太阳成8722(中国)有限公司-GREEN NO.1

标题：Urban land density function: A new method to characterize urban expansion作者：Jiao, Limin

来源出版物：LANDSCAPE AND URBAN PLANNING 卷：139 页：26-39 DOI: 10.1016/j.landurbplan.2015.02.017 出版年：JUL 2015

摘要：Density analysis lies at the core of studies on urban expansion; however, many methods in urban land density analysis are arbitrary and suffer from the lack of an established foundation. We observed an "Inverse S-shape Rule" for urban land density that varies outward from an urban center by investigating 28 major cities in China at three time points. We proposed an inverse S-shaped function to formulate urban land density, which fit well for all of the cities in our sample using a nonlinear least squares fitting method. The parameters of the function explicitly describe the basic properties of an urban form. Based on the fitted functions, we derived an established method for the concentric partitioning of urban area and further proposed indicators to measure the urban compactness, urban expansion rate, and degree of urban sprawl. These indicators are practical for characterizing urban form and urban sprawl for either a single city or for multiple cities. A case study on major Chinese cities from 1990 to 2010 reveals that most of the cities expanded rapidly and became less compact and more dispersed during those two decades. However, most of the cities grew faster and showed more sprawl in the second decade compared to the first one. Discussions show that the model is also applicable for non-monocentric cities and possibly can be applied to many other geographical phenomena.

入藏号：WOS:000355353200003

文献类型：Article

语种：English

作者关键词：Urban land density, Inverse S-shape Rule, Urban expansion, Urban form, Urban sprawl

扩展关键词：QUANTIFYING SPATIOTEMPORAL PATTERNS; LANDSCAPE METRICS; GROWTH; CITIES; SPRAWL; CHINA; FORM; COMPACTNESS; IMPACTS; SHAPE

通讯作者地址：Jiao, Limin; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.

电子邮件地址：lmjiao027@l63.com

地址：[Jiao, Limin] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Peoples R China.

[Jiao, Limin] Wuhan Univ, Minist Educ, Key Lab Geog Informat Syst, Wuhan 430079, Peoples R China.

研究方向：Environmental Sciences & Ecology; Geography; Physical Geography; Urban Studies

ISSN：0169-2046

eISSN: 1872-6062