452 / 2019-02-27 22:07:48

Research on Spatial Expansion of Urban Agglomeration of Wuhan，Ezhou, Huanggang and Huangshi Based on DMSP_OLS Night Light Data

DMSP_OLS,urban space expansion,Wuhane Ezhou Huanggang Huangshi,night lights

全体主题 > Remote Sensing

In order to reveal the spatial and temporal law of spatial expansion in the urban areas of Wuhan, Ezhou, Huanggang and Huangshi (WEHH urban agglomeration areas), we extracted the urban regional boundaries from 1999 to 2010 based on DSMP/OLS night light data. With the help of GIS10.2 and landscape analysis software Fragstats4.2, a quantitative study about the spatial and temporal characteristics of regional expansion in the past 20 years in this region were conducted. The research shows that: (1) Wuhan has the highest hierarchy in WEHH urban agglomeration areas according to the area of the built-up area, other cities are far behind Wuhan and the regional development is extremely unbalanced. (2) WEHH urban agglomeration areas showed a trend of gradual expansion from Wuhan, as the center, to the surrounding areas. (3) From 1993 to 2005, the expansion rate of urban built-up areas was relatively slow and the growth rate was not obvious. From 2005 to 2013, the expansion rate was obviously accelerated. (4) The center of WEHH urban agglomeration areas is located between Wuhan and Ezhou, and it showed a "z" shape reciprocating trend. (5) The overall spatial pattern of the region sways between centralization and decentralization. On the one hand, the central cities are expanding outward; on the other hand, there are some newly developed far-away cities and small towns.