摘要
城市空间生长是一个复杂的动态过程。基于人地关系地域系统理论,搭建城市空间生长的分析框架,运用实地调研、文本分析与建设用地扩张空间格局分析等方法,解析三峡库区城市空间生长过程、周期演进特征与动力机制。研究发现:①移民迁建前,受地域自然环境的生态约束,三峡地区城市从逐水而居、自然生长的团状紧凑形态,逐渐发展为沿江延展、垂直生长的带状紧凑布局结构。移民迁建后,城市人口短时间内非自然增长式的快速集聚,以及社会经济快速发展对土地资源的强烈需求,促使三峡库区城市跨越地形地貌与江河环境的制约,呈现出复杂的时空格局与多元的形态类型。②三峡库区城市空间生长与地域自然环境之间存在3条正反馈路径与3条负反馈路径,城市空间生长的周期演进受“人工力的阶段性演变”“自然力的持续性作用”“特殊事件的跃迁发展”与“环境变迁的影响反馈”的综合驱动,从而实现城市空间生长的门槛跃迁与结构演化。③库区城市空间生长与地域自然环境的交互作用是一个双向互动、螺旋上升的周期演进过程,移民迁建前的城市空间生长周期与移民迁建后的城市空间生长过程,共同构成三峡库区城市空间生长周期的独特“双环结构”,半淹没城市、全淹没城市与未淹没城市空间生长的周期演进特征各异,既存在周而复始的多周期生长进化,又出现多个新旧周期交叠的现象。
Urban space growth is a complex dynamic process.Based on the theory of man-land relationship regional system,an analysis framework of urban spatial growth is constructed.By means of field survey,text analysis and spatial pattern analysis of construction land expansion,the urban spatial growth process,periodic evolution characteristics and dynamic mechanism in the Three Gorges Reservoir area are analyzed.The results are as follows:(1)Before the relocation of the Three Gorges Reservoir area(TGRA),due to the ecological constraints of regional natural environment,the cities in the Three Gorges region gradually developed from a compact cluster living by river and growing naturally to a compact ribbon-like structure extending along the river and growing vertically.After the relocation of the Three Gorges Reservoir area,the rapid agglomeration of urban population in a short period of time of unnatural growth,and the strong demand for land resources due to the rapid social and economic development prompted the cities in the TGRA to overcome the constraints of topography and river environment,presenting complex spatial and temporal patterns and diversified forms.(2)There are three positive feedback paths and three negative feedback paths between urban spatial growth and regional natural environment in the TGRA.The periodic evolution of urban space growth in the study area is comprehensively driven by"the phased evolution of artificial forces","the continuous effect of natural forces","the transition of special events"and"the influence feedback of environmental changes",so as to realize the threshold transition and structural evolution of urban space growth.(3)The interaction between urban space growth and regional natural environment in the TGRA is a two-way interactive and spiraling cycle evolution process.The urban space growth cycle before the relocation and the urban space growth process after the relocation constitute a unique"double-ring structure".The periodic evolution characteristics of spatial growth are differe
作者
王华
赵万民
周国华
WANG Hua;ZHAO Wanmin;ZHOU Guohua(School of Geographic Science,Hunan Normal University,Changsha 410081,China;Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region,Ministry of Natural Resources,Changsha 410118,China;Key Laboratory of Geographic Big Data Development and Application in Hunan,Changsha 410081,China;Faculty of Architecture and Urban Planning Chongqing University,Chongqing 400023,China)
出处
《地理研究》
CSCD
北大核心
2023年第3期660-681,共22页
Geographical Research
基金
自然资源部南方丘陵区自然资源监测监管重点实验室开放基金重点项目(NRMSSHR2022Z10)
国家自然科学基金项目(51678086)
湖南省自然科学基金项目(2020JJ4056)。
关键词
城市空间生长
演进过程
动力机制
生命周期
三峡库区
urban space growth
evolution process
dynamic mechanism
life cycle
Three Gorges Reservoir area
