Gradient analysis of landscape spatial and temporal pattern changes in Beijing metropolitan area

查看全文 作　　者：YANG YeTao1,ZHOU QiMing2,GONG JianYa3 & WANG YingYing4 1 Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China;2 Department of Geography,Hong Kong Baptist University,Hong Kong;3 State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430074,China;4 Hubei Provincial Bureau of Meteorology,Wuhan 430074,China

出　　处：《Science China(Technological Sciences)》索引2010年第53卷第S1期,共8页

基　　金：supported by the National Basic Research and Development Program ( '973' Project) (Grant No.2006CB701304);the Research Grants Council General Research Fund (HKBU 2029/07P);Hong Kong Baptist University Faculty Research Grant (FRG/06-07/II-76) 摘　　要：The gradient based landscape metrics analysis is now widely used to study the landscape pattern changes in respond to the urbanization.In order to discover the trend of spatio-temporal changes in Beijing metropolitan area during the past 15 years,several landscape metrics are computed using a moving window along a 96 km long transect across Beijing metropolitan area from west to east.Specially,the spatial extent of sub-landscape,which is determined by the moving window’s size,is profoundly examined.The results show that the metrics varies smoothly and regularly along the selected transect when the window size is greater than 6 km×6 km,and irregularly fluctuated for the smaller window size,that the spatial and temporal landscape characteristics of Beijing city match the hypothetical framework of spatio-temporal urban sprawl in the form of alternating processes of diffusion and coalescence well,and that some new trends of the urban sprawl style in Beijing metropolitan area,such as leap-frog manner,are also detected by the gradient landscape analysis. 关键词：GRADIENT analysis LANDSCAPE metrics SPATIO-TEMPORAL URBAN EXPANSION multi-extent

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Gradient analysis of landscape spatial and temporal pattern changes in Beijing metropolitan area

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