坡度与水平分辨率关系的初步研究  

Relationships between DEM-derived Slope and Horizontal Resolution

作　　者：刘红艳[1] 杨勤科[2,3] 牛亮[2] 王春梅[3] 李俊[1] 

机构地区：[1]西北农林科技大学资源环境学院,陕西杨陵712100 [2]西北大学城市与环境学院,西安710069 [3]中国科学院水利部水土保持研究所,陕西杨陵712100

出　　处：《水土保持研究》2010年第4期34-37,共4页Research of Soil and Water Conservation

基　　金：国家重点基础研究发展计划(973)项目(2007CB407203);国家自然科学基金项目(40971173)

摘　　要：结合数字地形分析和常规统计方法,研究了县南沟流域DEM水平分辨率与坡度值的关系。研究表明:随着水平分辨率的降低,流域平均坡度值下降;地形特征点坡度呈现出随机性;沟沿线坡度随分辨率降低呈衰减趋势,分水线和流水线坡度相对缓慢降低。负地形坡度衰减速度大于正地形。Taking Xiannangou watershed as the test area,this paper studied the relationships between DEMderived slope and horizontal resolution by using terrain analysis and statistical method.The main conclusions are as follows：with DEM resolution decreasing,mean slope decreases;slope at single point shows uncertainty;slope at edgeline decreases sharply,slope at borderline and streamline decreases slowly.Slope at negative terrain decreases more sharply than positive terrain.

关 键 词：数字高程模型 地形分析 分辨率 地形特征点 

分 类 号：S157.1[农业科学—土壤学] TP79[农业科学—农业基础科学]