摘要
基于系统论和信息熵理论,对黄河流域1980~2019年重要生态环境指标数据进行熵权分析,结果表明,各项指标的熵权存在随时间序列的动态变化,单一年度的指标权重结构随时间变化不断调整,各项指标在系统中的重要性非恒定.在此基础上,计算得到近40a黄河流域的环境发展指数(EDI),EDI范围为56.64~76.60.1980~2019年黄河流域EDI总体呈现"稳定-增长"的变化趋势,2003年显著增长,之后EDI持续上升.经过多年的保护与治理,黄河流域生态环境负反馈效应正在显现,系统逐步由混乱无序向稳定有序发展,黄河流域生态环境整体向好.
In this paper,entropy weights of eco-environmental indicators in the Yellow River Basin from 1980 to 2019 were analyzed based on system theory and information entropy theory.It is thus verified that entropy weights of all the indicators were dynamic and structure of indicator entropy weights varies within one single year.Then importance of individual indicators in the system was proved to be variable.On this basis,EDIs(Environment Development Indexes)of the Yellow River Basin from 1980 to 2019 were calculated,valuing between 56.64~76.60.Changing trend of EDIs in the Yellow River Basin was"stable-growing"before 2003,and saw significant growth in that year and continuous increase after.The results showed that through years of protection and restoration,the ecological negative feedback was exerting profound effect and the eco-environment was gradually going well.
作者
张金良
陈凯
张超
郭鹏程
ZHANG Jin-liang;CHEN Kai;ZHANG Chao;GUO Peng-cheng(Yellow River Engineering Consulting Co.Ltd,Zhengzhou 450003,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2021年第8期3767-3774,共8页
China Environmental Science
基金
中国工程院咨询研究项目(2019-XZ-65)。
关键词
演变特征
熵权
植被覆盖度
生境质量
黄河流域
change characteristic
entropy weights
vegetation coverage
habitat quality
the Yellow River Basin
