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基于量化因子的地质灾害易发性评价以重庆市綦江区为例

张复金, 徐曙林, 王平, 蔡诚, 陈怡

张复金,徐曙林,王平,等. 基于量化因子的地质灾害易发性评价−以重庆市綦江区为例[J]. 中国地质灾害与防治学报,2023,34(3): 136-144. DOI: 10.16031/j.cnki.issn.1003-8035.202203042
引用本文: 张复金,徐曙林,王平,等. 基于量化因子的地质灾害易发性评价−以重庆市綦江区为例[J]. 中国地质灾害与防治学报,2023,34(3): 136-144. DOI: 10.16031/j.cnki.issn.1003-8035.202203042
ZHANG Fujin,XU Shulin,WANG Ping,et al. Susceptibility assessment of geological hazards based on susceptibility quantitative factors: A case study in Qijiang District, Chongqing City[J]. The Chinese Journal of Geological Hazard and Control,2023,34(3): 136-144. DOI: 10.16031/j.cnki.issn.1003-8035.202203042
Citation: ZHANG Fujin,XU Shulin,WANG Ping,et al. Susceptibility assessment of geological hazards based on susceptibility quantitative factors: A case study in Qijiang District, Chongqing City[J]. The Chinese Journal of Geological Hazard and Control,2023,34(3): 136-144. DOI: 10.16031/j.cnki.issn.1003-8035.202203042

基于量化因子的地质灾害易发性评价——以重庆市綦江区为例

详细信息
    作者简介:

    张复金(1979-),男,江苏丹阳人,硕士,高级工程师,主要从事地质灾害风险研究等工作。E-mail:25204504@qq.com

    通讯作者:

    徐曙林(1980-),男,江苏泰兴人,学士,高级工程师,主要从事地质灾害防治、矿产资源管理和土地矿产执法等工作。E-mail: 23135248@qq.com

  • 中图分类号: P642.22

Susceptibility assessment of geological hazards based on susceptibility quantitative factors: A case study in Qijiang District, Chongqing City

  • 摘要: 綦江区是重庆市地质灾害高发区域,本研究以綦江区为研究区,根据区内地形地貌、地质构造并结合DEM数据,提取了斜坡单元内的斜坡结构、坡度、地灾点密度、工程地质岩组、距水系距离、岩层倾角和地质构造共7项主要致灾因子,进行量化分析并结合地质灾害野外现场核查和修正其各因子权重和分级赋值后,采用层次分析法进行斜坡单元地质灾害易发性评价,探索建立适合綦江区的地质灾害易发性评价体系。
    Abstract: Qijiang District is a high-risk area for geological hazards in Chongqing. In this study, Qijiang District is selected as the research area. Based on the topography, geomorphology, geological structure, and DEM data of the region, seven main factors of geological hazards within slope units were extracted, including slope structure, slope gradient, density of geological disaster points, engineering geological lithology, distance to the water system, inclination angle of rock strata, and geological structure. These factors were quantitatively analyzed and combined with field inspection of geological hazards to revise the weights and grading of each factor. The analytic hierarchy process was used to evaluate the susceptibility of geological hazards within slope units. Through this process, this study aims to establish a geological disaster susceptibility evaluation system suitable for Qijiang District.
  • 图  1   綦江区地质灾害分布图

    Figure  1.   Distribution map of geological hazards in Qijiang District

    图  2   研究区各评价因子分级图

    Figure  2.   Classification chart of each evaluation factor in the study area

    图  3   綦江区地质灾害易发性分区图

    Figure  3.   Zoning map of geological disaster susceptibility assessment in Qijiang District

    表  1   斜坡结构因子易发性量化指标

    Table  1   Quantitative index of susceptibility factor of slope structure

    地灾
    类型
    斜坡
    结构
    分级面积比 地灾面积
    占比
    易发性指标
    滑坡
    数据
    近水平 0.06 0.01 −1.80
    顺向坡 0.17 0.56 1.20
    斜向坡 0.31 0.17 −0.60
    横向坡 0.30 0.20 −0.40
    逆向坡 0.16 0.06 −1.00
    崩塌
    数据
    近水平 0.06 0.004 −2.78
    顺向坡 0.17 0.105 −0.47
    斜向坡 0.31 0.340 0.09
    横向坡 0.30 0.202 −0.39
    逆向坡 0.16 0.349 0.76
    下载: 导出CSV

