Comparative Study of Monitoring Gully Erosion Morphology Change Process by Using High Precision GPS,Leica HDS 3000 Laser Scanner and Needle Board Method

ZHANG Peng; ZHENG Fen-li; WANG Bin; CHEN Ji-qiang; DING Xiao-bin

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Comparative Study of Monitoring Gully Erosion Morphology Change Process by Using High Precision GPS,Leica HDS 3000 Laser Scanner and Needle Board Method

- Comparative Study of Monitoring Gully Erosion Morphology Change Process by Using High Precision GPS,Leica HDS 3000 Laser Scanner and Needle Board Method
- Bulletin of Soiland Water Conservation Vol. 27, Issue 5, Pages: 11-15(2008)
- 作者机构：
  
  1. 西北农林科技大学资源环境学院 , 陕西杨凌,712100
  2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室 , 陕西杨凌,712100
- 作者简介：
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- Published：2008
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ZHANG Peng, ZHENG Fen-li, WANG Bin, et al. Comparative Study of Monitoring Gully Erosion Morphology Change Process by Using High Precision GPS,Leica HDS 3000 Laser Scanner and Needle Board Method[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 11-15.
DOI：

ZHANG Peng, ZHENG Fen-li, WANG Bin, et al. Comparative Study of Monitoring Gully Erosion Morphology Change Process by Using High Precision GPS,Leica HDS 3000 Laser Scanner and Needle Board Method[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 11-15. DOI：

摘要

采用连续模拟降雨试验

对坡沟系统概化模型进行坡面沟蚀发育过程模拟

再现坡面片蚀—细沟侵蚀—切沟侵蚀演变过程。结合3种测量技术从测量精度、测量人员要求、数据处理、数据通用性、配套软件使用、前期投入、测量条件等几个方面入手

对比分析高精度GPS(Trimble 5700)、三维激光扫描仪(Leica HDS 3000)和测针板的3种测量方法的优缺点

同时对3种测量方法在沟蚀过程监测和侵蚀量估算方面进行对比研究。结果表明

激光扫描仪能很好地监测沟蚀演变过程

且对侵蚀量估算精度较高

误差仅为4.5%。高精度GPS也能很好地监测沟蚀演变过程

对侵蚀量估算精度误差为7.38%。测针板法不能很好的反映沟蚀演变过程

但是对于侵蚀量的估算可以满足日常要求

误差为-12.78%。

Abstract

Debris flow is a natural disaster in mountainous areas

so estimation of its criticality is substantial in regional disaster prevention and reduction.Based on system theory and the analysis of the basic situation of debris flow disaster in Miyun County

this study uses analytic hierarchy process to quantify 10 factors which affect debris flow risk degree and construct a model for debris flow risk degree assessment.In the model

the percentage of inner factors is 41.4% and the percentage of external factors

58.6%.The model is applied to assess the risk degree of local debris gullies.Result obtained has a high relativity to the real situation.The study indicates that this kind of assessment is feasible and veracious for the assessment of the debris flow risk degree.The future tasks should be the reliability research on study methods and thus provide the accurate evaluation result for users.

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