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基于GIS技术和频率比模型的三峡地区秭归向斜盆地滑坡敏感性评价

齐信 黄波林 刘广宁 王世昌

齐信, 黄波林, 刘广宁, 等, 2017. 基于GIS技术和频率比模型的三峡地区秭归向斜盆地滑坡敏感性评价. 地质力学学报, 23 (1): 97-104.
引用本文: 齐信, 黄波林, 刘广宁, 等, 2017. 基于GIS技术和频率比模型的三峡地区秭归向斜盆地滑坡敏感性评价. 地质力学学报, 23 (1): 97-104.
QI Xin, HUANG Bo-lin, LIU Guang-ning, et al., 2017. LANDSLIDE SUSCEPTIBILITY ASSESSMENT IN THE THREE GORGES AREA, CHINA, ZIGUI SYNCLINAL BASIN, USING GIS TECHNOLOGY AND FREQUENCY RATIO MODEL. Journal of Geomechanics, 23 (1): 97-104.
Citation: QI Xin, HUANG Bo-lin, LIU Guang-ning, et al., 2017. LANDSLIDE SUSCEPTIBILITY ASSESSMENT IN THE THREE GORGES AREA, CHINA, ZIGUI SYNCLINAL BASIN, USING GIS TECHNOLOGY AND FREQUENCY RATIO MODEL. Journal of Geomechanics, 23 (1): 97-104.

基于GIS技术和频率比模型的三峡地区秭归向斜盆地滑坡敏感性评价

基金项目: 

中国地质调查局“三峡库区巴东段岸坡改造调查”项目 12120114079301

详细信息
    作者简介:

    齐信(1983-), 男, 硕士, 工程师, 主要从事水工环方面的调查与研究工作。Email:qx_cdut@126.com

  • 中图分类号: P642.22P208

LANDSLIDE SUSCEPTIBILITY ASSESSMENT IN THE THREE GORGES AREA, CHINA, ZIGUI SYNCLINAL BASIN, USING GIS TECHNOLOGY AND FREQUENCY RATIO MODEL

  • 摘要: 以三峡地区秭归向斜盆地为研究区,在野外滑坡编图的基础上,选择地形坡度、地层岩性、河流、道路、坡向、坡型结构6个因子参与滑坡敏感性评价,运用GIS空间分析技术,引入频率比模型,分别计算评价因子的贡献率,并进行叠加分析,最终划分为4个敏感性分区。评价结果表明:极高敏感性区面积占21.39%,滑坡发生面积占61.44%;高敏感性分区面积占24.99%,滑坡发生面积占21.67%;中敏感性分区面积占30.66%,滑坡发生面积占13.19%;低敏感性分区面积占22.93%,滑坡发生面积占3.69%。滑坡敏感性面积累计百分比曲线图表明评价结果具有较高的准确度和可靠性。研究成果可为政府部门减灾防灾工程提供科学支持,为滑坡灾害的预测和管理提供科学依据。

     

  • 图  1  研究区滑坡分布图

    Figure  1.  The distribution map of landslides in the study area

    图  2  严坪滑坡群(镜向290°)

    Figure  2.  The landslide group of Yanping

    图  3  研究区地形坡度分类图

    Figure  3.  Topographic slope classification map of the study area

    图  4  研究区地层岩性分类图

    Figure  4.  The Lithology classification figure of the study area

    图  5  研究区坡向分类图

    Figure  5.  The aspect classification figure of the study area

    图  6  研究区河流Buffer分类图

    Figure  6.  Stream Buffer classification figure of the study area

    图  7  研究区道路Buffer分类图

    Figure  7.  Road Buffer classification figure of the study area

    图  8  斜坡分类准则

    Figure  8.  The bedding-aspect classification criteria

    图  9  研究区斜坡分类图

    Figure  9.  The bedding-aspect classification figure of the study area

    图  10  滑坡敏感性分区图

    Figure  10.  The zoning map of landslide susceptibility

    图  11  滑坡敏感性分区面积与滑坡发生面积百分比

    Figure  11.  The percentage histogram between zoning area of landslide susceptibility and landslide area