    表  2   孕灾体点密度因子易发性量化指标

    Table  2   Quantitative index of susceptibility factor of the point density of the disaster-pregnant body

    地灾
    类型
    斜坡
    结构
    分级面积比 地灾面积
    占比
    易发性指标
    滑坡
    数据
    <0.2 0.47 0.14 −1.33
    [0.2, 0.4) 0.34 0.30 −0.24
    [0.4, 0.6) 0.11 0.24 0.61
    [0.6, 0.8) 0.06 0.24 1.35
    [0.8, 1.0] 0.02 0.08 1.47
    崩塌
    数据
    <0.2 0.47 0.49 0.30
    [0.2, 0.4) 0.34 0.96 0.59
    [0.4, 0.6) 0.11 0.05 0.03
    [0.6, 0.8) 0.06 0.09 0.05
    [0.8, 1.0] 0.02 0.05 0.03
    下载: 导出CSV

    表  3   工程地质岩组因子易发性量化指标

    Table  3   Quantitative index of susceptibility factor of engineering geological lithology

    地灾
    类型
    地质
    岩组
    主要岩性 分级面
    积比
    地灾面积
    占比
    易发性
    指标
    滑坡
    数据
    1 灰岩、白云岩 0.02 0.014 −0.49
    2 含泥质灰岩 0.01 0.004 −1.22
    1 泥岩、砂岩 0.17 0.175 0.08
    2 砂岩夹页岩 0.63 0.761 0.20
    3 厚层状砂岩 0.03 0.013 −0.80
    1 泥灰岩夹粉砂岩、页岩 0.02 0.030 0.52
    2 灰岩夹页岩 0.10 0.001 −4.55
    3 页岩与灰岩 0.02 0.002 −2.40
    崩塌
    数据
    1 灰岩、白云岩 0.02 0.187 2.07
    2 含泥质灰岩 0.01 0.007 −0.69
    1 泥岩、砂岩 0.17 0.040 −1.40
    2 砂岩夹页岩 0.63 0.491 −0.24
    3 厚层状砂岩 0.03 / /
    1 泥灰岩夹粉砂岩、页岩 0.02 0.002 −1.92
    2 灰岩夹页岩 0.10 0.273 1.05
    3 页岩与灰岩 0.02 / /
    下载: 导出CSV

    表  4   坡度因子易发性量化指标

    Table  4   Quantitative index of susceptibility factor of slope gradient

    地灾类型 坡度/(°) 分级面积比 地灾面积占比 易发性指标
    滑坡
    数据
    <10 0.2199 0.161 −0.31
    [10, 20) 0.3969 0.482 0.20
    [20, 30) 0.2530 0.298 0.16
    [30, 40) 0.0949 0.051 −0.61
    [40, 50) 0.0264 0.007 −1.38
    [50, 60) 0.0067 0.001 −1.62
    [60, 70) 0.0017 / /
    >70 0.0005 / /
    崩塌
    数据
    <10 0.2199 0.015 −2.65
    [10, 20) 0.3969 0.090 −1.48
    [20, 30) 0.2530 0.203 −0.22
    [30, 40) 0.0949 0.273 1.07
    [40, 50) 0.0264 0.231 2.19
    [50, 60) 0.0067 0.129 3.02
    [60, 70) 0.0017 0.057 3.78
    >70 0.0005 0.002 3.11
    下载: 导出CSV

    表  5   距水系距离因子易发性量化指标

    Table  5   Quantitative index of susceptibility factor of distance from water system

    地灾
    类型
    距水系
    距离/km
    分级面积比
    地灾面积占比
    易发性
    指标
    滑坡
    数据
    <0.2 0.33 0.612 0.64
    [0.2, 0.4) 0.26 0.176 −0.39
    [0.4, 0.6) 0.18 0.124 −0.38
    [0.6, 0.8) 0.12 0.068 −0.57
    [0.8, 1) 0.06 0.019 −1.16
    ≥1.0 0.05 0.001 −4.35
    下载: 导出CSV

