西安市生态环境及城市发展质量评估

良好的生态环境是推动城市高质量发展的重要基础,决定了城市建设水平与人居环境质量。以西安市为研究区,计算遥感生态指数(RSEI)评估城市生态环境状况;构建城市高质量发展评价指标体系,使用全排列多边形图示法评估城市发展质量;再运用耦合协调度模型分析两者耦合协调度的时间变化趋势。结果表明: 西安市城市生态状况呈南高北低的格局,2010—2020年RSEI整体呈上升趋势,但城内六区的RSEI一直在降低,周边区县的RSEI基本保持不变或有所提升;西安市城市发展质量有所提升,城市发展质量等级为较低级别,城市发展3个子系统的质量提升具有不均衡性,提升幅度为生态子系统>经济子系统>社会子系统;西安市两类指数的耦合协调度提高,协调水平从勉强协调提升为初级协调。

Evaluation of ecological environment and urban development quality in Xi’an City,China

Sound ecological environment is an important foundation for promoting high-quality urban development, as it determines the level and quality of urban construction and human settlements. Taking Xi’an as the study area, we used remote sensing ecological index (RSEI) to evaluate the urban ecological environment. The evaluation index system of high-quality urban development was constructed and the entire-array-polygon was used to evaluate the urban development quality. The coupling coordination degree model was used to analyze the temporal variations of the coupling coordination degree of those two factors. The results showed that the urban ecological condition of Xi’an showed a pattern of high in the south and low in the north, and that the level of RSEI had an upward trend in 2010-2020. The RESI of the six inner districts of Xi’an decreased, but the RESI of the surrounding districts of Xi’an was stable or improved. The urban development quality of Xi’an was improved in 2010-2020, though the quality level was still at the low level. The improvement of the three major subsystems of urban development was uneven, and the increase range of three subsystems from largest to smallest was ranked as ecological subsystem > economic subsystem > social subsystem. The coupling coordination of the two kinds of index increased in 2010-2020, and the coordination level had been prompted from barely coordinated to primary.