1990—2020年于桥水库流域景观格局时空演变及驱动力  

Spatiotemporal changes and driving forces of landscape patterns in the Yuqiao Reservoir watershed during1990—2020

作　　者：刘凯 杨琰瑛 师荣光 李青 吴犇 郑宏艳 米长虹 LIU Kai;YANG Yanying;SHI Rongguang;LI Qing;WU Ben;ZHENG Hongyan;MI Changhong(Agro-Environmental Protection Institute,Ministry of Agriculture and Rural Affairs,Tianjin 300191,China;Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China;Key Laboratory for Environmental Factors Control of Agro-Product Quality Safety,Ministry of Agriculture and Rural Affairs,Tianjin 300191,China;Tianjin Yuqiao Reservoir Management Center,Tianjin 300074,China;Tianjin Academy of Eco-Environmental Sciences,Tianjin 300191,China)

机构地区：[1]农业农村部环境保护科研监测所,天津300191 [2]中国农业科学院研究生院,北京100081 [3]农业农村部农产品质量安全环境因子控制重点实验室,天津300191 [4]天津市于桥水库管理中心,天津300074 [5]天津市生态环境科学研究院,天津300191

出　　处：《农业资源与环境学报》2023年第1期154-164,共11页Journal of Agricultural Resources and Environment

基　　金：国家自然科学基金项目(42001264)。

摘　　要：景观格局时空演变是土地利用变化最直观的表现形式,剖析流域景观格局变化及其驱动力,对流域土地利用管理及水质保护具有重要意义。以于桥水库流域1990、2000、2010年和2020年4期土地利用数据为基础,采用半变异函数法和移动窗口法分析土地利用时空变化及其景观破碎度、斑块形状和多样性变化,并使用灰色关联法分析变化的驱动因素。结果表明,1990—2020年,于桥水库流域内城镇建设用地、农村居民点和林地的面积分别增加了588.89%、24.19%和0.83%,耕地、草地和水域面积分别减少了15.14%、5.96%和3.13%。1990—2010年,城镇建设用地大幅增长,耕地、草地等大幅减少。2010—2020年,城镇建设用地的增长速率放缓,林地开始增加。30年间,整体景观水平上,流域景观破碎度和多样性增加,景观斑块形状趋于复杂化。类别水平上,耕地及草地破碎化,景观斑块形状更加复杂。城镇建设用地斑块密度指数(PD)和最大斑块指数(LPI)增加,平均斑块面积指数(MPS)大幅下降。于桥水库周边和遵化市城区是流域景观格局变化的两个中心。流域内景观格局变化与人口密度、农村人口数、规模以上工业企业数及年降雨量等社会和自然因素密切相关。城镇化和于桥水库水质保护工程是驱动流域土地利用与景观格局变化的主要原因。The spatiotemporal evolution of landscape patterns is the most intuitive manifestation of land-use change. Analyzing changes in watershed landscape patterns and their driving forces is of great significance for land-use management and water quality protection there.Changes in land-use, landscape fragmentation, patch shape, and diversity were analyzed using the semi-variogram and moving window methods based on the land-use data for the Yuqiao Reservoir watershed in 1990, 2000, 2010, and 2020. The driving forces of change were analyzed using Gray Correlation analysis. The results showed that urban construction land, rural settlements, and woodland increased by588.89%, 24.19%, and 0.83%, respectively, in the Yuqiao Reservoir Watershed during the period 1990—2020 while the areas of cultivated land, grassland, and water bodies decreased by 15.14%, 5.96%, and 3.13%, respectively. Construction land increased significantly, whereas cultivated land and grassland decreased significantly from 1990 to 2010. The growth rate of construction land has slowed while that of forest land increased from 2010 to 2020. At the landscape level, the fragmentation and diversity of landscapes increased, and the landscape patch shape has become more complicated in the last 30 years. Cultivated land and grasslands were more fragmented at the class level. The patch density index(PD)and largest patch index(LPI)of urban construction land increased, while the mean patch size index(MPS)decreased acutely. The changing center of the landscape pattern surrounds the Yuqiao Reservoir and urban Zunhua. Changes in landscape patterns were closely related to social, and natural factors, such as population density, rural population,industrial enterprises, and precipitation. Urbanization and water quality protection projects at the Yuqiao Reservoir were the main forces driving changes in land-use and landscape pattern change.

关 键 词：于桥水库流域 景观格局 移动窗口分析 灰色关联分析 驱动力 

分 类 号：P901[天文地球—自然地理学]