Urban Sprawl Pattern and Spatial Features of rümqi City during the Last 15 Years
HUANG Yue~(1,2),CHEN Xi~(1),BAO An-ming~(1),MA Yong-gang~(3) (1.Xinjiang Institute of Ecology and Geography,Chinese Academy of Science,rümqi Xinjiang 830011,China;2.Graduate University,Chinaese Academy of Science,Beijing 100039,China;3.College of Resources and Environment Science,Xinjiang University;rümqi Xinjiang 830046,China)
In this paper the urban land-use change and spatial features of the urban sprawl are studied on the base of rümqi images of 1987 and 2002.Under the support of RS and GIS software,the land use change information was obtained from 1987 to 2002;for better description of the change of land-use pattern,several landscape metrics were calculated by using the method of landscape ecology;then grade of building density was introduced as quantity index of the spatial features of urban sprawl.During the last 15 years from 1987 to 2002,land-use status of rümqi appeared a dramatic variation;the most important phenomenon was the remarkable increase of built-up area and the landscape pattern became more fragmentized and complicated.The urban sprawl of rümqi has directional differentia;the main sprawl directions are west,northwest and northeast.
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