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基于加权信息量模型的云南澜沧县滑坡危险性评价

吴兴贵 王宇栋 王蓝婷 丁梓逸

吴兴贵,王宇栋,王蓝婷,等. 基于加权信息量模型的云南澜沧县滑坡危险性评价[J]. 中国地质灾害与防治学报,2023,34(0): 1-10 doi: 10.16031/j.cnki.issn.1003-8035.202210013
引用本文: 吴兴贵,王宇栋,王蓝婷,等. 基于加权信息量模型的云南澜沧县滑坡危险性评价[J]. 中国地质灾害与防治学报,2023,34(0): 1-10 doi: 10.16031/j.cnki.issn.1003-8035.202210013
WU Xinggui,WANG Yudong,WANG Lanting,et al. Hazard assessment of landslides in Lancang County, Yunnan Province based on weighted information value model[J]. The Chinese Journal of Geological Hazard and Control,2023,34(0): 1-10 doi: 10.16031/j.cnki.issn.1003-8035.202210013
Citation: WU Xinggui,WANG Yudong,WANG Lanting,et al. Hazard assessment of landslides in Lancang County, Yunnan Province based on weighted information value model[J]. The Chinese Journal of Geological Hazard and Control,2023,34(0): 1-10 doi: 10.16031/j.cnki.issn.1003-8035.202210013

基于加权信息量模型的云南澜沧县滑坡危险性评价

doi: 10.16031/j.cnki.issn.1003-8035.202210013
详细信息
    作者简介:

    吴兴贵(1997-),女,重庆南川人,硕士,安全工程专业。E-mail:2839666766@qq.com

    通讯作者:

    王宇栋(1973-),男,云南昆明人,博士,副教授,主要研究地灾规划,大数据挖掘与安全可视化。E-mail:584772219@qq.com

Hazard assessment of landslides in Lancang County, Yunnan Province based on weighted information value model

  • 摘要: 云南澜沧县位于滇西经向构造带中,在构造运动强烈,人类活动日益增加背景下,滑坡灾害发育,人民生命财产受到严重威胁,因此,对该区域进行滑坡危险性评价研究具有重要意义。以澜沧县滑坡数据为基础,选取高程、坡度、坡向、地层岩性、距断层距离,植被覆盖度,距道路距离,降雨量共8个评价因子,构建滑坡危险性评价指标体系。基于熵权法与信息量耦合模型,利用ArcGIS地理空间分析对研究区滑坡危险进行定性、定量评价并分区。结果显示:高危险区,面积占比17.91%,较高危险区占37.91%,中危险区占25.94%,低危险区占18.25%。经检验评价结果合理,加权信息量模型适用于滑坡危险性评价。
  • 图  1  研究区位置与滑坡灾害点分布

    Figure  1.  Location of the study area and distribution of landslide hazard sites

    图  2  滑坡危险评价因子分级图

    Figure  2.  Classification diagram of landslide risk evaluation factors

    图  3  指标分级与滑坡相对点密度柱状图

    Figure  3.  Histogram of indicator classification and relative point density of landslide

    图  4  滑坡危险性分区图

    Figure  4.  Landslide hazard zoning map

    图  5  危险性评价结果的ROC曲线

    Figure  5.  FIG. 5 ROC curve of hazard assessment results

    表  1  数据来源

    Table  1.   Summary of Data source

    数据名称数据来源数据名称数据来源
    滑坡灾害点澜沧县地质灾害详查DEM数据地理空间数据云
    地质图全国地质资料馆降雨量中国气象数据网
    道路数据91卫图助手植被覆盖数据地理空间数据云
    下载: 导出CSV

    表  2  指标统计计算结果

    Table  2.   Statistical calculation results of indicators

    因子因子二级属性滑坡点个数栅格数量信息量Ii相对点密度Di归一化XiHiWi
    高程/m492~1 099201 224 511−0.0760.9270.1960.9210.174
    1 099~1 366332 536 591−0.3030.7380.156
    1 366~1 623542 684 0740.1331.1420.241
    1 623~1 910581 991 0790.5031.6530.350
    1 910~2 53061 268 180−1.3150.2690.057
    坡度/(°)0~10241 453 076−0.0650.9370.1710.9840.034
    10~20753 730 5520.1321.1410.208
    20~30473 223 642−0.1890.8270.151
    30~40201 114 8200.0181.0180.186
    >405182 3450.4421.5560.284
    坡向181 267 813−0.2160.8060.1020.9670.072
    东北381 404 8530.4291.5350.195
    91 199 159−0.8530.4260.054
    东南141 116 898−0.3410.7110.090
    291 195 8080.3191.3760.175
    西南251 283 1200.1011.1060.140
    西141 112 242−0.3360.7140.091
    西北241 124 5420.1921.2110.154
    地层岩性松散岩(土)体391 1360.6251.8680.3060.9110.197
    软弱岩层7197 9430.6972.0070.329
    较软弱岩层302 174 744−0.2450.7830.128
    较坚硬岩层1286 776 3270.0701.0720.176
    坚硬岩层3464 285−1.0030.3670.060
    距断裂距离/m0~1 000441 912 2600.2671.3060.2820.9710.065
    1 000~2 000291574 1530.0441.0460.226
    2 000~3 000161 187 454−0.2680.7650.165
    3 000~4 0008917 368−0.7030.4950.107
    >4 000744 113 2000.0211.0210.220
    植被覆盖度0~0.1933900 9950.7322.0790.3290.8970.228
    0.19~0.45451 291 0110.6821.9780.313
    0.45~0.66381 846 6660.1551.1680.185
    0.66~0.84412 895 125−0.2190.8040.127
    0.84~0.1142 770 638−1.2490.2870.045
    距道路距离/m0~50019480 3540.8092.2450.3580.9500.111
    500~1 00011458 2800.3091.3620.217
    1 000~1 5007433 124−0.0860.9170.146
    1 500~2 0006413 798−0.1950.8230.131
    >2 0001287 918 879−0.0860.9170.146
    降雨量/mm1 212.3~1 313.2411 166 2330.6911.9950.3560.9470.119
    1 313.2~1 382.0351 524 1280.2651.3030.233
    1 382.0~1 435.2271 962 908−0.2480.7810.139
    1 435.2~1 485.8382 637 049−0.2010.8180.146
    1 485.8~1 545.5302 414 117−0.3490.7050.126
    下载: 导出CSV

    表  3  分区统计结果

    Table  3.   Statistical results of zoning

    危险性等级面积/km2面积
    比例/%
    滑坡点
    /个
    滑坡点
    比例/%
    滑坡相对
    点密度
    高危险区1549.7217.918449.122.74
    较高危险区3280.7737.916336.840.97
    中危险区2244.9325.941911.110.43
    低危险区1579.7618.2552.920.16
    下载: 导出CSV
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  • 收稿日期:  2022-10-11
  • 录用日期:  2023-05-04
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