Spatio-Temporal Evolution of Port Green Development Quality in the Yangtze River Economic Belt-Based Set Pair Analysis

Under the background of “double carbon,” building a green, smart, and safe world-class port has gradually become a new direction for China’s port development. This paper takes 18 inland ports in the Yangtze River Economic Belt as the research object, uses the set pair analysis theory model and the statistical Moran index to evaluate the green development quality level and spatial autocorrelation characteristics of each port, and then explores the spatio-temporal evolution trend of the green development quality of China’s Yangtze River Economic Belt ports from 2019 to 2021. The results show that from the perspective of time, due to the policy guidance and technological progress, the green development level of each port has been significantly improved. From the perspective of space, the green development of the Yangtze River Economic Belt presents the spatial distribution characteristics of “high at both ends and low in the middle.”