关键词: 长江经济带, 政策评价, 文本挖掘, 生态保护, Topsis-PMC指数模型

Abstract: As a typical representative of ecological governance and high-quality development in large river basins, the Yangtze River Economic Belt's ecological and environmental protection efforts have received significant attention from the Party and the state. Focusing on the concept of "prioritizing ecological conservation and refraining from large-scale development" proposed by President Xi, the ecological protection of the Yangtze River Economic Belt has achieved great results under the guidance of a series of policies. In-depth analysis of the rationality of relevant policy settings and the comprehensiveness of content is an important basis for further improving policies. Eight ecological protection policies for the Yangtze River Economic Belt promulgated by the state between 2016 and 2021 were selected, and the relevant policy texts were quantitatively evaluated using text mining and the TOPSIS-PMC index model, and the policies were deeply analyzed in combination with the PMC index and the PMC surface map. The findings indicate that, at the macro level, the average PMC index of the eight policy samples is 7.11, which is at an excellent level overall, indicating that the ecological and environmental protection policies of the Yangtze River Economic Belt in my country are relatively reasonable and comprehensive. From a micro perspective, the scores of specific indicators of the policy vary greatly, and some indicators have low scores, indicating that the existing policy still has outstanding problems that need to be solved, including the lack of coordinated governance of multiple subjects, the lack of integrated protection and systematic governance of mountains, rivers, forests, fields, lakes, grasslands and sands, the lack of standards and norms for scientific and technological means of protection and governance, and the lack of a summary of the current environmental protection status. In view of the shortcomings of the current policy, the following improvement suggestions are put forward: 1) Diversify the subjects of ecological protection and governance, and build a coordinated linkage mechanism for ecological and environmental governance in the Yangtze River Economic Belt. 2) Systematize the thinking of ecological protection and governance, and build a comprehensive governance system across administrative regions in the Yangtze River Economic Belt. 3) Digitalize the results of ecological protection and governance, and build an open data and achievement display platform for ecological protection in the Yangtze River Economic Belt.

Key words: Yangtze River Economic Belt, Policy evaluation, text mining, ecological protection, Topsis-PMC index model