Environmental factors influencing the distribution of total and fecal coliform bacteria in six water storage reservoirs in the Pearl River Delta Region,China

The Pearl River Delta （PRD） is one of the most developed and densely populated regions in China.Quantifying the amount of pathogens in the source of drinking water is important for improving water quality.We collected water samples from six major water storage reservoirs in the PRD region in both we...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2010, Vol.22 (5), p.663-668
Main Authors: Hong, Huachang, Qiu, Jianwen, Liang, Yan
Format: Article
Language:English
Subjects:
Bacteria
Brackish
China
coliform bacteria
Deltas
Drinking water
Dry season
Enterobacteriaceae - isolation & purification
Feces - microbiology
location
Pathogens
physicochemical parameters
Precipitation
Principal Component Analysis
rainfall
reservoir
Reservoirs
Rivers
Rivers - microbiology
Seasons
Time Factors
Water Microbiology
Water Supply - analysis
水库蓄水
环境因素
珠江三角洲地区
粪大肠菌群
细菌总数
营养成分分析
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Summary:The Pearl River Delta （PRD） is one of the most developed and densely populated regions in China.Quantifying the amount of pathogens in the source of drinking water is important for improving water quality.We collected water samples from six major water storage reservoirs in the PRD region in both wet and dry seasons in 2006.Results showed that external environmental factors,such as precipitation,location,as well as the internal environmental factors,i.e.,physicochemical properties of the water,were closely related with the distribution of coliforms.Seasonally,the coliform bacterial concentrations in wet season were one to two orders of magnitude greater than those in dry season.Spatially,coliform bacterial levels in reservoirs near urban and industrial areas were significantly higher （p 〈 0.05） than those in remote areas.Correlation analyses showed that the levels of coliforms had close relationships with pH,temperature,suspended solid,organic and inorganic nutrients in water.Principal components analysis further demonstrated that total coliforms in the reservoirs were closely related with water physicochemical properties,while fecal coliforms were more associated with external input brought in by seasonal runoff.
ISSN:1001-0742
1878-7320
DOI:10.1016/s1001-0742(09)60160-1