| 雅鲁藏布江色东普沟冰崩—堵江—溃决灾害数值模拟 |
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| 引用本文： | 田杨杨,姜亮,郭江.雅鲁藏布江色东普沟冰崩—堵江—溃决灾害数值模拟[J].地质学刊,2023,47(2):196-202. |
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| 作者姓名： | 田杨杨 姜亮 郭江 |
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| 基金项目： | 西藏自治区自然资源项目“监测示范工程”（SCXX-XZCG-20098） |
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| 摘 要： | 为了揭示雅鲁藏布江色东普沟2018年10月17日冰崩—堵江—溃决灾害链的动力演化过程，基于Massflow数值模拟仿真平台，使用Fortran编程语言，根据研究区域地质条件特征对程序进行二次开发以优化Voellmy模型，模拟冰崩—泥石流动力过程；将模拟泥石流得到的堰塞坝体嵌入地形中，运用ArcGIS计算堰塞湖范围及体积，通过Manning模型模拟堰塞湖溃决洪水动力过程。采用分段模拟法再现冰崩—泥石流—堵江—堰塞湖—溃坝的完整动力过程，对泥石流运动过程中的流速、流深，坝体高度，溃决洪水的流深、流速等参数进行定量化研究，为色东普流域的防灾减灾工作提供有效支撑。为了揭示雅鲁藏布江色东普沟2018年10月17日冰崩-堵江-溃决灾害链的动力演化过程，采用Massflow数值模拟仿真平台，以Fortran语言为编程手段，根据研究区域地质条件特征对程序进行二次开发优化Voellmy模型，模拟冰崩-泥石流动力过程；将模拟泥石流所得到的堰塞坝体嵌入地形中，采用ArcGIS计算堰塞湖范围及体积，通过曼宁模型模拟堰塞湖溃决洪水动力过程。采用分段模拟法再现冰崩-泥石流-堵江-堰塞湖-溃坝的完整动力过程，对泥石流运动过程中的流速、流深，坝体高度，溃决洪水的流深、流速等参数进行定量化研究，为色东普流域的防灾减工作提供有效支撑。
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| 关 键 词： | 冰崩 泥石流 堰塞湖 灾害链 Massflow数值模拟 色东普沟 雅鲁藏布江 |
Numerical simulation of glacier avalanche-river blocking-outburst in Sedongpu gully of the Yarlung Zangbo River |
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| Tian Yangyang,Jiang Liang,Guo Jiang.Numerical simulation of glacier avalanche-river blocking-outburst in Sedongpu gully of the Yarlung Zangbo River[J].Jiangsu Geology,2023,47(2):196-202. |
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| Authors: | Tian Yangyang Jiang Liang Guo Jiang |
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| Abstract: | To reveal the dynamic evolution process of the glacier avalanche-river blocking-bursting disaster chain in Sedongpu gully, Yarlung Zangbo River on October 17, 2018, Massflow numerical simulation platform and Fortran language were used to simulate dynamic process of glacier avalanche and debris flow by conducting secondary development and optimization of the Voellmy model according to the characteristics of regional geological conditions. The barrier lake dam obtained from simulated debris flow model was embedded into the terrain model, its scope and volume were calculated by ArcGIS, and the dynamic process of its bursting flood was simulated by Manning model. The complete dynamic process of glacier avalanche-debris flow-river blocking-barrier lake-dam bursting was reproduced by piecewise simulation method, and the parameters of flow velocity, flow depth and dam height in the process of debris flow, and flow depth and flow velocity of bursting flood were quantitatively studied, to provide effective support for disaster prevention and reduction in Sedongpu Basin. |
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| Keywords: | glacier avalanche debris flow barrier lake disaster chain Massflow numerical simulation Sedongpu gully Yarlung Zangbo River |
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