西南山地滑坡灾害生态风险评价——以大理白族自治州为例
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杜悦悦, 彭建, 赵士权, 胡智超, 王仰麟
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Ecological risk assessment of landslide disasters in mountainous areas of Southwest China: A case study in Dali Bai Autonomous Prefecture
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Yueyue DU, Jian PENG, Shiquan ZHAO, Zhichao HU, Yanglin WANG
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表1 大理州滑坡灾害危险性评价因子信息量 |
Tab. 1 Results of information values for hazard assessment of landslide disasters in Dali Prefecture |
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评价因子 | 评价因子类别 | 信息量值 | 评价因子 | 评价因子类别 | 信息量值 | 高程(m) (w=0.1534) | < 1800 | 0.456 | 多年平均 降雨(mm) (w=0.0887) | < 900 | -0.372 | 1800~2200 | 0.372 | 900~950 | -0.274 | 2200~2500 | -0.128 | 950~1000 | -0.355 | 2500~3000 | -1.613 | 1000~1050 | -0.192 | > 3000 | -2.746 | 1050~1100 | 0.397 | 坡度(°) (w=0.1534) | < 8 | -0.454 | 1100~1150 | 1.018 | 8~15 | 0.188 | > 1150 | | 0.563 | 15~25 | 0.209 | 距离断裂带 距离(m) (w=0.1078) | < 1000 | 0.294 | 25~35 | -0.168 | 1000~5000 | -0.139 | > 35 | -0.739 | 5000~10000 | 0.104 | NDVI (w=0.0717) | < 0.31 | 0.290 | 10000~20000 | -0.080 | 0.31~0.47 | 0.032 | > 20000 | | -0.310 | 0.47~0.60 | 0.155 | 距离河流 距离(m) (w=0.0597) | < 500 | 0.598 | 0.60~0.73 | 0.033 | 500~1500 | 0.260 | > 0.73 | -0.324 | 1500~3000 | -0.404 | 岩性 (w=0.2435) | 0 | -0.793 | 3000~5000 | -0.692 | 1 | -0.087 | > 5000 | | -0.813 | 2 | -0.006 | 距离公路 距离(m) (w=0.0170) | < 500 | 0.636 | 3 | -0.037 | 500~1500 | 0.237 | 4 | 0.255 | 1500~3000 | -0.240 | 5 | -0.593 | 3000~5000 | -0.378 | 地震点 核密度 (w=0.0539) | < 0.002 | -0.314 | > 5000 | -0.611 | 0.002~0.004 | -0.055 | 距离城镇 距离(m) (w=0.0509) | < 100 | 1.450 | 0.004~0.006 | 0.103 | 100~300 | 0.621 | 0.006~0.008 | 0.271 | 300~500 | -0.330 | > 0.008 | 0.396 | 500~1000 | -1.647 | | > 1000 | -2.555 | |
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