潮白河北京段绿地变化特征及驱动因素分析  

Analysis on variation characteristics and driving factors of green space in Beijing section of Chaobai River

作　　者：侯文星 张鐥文 王丽丽 杨冉 赵文吉[1] HOU Wenxing;ZHANG Shanwen;WANG Lili;YANG Ran;ZHAO Wenji(College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China)

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048

出　　处：《地球环境学报》2025年第1期77-88,共12页Journal of Earth Environment

基　　金：国家自然科学基金项目(42071422)。

摘　　要：潮白河作为北京市重要水源之一,对其生态进行合理规划和有效治理不可或缺。近年来北京市引水工程和造林计划对潮白河流域生态发展发挥重要作用,潮白河绿地空间格局也产生变化。研究近几年北京市内潮白河流域的绿色空间变化特征,对加强首都环境保护和巩固生态屏障,完善北京市域绿色空间结构意义重大。基于2015—2020年Sentinel-2A遥感数据,结合面向对象分类、景观格局指数和灰度关联分析等方法,从量化规模和空间格局的角度对北京市域内潮白河绿地的变化特征进行分析,并探讨潮白河流域绿地空间变化与不同因素的关联度情况。结果表明:(1)潮白河流域绿地面积明显增加,由2015年的26740.79 hm^(2)增至2020年的29727.49 hm^(2),绿地面积规模提升了11.17%。各区域空间上距离潮白河越近,绿地面积规模提升幅度越大。其中怀柔段绿地规模提升幅度最大,变化率为25.61%。(2)2015—2020年,潮白河流域斑块数量(NP)、斑块密度(PD)及形状指数(LSI)有所下降,区域绿地斑块破碎化程度减弱,绿地“斑块”呈现向“廊道”转变的趋势;区域绿地斑块聚合度指数(AI)提升了1.49,潮白河流域绿地斑块整体呈现面积规模上扩大、空间分布上聚集的特征。(3)自然因素对潮白河流域绿地变化的贡献程度高于社会因素,其中地表温度和地下水指标与潮白河区域绿地变化关联度较高,均为0.872,是影响潮白河区域绿地空间演变的重要驱动力。Background,aim,and scope As one of the important water sources in Beijing,the Chaobai River is indispensable for rational planning and effective management of its ecology.In recent years,Beijing’s water diversion projects and afforestation programs have important impacts on the ecological development of the Chaobai River Basin,and changes in the spatial pattern of green space in the Chaobai River have occurred.This study aims to delineate the recent transformations in the green space within the Chaobai River Basin in Beijing.Utilizing remote sensing technologies and spatial analysis,we aim to discern patterns of change,evaluate the ecological implications,and assess the efficacy of previous interventions.The expected outcomes of this research are anticipated to yield valuable insights into the dynamics of green space within the Chaobai River Basin.Moreover,this study will offer a replicable framework for evaluating green space changes in other urban basins,bolstering broader environmental conservation endeavors.By pinpointing areas that necessitate targeted interventions,this research will assist in augmenting ecological resilience and promoting biodiversity within the basin,thereby ensuring the long-term sustainability of this vital resource for Beijing.Materials and methods Based on the Sentinel-2A remote sensing data from 2015 to 2020,we used object-oriented classification method to extract green space information within the study area.At the same time,we analyzed the change characteristics of Chaobai River green space in Beijing from the perspective of quantitative scale and spatial pattern.In addition,this paper investigates the correlation between the spatial variation of green space and different factors in the Chaobai River Basin,using a gray correlation analysis that combines meteorological and economic data from recent years.Results The results show that during 2015-2020,(1)the green space area in the Chaobai River Basin has increased significantly,from 26740.79 hm^(2)to 29727.49 hm^(2),and the scale

关 键 词：绿地变化 面向对象 景观格局 灰色关联分析 潮白河 

分 类 号：TU984.115[建筑科学—城市规划与设计]