Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, Shaanxi Province, PRC;Department of Urban and Resource Sciences, Northwest University, Xian 710069, PRC 在期刊界中查找 在百度中查找 在本站中查找
Taking Jiuyuan valley in the loess hill and gully area as a test site,the accuracy of terrain variables derived from 1∶50000 scaled DEMs by means of a careful comparison with high accuracy DEMsof 1∶10000 scaled is probed into. The experiment shows a big error between the terrain variables(i. e. slope gradient,surface curvature,channel networks etc. derived from the both information sources. At present,1∶50 000 scaled DEM has been set up in the whole country,which will be applied as an important base for soil erosion investigation as well as soil and water conservation project planning in the loess plateau region.