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现代地质 ›› 2023, Vol. 37 ›› Issue (04): 1013-1022.DOI: 10.19657/j.geoscience.1000-8527.2022.086

• 灾害地质学 • 上一篇    下一篇

北京市门头沟区达摩沟泥石流发育特征与危险性评价

聂琼1(), 聂治豹2, 陈剑3(), 丁士君2, 吴赛儿3, 李多3, 葛润泽3, 陈瑞琛3   

  1. 1.国家电网有限公司,北京 100031
    2.中国电力科学研究院有限公司,北京 100192
    3.中国地质大学(北京)工程技术学院,北京 100083
  • 收稿日期:2022-10-01 修回日期:2022-11-07 出版日期:2023-08-10 发布日期:2023-09-02
  • 通讯作者: 陈 剑,男,教授,1975年出生,地质工程专业,主要从事地质灾害与工程地质等方面的教学与科研工作。Email:jianchen@cugb.edu.cn
  • 作者简介:陈 剑,男,教授,1975年出生,地质工程专业,主要从事地质灾害与工程地质等方面的教学与科研工作。Email:jianchen@cugb.edu.cn
    聂 琼,男,高级工程师,1983年出生,输电工程专业,主要从事工程技术管理、地质灾害等方面的研究。Email: 11378933@qq.com
  • 基金资助:
    国家自然科学基金面上项目(41571012);中国电力科学研究院有限公司委托项目(33012022021)

Development Characteristics and Risk Assessment of the Damogou Debris Flow in Mentougou District, Beijing

NIE Qiong1(), NIE Zhibao2, CHEN Jian3(), DING Shijun2, WU Saier3, LI Duo3, GE Runze3, CHEN Ruichen3   

  1. 1. China State Grid Corporation, Beijing 100031, China
    2. China Electric Power Research Institute Ltd., Beijing 100192, China
    3. School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
  • Received:2022-10-01 Revised:2022-11-07 Online:2023-08-10 Published:2023-09-02

摘要:

泥石流是北京西部、北部山区雨季最常见的地质灾害类型之一。北京市门头沟区清水镇达摩沟历史上曾发育多期泥石流灾害,目前仍存在大量人工堆积物和崩塌堆积等泥石流潜在物源,存在明显的泥石流隐患。本文查明了北京门头沟区达摩沟泥石流物源类型、储量与分布情况,并针对10年一遇、20年一遇、50年一遇和100年一遇4种极端降雨频率工况,基于二维动力模型(FLO-2D)分析了达摩沟泥石流的运动学特征,模拟了泥石流隐患影响范围并进行危险性分区评价。调查结果表明,泥石流潜在物源以人工弃渣煤矸石为主,沟道堆积物与崩滑堆积物为辅,物源静储量共计约为44.7×104 m3,泥石流流态性质整体呈现稀性特点。综合4种降雨情况模拟结果,可判断达摩沟泥石流高危险区主要分布在沟口堆积区及主、支沟汇流处,占流域面积比例为13.1%~20.0%,中危险区与低危险区所占比例分别为29.9%~31.2%和48.8%~57.0%。建议在达摩沟流通区设置上游拦截、下游排导的防治措施,并在暴雨季节加强形成区的雨量监测预警。

关键词: 泥石流, 达摩沟, 二维动力模型, 数值模拟, 危险性评价, 北京门头沟区

Abstract:

Debris flow is one of the most common types of geological disasters in western and northern Beijing mountainous areas during stormy seasons. In the history of Damogou Gully (Qingshui town, Mentougou district, Beijing), there were many periods of debris flow disasters. At present, there are still many artificial deposits and collapse accumulations that constitute a potential debris flow source, and there are serious debris flow hidden dangers. This study identifies the types of debris flow sources, their storage and distribution, simulates the debris flow impact range under the frequency of once every 10, 20, 50 and 100 year rainfall, and evaluates their respective risk. The results show that the potential debris flow source is mainly man-made waste slag and coal gangue, with the residual reserve of ~447,000 m3. The high-risk debris flow area accounts for 13.1%-20.0%, mainly distributed in the gully mouth accumulation area and the confluence of main and branch gullies. The proportion of medium-risk area is 29.9%-31.2%, and the proportion of low-risk area is 48.8%-57.0%. It is advisable to set up prevention and control measures of upstream interception and downstream drainage in the circulation area of Damogou gully, and strengthen the rainfall monitoring and warning in the formation area in the heavy rainfall seasons.

Key words: debris flow, Damogou Gully, FLO-2D, numerical simulation, risk assessment, Mentougou district, Beijing

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