引用本文:郭煜琛, 田国行, 赵芮, 申鑫杰, 董宝宝, 何瑞珍.2000-2013年中国主要城市空间形态变化研究[J].西南大学学报(自然科学版),2019,41(5):139~148
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2000-2013年中国主要城市空间形态变化研究
郭煜琛, 田国行, 赵芮, 申鑫杰, 董宝宝, 何瑞珍
河南农业大学 林学院, 郑州 450002
摘要:
以Landsat TM/ETM+影像为数据源,提取出2000-2013年我国29个主要城市建成区用地信息,测算了各城市的扩张速度、紧凑度、分形维数和形状指数,并运用相关性分析研究了影响城市形态变化的因素,研究发现:城市扩张速度明显加快,且速度大小呈现出东部、中部、东北、西部依次递减的规律;城市空间紧凑度下降,城市总体呈现分散化扩张;城市分维数增加,城市空间破碎度增强;形状指数总体呈现增加趋势,城市形状更加复杂化;人口、经济、交通、城市建设因素与城市建成区面积之间存在显著正相关,是城市扩张的主要驱动因素;地形因素与建成区面积、紧凑度呈显著负相关,与分形维数、形状指数呈显著正相关;地形对城市扩张表现出明显的制约作用,地形的复杂化降低了城市紧凑度,增加了分形维数和形状指数,使城市形状趋于复杂;地形的影响力在西部地区更为明显,并且不同范围内的地形影响力也不同,存在一定的梯度效应.
关键词:  城市空间形态|城市扩张|形状指数|相关性分析|中国城市
DOI:10.13718/j.cnki.xdzk.2019.05.020
分类号:TU984.2
基金项目:国家自然科学基金项目(31470029);河南省科技厅产学研资助项目(142107000101);河南省交通厅科技攻关项目(2014Z06).
A Study of the Changes in Urban Spatial Morphology of Major Chinese Cities During 2000-2013
GUO Yu-chen, TIAN Guo-hang, ZHAO Rui, SHEN Xin-jie, DONG Bao-bao, HE Rui-zhen
College of Forestry, Henan Agricultural University, Zhengzhou 450002, China
Abstract:
In a study reported in this paper, a total of 29 major cities of China were selected as the research object. Central built-up areas in 2000 and 2013 were extracted from multi-temporal and multi-band Landsat TM/ETM+ remote sensing satellite imagery with the help of ArcGIS. Expansion speed, compactness index, fractal dimension and shape index were calculated to analyze the spatio-temporal characteristics of urban spatial morphologic evolution. Finally, based on correlation analysis, we gave an in-depth analysis of the correlation between natural and social factors and urban morphology. The results showed that eastern cities had the highest expansion speed, followed in order by central, northeastern and western cities, during the period from 2000 to 2013. Overall, urban spatial compactness declined, urban fractal dimension increased and the shape of cities became more and more dispersed; the shape index showed an increasing trend and the shape of the cities was more diverse. The acreage of the urban built-up areas was in a significant positive correlation with population, economy, transportation and urban construction, and was the main driving factor for urban expansion. The factor of terrain was in a significant negative correlation with the acreage of the urban built-up areas and compactness of cities, and in a significant positive correlation with their fractal dimension and shape index. The terrain caused an obvious restriction on urban expansion. The complexity of terrain reduced the compactness of cities, increased their fractal dimension and shape index, thus making their shape more complicated. The influence of terrain was more obvious in the western region of the country and usually changed depending on the distance from the city center.
Key words:  urban spatial morphology|urban expansion|shape index|correlation analysis|Chinese city
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