ECOLOGICAL SECURITY EVALUATION, OBSTACLE DEGREE ANALYSIS, AND EARLY WARNING BASED ON THE PRESSURE. STATE.RESPONSE MODEL IN HUANGSHAN CITY, CHINA

Urban ecological security evaluation is helpful for improving urban environmental quality and enhancing urban ecological system stability. This study takes Huangshan City, China as an example. By utilizing the pressure.state.response (PSR) conceptual model, the urban ecological security evaluation index system is established. Then, the index weights are calculated using the entropy-weight method to eliminate subjectivity. The ecological security comprehensive index method is used to evaluate the ecological security level. Ecological security barrier factors are calculated using the obstacle model. The development trend of ecological security is predicted via linear regression. Three main points can be deduced from the results. (1) The level of ecological security in 2012.2020 underwent an overall upward trend, and the level of ecological security in Huangshan City, China, from 2012 to 2020 was between 0.3540 and 0.6630. (2) The majority of the guideline barrier factors that affected ecological security were pressure barrier factors. Industrial solid waste, which was the primary impediment factor, affected ecological security. (3) The prediction results indicated that the level of ecological security showed an upward trend. This study provides a theoretical reference for urban sustainable development decision making.