pe-repo/ocde/ford#1.05.11

Thewater fromthe high Andean rivers is peculiar due to its composition and the geomorphology of its sources, and naturally or anthropogenically contamination is not discarded along its course. This water is used for agriculture and human consumption, therefore knowing its quality is important. This research aimed to proposing and formulate a water-quality index for high Andean basins through the Delphimethod, and its application in the Chumbao River located in Andahuaylas-Peru. Forty-three water-quality parameters were evaluated through the Delphi method, and the water-quality index (WQIHA) was formulated with a weighted average of the weights of the selected parameters, it was compared with the WQI Dinius. For this purpose, ten sampling points were considered along the Chumbao River located between 4274 and 2572 m of altitude and theWQIHA was applied. In addition, field and laboratory analyses were carried out in 2018, 2019, and 2021, in dry and rainy seasons. Twenty parameters were grouped in the physicochemical sub-index (SIPC), heavy metals sub-index (SIHM), and organic matter sub-index (SIOM). Each group contributed with weights of 0.30, 0.30, and 0.40, respectively, for theWQIHA formulation. The SIPC and SIOM showed that the areas near the head of the basin presented excellent and good quality, while the urbanized areas were qualified as marginal to poor; SIHM reported good quality in all points and seasons. Regarding the WQIHA, the index shows good quality in the zones above 3184 m of altitude, contrasting with poor quality downstream, decreasing notably in both seasons, suggesting continuous degradation of the water body.