| 摘要: |
| 区域水资源价值的准确核算是科学制定水价的基础。针对水资源价值核算体系的复杂性，本文基于熵权模拟评价模型，对西安市水资源价值核算进行研究。选取水资源数量、质量以及社会经济影响三个大类指标，构建了西安市水资源价值模糊评价模型，综合评价了西安市水资源价值，估算了居民用水价格。结果表明：西安市的水资源价格由2015年的10.46元∙m−3下降到2019年的10.33元∙m−3，水资源价格总体变化不大。实际水费支出仅占居民人均可支配收入的0.5%，远远低于设定的可承受指数（3%），水价仍有部分提升空间。在不破坏水资源的公益性及保障性，不超过居民承受力的前提下，水价仍可做部分提升，从而促进市民节约水资源。本文基于对西安市水资源价值的分析，为西安市今后合理制定水价以及可持续发展提供参考。 |
| 关键词: 熵权模拟 模糊数学模型 水资源价值 西安市 |
| DOI：10.7515/JEE222029 |
| CSTR：32259.14.JEE222029 |
| 分类号: |
| 基金项目:黄土与第四纪地质国家重点实验室开放基金（SKLLQG1933）；长安大学中央高校基本科研业务费专项资金（300102292903）；陕西省自然科学基础研究计划（2017JM4018，2021SF-497） |
| 英文基金项目:Open Fund of State Key Laboratory of Loess and Quaternary Geology (SKLLQG1933); The Fundamental Research Funds for the Central Universities, CHD (300102292903); Natural Science Basic Research Program of Shaanxi (2017JM4018, 2021SF-497) |
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| The value accounting of water resources in Xi’an based on the simulation evaluation model of entropy right |
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CAO Xingda, YANG Yinke, YUE Bin, SHENG Qiang, LIU Yanli, WANG Jinxing
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1. Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region, Ministry of Education, School of Water and Environment, Chang’an University, Xi’an 710054, China
2. The Hydrological Station of Gansu Province, Lanzhou 730000, China
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| Abstract: |
| Background, aim, and scope The basis for scientific formulation of water prices lies in the accurate calculation of the value of regional water resources. As a water-scarce city in western China, Xi’an is relatively lack of water resources, while it needs large water consumption. The aspect of resource liabilities was mainly focused on in previous research on the value of water resources in Xi’an, in which the economic value of water resources was mainly considered, so the little attention had been paid to the social and ecological values of water resources. The value of water resources was analyzed in this thesis. In this way, the scientific and rational utilization of water resources can be promoted, the awareness of saving and protecting water resources can be established, and the reference can be provided for the formulation of regional water prices. In this thesis, the comprehensive evaluation of the value of water resources in Xi’an was carried out through the analysis on the ecological, economic and social attributes of water resources in Xi’an. Materials and methods Due to the complexity of the water resources value evaluation system, the entropy weight simulation evaluation model was adopted to make the calculation of the water resources value in Xi’an. The quantity, quality and social and economic factors of water resources were chosen to construct a fuzzy evaluation model of water resources value in Xi’an. The value of water resources in Xi’an was comprehensively evaluated, and the price of residential water was estimated. Results In accordance with the results, it indicates that the price of water resources in Xi’an had dropped from 10.46 yuan·m−3 in 2015 to 10.33 yuan·m−3 in 2019, and the overall price change of water resources was not large. Discussion The deviation of the evaluation results may be caused by the inconsistency in evaluation data sources. Furthermore, it is difficult for the selected indicators to ensure the comprehensiveness of the evaluation system due to the complexity of the value of water resources, so the further perfection in the future will be needed. The big gap exists between the final evaluation results and the previous research results in other regions. Through the analysis, the reasons may be as follows: (1) the existence of differences in regions. Xi’an is located in the northwest inland of China, which has less water resources in contrast with the eastern and southern cities, so the higher price of water resources is caused to some extent. (2) The failure to consider all water usage ladders. The water usage ladder is not divided in the above research or the calculation is not made in line with the price data of the first ladder water usage with the largest number of water users, so the deviation of the evaluation results with the actual situation is caused. (3) The different selection of the maximum water charge bearing index. In contrast with the above two research areas, Xi’an has differences in terms of economy and actual situation of water resources, and there are differences in the selection of the maximum water charge bearing index, so the differences in the price calculation results of water resources are caused. (4) The failure to achieve the synchronicity in time for the done research. Instead of being unchanging, the price of water resources has close connection with social development. The research done in this thesis lags behind previous studies in terms of time. The differences exist for the actual situation of social development. A certain difference exists in the price of water resources. Conclusions The price of water can still be partially improved under the premise of not damaging the public welfare and security of water resources and not exceeding the affordability of residents, so the saving of water resources among citizens can be promoted. Recommendations and perspectives By analyzing the value of water resources in Xi’an, the reference can be provided for Xi’an to formulate a reasonable water price and promote the sustainable development of water resources. |
| Key words: entropy weight method fuzzy evaluation model the value of water resources Xi’an |
