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Spatio-Temporal Trends and Identification of Correlated Variables with Water Quality for Drinking-Water Reservoirs.

Gu Q, Wang K, Li J, Ma L, Deng J, Zheng K, Zhang X, Sheng L - Int J Environ Res Public Health (2015)

Bottom Line: The results indicated that the water quality showed a trend of degradation from southwest to northeast, and the overall water quality level was exacerbated during the study period.According to the correlation coefficients, land use and socio-economic indicators were identified as the most significant factors related to reservoir water quality.The results offer insights into the spatio-temporal variations of water quality parameters and factors impacting the water quality of drinking water reservoirs in Zhejiang Province, and they could assist managers in making effective strategies to better protect water resources.

View Article: PubMed Central - PubMed

Affiliation: Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. funny@zju.edu.cn.

ABSTRACT
It is widely accepted that characterizing the spatio-temporal trends of water quality parameters and identifying correlated variables with water quality are indispensable for the management and protection of water resources. In this study, cluster analysis was used to classify 56 typical drinking water reservoirs in Zhejiang Province into three groups representing different water quality levels, using data of four water quality parameters for the period 2006-2010. Then, the spatio-temporal trends in water quality were analyzed, assisted by geographic information systems (GIS) technology and statistical analysis. The results indicated that the water quality showed a trend of degradation from southwest to northeast, and the overall water quality level was exacerbated during the study period. Correlation analysis was used to evaluate the relationships between water quality parameters and ten independent variables grouped into four categories (land use, socio-economic factors, geographical features, and reservoir attributes). According to the correlation coefficients, land use and socio-economic indicators were identified as the most significant factors related to reservoir water quality. The results offer insights into the spatio-temporal variations of water quality parameters and factors impacting the water quality of drinking water reservoirs in Zhejiang Province, and they could assist managers in making effective strategies to better protect water resources.

No MeSH data available.


The industrial wastewater, industrial solid waste, and domestic sewage emissions in Zhejiang Province between 2006 and 2010.
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ijerph-12-13179-f006: The industrial wastewater, industrial solid waste, and domestic sewage emissions in Zhejiang Province between 2006 and 2010.

Mentions: Zhejiang Province has experienced drastic urbanization and industrialization in the past decades, which has been accompanied by various environmental problems due to the absence of environmental awareness. According to the statistical records [25], the industrial wastewater, industrial solid waste, and domestic sewage emissions substantially increased from 2006 to 2010 (Figure 6), especially in the relatively developed cities in the northern and eastern areas of the province, such as Hangzhou, Ningbo, Shaoxing and Wenzhou. However, due to the high cost of treatment of pollutants and the lack of strict enforcement of laws, a substantial amount of pollutants was directly discharged into adjacent environments and was probably carried by surface runoff into reservoirs. This dire tendency, if not controlled, would give rise to devastating consequences of environmental deterioration and a water insecurity crisis. From a policy perspective, much more aggressive enforcement of environmental law is necessary and urgent, as is real-time monitoring of reservoir water quality and environmental conditions in watersheds. Especially in those rapidly developing regions, maintaining natural water resources during urbanization has become one of the most pressing missions. It is necessary to strictly control the populations within watersheds to alleviate the pressure from domestic pollutants on reservoirs. Industrial development must be aggressively controlled and supervised, and factories posing pollution risks must be prohibited within reservoir watersheds [46].


Spatio-Temporal Trends and Identification of Correlated Variables with Water Quality for Drinking-Water Reservoirs.

Gu Q, Wang K, Li J, Ma L, Deng J, Zheng K, Zhang X, Sheng L - Int J Environ Res Public Health (2015)

The industrial wastewater, industrial solid waste, and domestic sewage emissions in Zhejiang Province between 2006 and 2010.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4627024&req=5

ijerph-12-13179-f006: The industrial wastewater, industrial solid waste, and domestic sewage emissions in Zhejiang Province between 2006 and 2010.
Mentions: Zhejiang Province has experienced drastic urbanization and industrialization in the past decades, which has been accompanied by various environmental problems due to the absence of environmental awareness. According to the statistical records [25], the industrial wastewater, industrial solid waste, and domestic sewage emissions substantially increased from 2006 to 2010 (Figure 6), especially in the relatively developed cities in the northern and eastern areas of the province, such as Hangzhou, Ningbo, Shaoxing and Wenzhou. However, due to the high cost of treatment of pollutants and the lack of strict enforcement of laws, a substantial amount of pollutants was directly discharged into adjacent environments and was probably carried by surface runoff into reservoirs. This dire tendency, if not controlled, would give rise to devastating consequences of environmental deterioration and a water insecurity crisis. From a policy perspective, much more aggressive enforcement of environmental law is necessary and urgent, as is real-time monitoring of reservoir water quality and environmental conditions in watersheds. Especially in those rapidly developing regions, maintaining natural water resources during urbanization has become one of the most pressing missions. It is necessary to strictly control the populations within watersheds to alleviate the pressure from domestic pollutants on reservoirs. Industrial development must be aggressively controlled and supervised, and factories posing pollution risks must be prohibited within reservoir watersheds [46].

Bottom Line: The results indicated that the water quality showed a trend of degradation from southwest to northeast, and the overall water quality level was exacerbated during the study period.According to the correlation coefficients, land use and socio-economic indicators were identified as the most significant factors related to reservoir water quality.The results offer insights into the spatio-temporal variations of water quality parameters and factors impacting the water quality of drinking water reservoirs in Zhejiang Province, and they could assist managers in making effective strategies to better protect water resources.

View Article: PubMed Central - PubMed

Affiliation: Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. funny@zju.edu.cn.

ABSTRACT
It is widely accepted that characterizing the spatio-temporal trends of water quality parameters and identifying correlated variables with water quality are indispensable for the management and protection of water resources. In this study, cluster analysis was used to classify 56 typical drinking water reservoirs in Zhejiang Province into three groups representing different water quality levels, using data of four water quality parameters for the period 2006-2010. Then, the spatio-temporal trends in water quality were analyzed, assisted by geographic information systems (GIS) technology and statistical analysis. The results indicated that the water quality showed a trend of degradation from southwest to northeast, and the overall water quality level was exacerbated during the study period. Correlation analysis was used to evaluate the relationships between water quality parameters and ten independent variables grouped into four categories (land use, socio-economic factors, geographical features, and reservoir attributes). According to the correlation coefficients, land use and socio-economic indicators were identified as the most significant factors related to reservoir water quality. The results offer insights into the spatio-temporal variations of water quality parameters and factors impacting the water quality of drinking water reservoirs in Zhejiang Province, and they could assist managers in making effective strategies to better protect water resources.

No MeSH data available.