Study on the Risk Level of Regional Light Pollution Based on the EWM-TOPSIS Model —— A Case Study of China

Abstract

In recent years, the rapid development of industrialisation has led to serious light pollution problems . In order to measure the degree of regional light pollution, firstly, this paper divides light pollution into three parts: ecological light pollution (Eco), daylight pollution (Dai) and decorative light pollution (Dec), selects nine secondary indicators, assigns a value to each indicator using the entropy weight method (EWM), and the three main indicators are 0.2484, 0.3569 and 0.3947, and combines with the tosis to establish a comprehensive evaluation model. In addition, considering the importance of necessary light, we added three metrics to the original metrics to optimise the model to ensure better safety and comfort.Finally, Applying the model to four specific areas, namely urban, rural, suburban and protected areas, to measure the specific pollution level of the region. Domestic research on light pollution is mainly qualitative research, this paper comprehensively considers the necessity of appropriate amount of light and the harm of excessive light, and proposes a comprehensive evaluation model of light pollution based on the entropy weight method to quantitatively analyse the degree of light pollution. This paper provides a new perspective for light pollution prevention and control.