中部3省城市建设用地功能时空演化特征

定量识别区域城市建设用地功能演化特征与模式,是推进可持续城市建设用地开发利用与管理、助力新型城镇化等国家战略的重要基础。从人口承载、生产与消费、公共服务3个方面构建了城市建设用地功能评价指标体系与模型,以地级市为研究单元探究了2000~2014年期间我国中部3省多尺度城市建设用地功能演化特征与模式。研究结果表明:(1)中部3省城市建设用地人口承载、生产与消费、公共服务和综合功能总体呈改善趋势,但演化过程复杂;(2)不同尺度尤其是城市群地区城市建设用地功能演化特征差异明显。沿长江和城市群地区城市建设用地功能演化强度高,但城市群地区空间异质性较强;(3)城市建设用地功能演化以复合型演化模式为主,演化格局复杂。其中,城市建设用地人口承载功能演化模式类型最多,且局部地区呈衰退型演化格局;城市建设用地生产与消费、公共服务功能和综合功能演化模式类型相对较少,且大多集中连片分布,武汉城市建设用地综合功能加速改善型演化特征显著。如何深入探究城市建设用地功能演化模式形成机理,并系统制定多级城市建设用地可持续利用管理策略,是实现我国新型城镇化和"美丽中国梦"等战略的重要任务。

SPATIOTEMPORAL CONVERSIONS OF URBAN BUILT-UP LAND FUNCTION IN THREE PROVINCES FROM CENTRAL CHINA

Quantitative identifications of functional urban built-up land dynamic characteristics and patterns are the important foundation to promote the national strategies,which including the sustainable urban built-up land use and facilitating neo-urbanization and initiatives..This study developed an index system and corresponding models for estimating urban built-up land function from three aspects,namely population capacity,production and consumptions,and public services.In this paper the functional evolution and pattern of urban construction land are explored in central China(Hubei,Hunan and Jiangxi provinces) at multi-scale during the period from 2000 to 2014.The results are as follows:(1) the trend of the population capacity,production and consumptions,and the integrated function of cities located in Hubei,Hunan and Jiangxi provinces showing a growing trend,and the temporal processes were relatively complex (2) varied dynamic characteristics of urban built-up land functional changes were observed in districts at different scales,especially in metropolitan areas.Specifically,cities located in areas along the Yangtze River and metropolitan regions generated high values of development index of urban built-up land,and spatial heterogeneity is strong in metropolises;(3) it was dominated by the mixed evolution pattern for the dynamic functional urban built-up land which made the landscape of urban built-up land functional conversions much more complex.In addition,the large types of dynamic urban built-up land function in population containing were gained with significant trend dominated by decreasing patterns.It was discovered that relatively ordinary dynamic of urban built-up land function in production and consumptions,public services and comprehensive function which were contiguous in space.Significant increasing improved dynamic mode in comprehensive urban built-up land function was also discovered particularly in Wuhan.Studies on the mechanisms of dynamic patterns of urban built-up land function and the sustainable multi-level urban land management strategies are desired for approaching ne-urbanization and beautiful China.