Application of Improved Metter-Element Model in Water Quality Assessment of Beizhijiang Drainage Basin
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Abstract:
In this study, the matter-element analysis theory was used to expand the single policy decision problem into a multi-dimensional matter-element structure, and the calculation of the distance of point and interval in the traditional matter-element model was improved. The entropy method was used to determine the weight of each index, and an improved multi-dimensional matter-element model of water quality assessment was developed. The improved matter-element model was used to evaluate the water quality in the Beizhijiang Drainage Basin of Guangxi. The water quality data in 2011 were collected, and five typical sections and eight water quality assessment indexes were selected. The results showed that class II water is in the upstream of Beizhijiang Drainage Basin , whereas class III water in the midstream and downstream. The results were in accordance with water function zonation in Laibin city, indicating that the improved matter-element method is reliable for quality assessment.
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