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《Bulletin of Soil and Water Conservation》 2012-01
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Distribution Characteristics of Landuse Patterns at Different Terrain Gradients in Hills and Mountains of Bazhong City

CHEN Nan,YANG Wu-nian,LI Juan (State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection, Institute of RS & GIS,Chengdu University of Technology,Chengdu,Sichuan 610059,China)  
By taking 2007 TM images and 1∶250 000 contour maps of Bazhong City as data sources and using GIS spatial analysis functions,landuse database of Bazhong City is established and the DEM,slope,and terrain niche index chart are produced.Then,slope gradient,elevation gradient,and terrain gradient are respectively overlaid with landuse landscape data.The distribution characteristics of different landuse landscapes at different terrain gradients are discussed by introducing the dimensionless distribution index.Results showed that the forest land mainly distributes in the place with higher elevation,steeper slope,and greater terrain niche.Farmland and rural residential land are located in the place with low altitude,gentle slope,and low terrain niche due to the effects of climatic conditions and water distribution.Unused land is in the vast majority of the waters and the distribution index of unused land gradually approaches zero as terrain niche index,slope class,and elevation increase.Lawn,which has stronger selectivity for topographical conditions,mainly distributes in the place with the medium elevation,slope and terrain niche.By comparison,terrain niche index,a dual attribute combining elevation with slope,can more truly reflect the different spatial characteristics and distribution trends of the landuse landscapes.
【Fund】: 国家自然科学基金资助项目“岷江上游毛儿盖地区‘生态水’遥感量化研究”(41071265);; 2010年度高等学校博士学科点专项科研项目“生态水(层)信息指标参数遥感反演:以岷江上游毛儿盖地区为例”(20105122110006)
【CateGory Index】: F301
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