黑龙江国土资源

城乡交错带是城乡要素流通的前沿空间，具有复杂的人地关系特征。为科学识别城乡交错带并揭示其动态演变规律，研究以哈尔滨市为研究区，基于土地利用数据构建信息熵模型，并结合中心引力集聚法，精准识别了近40年(1980-2020年)哈尔滨市城乡交错带的演变过程。研究结果表明：哈尔滨市城乡交错带呈现出明显的圈层形态，其空间演变特征可概括为“低速蔓延—跳跃扩张—内部分异”三个阶段。通过稳定、扩张、退化三种类型的城乡交错带划分，进一步揭示了其规模演变的动态特征。此外，参考以往研究，对城乡交错带的功能空间进行了定位与可视化分析，发现其主导功能由早期的“生产—生态复合”功能逐步向“生产—生活—生态”协调功能过渡。基于研究结果与哈尔滨市社会经济发展背景，提出城乡交错带演变的驱动因素主要包括经济驱动、政策驱动与环境驱动。根据演变特征，哈尔滨市城乡交错带的发展可划分为三个阶段：缓慢孕育期(1980-1990年),城乡要素微弱发展，空间扩张缓慢；快速发展期(1990-2010年),城市扩张显著，城乡交错带快速向城市偏移；稳定重构期(2010-2020年),城乡要素趋于协调，城乡一体化发展与空间重构逐步实现。创新点在于通过长时序土地利用数据与信息熵模型相结合，精准识别了城乡交错带的动态演变过程，并揭示了其功能转型与驱动机制，为未来国土空间规划与城乡一体化发展提供了科学依据。

The urban-rural fringe serves as a critical frontier for the circulation of urban and rural elements, characterized by complex human-land interactions.To scientifically identify the urban-rural fringe and reveal its dynamic evolution patterns, this study takes Harbin City as the research area and constructs an information entropy model based on land use data, combined with the central gravitational agglomeration method, to further accurately delineate the evolution of the urban-rural fringe over the past 40 years(1980-2020).The results indicate that the urban-rural fringe of Harbin exhibits a distinct concentric structure, with its spatial evolution is characterized by three stages: “low-speed expansion—leapfrog expansion—internal differentiation.”By classifying the urban-rural fringe into stable, expanding, and degrading types, the study further reveals the dynamic characteristics of its scale evolution.Additionally, drawing on previous research, this study spatially locates and visualizes the functional evolution of the urban-rural fringe, showing a transition from a production-ecological composite function to a coordinated production-living-ecological function.Based on the findings and the socioeconomic context of Harbin, the driving factors of the urban-rural fringe evolution are identified as economic, policy, and environmental drivers.The evolution of Harbin's urban-rural fringe can be divided into three stages: the slow gestation period(1980-1990),characterized by weak urban-rural interactions and slow spatial expansion; the rapid development period(1990-2010),marked by significant urban expansion and rapid outward shift of the urban-rural fringe; and the stable reconstruction period(2010-2020).During this period urban-rural elements became more coordinated, and integrated development and spatial restructuring were gradually achieved.The innovation of this study lies in the integration of long-term land use data with the information entropy model, enabling precise identification of the dynamic evolution of the urban-rural fringe and revealing its functional transformation and driving mechanisms.This research provides a scientific basis for future territorial spatial planning and integrated urban-rural development.