Document Type

Journal Article

Department/Unit

Department of Biology

Title

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

Language

English

Abstract

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. © 2010 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.

Keywords

Coliform bacteria, Location, Physicochemical parameters, Rainfall, Reservoir

Publication Date

2010

Source Publication Title

Journal of Environmental Sciences

Volume

22

Issue

5

Start Page

663

End Page

668

Publisher

Elsevier

DOI

10.1016/S1001-0742(09)60160-1

ISSN (print)

10010742

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