The study aims to assess spatial and temporal water quality variations in the upper reaches
of the Vietnamese Mekong Delta. Thirty-one water monitoring samples of the two main rivers
(Tien and Hau Rivers) and six canals flowing through An Giang Province were collected in the
dry season (March) and the rainy season (September) from 2009 to 2019. Seven physicochemical
parameters were analyzed including temperature, pH, dissolved oxygen (DO), biochemical oxygen
demand (BOD), total suspended solids (TSS), orthophosphate (P-PO4
3-), and coliforms. Water
quality index (WQI), cluster analysis (CA), and discriminant analysis (DA) were applied to
evaluate water quality, spatial and temporal variations, and seasonal discriminant water variables.
WQI values (15–71) indicated surface water quality was very bad to medium in which the water
quality in larger and in smaller rivers in the dry season was less polluted than that in the rainy
season due to erosion and runoff water containing waste materials in the wet season.Etc...
Keywords
Water quality; Coliform; An Giang; Cluster analysis; Discriminant analysis; Water quality index