基于DEM的黄土地貌类型提取与制图——以黄土高原丘陵沟壑实验样区为例

以陕北绥德县刘家沟流域为实验样区 ,从地貌成因、形态和土地利用角度出发 ,分析了黄土高原丘陵沟壑区 3种典型地貌类型的区域特征 ;以不同地貌类型的区域特征为基础 ,在地理信息系统平台软件 Arc View的支持下 ,利用数字高程模型 (DEM)自动提取黄土丘陵区 3种基本地貌类型的方法和技术。研究分析结果证明 :利用 DEM自动提取地貌类型是一种快速、高效的技术方法 ,对指导退耕还林、防治水土流失和进行土地利用动态监测都具有重要意义。

DEM-Based Landforms Extraction and Application--A Case Study in the Hilly-gully Areas of the Loess Plateau

From the point of view of the landforms’cause of formation, landforms configuration and land use, regional characters of the three types of landforms in the hilly gully areas of the Loess Plateau are analyzed Approach and technology for automatic extraction of landforms are discussed using DEM as data resource,ArcView as instrument and regional characters of different landforms as basis taking Liujiagou River Basin in Suide County of northern Shaanxi Province as a case This research discovered that the approach and technology for automatic landforms extration using DEM is a high efficient method which is very important to guide biologic rescue of sloping plantation, govern water and soil conservation and test land use dynamically.