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Assessment of temporal and spatial variation of coastal water quality and source identification along Macau peninsula

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Abstract

Cluster analysis (CA), discriminant analysis (DA) and principal component analysis (PCA) were comprehensively coupled to explore and identify the spatial and temporal variation and potential pollution sources in coastal water quality along Macau peninsula. The results show that the 12?months could be grouped into two periods, June?September and the remaining months, and the entire area divided into two clusters, one located at the western sides, and the other on the southeast and southern sides of the Macau peninsula. Through backward stepwise DA, pH, Cl ? , TSS, Color and TP, Chloride, Color, NH 4 + , DO, COD were discriminant variables of spatial and temporal variation, with 84.82 and 76.54% correct assignments, respectively. Fecal pollution, organic pollution and soil weathering are among the major sources for coastal water quality deterioration along Macau peninsula. This study illustrates that application of multivariate statistical techniques was beneficial to gain knowledge for further optimizing the monitoring network and controlling coastal water quality along Macau peninsula.

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Acknowledgements

This research was funded by the Department of Science and Technology of Fujian province as a Talented Youth scholar in Fujian Province (No. 2007F3093). The authors also sincerely thank to Mrs. Lee Mue-heong (Official Provisional Municipal Council of Macau) and Dr. Zhou Feng (Environmental School, Peking University) for the suggestions and help of data analysis.

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Authors and Affiliations

  1. Joint Key Laboratory of Coastal Study, Xiamen University, Xiamen, 361005, China

    Jinliang Huang

  2. Environmental Science Research Center, Xiamen University, Xiamen, 361005, China

    Jinliang Huang

  3. Department of Environmental Science and Engineering, Tsinghua University, Beijing, 100084, China

    Manhim Ho?&?Pengfei Du

  4. The Official Provisional Municipal Council of Macau, Macau, China

    Manhim Ho

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  1. Jinliang Huang
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  2. Manhim Ho
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  3. Pengfei Du
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Correspondence to Jinliang Huang .

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Huang, J., Ho, M. & Du, P. Assessment of temporal and spatial variation of coastal water quality and source identification along Macau peninsula. Stoch Environ Res Risk Assess 25 , 353?361 (2011). https://doi.org/10.1007/s00477-010-0373-4

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  • DOI : https://doi.org/10.1007/s00477-010-0373-4

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