Research on Ecological Evaluation Model Based on Principal Component Analysis

In recent years, China has adhered to the concept of sustainable development of respecting nature, protecting nature and living in harmony with nature. A typical example is China’s long-term ecological management of Saihanba. Since 1962, after more than half a century of rescue, China has established the world’s largest artificial forest, improving the ecological environment of Saihanba area, making Saihanba the lungs of surrounding cities (Beijing, Tianjin, etc.). We collect relevant environmental data from 2002 to 2020, established 11 indicators through principal component analysis, score the annual environmental quality of Saihanba with 99% confidence, and propose an environmental assessment model for Saihanba. In second part, we collect environmental data in Beijing in recent years, such as the frequency of sandstorms, particle concentration, etc., and aims to explore the benefits of Saihanba governance to surrounding cities. The results show that after the implementation of environmental management measures, the environmental quality of Saihanba has been improved, and it has had a positive impact on the surrounding cities, that is, improved the environmental quality of nearby cities such as the Beijing and Tianjin.