基于京津冀功能分区的植被覆盖度时空演变特征及其影响因子  

A functional zoning-based study of the spatiotemporal evolutionary characteristics and influencing factors of vegetation fractional cover in the Beijing-Tianjin-Hebei region

作　　者：鲁军景 孙雷刚[1,2] 左璐 刘剑锋 马晓倩[1,2] 郝庆涛 LU Junjing;SUN Leigang;ZUO Lu;LIU Jianfeng;MA Xiaoqian;HAO Qingtao(Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050011,China;Hebei Technology Innovation Center for Geographic Information Application,Shijiazhuang 050011,China)

机构地区：[1]河北省科学院地理科学研究所,石家庄050011 [2]河北省地理信息开发应用技术创新中心,石家庄050011

出　　处：《自然资源遥感》2024年第4期242-253,共12页Remote Sensing for Natural Resources

基　　金：河北省科学院科技计划项目“河北省区域生态质量动态监测评价及提升研究”(编号:21104);河北省科学院重点学科项目“资源环境保护与区域可持续发展重点学科建设”(编号:491-0401-YBN-DDH4);河北省科学院高层次人才培养与资助项目“基于遥感植被指数时间序列的人工林演变研究”(编号:2020G03);河北省科学院地理科学研究所科技计划项目“区域蓝绿空间信息提取及模拟优化研究”(编号:D21002)共同资助。

摘　　要：基于1985—2020年Landsat数据估算8期京津冀年度植被覆盖度(vegetation fractional cover,VFC),采用Sen趋势分析和Mann-Kendall检验,全面分析京津冀协同发展4大功能分区(4区)VFC时空变化特征,并运用地理探测器从静态和动态多角度探究气候因素、自然因素和人为因素多重影响因子及其交互作用对区域VFC的影响程度和作用机制。结果表明:①1985—2020年,京津冀植被覆盖情况整体较好,其中南部功能拓展区(南部)>西北部生态涵养区(西北部)>中部核心功能区(中部)>东部滨海发展区(东部)。②1985—2020年,京津冀VFC总体以0.097%/10 a的增速呈波动上升的趋势,空间演变呈“西高东低”的分布格局,其中改善区域主要分布在西北部燕山-大马群山-太行山,退化区域主要分布在中部、东部和南部各市县建成区及周边地区。③单因子层面,“4区”VFC空间分异的主次控因子具有显著差异,其中土地利用类型和土壤类型解释能力均较强;影响因素层面,中部和南部VFC空间分异的主要影响因素为人为因素,东部为人为因素和自然因素,西北部为气候因素和自然因素。④土地利用类型在各年份对“4区”VFC的解释能力均较强,且总体呈增加的趋势;土壤类型在东部和西北部q值均较大,但在西北部呈下降的趋势;次控因子在不同分区的年际解释能力不同。⑤影响因子均呈不同程度的增强作用,不存在相互独立或减弱的现象,且气象因子是最主要的交互对象。Based on 1985-2020 Landsat data,this study estimated eight phases of annual vegetation fractional cover(VFC)of the Beijing-Tianjin-Hebei region.Using the Theil-Sen Median and Mann-Kendall trend analyses,this study comprehensively analyzed the spatiotemporal variation characteristics of VFC in four major functional areas for the coordinated development of the Beijing-Tianjin-Hebei region.Furthermore,employing geodetectors,this study explored the degrees and mechanisms of the impacts of climatic,natural,and anthropogenic factors,along with their interactions,on the regional VFC from both static and dynamic perspectives.The results indicate that from 1985 to 2020,the Beijing-Tianjin-Hebei region exhibited sound vegetation coverage overall,which decreased in the order of the southern functional expansion area(SFEA),the northwestern ecological conservation area(NECA),the central core functional area(CCFA),the eastern coastal development area(ECDA).The VFC of the Beijing-Tianjin-Hebei region trended upward while fluctuating,with an increasing rate of 0.097%/10a.The VFC exhibited a spatial distribution pattern of high values in the west and low values in the east.Specifically,areas with elevated VFC were primarily distributed in the Yanshan,Damaqun,and Taihang mountains within the NECA,while those with reduced VFC were principally found in the built-up areas and their surrounding areas of cities and counties in the CCFA,ECDA,and SFEA.At the single-factor level,the primary and secondary factors controlling VFC across the four functional areas differed greatly,with land-use and soil types exhibiting higher interpretability.Regarding the influencing elements,the main factors driving spatial differentiation of VFC in the CCFA and SFEA included anthropogenic factors,those in ECDA comprised anthropogenic and natural factors,and those in NECA were dominated by climatic and natural factors.For the VFC of the four functional areas in all these years,the land use type manifested high interpretability,which trended upward overall.

关 键 词：植被覆盖度 时空变化 影响因子 地理探测器 功能分区 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]