广西科学2026，Vol.33Issue(1)：64-77,14.DOI:10.13656/j.cnki.gxkx.20250909.001
平陆运河流域生态环境时空变化特征及生态安全评价
Characteristics of Spatiotemporal Changes in Ecological Envi-ronment and Ecological Security Evaluation in the Pinglu Canal Basin
摘要
Abstract
The mutual feedback mechanism between major infrastructure and ecological environment is a key scientific issue for achieving sustainable development.Taking the Pinglu Canal Basin as the object,this study integrated remote sensing data,statistical yearbooks,and Digital Elevation Models(DEM)to construct an ec-ological security evaluation system based on the"Pressure-State-Response"(PSR)framework.The spatio-temporal variation characteristics of the Environmental Sustainability Index(ESI)in the study area in 2005,2015,and 2025 were analyzed,and the dominant factors affecting ecological security were identified based on the obstacle degree model.The results are summarized as follows:① From 2005 to 2025,the areas of culti-vated land and water body kept decreasing,while those of forest and construction land increased by 979.79 km2 and 236.65 km2,respectively.Little changes were observed in areas of wetland and unutilized land.② ESI first increased and then decreased,with the proportion of high-value areas being 16.32%,18.53%,and 18.01%in 2005,2015,and 2025,respectively.There was a significant spatial difference in the overall ecologi-cal environment quality of the basin.③ The ecological security pattern presented significant spatial agglomer-ation,and the construction of major infrastructures such as ports and canals caused significant disturbance to the surrounding ecological environment.④ Population density,landscape diversity,road network density,vegetation coverage,and per capita disposable income were the main obstacles to ecological security.The ob-stacle degree of the pressure layer kept increasing;the obstacle degree of the response layer decreased;and the obstacle degree of the state layer showed fluctuations.Given the lagging nature of spatial spillover effects of major infrastructures,strengthening ecological monitoring and restoration measures throughout the construc-tion and operation periods is a necessary guarantee for achieving coordinated evolution of regional socio-econ-omy and ecological environment.关键词
生态环境/PSR模型/环境可持续指数/空间自相关/障碍因子诊断模型Key words
ecological environment/PSR model/environmental sustainability index/spatial autocorrelation/obstacle factor diagnosis model分类
资源环境引用本文复制引用
景涛,王帅成,李金燕,程娟..平陆运河流域生态环境时空变化特征及生态安全评价[J].广西科学,2026,33(1):64-77,14.基金项目
2024年度广西高等教育本科教学改革工程项目"AI-STEAM融合创新理念下艺术院校城市设计培养体系架构研究"(2024JGZ149)资助. （2024JGZ149）
