Model and Case Study of Light Pollution Evaluation in Different Regions
With the rapid development of society and economy,environmental problems are becoming more and more prominent,and light pollution is a new type of environmental pollu-tion.Influenced by various factors,the light pollution level varies in different regions.In this paper,an evaluation model is constructed for analyzing the light pollution level in different re-gions.First,seven indicators related to socio-economic,environmental,and nighttime lighting intensity are selected to build the indicator system;then,the entropy weighting method and the judgment matrix in hierarchical analysis are used to obtain the comprehensive weight of each indicator;finally,the light pollution level score is calculated by TOPSIS.With the help of cluster analysis,the light pollution level is divided into four levels:mild,moderate,severe,and serious.Meanwhile,relevant data corresponding to four types of locations:Shanghai,Kaifeng City,Zhangjiakou City and Shennongjia Forest Area,respectively,are selected to calculate the light pollution scores and judge the levels of these locations.Compared with the actual,it was found that the model can accurately assess the light pollution level in different types of areas and convey effective information.Finally,the stability and accuracy of the model were further demonstrated by sensitivity analysis.
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万方数据
