Analysis on the characteristics of urban expansion in Urumqi

Abstract

The urban spatial structure change caused by urban expansion is the most intuitive manifestation of urbanization in space. In this study, Landsat TM remote sensing image maps from 2000, 2010, and 2017 were used as the main data sources. A combination of supervised classification and manual visual interpretation was used to extract the current distribution maps of the three impermeable surfaces in Urumqi Based on the dynamic changes from 2000 to 2010 and 2000 to 2017, the changes in Urumqi's built-up areas from 2000 to 2017 were analyzed, and the characteristics and causes of urban expansion in Urumqi were analyzed. The results show that the interior of Urumqi city tends to be saturated. Due to the limitation of topographical factors outside the urban area, the overall urban form is axially distributed in a diagonal “T” shape. From 2000 to 2010, the area increased from 163.31km2 to 332.66km2, with a net increase of 169.35km2. The average annual growth rate was 10.37%, and from 2010 to 2017, the area increased to 434.02km2, a net increase of 101.36km2, the average annual growth rate was 3.05%. The average annual growth rate from 2000 to 2010 was greater than 2010 to 2017; Comparing the area and changes of various jurisdictions, the development advantages of the new urban area are obvious. From 2000 to 2010, the development advantages of the new urban area were obvious. Midong District and Toutunhe District developed rapidly, while Shaibak District had the fastest growth.