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Int. J. Environ. Res. Public Health 2015, 12(2), 2230-2248; doi:10.3390/ijerph120202230

Dynamic Assessment of Water Quality Based on a Variable Fuzzy Pattern Recognition Model

Faculty of Infrastructure Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China
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Author to whom correspondence should be addressed.
Academic Editor: Miklas Scholz
Received: 6 January 2015 / Revised: 5 February 2015 / Accepted: 10 February 2015 / Published: 16 February 2015
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Abstract

Water quality assessment is an important foundation of water resource protection and is affected by many indicators. The dynamic and fuzzy changes of water quality lead to problems for proper assessment. This paper explores a method which is in accordance with the water quality changes. The proposed method is based on the variable fuzzy pattern recognition (VFPR) model and combines the analytic hierarchy process (AHP) model with the entropy weight (EW) method. The proposed method was applied to dynamically assess the water quality of Biliuhe Reservoir (Dailan, China). The results show that the water quality level is between levels 2 and 3 and worse in August or September, caused by the increasing water temperature and rainfall. Weights and methods are compared and random errors of the values of indicators are analyzed. It is concluded that the proposed method has advantages of dynamism, fuzzification and stability by considering the interval influence of multiple indicators and using the average level characteristic values of four models as results. View Full-Text
Keywords: water quality assessment; fuzzification; dynamic; interval influence; characteristic level value water quality assessment; fuzzification; dynamic; interval influence; characteristic level value
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, S.; Wang, T.; Hu, S. Dynamic Assessment of Water Quality Based on a Variable Fuzzy Pattern Recognition Model. Int. J. Environ. Res. Public Health 2015, 12, 2230-2248.

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