[1]YANG Zhikun,LIANG Shouyun,CHEN Zhuo,et al.Assessment of Hazard of Landslide in the Baxie River Basin Based on Factor Correlativity-Cluster Analysis[J].Research of Soil and Water Conservation,2018,25(03):305-309.
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Assessment of Hazard of Landslide in the Baxie River Basin Based on Factor Correlativity-Cluster Analysis
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 03
Page number:
305-309
Column:
Public date:
2018-04-10
- Title:
- Assessment of Hazard of Landslide in the Baxie River Basin Based on Factor Correlativity-Cluster Analysis
- CLC:
- P642.22
- DOI:
- -
- Abstract:
- Baxie River Basin is the area where the landslides frequently occur in the eastern part of Gansu Province. Based on the field investigation and remote sensing interpretation, the influential factors on landslides were analyzed. The results indicate that the distribution of landslides is closely related to the landform and physiognomy, presenting a high concentration in the ranges of elevation of 2 000~2 200 m, slope gradients of 15°~40°, relief amplitude of 100~200 m, sunny slope, cutting depth of 50~100 m and gully density of 1~2.5 km/km2. In addition, the distribution of landslides is well correlated with the lithology, vegetation cover and human activities, especially with the lithology of Malan loess and mudstone, Normalized Difference Vegetation Index of 0.2~0.3 and scopes of 0~600 m distance from the roads. According to the correlation between each factor and landslide, the cluster analysis is carried out to divide the study area into four dangerous areas:high danger zone (accounting for 30.9% of whole area), moderate danger zone (accounting for 21.7% of whole area), low danger zone (accounting for 30.3% of whole area), and extremely low danger zone (accounting for 17.1% of whole area), respectively.
- References:
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1900-01-01