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Pattern and mechanism of urban spatial growth in Nanjing City, 1979-2007

Ecological Economy 2010年第3期6卷 272-282页

作者： ZHANG Zhen-long MA Guo-qiang School of Architecture and urban Planning Suzhou Universi.ty of Science and Technology Suzhou 215011 P R. China Department of urban and Regional Planning Nanjing University Nanjing 210093 P R China

urban spatial growth has become a hot topic of geographic science and urban research. Exploring the patterns and mechanisms of urban growth is the prerequisite to understand the urbanization process of China. The paper provides a spatial analysis method of using Remote Sensing （RS） and Geographic Information System （GIS）. and presents major patterns and mechanisms of urban spatial growth during the period from 1979 to 2007 in Nanjing City. Firstly, the paper introohwes the data, study area and methodology of the research. Then. the patterns of urban spatial growth are identified Subsequently, the main mechanisms of urban spatial growth are analyzed Finally some conclusions are drawn definitely. The features of urban spatial growth in Nanjing are as follows： during 1979-1988, urban spatial growth of each district was stow. and the inner growth was in excess of suburban growth; during the period of 1988-2000. urban growth of suburban was in excess of inner city. the most insensitive growth appeared in the southeast, and the growth of each aspect was relatively insensitive expect ecst and west; during the period of 2000-2007, urban growth of suburban was violent, the most insensitive growth appeared in the southeast. and the urban growth of each direction was insensitive except the west. The mechanisms of urban spatial growth are complex, the main ones of which are social and economic development. Besides. the guiding of urban planning and influence of urban spatial structure are quite obvious.

关键词： urban spatial growth Patterns Mechanism GIS: Nanjing

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Cassini growth of Population Between Two Metropolitan Cities——A Case Study of Beijing-Tianjin Region,China

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Chinese Geographical Science 2009年第3期19卷 203-210页

作者： ZONG Yueguang YANG Wei MA Qiang XUE Song School of Geographic and Oceanographic Sciences Nanjing University Nanjing 210093 China

The existing models of population distribution often focus on the region with a single city or even multiple centers, and lack the detailed explorations of the common and special type of urbanization areas with two centers. Taking Beijing-Tianjin region of China, which is a distinct dual-nuclei metropolitan area in the world, as an example and choosing Landsat-5 TM image in 2005, population, etc. as the data, this paper devotes to comprehending and illustrating a model of Cassini growth of population between the two metropolitan cities through the research of spatial population distribution pattern, aided with RS and GIS techniques. Main technical processes include Kriging interpolation of the population data and character simulation of the Cassini ovals. According to the calculation of a/b, a key characteristic index of Cassini growth model, the spatial structures of population distribution were given. When a/b〈 1, it is a curve with two separated loops with a population density more than 3000 persons/km^2. When a/b=1, it is a lemniscate curve with a population density about 3000 persons/km^2. When 1〈a/b〈 √2, it is a dog-bone shaped concave curve with a population density between 500-3000 persons/km^2. When a/b= √2, it is an oblate curve with a population density about 500 persons/km^2. When a/b〉 √2, there is an oval-shaped convex curve with a population density less than 500 persons/km^2. The results show that owing to the combined action and influence of the regional dual-nuclei, the population distribution of Beijing-Tianjin region is in accord with Cassini model significantly. Therefore, there is Cassini growth of population between the two metropolitan cities in Beijing-Tianjin region. In addition, the process of Cassini growth has extraordinarily instructive significance for judging the development stages of the dual-nuclei metropolitan areas.

关键词： metropolitan city dual-nuclei metropolitan area urban spatial growth Cassini growth model Beijing-Tianjin region China

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经济学视野下的中国城市空间扩展

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区域与城市经济 2016年第3期

作者：洪世键张京祥

城市空间扩展是城市经济学和城市地理学研究领域的重要课题。改革开放之后，随着经济的快速发展和城市化进程的推进，中国城市的空间范围也迅速扩展。近年来关于中国城市空间对外扩展的研究成果日益增多，但现有的实证分析和理论模型，... 详细信息

城市空间扩展是城市经济学和城市地理学研究领域的重要课题。改革开放之后，随着经济的快速发展和城市化进程的推进，中国城市的空间范围也迅速扩展。近年来关于中国城市空间对外扩展的研究成果日益增多，但现有的实证分析和理论模型，并没有揭示中国城市空间快速扩展的独特因素及其根本动力，特别是忽略了地方政府在其中发挥的关键性作用。本文以城市经济学相关理论模型为基础，结合中国体制背景，构建一个以地方政府为核心的城市经济模型，并运用该模型对中国城市空间扩展及其相关问题进行分析，认为地方政府在中国农地非农化及其土地开发中发挥决定性的作用，现实农业土地租金较低推动了城市空间的额外扩展，外部性收益使得地方政府零地价出让土地仍然有利可图，诸如铁路及其站点建设等外部条件冲击推动城市以蛙跳(飞地)方式对外扩展。

关键词：城市空间扩展城乡“二元化”土地市场投标租金模型地方政府 urban spatial growth dual urban-rural land market bid-rent model local government

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