Abstract
Abstract. With the process of people moving from rural to urban area, the urban land boundary expanded significantly. In this paper, the urban land areas of Qingdao were extracted by using remote sensing images from 2010 to 2018. The spatiotemporal pattern of urban expansion in Qingdao city was revealed. Furthermore, the land cover type of the urban expansion area and urbanization rate were also analyzed to study the quality of urban expansion in different counties. It has shown that over 95% land cover types are impervious in the build-up areas of Qingdao, e.g. Shibei and Shinan district. However, there are more forest and water land exist in the suburban counties. The urban land expansion rate and people urbanization rate are highly related.
Highlights
Urban land is an important living space for human being
Previous research has shown the land expansion pattern of different cities in China based on optical remote sensing images and night time light data (Chai and Li, 2018; Wang et al, 2019; Yu et al 2021; Li and Li, 2015)
To keep reasonability of spatiotemporal pattern analysis of urban land expansion, we defined the urban land according to satellite images characteristics
Summary
With the growth of population and increase of wealth, more and more people move from rural to urban area. Revealing the spatiotemporal pattern of urban expansion is with great meaningful for making decision to optimize land use patterns, and to promote the effective development of cities. Remote sensing is an ideal way to monitor the urban land expansion because the results obtained from remote sensing image are objective. Previous research has shown the land expansion pattern of different cities in China based on optical remote sensing images and night time light data (Chai and Li, 2018; Wang et al, 2019; Yu et al 2021; Li and Li, 2015). Most researches focus on urban boundary extraction, urban land expansions, revealing the spatiotemporal pattern (Gao et al, 2012; Wang et al, 2012). The quality of urban land expansion, including the land cover types in the built-up area, as well as the coordination between urban land expansion and population growth, were rarely mentioned
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