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Variable Fuzzy Set Theory to Assess Water Quality of the Meiliang Bay in Taihu Lake Basin

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Abstract

The water quality assessment is a fuzzy concept with multiple indicators and classes. Because of subjectivity in determining index weight and assessment standard as point forms in water quality assessment, evaluation results are often incompatible and independent, and sometimes with unreliable conclusions. An assessment model is developed, based on the variable fuzzy set and the information entropy theory. The model is applied to assess the water quality status of the Meiliang Bay of the Taihu Lake in China. Results show that the proposed model can determine the water quality level and provide an acceptable alternative based on optimized objectivity in determining water quality level. This study could provide a scientific basis for analyzing and evaluating the water quality for environment management.

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Acknowledgments

This project was supported by the National Natural Science Fund of China (No. 51309131, 41071018 and 41030746), the Skeleton Young Teachers Program and Excellent Disciplines Leaders in Midlife-Youth Program of Nanjing University. We appreciate the thorough and insightful comments by the editor and anonymous reviewers.

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Correspondence to Yuankun Wang.

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Wang, Y., Sheng, D., Wang, D. et al. Variable Fuzzy Set Theory to Assess Water Quality of the Meiliang Bay in Taihu Lake Basin. Water Resour Manage 28, 867–880 (2014). https://doi.org/10.1007/s11269-014-0521-6

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  • DOI: https://doi.org/10.1007/s11269-014-0521-6

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