Risk Zoning of Landslide Based on SINMAP Model in Yan'an City
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P642.22

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    Abstract:

    [Objective] Landslide hazard zoning research in Yan'an City of Shaanxi Province was carried out in order to provide a scientific basis for regional landslide prevention and reduction in Yan'an City and the Loess Plateau region.[Methods] Starting with the triggering factors of landslides in Yan'an City, and coupling with field survey, we established regional risk assessment model for shallow landslide using SINMAP model. We analyzed the risk areas of regional landslide, and quantitatively evaluated the migration and transformation of the landslide area under different rainfall conditions.[Results] With the increase of rainfall intensity from 5 mm/h to 200 mm/h, the proportions in the unstable region increased by 6.48% and 6.44% and the proportions in the stable region were always the highest, with an average of 46.79% and 51.33%. Meanwhile, potential unstable region may be transformed into unstable and very unstable region; area proportions varies between 5.04% and 17.31% and landslide proportions varies between 5.14% and 15.43%.[Conclusion] With an increase in rainfall, surface shallow soil moisture and humidity area increased, and extended to the ridge and gentler slopes unit. The transition from stable region to unstable region is taking place in the region.

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高波,王晓勇.基于SINMAP模型的延安市滑坡危险性区划[J].水土保持通报英文版,2019,39(3):211-216

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History
  • Received:November 29,2018
  • Revised:December 30,2018
  • Adopted:
  • Online: July 04,2019
  • Published: