摘要:
利用1992—2013年间覆盖杭州市的DMSP/OLS夜间灯光(nighttime light,NTL)数据,结合相关社会经济统计资料,采用分区阈值提取等方法提取杭州市各县、市的城镇区域面积,分析NTL数据与城镇化进程的关系及杭州市城镇化扩张模式;选取景观生态学相关研究方法,引入景观格局与斑块概念,结合主要交通线分布,对杭州市城镇化进程及格局进行分析.研究结果表明,利用NTL数据进行城镇化研究具有一定可行性.杭州市城镇化扩张表现为后期加速型,城镇化发展在2000年以前主要集中在主城区;2000年以后,随着经济社会的发展,城镇化开始沿主要交通线呈面状分散发展,城镇化速度及水平全面提升,发展方式及发展重心都呈现出一定的转变.运用DM-SP/OLS NTL数据从市域层面展开城镇化相关研究,并引入景观生态学相关概念,对城镇化研究以及城市规划有一定的借鉴意义.
Abstract:
The DMSP/OLS nighttime light ( NTL ) data provide an effective approach to characterizing the urbanization progress of cities, especially its spatial-temporal changes. In this paper, the authors combined the DMSP/OLS NTL data with the social economic statistics to examine the urban expansion of Hangzhou City, the capital of Zhejiang Province in eastern coastal region of China, during the period of 1992―2013. The relationship between urban expansion and traffic lines were also detected with the concept of landscape pattern and patches. The results show that the urbanization in Hangzhou City before 2000 was quite slow, and there existed an accelerated process since 2000 due to the development of economy, with the urbanization region also converted from central downtown to other areas along with the process. Further research indicates that the urbanization process in Hangzhou City has a great relevance with transportation in terms of direction and pattern, which might be attributed to the terrain and local condition. It is a novel attempt to investigate the urbanization of Hangzhou City on the basis of the DMSP/OLS NTL data and concepts of landscape, which would provide a significant guideline for the urban planning and development.
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