Comparison of Hydro-geomorphology Representing Between DEMs by TINand ANUDEM Approaches

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Comparison of Hydro-geomorphology Representing Between DEMs by TINand ANUDEM Approaches

- Comparison of Hydro-geomorphology Representing Between DEMs by TINand ANUDEM Approaches
- Bulletin of Soiland Water Conservation Vol. 25, Issue 6, Pages: 84-88(2006)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
  2. 西北农林科技大学水土保持研究所, 陕西杨凌,712100
  3. 澳大利亚联邦科工组织水土资源研究所泊斯
  4. 澳大利亚联邦科工组织水土资源研究所堪培拉
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2006
- 稿件说明：
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YANG Qinke, Tim R. McVicar, Tom G. Van Niel, et al. Comparison of Hydro-geomorphology Representing Between DEMs by TINand ANUDEM Approaches[J]. Bulletin of Soiland Water Conservation, 2006, 25(6): 84-88.
DOI：

YANG Qinke, Tim R. McVicar, Tom G. Van Niel, et al. Comparison of Hydro-geomorphology Representing Between DEMs by TINand ANUDEM Approaches[J]. Bulletin of Soiland Water Conservation, 2006, 25(6): 84-88. DOI：

摘要

针对流域水文和土壤侵蚀定量模拟分析需要

对基于TIN和Hutchinson方法建立的DEM表现地形形态和起伏的能力进行了对比研究。结果表明

基于TIN建立的DEM始终存在一些平顶现象

一些较小的侵蚀沟被忽略

其上提取的河流不完全连续

多处出现多重线条河流

因而不能如实地反映地形起伏的细部特征。而基于ANUDEM建立的DEM

其派生等高线的形状与输入等高线吻合较好

较好地表现了地形的形态和起伏

对地形和坡度的反映更加连续和光滑

其上提取的河流信息基本与地形图上的河流一致。

Abstract

Mainly considering the demand of regional soil erosion and hydrological modeling

the DEMs generated from TIN and Hutchinson’s method (ANUDEM)

and their representation of the hydro2geomorphology charac-teristics have been compared. The results show that

in the TIN DEM

there are inevitably flat hilltops

some eroded gullies have been ignored during TIN const ructing

the stream networks based on the DEM is not continu-ous

and multiplelines rivers exist . In Hutchinson method based DEM

the DEM derived contours match to the o-riginal input contours

and the relief and slope can be represented smoothly and continuously. Therefore

the hy-dro-geomorphological features can be represented correctly even no rivers input to drive ANUDEM.

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