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《Acta Agriculturae Jiangxi》 2015-12
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Research on Change Degree and Scale Effect of Land Use in Eastern Coastal Zone of Haikou City

LIU Chao-hai;LI Zheng-hui;WANG De-zhi;Yunnan Institute of Aerial Photogrammetry and Remote Sensing Information;College of Land Resources Engineering,Kunming University of Science and Technology;  
Taking TM( 1991) and ALOS( 2010) remote sensing images of eastern coastal zone of Haikou city as data sources,based on the deep analysis of transfer matrix of land use,we proposed the change degree index of land use based on the natural ecological impact,carried out the spatial auto-correlation and interpolation studies on the land use change degree of the studied region which was divided into different sizes of regular grids,and researched their spatial distribution characteristics. The following conclusions were obtained:( 1) As the land scale increased,the value range and variability of land use change degree reduced,but its mean value changed little,and all sample data approximately accorded with the normal distribution.( 2) When the land scale became larger,due to the effects of aggregation and zoning of land use patches,the spatial distribution evenness of land use change degree increased,showing a spatial auto-correlation in far distance; the role of random factors gradually increased,but the global spatial auto-correlation exhibited a waning trend.( 3) The smaller the grid cell was,the more detailedly the land use change information was presented,but the global information features were concealed; the larger the grid cell was,the more obviously the overall characteristics were displayed,but the local information data were weakened,causing the loss of part of original data information.( 4) When TM/ALOS was used as data sources,the optimum analytical size of grids was 500 m. From 1991 to 2010,the area of land whose use deviated from the natural ecological direction and had strong variations accounted for 20.70% of the total area in the studied region; the region tending to the natural ecological direction with strong variations accounted for only 2.48% of the total area; the proportion of land use with insignificant change was the largest. The scale effect of land use change degree was different from that of economy and population.
【CateGory Index】: F301.2
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