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《Environmental Science & Technology》 2012-01
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Spatial and Temporal Variations of Vegetation Coverage in Coastal Peri-urban Area:A Case Study of Laoshan District,Qingdao

LUY Lin1,2,MA An-qing1,2*,MA Qi-min1,2(1.School of Environmental Science and Engineering,Ocean University of China; 2.Key Laboratory of Marine Environmental Science and Ecology of Ministry of Education,Ocean University of China,Qingdao 266100,China)  
Based on 1990,1997,2002 and 2008 Landsat TM images of Laoshan District in Qingdao City,and through the second sub-pixels of remote sensing and normalized difference vegetation index(NDVI),evolvement and spatiotemporal characteristics of vegetation coverage in the coastal peri-urban area was quantitatively studied.Results indicated that the evolvement of vegetation coverage in the area had the characteristics of rapid,variant and instable.From 1990 to 1997 is the period which vegetation coverage decreased the most sharply from 48.71% to 24.74%.In 2002~2008,vegetation coverage was recovered,with average coverage vegetation increasing from 23.58% to 44.49%.Analyzing spatial changing characteristics in the whole area,vegetation coverage was appeared dispersive and out-of-order,topographic conditions were of great importance to the distribution of the vegetation and the process of vegetation coverage changes.Analyzing the reasons for the degeneration of vegetation coverage from climatic factors to human activities,based on correlation analysis between precipitation and vegetation coverage,the areas with significant correlations was divided.Principle component analysis method was performed on the influence factors,and results indicated that urbanization is a principle reason leading to the degeneration of vegetation coverage made off in Laoshan District.
【Fund】: 典型北方缺水城市湖泊水质水量保障与生态环境改善技术课题(2008ZX07106-003)
【CateGory Index】: Q948
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