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基于面积−高程和面积−坡度积分的泥石流物质供给能力分析

张静 田述军 侯鹏鹂

张静, 田述军, 侯鹏鹂. 基于面积−高程和面积−坡度积分的泥石流物质供给能力分析[J]. 中国地质灾害与防治学报, 2021, 32(4): 9-16. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-02
引用本文: 张静, 田述军, 侯鹏鹂. 基于面积−高程和面积−坡度积分的泥石流物质供给能力分析[J]. 中国地质灾害与防治学报, 2021, 32(4): 9-16. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-02
Jing ZHANG, Shujun TIAN, Pengli HOU. The material supply ability analysis of debris flows based on area-hypsometric integral and area-gradient integral[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 9-16. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-02
Citation: Jing ZHANG, Shujun TIAN, Pengli HOU. The material supply ability analysis of debris flows based on area-hypsometric integral and area-gradient integral[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 9-16. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-02

基于面积−高程和面积−坡度积分的泥石流物质供给能力分析

doi: 10.16031/j.cnki.issn.1003-8035.2021.04-02
基金项目: 国家自然科学基金项目(41971214,41877524);国家重点研发计划项目(2018YFC1505401)
详细信息
    作者简介:

    张静:张 静(1994-),男,四川兴文人,硕士研究生,主要从事地质灾害风险性评价与预测方面的研究工作。E-mail:18181635369@163.com

    通讯作者:

    田述军(1980-),男,四川新津人,博士,副教授,主要从事地质灾害风险性评价与预测方面的研究工作。E-mail:tsj19800702@163.com

  • 中图分类号: X43; X915.5; P642

The material supply ability analysis of debris flows based on area-hypsometric integral and area-gradient integral

  • 摘要: 松散物质是流域侵蚀演化的产物,对于泥石流流域而言,物质供给能力影响着泥石流的易发程度和活动频率。以岷江上游都江堰—汶川部分区域147个泥石流小流域为例,运用面积−高程法和面积−坡度积分对流域地貌演化阶段和侵蚀强度定量划分,并结合地貌演化阶段和侵蚀强度开展泥石流物质供给能力研究。研究结果表明:采用单一的地貌演化阶段或侵蚀强度解释泥石流的易发程度具有一定局限性,泥石流暴发主要集中于壮年期、壮年偏幼年期及侵蚀强度Ⅲ~Ⅴ级;随着物质供给能力的提升,泥石流的暴发率上升,而面积对泥石流的暴发有一定限制作用,初步确定研究区内供给能力处中、强、极强三种水平泥石流流域,其优势发育面积范围分别为:20~35 km2、10~50 km2、10~40 km2;对于物质供给能力水平较高、面积处于优势发育范围内、且长期未有明显泥石流活动迹象的流域,应进一步排查流域松散物质储量和分布特征,确定泥石流活动稳定性,采取合理的防灾减灾措施。
  • 图  1  研究区概况及泥石流分布

    Figure  1.  Study area and debris flow distribution

    图  2  面积−高程曲线(HC)及面积−坡度曲线(GC

    Figure  2.  Hypsometric Curve (HC) and Gradient Curve (GC)

    图  3  地貌演化阶段与侵蚀强度等级划分

    Figure  3.  The geomorphologic evolution stages and erosion intensity

    图  4  供给能力

    Figure  4.  Material supply ability

    图  5  各供给能力下流域面积与泥石流暴发率关系

    Figure  5.  The relationship between outbreaks and basin area under different material supply ability

    表  1  各地貌阶段分级与泥石流暴发情况

    Table  1.   The outbreaks of debris flow and evolution stages

    地貌阶段分级流域数量暴发数量暴发率/%
    幼年期4125.00
    壮年偏幼年期19736.84
    壮年期974445.36
    壮年偏老年期1317.69
    老年期1417.14
    下载: 导出CSV

    表  2  侵蚀强度分级与泥石流暴发情况

    Table  2.   The erosion intensity and outbreaks of debris flow

    侵蚀强度分级流域数量暴发数量暴发率/%
    Ⅰ级1915.26
    Ⅱ级34617.65
    Ⅲ级612845.90
    Ⅳ级281864.29
    Ⅴ级5120.00
    下载: 导出CSV

    表  3  流域供给能力分级与泥石流暴发情况

    Table  3.   Material supply ability and debris flow outbreaks

    供给能力分级流域数量暴发数量暴发率/%
    极弱500
    1300
    40922.50
    522548.08
    极强372054.05
    下载: 导出CSV
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  • 收稿日期:  2020-07-03
  • 修回日期:  2020-09-30
  • 网络出版日期:  2021-08-19
  • 刊出日期:  2021-08-25

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