论文部分内容阅读
快速城市化改变了下垫面物理性质和地气相互作用,影响了气候及环境变化,如何通过合理的时空尺度对我国城市过程进行监测与认知是我国城市化发展战略的迫切需求。以京津冀城市群为研究区,利用改进的夜晚灯光指数(VANUI)对京津冀城市群2001~2012年的城市化发展过程进行了监测,对比了VANUI指数与传统夜间灯光指数对城市区域的监测能力差异及其优势所在,为京津冀地区未来城市化发展战略规划服务。结果表明,VANUI城市指数能很好地弥补夜晚灯光指数在城市区域饱和的缺陷,并能够较好地反映城市区域的空间格局及相应的细节信息。根据VANUI结果,2001~2012年间京津冀城市群扩张了约一倍,其中城市扩张速度最快的为河北省唐山市。从整个研究区域来看,在此10年间,VANUI以接近线性的发展趋势增加,从统计结果来看,2004~2007年及2009~2012年为研究区域VANUI普遍增长的时期。
Rapid urbanization has changed the physical properties of the underlying surface and the interaction between earth and gas, affecting climate and environmental changes. How to monitor and recognize urban processes in China through reasonable time and space is an urgent need of urbanization development strategy in our country. Taking Beijing-Tianjin-Hebei urban agglomeration as the research area, the improved night light index (VANUI) was used to monitor the urbanization process of the urban agglomeration in Beijing, Tianjin and Jiadang from 2001 to 2012. The comparison between the VANUI index and the traditional night light index Monitoring capacity differences and their advantages, for the future Beijing-Tianjin-Hebei urban development strategic planning services. The results show that VANUI city index can make up for the flaw of night light index saturation in urban area and can well reflect the spatial pattern and corresponding details of urban area. According to the results of VANUI, the urban agglomerations in Beijing, Tianjin and Jiadu doubled from 2001 to 2012, of which Tangshan City, Hebei Province, was the fastest growing city. From the perspective of the entire study area, VANUI has been growing at a nearly linear trend over the past 10 years. From the statistical results, the period from 2004 to 2007 and from 2009 to 2012 was the period where VANUI generally grew.