【摘要】 针对区域尺度的径流、水土流失定量评价和植被适宜性评价等研究工作需要,利用1∶25万数字地形图和ANUDEM软件,对黄土丘陵区中等分辨率水文地貌关系正确DEM建立方法进行了研究。结果表明该方法所建立的DEM,可以正确反映地貌梁、沟结构及其与流水线网络的关系,对地形描述的能力优于TIN方法建立的DEM;利用ANUDEM和1∶25万地形图插值建立黄土丘陵区DEM的三个主要参数分别为分辨率50或100,计算迭代次数40,第二糙率系数0.8。更多还原

【Abstract】 To meet the demand of regional soil erosion and hydrological modeling,ANUDEM has been applied to generate DEM with the 1:250,000 digital topographic map source data in Loess Plateau,and parameters have been optimized with varied tests.A hydrologically correct DEM has been generated and it can provide support to interpolate meteorology data in Loess hills area.As a result the shape of complex loess landscape is represented better than that with TIN derived DEM.The key parameters to run ANUDEM to construct DEM with 1:250,000 topographic map have been optimized,which including resolution,iteration number and 2^nd roughness,should be 50-100,40 and 0.8 respectively.更多还原