    表  6   岩层倾角因子易发性量化指标

    Table  6   Quantitative index of susceptibility factor of inclination angle of rock strata

    地灾
    类型
    岩层
    倾角/(°)
    分区面
    积比
    地灾面积
    占比
    易发性
    指标
    滑坡
    数据
    <10 0.191 0.225 0.18
    [10, 20) 0.455 0.409 −0.09
    [20, 30) 0.216 0.343 0.48
    [30, 40) 0.081 0.015 −1.70
    [40, 50) 0.038 0.005 −2.06
    [50, 60) 0.015 0.002 −1.86
    [60, 70) 0.003 / /
    >70 0.001 0.001 −0.47
    崩塌
    数据
    <10 0.191 0.4214 0.81
    [10, 20) 0.455 0.1483 −1.10
    [20, 30) 0.216 0.3421 0.48
    [30, 40) 0.081 0.0666 −0.18
    [40, 50) 0.038 0.0210 −0.59
    [50, 60) 0.015 / /
    [60, 70) 0.003 0.0006 −1.83
    >70 0.001 / /
    下载: 导出CSV

    表  7   地质构造因子易发性量化指标

    Table  7   Quantitative index of susceptibility factor of geological structure

    地灾
    类型
    距断层
    距离/km
    分区面
    积比
    地灾面积
    占比
    易发性
    指标
    滑坡
    数据
    (0, 0.5] 0.084 0.139 0.51
    (0.5, 1] 0.079 0.079 0.01
    (1, 1.5] 0.076 0.041 0.63
    (1.5, 2] 0.075 0.068 0.08
    (2, 2.5] 0.073 0.056 0.26
    (2.5, 3] 0.068 0.085 0.23
    (3, 3.5] 0.063 0.023 −0.99
    (3.5, 4] 0.054 0.015 −1.30
    (4, 4.5] 0.045 0.017 −0.95
    (4.5, 5] 0.038 0.018 −1.77
    >5 0.345 0.459 −0.29
    崩塌
    数据
    (0, 0.5] 0.084 0.072 0.09
    (0.5, 1] 0.079 0.133 0.76
    (1, 1.5] 0.076 0.069 0.14
    (1.5, 2] 0.075 0.061 0.04
    (2, 2.5] 0.073 0.003 −3.00
    (2.5, 3] 0.068 0.228 −1.86
    (3, 3.5] 0.063 0.134 −1.99
    (3.5, 4] 0.054 0.088 −1.71
    (4, 4.5] 0.045 0.105 −1.09
    (4.5, 5] 0.038 0.004 −1.90
    >5 0.345 0.103 −0.97
    下载: 导出CSV

    表  8   滑坡影响因素分级层次分析法权重取值表

    Table  8   The weighted value table of the hierarchical analysis for landslide influencing factors

    滑坡评价
    因子
    权重 因子
    分级
    易发性指标
    易发性指标归一化
    斜坡
    结构
    0.20 近水平 −1.80 0.00
    顺向坡 1.20 0.47
    斜向坡 −0.60 0.19
    横向坡 −0.40 0.22
    逆向坡 −1.00 0.13
    地灾点密度 0.17 <0.2 −1.33 0.00
    [0.2, 0.4) −0.24 0.11
    [0.4, 0.6) 0.61 0.22
    [0.6, 0.8) 1.35 0.33
    [0.8, 1.0) 1.47 0.34
    工程地质岩组 0.15 1 −0.49 0.15
    2 −1.22 0.12
    1 0.08 0.17
    2 0.20 0.17
    3 −0.80 0.14
    1 0.52 0.18
    2 −4.55 0.00
    3 −2.40 0.08
    坡度
    /(°)
    0.20 (0, 10] −0.31 0.21
    (10, 20] 0.20 0.30
    (20, 30] 0.16 0.29
    (30, 40] −0.61 0.16
    (40, 50] −1.38 0.04
    (50, 60] −1.62 0.00
    (60, 70] / /
    >70 / /
    距水系距离
    /km
    0.15 <0.2 0.64 0.25
    [0.2, 0.4) −0.39 0.20
    [0.4. 0.6) −0.38 0.20
    [0.6, 0.8) −0.57 0.19
    [0.8, 1.0) −1.16 0.16
    ≥1.0 −4.35 0.00
    岩层
    倾角
    /(°)
    0.08 (0, 10] 0.18 0.25
    (10, 20] −0.09 0.22
    (20, 30] 0.48 0.29
    (30, 40] −1.70 0.04
    (40, 50] −2.06 0.00
    (50, 60] −1.86 0.02
    (60, 70] / /
    >70 −0.47 0.18
    距断层距离
    /km
    0.05 (0, 0.5] 0.51 0.17
    (0.5, 1] 0.01 0.13
    (1, 1.5] −0.63 0.06
    (1.5, 2] −0.08 0.12
    (2, 2.5] −0.26 0.10
    (2.5, 3] 0.23 0.15
    (3, 3.5] −0.99 0.03
    (3.5, 4] −1.30 0.00
    (4, 4.5] −0.95 0.03
    (4.5, 5] −0.77 0.05
    >5 0.29 0.15
    下载: 导出CSV