    图  12  频率比模型法滑坡敏感性面积累计百分比曲线图

    Figure  12.  Requency ratio model shows cumulative percentage curve of landslide sensitive area

    表  1  滑坡敏感性频率比值

    Table  1.   Frequency ratio of landslide susceptibility

    敏感性评价因子 分类 滑坡面积/km 2 滑坡面积百分比/% 子因子面积/km2 子因子面积百分比/% 频率比
    地形坡度 0~10° 1.53 6.45 24.91 5.65 1.14
    10~20° 7.70 32.51 86.40 19.60 1.66
    20~30° 9.28 39.20 145.34 32.97 1.19
    30~40° 4.16 17.55 120.08 27.24 0.64
    40~50° 0.88 3.72 52.77 11.97 0.31
    50~60° 0.13 0.56 10.70 2.43 0.23
    > 60° 0.00 0.01 0.64 0.14 0.05
    地层岩组 第四系 0.46 1.95 1.87 0.42 4.59
    蓬莱镇组 12.11 51.18 94.96 21.54 2.38
    遂宁组 3.11 13.15 85.46 19.38 0.68
    沙溪庙组二段 1.87 7.89 83.29 18.89 0.42
    沙溪庙组一段 2.06 8.70 103.40 23.45 0.37
    聂家山组 1.21 5.11 36.52 8.28 0.62
    筒竹园组 0.84 3.57 7.19 1.63 2.18
    沙镇溪组 0.33 1.38 3.08 0.70 1.97
    巴东组三四段 0.94 3.98 8.62 1.95 2.03
    巴东组二段 0.58 2.45 6.95 1.58 1.55
    巴东组一段 0.00 0.00 1.81 0.41 0.00
    坡向 Flat 0 0 0.34 0.08 0
    N 2.10 8.87 46.57 10.56 0.84
    NE 3.07 12.99 60.38 13.70 0.95
    E 4.69 19.81 65.16 14.78 1.34
    SE 4.66 19.70 69.23 15.70 1.25
    S 2.56 10.80 51.49 11.68 0.93
    SW 1.52 6.43 44.20 10.03 0.64
    W 3.31 13.97 58.81 13.34 1.05
    NW 1.76 7.43 44.67 10.13 0.73
    河流Buffer < 500 m 11.06 46.73 129.95 29.48 1.59
    500~1000 m 6.47 27.33 98.87 22.43 1.22
    1000~1500 m 2.98 12.60 74.68 16.94 0.74
    1500~2000 m 2.00 8.45 47.70 10.82 0.78
    > 2000 m 1.16 4.89 89.65 20.34 0.24
    道路Buffer < 500 m 12.06 50.94 123.88 28.10 1.81
    500~1000 m 5.77 24.37 83.73 18.99 1.28
    1000~1500 m 3.17 13.41 63.02 14.29 0.94
    1500~2000 m 1.14 4.84 48.60 11.02 0.44
    > 2000 m 1.53 6.45 121.61 27.59 0.23
    斜坡结构 逆向坡 0.60 0.60 0.60 0.60 0.60
    逆切坡 0.60 0.60 0.60 0.60 0.60
    顺切坡 1.05 1.05 1.05 1.05 1.05
    顺向坡 1.48 1.48 1.48 1.48 1.48
    下载: 导出CSV

    表  2  滑坡敏感性评价结果

    Table  2.   Resultsof landslidesusceptibility

    敏感性分区 滑坡发生面积/km2 滑坡发生面积占比/% 敏感性分区面积/km2 敏感性分区面积占比/% 比率
    低敏感性区 0.87 3.69 101.06 22.93 0.16
    中敏感性区 3.12 13.19 135.25 30.69 0.43
    高敏感性区 5.13 21.67 110.12 24.99 0.87
    极高敏感性区 14.55 61.44 94.26 21.39 2.87
    下载: 导出CSV
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  • 收稿日期:  2016-05-14
  • 刊出日期:  2017-02-01

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