摘要
高精度数字高程模型(DEM)是水土流失规律研究与流域地形空间分析中重要的空间数据。以黄土高原沟壑区的南小河沟流域为例,以1∶1万地形图为数据源,探讨了在Arcgis和ArcView地理信息平台下,生成高精度DEM及提取流域土壤侵蚀指标的步骤和方法。结果表明,提取的地形信息能准确地反映该区域地形起伏变化与破碎状况,满足当前"数字流域"建设的需要。
High accuracy DEMs is an important data in study of soil erosion and terrain feature space analysis. Taking Nanxiaohegou watershed in Gansu Province, which is in the gully region of Loess Plateau as an example, and 1∶10 000 relief map as an data source, the method of high accuracy DEMs and extract soil erosion index of watershed are discussed. The result shows that the terrain feature information is better and truly based on high accuracy DEMs, it is contented in the build of digital watershed at present.
出处
《水土保持通报》
CSCD
北大核心
2004年第3期34-36,共3页
Bulletin of Soil and Water Conservation
基金
黄河水利委员会"十五"重大科研项目"黄土高原沟壑区水土流失规律及水保效益分析研究
关键词
高精度DEM
南小河沟流域
黄土高原沟壑区
high accuracy DEMs
Nanxiaohegou watershed
the gully region of Loess Plateau
