Abstract
The Pearl River Delta urban agglomeration is one of the fastest-growing urbanization area in China. In order to quantitatively study the spatiotemporal change characteristics of urbanization and reveal the evolution mechanism of it, this paper chooses central Dongguan city, a typical highly urbanized area as a case study. The DEM data of Dongguan city with a spatial resolution of 30m×30m was used to automatically extract the river system and drainage catchment in central Dongguan city, and 7 basins were extracted. Based on a total of 12 land use/cover change from 1987 to 2015 in Dongguan city, combined with single land use dynamic degree and integrated land use dynamic degree, the types and changes of land cover in each catchment unit were quantitatively analysed. The analysis results revealed the spatial and temporal characteristics of the land use in each catchment in downtown Dongguan city, showed the law of land cover evolution process in the past 30 years in central Dongguan city, which provided the ideas for the study of urbanization evolution mechanism in the Pearl River Delta urban agglomerations.
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