Limits...
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

Spatial Variation of WPI in each Field survey In The Shanchong River Basin.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4383595&req=5

pone.0118590.g005: Spatial Variation of WPI in each Field survey In The Shanchong River Basin.

Mentions: The spatial variation of WPI in each field survey from upstream to downstream along the river are shown in Fig. 5. The data used to analyse spatial variation of WPI come from 1#-12# sampling sites which were all in the Shanchong river. A behavior similar to that described for temporal variation was observed again, as the WPI of TN was almost the highest after May, whereas the WPI of CODcr was always the lowest compared to other pollution parameters. Indeed, it is not easy to note a clear trend of either increase or decrease in the values of WPI, especially at March and April. The Daniel Trend Test could provide a quantitative evaluation of the change in trend. According to Table 3, the spatial variation of each field survey is clear, in the sence that the result shows that the WPI of most monitor parameters are increased (Rs>0) from upstream to downstream. Specifically, just a few are decreased (Rs<0) which were TP (March, April and July) and CODcr (March, June, September and October). It indicates that the main spatial trend of pollution is aggravated from upstream to downstream. The reason may be the rainfall erosion pollutants from farmland soil to river, meanwhile, leaching of containment matters to ground water, finally may effect the downstream of river, make pollution aggravated from upstream to downstream of the river.


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)

Spatial Variation of WPI in each Field survey In The Shanchong River Basin.
© Copyright Policy
Related In: Results  -  Collection

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

pone.0118590.g005: Spatial Variation of WPI in each Field survey In The Shanchong River Basin.
Mentions: The spatial variation of WPI in each field survey from upstream to downstream along the river are shown in Fig. 5. The data used to analyse spatial variation of WPI come from 1#-12# sampling sites which were all in the Shanchong river. A behavior similar to that described for temporal variation was observed again, as the WPI of TN was almost the highest after May, whereas the WPI of CODcr was always the lowest compared to other pollution parameters. Indeed, it is not easy to note a clear trend of either increase or decrease in the values of WPI, especially at March and April. The Daniel Trend Test could provide a quantitative evaluation of the change in trend. According to Table 3, the spatial variation of each field survey is clear, in the sence that the result shows that the WPI of most monitor parameters are increased (Rs>0) from upstream to downstream. Specifically, just a few are decreased (Rs<0) which were TP (March, April and July) and CODcr (March, June, September and October). It indicates that the main spatial trend of pollution is aggravated from upstream to downstream. The reason may be the rainfall erosion pollutants from farmland soil to river, meanwhile, leaching of containment matters to ground water, finally may effect the downstream of river, make pollution aggravated from upstream to downstream of the river.

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