生态科学2025，Vol.44Issue(3)：51-62,12.DOI:10.14108/j.cnki.1008-8873.2025.03.006
基于高分辨率卫星影像的北京城市绿地动态特征分析
Analysis on the dynamic characteristics of urban greenspace in Beijing based on high resolution satellite images
摘要
Abstract
Urban greenspace plays essential role in urban ecosystem and provides important ecosystem services.A clear recognition on the composition and change of urban greenspace is vital for urban planning and management.Previous studies have largely focused on the dynamic of urban greenspace using medium resolution remotely sensed data.However,the dynamic greenspace patches in urbanizing areas need to be accurately interpreted based on high resolution image data,because they are generally small but highly contribute to human health.Based on high resolution satellite images of 2016 and 2021,this study analyzed the dynamic change characteristics of urban greenspace within the sixth ring road of Beijing.The results showed that urban greenspace area in 2021 was 1131.40 km2,with forest,grassland and farmland accounting for 73.34%,22.79%and 3.87%,respectively.The urban greenspace area increased by 34.59 km2,or 3.15%in proportion from 2016 to 2021.The increased greenspace types were mostly plain afforestation and park forest land.From 2016 to 2021,the amounts of gain and loss of greenspace were 149.07 km2 and 114.48 km2,respectively,accounting for 6.57%and 5.04%of the entire study area.The gain and loss of urban greenspace mostly converted with construction land.The land cover types conversion occurred mainly in the southwest of the city and the areas between the fifth and sixth ring roads.The urban greenspace in second to sixth ring roads was very dynamic,with the change rates ranged from 12.78%to 25.70%.Due to the limited lands for greening in urbanized areas,the new greenspace patches were generally small,which required high resolution image data to interpret.In the past 5 years,urban greenspace cover rate increased and patches fragmentation decreased,the new patches enhanced the connectivity of urban greenspace.Additionally,the greenspace patches were more aggregated and continuous from second to sixth ring roads.Our study indicated that urban greenspace in well-developed city regions will be experiencing great changes,even over a short time period.In recent years,Beijing has made notable progress in greening,and the quantity and quality of greenspace have been improved.关键词
城市绿地/绿地动态/景观格局指数/土地覆被/高分辨率卫星影像Key words
urban greenspace/greenspace dynamics/landscape pattern metrics/land cover/high resolution satellite images分类
资源环境引用本文复制引用
张蔷,李令军,鹿海峰,刘保献,赵文慧,李琪,秦丽欢,陈韵如..基于高分辨率卫星影像的北京城市绿地动态特征分析[J].生态科学,2025,44(3):51-62,12.基金项目
国家重点研发计划资助项目(2021YFC1809000) （2021YFC1809000）
