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Outline
To address the shortcomings of existing water safety evaluation methods in terms of scientific indicator selection and accurate weight allocation, this study focuses on the optimal selection of indicators and optimization of weight assignment, starting from five aspects of flood control, drinking water, water use, river and lake ecology, and socio-economic security. The key indicators are selected through correlation analysis, principal component analysis, and information sensitivity analysis. The combined weight method, integrating entropy weight method, analytic hierarchy process, projection pursuit model, and cloud model, is used to solve the indicator weights, which are then optimized by simulated annealing. Finally, the cloud model is employed for comprehensive evaluation, with an application case in Chenzhou City, Hunan Province. The results show that the indicator optimization identified 22 key indicators, including industrial recycled water rate and per capita water resource availability; The correlation between the weights obtained by the simulated annealing algorithm and indicator information sensitivity is the highest (R2=0.744 2), indicating a more reasonable weight distribution; The water safety status of Chenzhou City from 2016 to 2022 was generally basically safe, with a continuous improvement trend. The results validate the effectiveness and applicability of the proposed model, which provides new methodological support and practical guidance for urban water safety evaluation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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