Estimating Total Gully Erosion in Loess Plateau Using Simplified Contour Maps

LIU Wan-qing; ZHANG Chao-chao; WANG Xu-hong

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Estimating Total Gully Erosion in Loess Plateau Using Simplified Contour Maps

- Estimating Total Gully Erosion in Loess Plateau Using Simplified Contour Maps
- Bulletin of Soiland Water Conservation Vol. 30, Issue 1, Pages: 128-131(2011)
- 作者机构：
  
  西北大学城市与环境学院,陕西,西安,710127
- 作者简介：
- 基金信息：
- DOI：
  CLC： X522X821
- Published：2011
- 稿件说明：
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LIU Wan-qing, ZHANG Chao-chao, WANG Xu-hong. Estimating Total Gully Erosion in Loess Plateau Using Simplified Contour Maps[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 128-131.
DOI：

LIU Wan-qing, ZHANG Chao-chao, WANG Xu-hong. Estimating Total Gully Erosion in Loess Plateau Using Simplified Contour Maps[J]. Bulletin of Soiland Water Conservation, 2011, 30(1): 128-131. DOI：

摘要

黄土高原是世界上土壤侵蚀最为严重的地区之一

沟谷侵蚀是其最重要的研究课题.为了从地理学角度估算沟谷侵蚀量

以5m×5m分辨率的DEM为实验数据

运用传统地图制图学领域的等高线图形简化技术

结合现代GIS三维分析与数据挖掘方法

对陕西省安塞县马家沟流域典型样区进行了实验研究.结果表明

对构成沟谷部位的等高线几何图形实施简化

即相当于在实验条件下对沟谷实行了"虚拟填充"

这种地形还原手法可用于模拟沟谷系统的形成和发展过程

对于探索单一沟谷或流域沟谷系统的长期演变过程

准确估算沟谷系统的侵蚀总量具有广泛的参考价值.

Abstract

One of the most severely eroded regions in the world is the Loess Plateau

where gully erosion is one of most important research topics.In order to estimate gully erosion from geographic perspective

Majiagou basin in Shaanxi Province as the study site was investigated using 5m×5m DEM as experimental data

combining three-dimensional analysis and data mining method in GIS

along with contour simplification techno-logy in traditional cartography.The results mainly show that terrain indicators changed by simplifing a group of contours that consist of a gully

which is equivalent to that gully was virtually filled in the laboratory.This method as virtual restoration of terrain can be used to simulate the formation and development process of a gully or a system of gullies in long terms.The concepts and methods developed in this paper may have some enlightening values to estimate total erosion of a gully or gully system precisely.

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