Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis
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...
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| Format: | Article |
| Language: | English |
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Environmental Research Institute, Chulalongkorn University
2020-11-01
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| Series: | Applied Environmental Research |
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| Online Access: | https://ph01.tci-thaijo.org/index.php/aer/article/view/240912 |
| _version_ | 1827350927297740800 |
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| author | Giao Thanh Nguyen Thi Hong Nhien Huynh |
| author_facet | Giao Thanh Nguyen Thi Hong Nhien Huynh |
| author_sort | Giao Thanh Nguyen |
| collection | DOAJ |
| description |
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-PO43-), 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. CA grouped the water quality in the dry and rainy seasons into four clusters mainly due to BOD and coliforms in the dry season; TSS and coliforms in the rainy season. Discriminant analysis revealed that DO, TSS, coliforms, temperature and BOD significantly contributed to seasonal variations in water quality. Therefore, water quality monitoring in the surveyed area could only focus on DO, TSS, coliforms, temperature and BOD to reduce monitoring cost.
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| first_indexed | 2024-03-08T01:49:38Z |
| format | Article |
| id | doaj.art-08dc0676509a4ace82dc30a099080912 |
| institution | Directory Open Access Journal |
| issn | 2287-075X |
| language | English |
| last_indexed | 2024-03-08T01:49:38Z |
| publishDate | 2020-11-01 |
| publisher | Environmental Research Institute, Chulalongkorn University |
| record_format | Article |
| series | Applied Environmental Research |
| spelling | doaj.art-08dc0676509a4ace82dc30a0990809122024-02-14T10:49:31ZengEnvironmental Research Institute, Chulalongkorn UniversityApplied Environmental Research2287-075X2020-11-01431Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant AnalysisGiao Thanh Nguyen0Thi Hong Nhien Huynh1College of Environment and Natural Resources, Can Tho University, Can Tho, VietnamCollege of Environment and Natural Resources, Can Tho University, Can Tho, Vietnam 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-PO43-), 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. CA grouped the water quality in the dry and rainy seasons into four clusters mainly due to BOD and coliforms in the dry season; TSS and coliforms in the rainy season. Discriminant analysis revealed that DO, TSS, coliforms, temperature and BOD significantly contributed to seasonal variations in water quality. Therefore, water quality monitoring in the surveyed area could only focus on DO, TSS, coliforms, temperature and BOD to reduce monitoring cost. https://ph01.tci-thaijo.org/index.php/aer/article/view/240912Water qualityColiformAn GiangCluster analysisDiscriminant analysisWater quality index |
| spellingShingle | Giao Thanh Nguyen Thi Hong Nhien Huynh Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis Applied Environmental Research Water quality Coliform An Giang Cluster analysis Discriminant analysis Water quality index |
| title | Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis |
| title_full | Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis |
| title_fullStr | Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis |
| title_full_unstemmed | Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis |
| title_short | Evaluating Water Quality Variation in the Vietnamese Mekong Delta Area Using Cluster and Discriminant Analysis |
| title_sort | evaluating water quality variation in the vietnamese mekong delta area using cluster and discriminant analysis |
| topic | Water quality Coliform An Giang Cluster analysis Discriminant analysis Water quality index |
| url | https://ph01.tci-thaijo.org/index.php/aer/article/view/240912 |
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