[1]LI Yimin,XIE Yaya,JIANG Deming,et al.Study on Sensitivity in Disaster-Pregnant Environmental Factors of Slope Geological Hazards in Nujiang Prefecture[J].Research of Soil and Water Conservation,2018,25(05):300-305.
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Study on Sensitivity in Disaster-Pregnant Environmental Factors of Slope Geological Hazards in Nujiang Prefecture
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 05
Page number:
300-305
Column:
Public date:
2018-09-06
- Title:
- Study on Sensitivity in Disaster-Pregnant Environmental Factors of Slope Geological Hazards in Nujiang Prefecture
- CLC:
- P694
- DOI:
- -
- Abstract:
- Due to the complex geological tectonic background, special geographical location and unique climate characteristics, frequent mountain hazards always exist in high mountain canyon area, and human settlements are vulnerable. In this paper, some factors were selected to research disaster-pregnant environment of slope geological hazards, including elevation, slope, river, road, lithology, fault zone, rainfall, and the land use type. Under the support of GIS, we used certainty factor (CF) model to analyze the slope geological hazards prone sensitivity and determined each factor’s impact degree according to the sensitivity-exponential (E) models, ascertained the beneficial conditions to occurrence of slope geological hazards and made the zoning map of slope geological hazards sensitivity in region. The results showed that the area ratio of extremely low sensitive zone, low sensitive zone, medium sensitive zone, high sensitive zone, extremely high sensitive zone in the study area was 19.95:31.22:23.84:16.57:8.2. A total of 1 366 slope geological hazards points were used to verify the research results, the high and extremely high sensitive zones were cover 24.99% of the study area, but the actual number of slope geological hazards was 1 171, and the number of slope geological hazards in those sensitive zones was 85.72% of the total. The spatial distribution of slope geological disaster sites has a positive correlation with the sensitive zone. And the latest geological disasters data of 2017 were used to verify the research result. The number of geological disasters in high and extremely high sensitive areas accounted for 90% of the total number. All disasters have verified the rationality of the results and the results can provide a basis decision-making for disaster prevention and mitigation of disasters in Nujiang Prefecture.
- References:
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