WANG Zhangqiong, YAN Echuan, WANG Lunan, ZHU Dapeng. 2014: CONTRIBUTION RATE OF SLOPE GRADIENT TO DEBRIS LANDSLIDE IN RESERVOIR REGION OF HUBEI AND CHONGQING REGIONS. JOURNAL OF ENGINEERING GEOLOGY, 22(6): 1204-1210. DOI: 10.13544/j.cnki.jeg.2014.06.026
    Citation: WANG Zhangqiong, YAN Echuan, WANG Lunan, ZHU Dapeng. 2014: CONTRIBUTION RATE OF SLOPE GRADIENT TO DEBRIS LANDSLIDE IN RESERVOIR REGION OF HUBEI AND CHONGQING REGIONS. JOURNAL OF ENGINEERING GEOLOGY, 22(6): 1204-1210. DOI: 10.13544/j.cnki.jeg.2014.06.026

    CONTRIBUTION RATE OF SLOPE GRADIENT TO DEBRIS LANDSLIDE IN RESERVOIR REGION OF HUBEI AND CHONGQING REGIONS

    • Debris landslide is one of the most common types of landslides in reservoir region. Slope gradient is an important internal cause of the development of landslides. The relation between slope gradient and probability of occurrence of debris landslide in reservoir region has important significance to debris landslide risk assessment in reservoir region. This paper takes 139 debris landslides in the Three Gorges Reservoir region and Danjiangkou Reservoir region as example. Firstly, it divides the slope gradient into 7 intervals. Each adjoining 5is an interval. Based on above, the influence that slope gradient contributes to landslide growth is quantitatively analyzed by contribution rate method. The results show that, the slope gradients of 15~25 have the maximum contribution rate. The slope gradients of 10~15and 25~30have the intermediate contribution rate. The slope gradients greater than 30and less than 10have the minimal contribution rate. The results can provide potential gist to risk evaluation for debris landslide in reservoir region.
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