基于DEM的马莲河流域数字地形分析  

Digital terrain analysis of Malian River Basin based on DEM

作　　者：郭超颖[1] 毕华兴[1] 陈涛[1] 杜林芳[1] 云雷[1] 任怡[1] 

机构地区：[1]北京林业大学水土保持学院,山西吉县森林生态系统国家野外科学观测研究站,北京100083

出　　处：《中国水土保持科学》2008年第1期101-106,共6页Science of Soil and Water Conservation

基　　金：人事部留学回国人员科技活动择优资助项目“黄土地嵌套小流域降雨径流过程中地形特征指数的尺度辨析与转换”;国家“973”项目“森林植被调控区域农业水土资源与环境的尺度辨析与转换”(2002CB111503)

摘　　要：研究基于DEM的数字地形分析可以为各个领域提供地形分析的基础理论及实现手段。DEM水平分辨率作为重要的尺度参数,是确定地形参数和应用尺度的重要指标。选取陇东黄土高原地区的马莲河流域作为研究对象,应用美国ESRI公司开发的ArcGIS地理信息系统软件,基于数字高程模型进行流域地形特征的提取与分析。研究提取流域的基本地形特征如坡度和坡向,提取流域水系,划分了小流域。通过分析比较,得出DEM水平分辨率对提取的地形特征及水文特征的影响,为马莲河流域的数字地形分析提供了理论依据。The terrain analytic＇ s basic theory for many fields and implement measure can be provided by digital terrain analysis based on DEM. As an important dimension parameter DEM grid resolution （horizontal resolution） plays a key role in determination of terrain parameters and application of scale. In this paper Gansu Loess Plateau region of the Malian River Basin was chosen as research object, utilizing the geography information system software which developed by American ESRI company, to have a drainage area＇ s distill and analytic based on digital elevation model. The basic terrain characters of drainage area such as slope, aspect, and channel system, the demarcation of the small watershed was investigated. The effect of DEM horizontal accuracy toward character of terrain and hydrological have been concluded based on analyzing and comparing.

关 键 词：数字高程模型(DEM) 数字地形分析 水平分辨率 流域特征 马莲河流域 

分 类 号：S427[农业科学—植物保护] P231.5[天文地球—摄影测量与遥感]