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《Journal of Xi'an University of Technology》 2009-01
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Research on Topographic Characters of Land Use Spatial Distribution of Watershed Based on GIS

SHEN Zhong-yuan1,LI Zhan-bin1,2,ZHU Bing-bing1,ZHANG Xiao-xia1(1.Key Lab of Northwest Water Resources and Environment Ecology of MOE,Xi'an University of Technology,Xi'an 710048,China;2.State Key Laboratory of Soil Erosion and Dry Land Farming on Loess Plateau,Yangling 712100,China)  
With GIS as the platform and in combination with RS data imagine and topographic factor overlay analysis,this paper studies topographic characters of land use in the Dali river watershed.The research findings indicate that the spatial distribution of elevation features in the different land types in the watershed appears to be the peak value phenomena.As to the slope degrees,the cultivated land,woodland and grassland mainly distribute over the slope of 25°or so.The woodland and grassland subject to the effect of superior slope direction and the difference between the north and south slopes concentrated spread over the northeast,southeast and other slopes facing the south.The distribution of land use area of different types appears to have the trend of becoming large first and then reducing to small with an increase in rolling degrees.Therefore,20~40 m can be the critical zone of rolling degrees.The conclusion can provide the scientific base and theoretical support for further study of the readjustment of land use structures and the implementation of water and soil conservation planning in the Dali river watershed.
【Fund】: “十一五”国家科技支撑计划资助项目(2006BAD09B02);; 国家重点基础研究发展计划资助项目(2007CB407206);; 西安理工大学优秀博士学位论文基金资助项目(207-210010)
【CateGory Index】: S157
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