Abstract
Monitoring water quality is a subject of ongoing concern and study since water quality is closely related to human life. Although Nemerow index method is widely used in water quality assessment, the artificial threshold setting may lead to some errors. In this study, we improved the traditional Nemerow index method and built a three-dimensional water quality assessment model combined with the modified firefly algorithm (FA). Then, we applied the improved three-dimensional Nemerow index method to evaluate 100 random water samples. Compared with the traditional method, the improved one proved to be more objective, scientific and practical.
Highlights
Water quality is closely related to human health and the sustainable development of ecosystems
The Nemerow index method has some flaws. It doesn’t consider the weights of various pollution factors. This method does not balance the effects of different pollution factors, which may have a negative impact on the accuracy of the assessment results
In order to test whether the improved three-dimensional Nemerow index method based on firefly algorithm is objective, feasible and universal, we need to apply it to evaluate enough water samples from a variety of water quality environment and compare the evaluation result with the result assessed by traditional method
Summary
Water quality is closely related to human health and the sustainable development of ecosystems. The Nemerow index method has some flaws It doesn’t consider the weights of various pollution factors. In other words, this method does not balance the effects of different pollution factors, which may have a negative impact on the accuracy of the assessment results. We will improve the traditional Nemerow index method first and combine it with the firefly algorithm to establish a three-dimensional water quality assessment model. Through these improvements, the possible errors due to the subjective determination of water quality standards will be overcome
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