Authors: Ting Dong*, , Limin Jiao, Wuhan University
Topics: Urban Geography, Remote Sensing
Keywords: Urban form,growth pattern,quality of life,sustainability,urban planning
Session Type: Paper
Start / End Time: 8:00 AM / 9:40 AM
Room: Taylor, Marriott, Mezzanine Level
Presentation File: No File Uploaded
apid urban expansion with low spatial density has been occurring globally, causing significant changes in land cover and habitat that have huge impacts on environment, ecology and human well-being. Systematic investigation of quantitative measurement of urban form and its evolution across-national is still very inadequate. We explore the urban forms according to urban built-up area density decreasing gradients from the center to outward in two dimensions-centrality versus decentralization dimension associated with urban core areas, compactness versus sprawl dimension relating to suburban areas. A higher proportion of core area represents greater centrality, lower proportion greater decentralization. A higher proportion of suburban area represents greater sprawl, lower proportion greater compactness. We choose 27 cities with more than 1 million, but limited less than 10 million inhabitants in America, Europe, and China around the year 1990, 2000 and 2014. We find that (1) the majority of urban forms are either decentralized-sprawl or central-compact, and a few urban forms are central-sprawl, and no city exhibit the decentralized-compact form; (2) Cities in America, Europe and China show big differences of urban forms. Cities in America are more decentralized and sprawling, while cities in Europe and Chian are more central and compact. (3) The majority of cities became more central in the period of 1990-2000, while became more decentralized in the period of 2000-2010; the majority of cities became more compact in the period of 1990-2000, while became more sprawl in the period of 2000-2010.