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Applying factor analysis combined with kriging and information entropy theory for mapping and evaluating the stability of groundwater quality variation in Taiwan.

Shyu GS, Cheng BY, Chiang CT, Yao PH, Chang TK - Int J Environ Res Public Health (2011)

Bottom Line: Groundwater quality demonstrated apparent differences between the northern and southern areas of Taiwan when divided by the Wu River.Approximately 52% of the monitoring wells in southern Taiwan suffered from progressing seawater intrusion, causing unstable groundwater quality.The method proposed in this study for analyzing groundwater quality inspects common stability factors, identifies potential areas influenced by common factors, and assists in elevating and reinforcing information in support of an overall groundwater management strategy.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Management, Tungnan University, Taipei County 222, Taiwan. gsshyu@mail.tnu.edu.tw

ABSTRACT
In Taiwan many factors, whether geological parent materials, human activities, and climate change, can affect the groundwater quality and its stability. This work combines factor analysis and kriging with information entropy theory to interpret the stability of groundwater quality variation in Taiwan between 2005 and 2007. Groundwater quality demonstrated apparent differences between the northern and southern areas of Taiwan when divided by the Wu River. Approximately 52% of the monitoring wells in southern Taiwan suffered from progressing seawater intrusion, causing unstable groundwater quality. Industrial and livestock wastewaters also polluted 59.6% of the monitoring wells, resulting in elevated EC and TOC concentrations in the groundwater. In northern Taiwan, domestic wastewaters polluted city groundwater, resulting in higher NH(3)-N concentration and groundwater quality instability was apparent among 10.3% of the monitoring wells. The method proposed in this study for analyzing groundwater quality inspects common stability factors, identifies potential areas influenced by common factors, and assists in elevating and reinforcing information in support of an overall groundwater management strategy.

Show MeSH
Location of monitoring wells in groundwater areas.
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f1-ijerph-08-01084: Location of monitoring wells in groundwater areas.

Mentions: This study analyzed groundwater samples collected seasonally from 2005–2007, derived from 414 regional monitoring wells shown in Figure 1. In general, each monitoring well was sampled and analyzed quarterly. Sometimes samples could not be collected due to natural or human interruption causes. As a result, this study collected eight or more samples from about 90% of the monitoring wells (373) to provide stable and effective hydrochemical data.


Applying factor analysis combined with kriging and information entropy theory for mapping and evaluating the stability of groundwater quality variation in Taiwan.

Shyu GS, Cheng BY, Chiang CT, Yao PH, Chang TK - Int J Environ Res Public Health (2011)

Location of monitoring wells in groundwater areas.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3118879&req=5

f1-ijerph-08-01084: Location of monitoring wells in groundwater areas.
Mentions: This study analyzed groundwater samples collected seasonally from 2005–2007, derived from 414 regional monitoring wells shown in Figure 1. In general, each monitoring well was sampled and analyzed quarterly. Sometimes samples could not be collected due to natural or human interruption causes. As a result, this study collected eight or more samples from about 90% of the monitoring wells (373) to provide stable and effective hydrochemical data.

Bottom Line: Groundwater quality demonstrated apparent differences between the northern and southern areas of Taiwan when divided by the Wu River.Approximately 52% of the monitoring wells in southern Taiwan suffered from progressing seawater intrusion, causing unstable groundwater quality.The method proposed in this study for analyzing groundwater quality inspects common stability factors, identifies potential areas influenced by common factors, and assists in elevating and reinforcing information in support of an overall groundwater management strategy.

View Article: PubMed Central - PubMed

Affiliation: Department of Environmental Management, Tungnan University, Taipei County 222, Taiwan. gsshyu@mail.tnu.edu.tw

ABSTRACT
In Taiwan many factors, whether geological parent materials, human activities, and climate change, can affect the groundwater quality and its stability. This work combines factor analysis and kriging with information entropy theory to interpret the stability of groundwater quality variation in Taiwan between 2005 and 2007. Groundwater quality demonstrated apparent differences between the northern and southern areas of Taiwan when divided by the Wu River. Approximately 52% of the monitoring wells in southern Taiwan suffered from progressing seawater intrusion, causing unstable groundwater quality. Industrial and livestock wastewaters also polluted 59.6% of the monitoring wells, resulting in elevated EC and TOC concentrations in the groundwater. In northern Taiwan, domestic wastewaters polluted city groundwater, resulting in higher NH(3)-N concentration and groundwater quality instability was apparent among 10.3% of the monitoring wells. The method proposed in this study for analyzing groundwater quality inspects common stability factors, identifies potential areas influenced by common factors, and assists in elevating and reinforcing information in support of an overall groundwater management strategy.

Show MeSH