| 张彩霞,杨勤科,段建军.高分辨率数字高程模型的构建方法[J].水利学报,2006,37(8):1009-1014 |
| 高分辨率数字高程模型的构建方法 |
| Method for establishing high resolution digital elevation model |
| 投稿时间：2005-11-19 |
| DOI： |
| 中文关键词: 数字高程模型 ANUDEM 参数率定 质量评价 丘陵沟壑区 |
| 英文关键词: digital elevation model (DEM) ANUDEM calibration of parameters quality assessment loess plateau gully district |
| 基金项目:中国科学院知识创新重要方向项目(KZCX3-SW-421);中澳合作项目(LWRI/2002/018) |
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| 中文摘要: |
| 高分辨率数字高程模型(DEM)是正确计算坡度坡向、提取流域地形特征、进行水文分析的前提。本文以黄土高原典型丘陵沟壑区小流域为例，基于大比例尺(1∶10?000)数字化地形图和专业化DEM插值软件ANUDEM，探讨了ANUDEM在应用中的几个重要参数的取值，建立了高分辨率DEM，并对拟合DEM的质量进行了评价。研究表明，最佳分辨率为等高线间距的一半，一般为5m或2.5m，第二糙度系数为0.8，计算迭代次数为20～30次。ANUDEM建立的DEM表面光滑，回放等高线与原等高线符合度高，能真实地表现地形起伏，由其提取的水系与流域沟谷完全吻合且连续完整，适宜水文分析，是一种建立高质量DEM的优良方法。 |
| 英文摘要: |
| The interpolation software ANUDEM is applied to establish the high resolution digital model for a typical small gully river basin in loess plateau based on the map with scale 1∶10000. The determination of major parameters in application of the ANUDEM is investigated. The quality of the established DEM is also assessed. It is found that the optimal resolution of the DEM is one half of the vertical interval of contour lines, generally it should be 2.5m or 5m, the second roughness penalty is 0.8, and the number of iterations is 20-30 times. The river systems and contours extracted from the DEM by using this method are well accord with general configuration of the land surface and suitable for hydrological analysis. |
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