摘要
对城市水安全进行评价有利于寻找制约城市发展的短板因素。本文引入信息可替代性指标筛选方法对指标体系进行精炼,将24个指标精简为10个指标,并采用常权对筛选前后指标体系进行校核,基于变权思想对常权权重进行修正,并以西安市为例对该模型进行验证。结果表明:西安市城市水安全级别逐年上升,最后稳定在II级,短板因素为人均水资源量、地下水回灌量、工业比重、有效灌溉面积,指标筛选前后水安全级别一致,信息可替代性指标筛选方法在简化指标体系后,能在较大程度上保留原指标体系信息量,变权法能够更加真实的反映各指标在不同状态时所发挥的作用,相对于常权法,变权法得到的城市水安全评价级别显示出更大的差异性,该模型表现较好。
Evaluating urban water security is good for finding shortcomings that constrain urban development.This paper introduces the information substitutability index selection method to refine the index system,reducing the 24 indicators to 10 indicators,and using constant weights to check the index system before and after selection. Constant weight modified by the idea of variable weight,and the model is validated with Xi’an City as an example. The results show that the urban water safety level in Xi’an increases year after year and finally stabilizes at level II. The shortcomings are the amount of water resources per capita,the amount of groundwater recharge,the proportion of secondary industry,and the effective irrigation area. There is no change in water security level before and after index selection. After simplifying the index system,the method of information substitutability index selection can retain much of the information of the original index system.The method of variable weight can more realistically reflect the role played by each indicator in different states.Compared to the method of constant weight,the method of variable weight shows greater variability.
作者
黄垣森
唐德善
HUANG Yuan-sen;TANG De-shan(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《中国农村水利水电》
北大核心
2022年第3期54-59,68,共7页
China Rural Water and Hydropower
基金
国家重点研发计划项目(2017YFC0405805-04)。
关键词
信息可替代性
指标筛选
变权法
城市水安全
云模型
CRITIC
information substitutability
index selection
variable weight
urban water security
cloud model
CRITIC
