改进TOPSIS法在甘肃省农村饮水安全评价中的应用

饮水安全是人类健康的基本保障。针对甘肃省农村饮水安全问题，运用层次分析法、熵权法、改进TOPSIS法以及障碍度模型，评价了甘肃省2005、2015以及2020年的农村饮水安全状况，比较了改进TOPSIS法与模糊综合评价模型评价结果的差异，以期建立适用于甘肃省的综合评价指标体系，为农村饮水安全工程建设提供科学参考。结果表明：2005-2020年，甘肃省农村饮水安全水平逐步提升，2020年各地市（州）农村饮水安全水平均已达到基本安全水平以上；甘肃省农村饮水安全工程建设的主要障碍因子为集中供水率和自来水普及率；与模糊综合评价模型相比，改进TOPSIS法的客观性更强，计算过程中的信息损失量小，可以在农村饮水安全评价研究中进一步应用。甘肃省农村饮水安全工程建设已取得较大成效，未来需围绕薄弱环节巩固提高。

Application of improved TOPSIS method in rural drinking water safety evaluation in Gansu Province

Drinking water safety is the basic requirement for safeguarding human health. In view of the safety of rural drinking water in Gansu Province, we adopted the analytic hierarchy process (AHP), entropy weight, improved TOPSIS method and obstacle degree model for the analysis. In order to establish a comprehensive evaluation index system applicable to Gansu Province and provide a scientific reference for the construction of rural drinking water safety projects, we evaluated the rural drinking water safety status of Gansu Province in 2005, 2015 and 2020, and compared the differences between the evaluation results of the improved TOPSIS method and the fuzzy comprehensive evaluation model. The results indicate that in the past 15 years, the level of rural drinking water safety in Gansu Province has gradually improved. By 2020, the rural drinking water safety level of all cities has reached the level of basic safe and above. The main obstacles to the construction of rural drinking water safety in Gansu Province are the centralized water supply rate and the tap water penetration rate. Compared with the fuzzy comprehensive evaluation model, the improved TOPSIS method has stronger objectivity and small information loss in the calculation process, which can be further applied to the evaluation of rural drinking water safety. The construction of rural drinking water safety in Gansu Province has achieved great results, and it is necessary to consolidate and improve around weak links in the future.