Volume 43 Issue 11
Nov.  2018
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ZHANG Hongming, WANG Meng, YANG Qinke, JIN Bei, WANG Meili, LI Rui. Effect of Slope Cutoff in Extraction of Distributed Soil Erosion Slope Length[J]. Geomatics and Information Science of Wuhan University, 2018, 43(11): 1753-1760. DOI: 10.13203/j.whugis20160491
Citation: ZHANG Hongming, WANG Meng, YANG Qinke, JIN Bei, WANG Meili, LI Rui. Effect of Slope Cutoff in Extraction of Distributed Soil Erosion Slope Length[J]. Geomatics and Information Science of Wuhan University, 2018, 43(11): 1753-1760. DOI: 10.13203/j.whugis20160491
shu

Effect of Slope Cutoff in Extraction of Distributed Soil Erosion Slope Length

  • 1.

    Northwest A & F University, Yangling 712100, China

  • 2.

    Department of Urbanology and Resource Science, Northwest University, Xi'an 710069, China

  • 3.

    Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, China

Funds: 

The National Natural Science Foundation of China 41771315

The National Natural Science Foundation of China 41301283

The National Natural Science Foundation of China 41371274

The National Natural Science Foundation of China 41301507

the National Key Research and Development Program of China 2017YFC0403203

EU Horizon 2020 Research and Innovation Programme 635750

Funded by State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau A314021402-1702

the Natural Science Foundation of Shanxi Province 2015JM4142

the Natural Science Foundation of Shanxi Province 2016JM6038

the Fundamental Research Funds for the Central Universities 2452015060

More Information
  • Author Bio:

    ZHANG Hongming, PhD, professor, specializes in spatial data management, regional soil erosion evaluation and digital terrain analysis.E-mail:zhm@nwsuaf.edu.cn

  • Corresponding author:

    YANG Qinke, PhD, professor.E-mail:qkyang@nwu.edu.cn

  • Received Date: August 24, 2017
  • Published Date: November 04, 2018
    Graphical Abstract
    • Abstract
  • Topography is an important factor affecting soil erosion.Distributed soil erosion slope length is an important parameter of topographic factor.The slope length agree with the process of soil erosion, is calculated with the cutoff considered.Slope length, influenced by the terrain, especially the slope changes affects the extraction results are in urgent need of research.In this paper, the mathematical surface and the digital elevation model of the Xiannangou catchment in the Loess Plateau are used as the data source.The length of the slope is extracted by using the LS_TOOL method, and the slope length cutoff results caused by the change in slope are compared and analyzed by principal component analysis.The results show that the greater the down slop decrease, the more obvious the slope cutoff effect.The cutoff factor R1 and cutoff factor R2 have positively correlated with the maximum slope length and averages slope length; as there are more steep slopes and channels in the Loess Plateau region, the influence of R1 is less than that of R2.When the slope setting of the slope is larger than that of R1> 0.7 and R2> 0.5, the change of slope length is obvious.It is suggested that the slope cutoff setting of the slope length of the Loess Plateau region should be R1=0.7 and R2=0.5.
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    • References (22)
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