基于RSEI模型的石家庄生态环境质量评价

Evaluation of ecological environment quality in Shijiazhuang based on RSEI model

对石家庄地区的生态环境质量进行评价,对于该地区的生态环境治理和保护有重要意义.故选取2001—2018年之间5个时间点的Landsat TM和Landsat-8 OLI影像,通过提取绿度、湿度、干度和热度4项指标,结合主成分分析得到遥感生态指数RSEI,从而对石家庄地区的生态环境质量时空演变进行分析.结果表明:2001—2018年,石家庄RSEI指数略有上升;研究区大部分区域为RSEI等级为良和优的地区,占比从73.31%提高到了77.72%,变好的区域集中于石家庄西部山地地区;石家庄RSEI和NDVI、NDSI关系相较于WET、LST更为密切.石家庄生态环境质量整体较好,应继续增加绿化面积,实现生态环境保护和经济的协调发展.

This paper evaluated the quality of ecological environment in Shijiazhuang area to provide basis for the management and protection of ecological environment in this area. We selected the Landsat TM and landsat-8 OLI images of five time points from 2001 to 2018, and extracted four indexes of green degree, humidity, dryness and heat degree. We combined the principal component analysis to obtain the remote sensing ecological index RSEI, so as to analyze the spatiotemporal evolution of ecological environment quality in Shijiazhuang area. The results show that the RSEI model can simulate the ecological environment quality in Shijiazhuang. From 2001 to 2018, the RSEI index of Shijiazhuang increased slightly;most areas in the study area are areas with good and excellent RSEI level, accounting for 77.72% from 73.31%, and the improved areas are concentrated in the western mountains;the relationship between RSEI and NDVI, NDSI is closer than that between wet and LST.The quality of ecological environment in Shijiazhuang is good as a whole, and the expansion of the city did not lead to a significant decline in RSEI level. The evaluation results provide a scientific basis for the management and protection of the ecological environment in Shijiazhuang and the development of the integration of Beijing, Tianjin and Hebei, so we should continue to increase the green area and realize the coordinated development of ecological environment protection and economy.