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Combined multivariate statistical techniques, Water Pollution Index (WPI) and Daniel Trend Test methods to evaluate temporal and spatial variations and trends of water quality at Shanchong River in the Northwest Basin of Lake Fuxian, China.

Wang Q, Wu X, Zhao B, Qin J, Peng T - PLoS ONE (2015)

Bottom Line: The results show that the main trend of pollution was aggravated during the transition from the dry to the rainy season.The Water Pollution Index of Total Nitrogen is the highest of all pollution parameters, whereas the Chemical Oxygen Demand (Chromium) is the lowest.Our results suggest that strategies to prevent water pollutionat the Shanchong River basin need to focus on non-point pollution control by employing appropriate fertilizer formulas in farming, and take the measures of soil and water conservation at Shanchong reservoir area, and purifying sewage from scattered villages.

View Article: PubMed Central - PubMed

Affiliation: Yuxi Research Center for Eco-environmental Sciences on Plateau Lakes, Yuxi Normal University, Yuxi, Yunnan Province, P.R. China.

ABSTRACT
Understanding spatial and temporal variations in river water quality and quantitatively evaluating the trend of changes are important in order to study and efficiently manage water resources. In this study, an analysis of Water Pollution Index (WPI), Daniel Trend Test, Cluster Analysis and Discriminant Analysis are applied as an integrated approach to quantitatively explore the spatial and temporal variations and the latent sources of water pollution in the Shanchong River basin, Northwest Basin of Lake Fuxian, China. We group all field surveys into 2 clusters (dry season and rainy season). Moreover, 14 sampling sites have been grouped into 3 clusters for the rainy season (highly polluted, moderately polluted and less polluted sites) and 2 clusters for the dry season (highly polluted and less polluted sites) based on their similarities and the level of pollution during the two seasons. The results show that the main trend of pollution was aggravated during the transition from the dry to the rainy season. The Water Pollution Index of Total Nitrogen is the highest of all pollution parameters, whereas the Chemical Oxygen Demand (Chromium) is the lowest. Our results also show that the main sources of pollution are farming activities alongside the Shanchong River, soil erosion and fish culture at Shanchong River reservoir area and domestic sewage from scattered rural residential area. Our results suggest that strategies to prevent water pollutionat the Shanchong River basin need to focus on non-point pollution control by employing appropriate fertilizer formulas in farming, and take the measures of soil and water conservation at Shanchong reservoir area, and purifying sewage from scattered villages.

No MeSH data available.


Related in: MedlinePlus

The result of Cluster Analysis In The Shanchong River Basin.(A: Hierarchical Cluster Analysis used in temporal variations.; B: Hierarchical Cluster Analysis in the Dry Season.; C: Hierarchical Cluster Analysis in the Rainy Season)
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pone.0118590.g003: The result of Cluster Analysis In The Shanchong River Basin.(A: Hierarchical Cluster Analysis used in temporal variations.; B: Hierarchical Cluster Analysis in the Dry Season.; C: Hierarchical Cluster Analysis in the Rainy Season)

Mentions: Hierarchical Cluster Analysis used in temporal variations yields a dendrogram (Fig. 3A), 7 months were grouped into two clusters. Cluster 1 (the first period) includes May, June, July and September, which corresponds to the rainy season. Additionally, cluster 2 (the second period) includes March, April and October, which corresponds to the dry season, with the exception of October. Specifically, most of the pollutants have been washed away by the earlier runoff and reduce contamination in October, although it belongs to the rainy season. Therefore, 7 months are divided into two different clusters (rainy season and dry season). This temporal pattern of water quality actually makes more sense because of the obvious discrimination between the rainy season and dry season, and the water quality is mainly affected by the non-point source pollution in the present study area.


Combined multivariate statistical techniques, Water Pollution Index (WPI) and Daniel Trend Test methods to evaluate temporal and spatial variations and trends of water quality at Shanchong River in the Northwest Basin of Lake Fuxian, China.

Wang Q, Wu X, Zhao B, Qin J, Peng T - PLoS ONE (2015)

The result of Cluster Analysis In The Shanchong River Basin.(A: Hierarchical Cluster Analysis used in temporal variations.; B: Hierarchical Cluster Analysis in the Dry Season.; C: Hierarchical Cluster Analysis in the Rainy Season)
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4383595&req=5

pone.0118590.g003: The result of Cluster Analysis In The Shanchong River Basin.(A: Hierarchical Cluster Analysis used in temporal variations.; B: Hierarchical Cluster Analysis in the Dry Season.; C: Hierarchical Cluster Analysis in the Rainy Season)
Mentions: Hierarchical Cluster Analysis used in temporal variations yields a dendrogram (Fig. 3A), 7 months were grouped into two clusters. Cluster 1 (the first period) includes May, June, July and September, which corresponds to the rainy season. Additionally, cluster 2 (the second period) includes March, April and October, which corresponds to the dry season, with the exception of October. Specifically, most of the pollutants have been washed away by the earlier runoff and reduce contamination in October, although it belongs to the rainy season. Therefore, 7 months are divided into two different clusters (rainy season and dry season). This temporal pattern of water quality actually makes more sense because of the obvious discrimination between the rainy season and dry season, and the water quality is mainly affected by the non-point source pollution in the present study area.

Bottom Line: The results show that the main trend of pollution was aggravated during the transition from the dry to the rainy season.The Water Pollution Index of Total Nitrogen is the highest of all pollution parameters, whereas the Chemical Oxygen Demand (Chromium) is the lowest.Our results suggest that strategies to prevent water pollutionat the Shanchong River basin need to focus on non-point pollution control by employing appropriate fertilizer formulas in farming, and take the measures of soil and water conservation at Shanchong reservoir area, and purifying sewage from scattered villages.

View Article: PubMed Central - PubMed

Affiliation: Yuxi Research Center for Eco-environmental Sciences on Plateau Lakes, Yuxi Normal University, Yuxi, Yunnan Province, P.R. China.

ABSTRACT
Understanding spatial and temporal variations in river water quality and quantitatively evaluating the trend of changes are important in order to study and efficiently manage water resources. In this study, an analysis of Water Pollution Index (WPI), Daniel Trend Test, Cluster Analysis and Discriminant Analysis are applied as an integrated approach to quantitatively explore the spatial and temporal variations and the latent sources of water pollution in the Shanchong River basin, Northwest Basin of Lake Fuxian, China. We group all field surveys into 2 clusters (dry season and rainy season). Moreover, 14 sampling sites have been grouped into 3 clusters for the rainy season (highly polluted, moderately polluted and less polluted sites) and 2 clusters for the dry season (highly polluted and less polluted sites) based on their similarities and the level of pollution during the two seasons. The results show that the main trend of pollution was aggravated during the transition from the dry to the rainy season. The Water Pollution Index of Total Nitrogen is the highest of all pollution parameters, whereas the Chemical Oxygen Demand (Chromium) is the lowest. Our results also show that the main sources of pollution are farming activities alongside the Shanchong River, soil erosion and fish culture at Shanchong River reservoir area and domestic sewage from scattered rural residential area. Our results suggest that strategies to prevent water pollutionat the Shanchong River basin need to focus on non-point pollution control by employing appropriate fertilizer formulas in farming, and take the measures of soil and water conservation at Shanchong reservoir area, and purifying sewage from scattered villages.

No MeSH data available.


Related in: MedlinePlus