TOPSIS Comprehensive Evaluation Model for Light Pollution based on Entropy Weight Method

Abstract

Light pollution is a serious and growing problem worldwide. How to develop a widely applicable light pollution indicator analysis model to help people monitor and mitigate light pollution is a question worthy of our consideration. This paper uses the TOPSIS integrated evaluation and decision method based on Entropy Weight Method (EWM) and Analytic Hierarchy Process (AHP) to identify indicators and establish a widely applicable LPI (Light Pollution Index) analyze Model for the global light pollution problem. Then this model is used for analyzing specific differentiated areas and develop optimal intervention strategies. In order to build an accurate model to assess global light pollution hazard levels, this paper have to take three key aspects into account: Light Trespass, Glare, Spill Light. For each aspect, six to eight sub-indicators were selected to measure different aspects of light pollution. This paper evaluated all indicators and by combining EWM and AHP, this paper obtained a Light Pollution Index Analyze Model. To verify the rationality and reliability of this model, this paper uses TOPSIS integrated evaluation and decision method based on EWM to predict and rank 20 countries worldwide in terms of light pollution risk index. The results show that comparing our data with monitoring data of Light Pollution Map, the two rankings show a high degree of agreement. Therefore, the model of this paper is reasonable and reliable. And the research of this paper can provide effective help to the research and monitoring of light pollution.