Kriging interpolation method is a optimal method for establishing DEMs in catchment and region scale, and 1 m is a optimal DEM resolution in upper Yangtze River basin;

• Kriging插值法是长江上游地区小流域和冲沟系统DEM建立的最佳方法,1m的空间分辨率是长江上游地区描述地形的理想分辨率,可以满足切沟和冲沟的研究需要。