WATER QUALITY ASSESSMENT OF RIVERS IN PADANG USING WATER POLLUTION INDEX AND NSF-WQI METHOD. International Journal of Geomate, [S. l.], v. 17, n. 64, p. 192–200, 2019. Disponível em: https://geomatejournal.com/geomate/article/view/3184. Acesso em: 19 oct. 2026.