Volume 26 Issue 1
Feb.  2020
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FAN Xiaoyi, ZHANG Ruixiao, HU Xiaobo, 2020. Study on the influence of valley topographic parameter on the moving distance of landslide. Journal of Geomechanics, 26 (1): 106-114. DOI: 10.12090/j.issn.1006-6616.2020.26.01.011
Citation: FAN Xiaoyi, ZHANG Ruixiao, HU Xiaobo, 2020. Study on the influence of valley topographic parameter on the moving distance of landslide. Journal of Geomechanics, 26 (1): 106-114. DOI: 10.12090/j.issn.1006-6616.2020.26.01.011

Study on the influence of valley topographic parameter on the moving distance of landslide

doi: 10.12090/j.issn.1006-6616.2020.26.01.011
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  • Received: 2018-12-04
  • Revised: 2019-06-19
  • Published: 2020-02-28
  • The valley topography, located on the landslide motion path, can restrain, deflect, divert and prevent the landslide movement and result in the difference of landslide moving distance. The valley topography of landslide is divided into straight-valley and deflection-valley based on the angle between the moving direction of the landslide source area and the migration area and the extension direction of the valley accumulation area. The nonlinear regression models, related to landslide volumes and valley topographic parameters, were deduced. On the basis of the models, the laws that the volumes and the topography parameters influenced on the landslide moving distance were revealed. The results show that, the difference of the moving distance between the straight-valley and deflection-valley landslides increases gradually with the increase of volume. The reason of volume as a significant factor for landslide moving distance lies in the difference of landslide volume in order of magnitude. However, in the same order of magnitude, the volume change only is the greatest influence factor of the maximum horizontal moving distance of valley landslide, and the angle change of the slope is more significant than volume for the vertical moving distance and horizontal moving distance of the accumulative area. The deflection angle is a minor factor for deflection-valley landslide moving distance, because the valley slope significantly affects the effect of the deflection angle on the landslide moving distance. The results provide future reference for the disaster assessment of valley landslide.

     

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