强降水诱发陇南电网地质灾害风险评估及预警方法研究
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孙涛, 李玥, 王津, 李晓琴, 何金梅, 赵文婧, 吕玫霞
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Research on risk assessment and early warning method for geological hazards induced by heavy precipitation in Longnan power grid
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SUN Tao, LI Yue, WANG Jin, LI Xiaoqin, HE Jinmei, ZHAO Wenjing, LYU Meixia
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表2 地质灾害暴露度评价因子分级及信息量值
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Tab.2 Geological hazard exposure degree valuation factor classification and information quantity values
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| 评价因子 | 分级 | （Ni/N）/% | 信息量值 | | 高程/m | ≤2 000 | 8.22 | 1.52 | | >2 000~2 500 | 23.33 | 0.36 | | >2 500~3 000 | 37.01 | 0.24 | | >3 000~3 500 | 23.57 | -0.15 | | >3 500~4 000 | 6.57 | -0.79 | | >4 000 | 1.30 | -1.79 | | 曲率 | <0 | 9.58 | 0.70 | | 0 | 39.71 | -0.23 | | >0 | 50.71 | -0.67 | | 坡度/（°） | ≤15 | 8.23 | -0.02 | | >15~25 | 66.38 | -0.15 | | >25~35 | 41.21 | -0.15 | | >35~45 | 26.01 | 0.42 | | >45 | 9.89 | 0.79 | | 坡向 | 北 | 20.24 | -0.13 | | 东北 | 12.26 | 0.01 | | 东 | 8.76 | -0.25 | | 东南 | 10.16 | -0.14 | | 南 | 17.30 | 0.44 | | 西南 | 10.66 | -0.03 | | 西 | 9.01 | -0.15 | | 西北 | 11.59 | 0.09 | | NDVI | ≤0.25 | 12.45 | 10.45 | | >0.25~0.50 | 59.55 | 2.90 | | >0.50~0.75 | 19.25 | -1.00 | | >0.75~1.00 | 8.75 | -0.50 |
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