A fuzzy comprehensive evaluation of water cycle health in Beijing-Tianjim-Hebei region based on combined weights of AHP and entropy method
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Abstract:
Based on clarifying the connotation of the healthy water cycle, five criterion layers covering water resources,water environment, water ecology, the water utility, and water disasters were constructed, including precipitation, per capita water resources, per mu water resources, and groundwater supply ratio. The water cycle health evaluation index system of other 18 indicators, using the combination of analytic hierarchy process and entropy met hod to assign weights and using fuzzy comprehensive evaluation method to evaluate the water cycle health status of the Beijing-Tianjin- Hebei region from 2009 to 2018.The evaluration results show that: the overall water cycle health in the Beijing-Tianjirn-Hebei region has gradually improved in the past ten years. The water cycle health levels in Beijing, Tianjin, and Hebei are sub-healt hy, normal, and sub-morbid; the storage capacity of rivers and lakes and thew ater consumption of 10,000 yuan of indust rial added value are the main indicators that affet the healthy water cycle in the Beijing-Tianjin-Hebei region.However, the development of the various indicators is not balanced, and there is still much room for improvement.
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