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四川凉山州冕宁县彝海镇“6·26”大型泥石流成因分析

杨柳青, 陈容, 贺拿, 罗南会. 四川凉山州冕宁县彝海镇“6·26”大型泥石流成因分析[J]. 中国地质灾害与防治学报, 2023, 34(1): 94-101. doi: 10.16031/j.cnki.issn.1003-8035.202112030
引用本文: 杨柳青, 陈容, 贺拿, 罗南会. 四川凉山州冕宁县彝海镇“6·26”大型泥石流成因分析[J]. 中国地质灾害与防治学报, 2023, 34(1): 94-101. doi: 10.16031/j.cnki.issn.1003-8035.202112030
YANG Liuqing, CHEN Rong, HE Na, LUO Nanhui. Analysis of the cause of the“6·26” large debris flow in Yihai Town, Mianning County, Liangshan Prefecture, Sichuan Province[J]. The Chinese Journal of Geological Hazard and Control, 2023, 34(1): 94-101. doi: 10.16031/j.cnki.issn.1003-8035.202112030
Citation: YANG Liuqing, CHEN Rong, HE Na, LUO Nanhui. Analysis of the cause of the“6·26” large debris flow in Yihai Town, Mianning County, Liangshan Prefecture, Sichuan Province[J]. The Chinese Journal of Geological Hazard and Control, 2023, 34(1): 94-101. doi: 10.16031/j.cnki.issn.1003-8035.202112030

四川凉山州冕宁县彝海镇“6·26”大型泥石流成因分析

  • 基金项目: 中国科学院战略性先导科技专项(A类)子课题(XDA23090303);四川省科技计划资助(2019YFH0040);河南省博士后经费资助(19030069)
详细信息
    作者简介: 杨柳青(1996-),男,河南周口人,硕士研究生,主要从事山地灾害防治方面的研究工作。E-mail:ylqeasy@163.com
    通讯作者: 贺 拿(1984-),男,河南永城人,博士,副教授,硕士生导师,主要从事山地灾害防治方面的教学和研究工作。E-mail:hn61886@163.com
  • 中图分类号: P642.23

Analysis of the cause of the“6·26” large debris flow in Yihai Town, Mianning County, Liangshan Prefecture, Sichuan Province

More Information
  • 2020年6月26日晚21时左右,彝海镇大马乌村和大堡子村爆发大型山洪泥石流,此次泥石流灾害造成重大人员伤亡及财产损失。灾后通过收集当地基础资料,结合现场调访及野外勘察等手段分析泥石流成因:此次泥石流是由于前期地震及人类工程活动影响下,导致该流域松散固体物质丰富且未及时疏通治理;流域中上游坡体坡度较大,地势陡峭,为泥石流发育提供了良好的自然条件,6月26日晚上突降特大暴雨,超出降雨阈值,造成安宁河洪水泛滥,冲毁堤坝,引发特大泥石流。此次泥石流灾害给我们以重大警示:应加强泥石流防灾减灾知识宣传,指导当地居民选择合理场地进行工程活动并及时疏通河道,加强山地灾害监测预警,完善群测群防体系建设。

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  • 图 1  泥石流灾害情况

    Figure 1. 

    图 2  泥石流研究区位置

    Figure 2. 

    图 3  研究区基本概况[8]

    Figure 3. 

    图 4  沟道中碎石

    Figure 4. 

    图 5  流经村庄泥痕

    Figure 5. 

    图 6  冕宁县地质灾害发生分布月份

    Figure 6. 

    图 7  安宁河沟流域示意图

    Figure 7. 

    图 8  退林还耕

    Figure 8. 

    图 9  彝海镇不同监测点6月26日18:00至6月27日1:00累计降雨量

    Figure 9. 

    图 10  安宁河沟目前松散物源

    Figure 10. 

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出版历程
收稿日期:  2021-12-26
修回日期:  2022-06-18
刊出日期:  2023-02-25

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