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《Journal of Nanjing Normal University(Natural Science Edition)》 2009-02
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Slope Spectrum of Positive and Negative Terrains of Loess Plateau in Northern Shaanxi Province

Gao Yiping,Tang Guoan,Zhou Yi,Li Fayuan(Key Laboratory of Virtual Geographic Environment,Nanjing Normal University,Ministry of Education,Nanjing,210046,China)  
Divided by the zigzag loess shoulder-lines,the loess plateau presents two main kinds of terrains,which are named positive and negative terrains.The slope characteristic differences of positive and negative terrains show specific spatial variation patterns.Taking 5 m grid resolution DEMs as main information source and the extracted positive and negative terrains as basic data,researches are done to reveal the slope spectrum characteristics of positive and negative terrains in different landform type areas.The results show that there exist significant differences between the loess positive and negative terrains of the different landform type areas in the aspect of the slope spectrum curves,skewness,average slope difference and slope spectrum entropy.Moreover,the spatial variation of the significant differences present a specific regularity,which reflect the crushing and development of the land surface to some extent.
【Fund】: 国家自然科学基金(40671148 40801148);; 教育部高等学校博士学科点专项科研基金(20050319006)资助项目
【CateGory Index】: P941.74
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