Municipal district expansion and built-up area expansion are two main forms of urban spatial expansion. They are unstable under high-speed urbanization in China. Geographic stability contains both stability of time and space. With the help of geometric methods, the paper constructs a coordinated system based on standardized values of built-up area and municipal district area. What's more, the paper draws spatial expansion paths of some typical cities from 2000 to 2010 and classifies them based on standardized mean value. Finally, three indexes which are called mov, tor and sd are used to calculate space-time stability. The results show that, (1) In recent years, municipal district expansion can often be found in the Yangtze River Delta region, Pearl River Delta region, southeastern Fujian and the capital cities of central and western China. However, built-up area expansion seems unpolarized and each urban agglomeration has high speed expansion. (2) The space-time paths can be divided into stable type and unstable type. Most of the stable types are LL, which means both municipal district and built-up area are below mean values, while most of the unstable types only have one transformation between HH, HL, LH and LL. (3) The cities with high rank are sensitive to mov & sd, which indicate stability difference between the cities and the whole country. But the cities with medium rank are sensitive to tor, which indicates interannual stability of a city.
WANG Kaiyong, QI Wei, DENG Yu
. The research on urban spatial expansion and its space-time stability in China since 2000[J]. GEOGRAPHICAL RESEARCH, 2014
, 33(7)
: 1195
-1206
.
DOI: 10.11821/dlyj201407001
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