1.华东师范大学地理信息科学教育部重点实验室，上海200062； 2.中国科学院地理科学与资源所，北京100101； 3.Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, Colorado；4.华东师范大学环境遥感与数据同化联合实验室，上海200062
Researches on Changes of Urbanization of Shanghai and its Ecologic Environment Based on MODIS Time Series in the Last Decade
LI Zhi-hua 1,4, GAO Zhi-qiang 2, GAO Wei 3,4, SHI Run-he 1， LIU Chao-shun 4
1.Key Laboratory of Geographic Information Science for Ministry of Education, East China Normal University, Shanghai 200062, China； 2.Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China； 3.Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, Colorado, USA； 4.Joint Laboratory for Environmental Remote Sensing and Data Assimilation, East China Normal University, Shanghai 200062, China
In this paper, some change detection methods were used for assessment of urbanization and ecosystem changes. The urbanization area index (UAI) derived from land cover was used to reflect the speed of urban expansion, while the fraction of vegetation cover (FVC) retrieved from NDVI was used to represent the status of urban ecologic environment. The NDVI time series were derived from MOD13Q1 by using an annual stacking approach. Land cover maps were retrieved from annual NDVI time series from 2000 to 2009. This paper focused on the assessment study of urbanization level and ecologic environment changes in Shanghai. The results indicate that: (1) the urban area of Shanghai increased continuously in the past 10 years; (2) the UAI increased by an annual average rate of more than 1.73%, with its peak value being 4.36% during 2008-2009; (3) on the whole, FVC decreased continuously over the past decade, while the FVC of the urban area increased slightly and the FVC of some islands and outer suburbs increased slightly too; (4) the urban ecologic environment of Shanghai became more and more "green" at the cost of decreased cropland and natural vegetation cover. The assessment of urbanization and ecosystem changes suggests that suburban ecosystem protection is an important and urgent problem and the government should implement more effective environmental management policies.
黎治华, 高志强, 高炜, 施润和, 刘朝顺. 上海近十年来城市化及其生态环境变化的评估研究[J]. 国土资源遥感, 2011, 23(2): 124-129.
LI Zhi-Hua, GAO Zhi-Qiang, GAO Wei, SHI Run-He, LIU Chao-Shun. Researches on Changes of Urbanization of Shanghai and its Ecologic Environment Based on MODIS Time Series in the Last Decade. REMOTE SENSING FOR LAND & RESOURCES, 2011, 23(2): 124-129.
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2011, Vol. 23 