    表  9   崩塌影响因素分级层次分析法权重取值表

    Table  9   The weighted value table of the hierarchical analysis for the collapse influencing factors

    崩塌评价
    因子
    权重
    因子
    分级
    易发性指标
    易发性指标归一化
    斜坡结构 0.20 近水平 −2.78 0.00
    顺向坡 −0.47 0.21
    斜向坡 0.09 0.26
    横向坡 −0.39 0.22
    逆向坡 0.76 0.32
    地灾点密度 0.15 <0.2 0.30 0.23
    [0.2, 0.4) 0.59 0.45
    [0.4, 0.6) 0.03 0.02
    [0.6, 0.8) 0.05 0.04
    [0.8, 1.0] 0.03 0.02
    >1.0 0.30 0.23
    工程地质
    岩组
    0.20 1 2.07 0.38
    2 −0.69 0.12
    1 −1.40 0.05
    2 −0.24 0.16
    3
    1 −1.92 0.00
    2 1.05 0.29
    3
    坡度
    /(°)
    0.30 (0, 10] −2.65 0.00
    (10, 20] −1.48 0.04
    (20, 30] −0.22 0.08
    (30, 40] 1.07 0.12
    (40, 50] 2.19 0.16
    (50, 60] 3.02 0.19
    (60, 70] 3.78 0.21
    >70 3.11 0.19
    岩层
    倾角
    /(°)
    0.05 (0, 10] 0.81 0.31
    (10, 20] −1.10 0.09
    (20, 30] 0.48 0.27
    (30, 40] −0.18 0.19
    (40, 50] −0.59 0.14
    (50, 60]
    (60, 70] −1.83 0
    >70
    距断层距离
    /km
    0.10 (0, 0.5] 0.09 0.10
    (0.5, 1] 0.76 0.12
    (1, 1.5] 0.14 0.10
    (1.5, 2] 0.04 0.10
    (2, 2.5] −3.00 0.00
    (2.5, 3] −0.86 0.07
    (3, 3.5] 0.99 0.13
    (3.5, 4] 0.71 0.12
    (4, 4.5] 1.09 0.14
    (4.5, 5] −1.90 0.04
    >5 −0.97 0.07
    下载: 导出CSV

    表  10   地质灾害易发性分区统计表

    Table  10   Statistical table of geological disaster susceptibility zones

    易发性等级 高易发区 中易发区 低易发区 非易发区
    斜坡面积/km2 519.99 1021.29 598.93 47.27
    占比/% 23.77 46.69 27.38 2.16
    下载: 导出CSV

    表  11   近年来灾(险)情易发性统计表

    Table  11   Statistical table of geological disasters (hazards) susceptibility in recent years

    易发分区 地灾点数量/个 占比/%
    高易发区 30 58.82
    中易发区 17 33.33
    低易发区 4 7.85
    非易发区 0 0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-27
  • 修回日期:  2022-04-27
  • 网络出版日期:  2023-04-15
  • 刊出日期:  2023-06-24

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