基于GIS的贫困地区降雨诱发型地质灾害风险评估----以湖北省恩施州为例
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陈曦炜, 裴志远, 王飞
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GIS-based Assessment of Rainstorm-induced Geological Hazards Risk in Enshi Autonomous Prefecture
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CHEN Xiwei, ,PEI Zhiyuan,WANG Fei
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| 表2 恩施州地质灾害孕灾环境因子信息量值 |
| Tab. 2 Information values of the geological hazard environment sensitivity factors |
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| 评价因子 | 含义 | 分类 | 信息量 | 评价因子 | 含义 | 分类 | 信息量 | | X1 | 坡度/° | <2.5 | -0.2458 | X7 | 地层岩性 | 4304041 | 1.8851 | | 2.5~5 | -0.0991 | 4200881 | 1.8851 | | 5~7.5 | 0.2607 | 4200690 | 5.1432 | | 7.5~10 | 0.2819 | 4280501 | 2.2906 | | 10~12.5 | 0.3474 | 4306312 | 0.2757 | | 12.5~15 | 0.2227 | 4208003 | 3.4491 | | 15~17.5 | 0.6190 | 5130291 | 0.0000 | | 17.5~20 | 0.7476 | 4200720 | 2.0522 | | 20~22.5 | 1.2500 | 4208002 | 1.2790 | | 22.5~25 | 0.5738 | 4203561 | 1.1230 | | >25 | 0.0000 | 5122212 | 0.9406 | | X2 | 坡向 | 平 | -0.3108 | 5121251 | 0.0000 | | 北 | 0.2543 | 4201514 | 2.1364 | | 东北 | 0.0994 | 5209270 | 0.0000 | | 东 | -0.2543 | 4302060 | -0.5998 | | 东南 | -0.0486 | 4204532 | 0.0000 | | 南 | -0.0661 | 5130281 | -0.3121 | | 西南 | 0.1385 | 4200511 | 0.0000 | | 西 | -0.0147 | 4203512 | 0.5306 | | 西北 | 0.0243 | 4204540 | 0.3653 | | X3 | 高程/m | <250 | 3.2479 | 4305041 | -1.5806 | | 250~500 | 1.2393 | 4208001 | 0.0000 | | 500~750 | 0.3357 | 4201551 | 0.6042 | | 750~1000 | -0.0514 | 5141041 | -0.7052 | | 1000~1250 | -0.4390 | 5122241 | 0.3447 | | 1250~1500 | -0.7657 | 5123011 | 0.1359 | | 1500~1750 | -1.6645 | 5132145 | -0.5572 | | 1750~2000 | 0.0000 | 4200090 | 0.0000 | | >2000 | -1.2463 | 4203518 | -1.7912 | | X4 | 距河流的距离/m | <1000 | 0.3900 | 4302071 | 0.5999 | | 1000~2000 | -0.1358 | 5121202 | -1.6413 | | 2000~3000 | -0.5328 | 4304022 | 0.5085 | | 3000~4000 | -0.5968 | 5122211 | -0.0797 | | 4000~5000 | -0.7495 | 4204520 | -2.2009 | | 5000~6000 | -0.7659 | 4303072 | -0.4916 | | 6000~7000 | -2.6271 | 5123021 | -0.3556 | | >7000 | 0.0000 | 4204060 | 0.0727 | | X5 | 距断裂带距离/m | <1000 | 0.2190 | 5123023 | 0.1120 | | 1000~2000 | 0.1028 | 5208042 | -1.1231 | | 2000~3000 | 0.0405 | 4204510 | -0.5485 | | 3000~4000 | 0.0149 | 4204531 | -0.9771 | | 4000~5000 | 0.1613 | 5123051 | 0.0484 | | 5000~6000 | 0.1859 | 4202514 | -0.1073 | | 6000~7000 | -0.2584 | 4303090 | -0.4422 | | 7000~8000 | -0.4105 | 4205080 | 0.3985 | | 8000~9000 | -0.4356 | 4200661 | -3.0916 | | 9000~10 000 | -0.8862 | 4202516 | 0.0011 | | 10 000~11 000 | -0.5200 | 4201561 | -0.3853 | | 11 000~12 000 | -0.2818 | 5203081 | -0.4710 | | 12 000~13 000 | -0.4001 | 4303011 | -0.7968 | | 13 000~14 000 | -1.0503 | 4202515 | 0.5270 | | 14 000~15 000 | -0.6460 | 5141080 | 0.1846 | | 15 000~16 000 | 0.1702 | 4200701 | -0.3811 | | 16 000~17 000 | 0.1979 | 4201512 | -0.2934 | | 17 000~18 000 | -0.4785 | 4203519 | -0.9565 | | 18 000~19 000 | -0.6853 | 4201600 | 0.0648 | | 19 000~20 000 | -0.9825 | 4201590 | -0.1255 | | 20 000~21 000 | 1.1865 | 4201580 | -0.2737 | | >21 000 | 0.9634 | 5209130 | 1.2782 | | X6 | 距主干道的距离/m | <1000 | 0.2858 | 5133041 | -0.9244 | | 1000~2000 | -0.4032 | 4203513 | 0.0975 | | 2000~3000 | -0.8868 | 5209100 | -0.1410 | | >3000 | 0.0000 | 5133040 | -0.5386 |
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