| 基于ArcGIS＋DEM的三眼峪泥石流水动力条件分析 |
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| 引用本文： | 于国强,张茂省,魏新平,毕远宏. 基于ArcGIS＋DEM的三眼峪泥石流水动力条件分析[J]. 西北地质, 2011, 44(3): 53-62 |
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| 作者姓名： | 于国强 张茂省 魏新平 毕远宏 |
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| 作者单位： | 1. 中国地质调查局西安地质调查中心,陕西西安,710054
2. 甘肃省地质环境监测院,兰州,730050 |
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| 基金项目： | 国土资源大调查计划项目"西北黄土高原区地质灾害详细调查"，国土资源大调查项目"甘肃省白龙江流域主要城镇环境工程地质勘查"，中国博士后科学基金 |
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| 摘 要： | 通过对甘肃省舟曲三眼峪特大泥石流灾害的现场调查，从泥石流形成的地形地貌条件和水动力条件人手，以ArcGIS为平台，运用DEM数据，分析了特大泥石流灾害的三区地形地貌特征、固体松散物特征、降雨特征以及泥石流静力学和动力学特征。结果表明：三眼峪三区为泥石流的形成和径流流通提供了极为有利地形条件；固体松散物质补给量潜力巨大，会导致堰塞坝的放大效应；诱发此次特大山洪泥石流是一场局地性、短时强度大的暴雨过程，泥石流容重在2．10t·m^-3左右，属于高容重黏性泥石流；泥石流屈服应力在8000Pa以上，大小眼峪（降雨汇流区）及三眼峪（泥石流堆积区）泥石流流速分别为8．97m／s、7．06m／s和6．02m／s，洪峰流量分别为1659m^3／s、1553m^3／s和1896m^3／s，冲击力分别为46676tf、40236tf和21182tf，其破坏力巨大，危害严重，使得泥石流在汇流区破坏力巨大以切蚀为主，受地形影响，三眼峪出口处，冲击力减小，泥石流发生堆积。
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| 关 键 词： | 泥石流 三眼峪 地形地貌 水动力条件 |
Analysis on the Hydrodynamic Conditions for the Massive Debris Flow in Sanyanyu Based on ArcGIS and DEM |
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| YU Guo-qiang,ZHANG Mao-sheng,WEI Xin-ping,BI Yuan-hong. Analysis on the Hydrodynamic Conditions for the Massive Debris Flow in Sanyanyu Based on ArcGIS and DEM[J]. Northwestern Geology, 2011, 44(3): 53-62 |
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| Authors: | YU Guo-qiang ZHANG Mao-sheng WEI Xin-ping BI Yuan-hong |
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| Affiliation: | YU Guo-qiang1,ZHANG Mao-sheng1,WEI Xin-ping2,BI Yuan-hong2(1.Xi'an Center of Geological Survey,CGS,Xi'an 710054,China,2.Gansu Institute of Geological Environment Monitoring,Lanzhou 730050,China) |
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| Abstract: | The terrain and topographical characteristics loosening solid matter characteristics and rainfall characteristics as well as statics and dynamic characteristics of giant debris flow were obtained by field investigation and analysis on the debris flow hydrodynamic force conditions based on platform of ArcGIS and using DEM.The results show that the terrain and topographical can provide favorable condition for formation and running of runoff.The amount of loosening solid matter is so great that amplify dam.The... |
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| Keywords: | debris flow sanyanyu terrain and topographical hydrodynamic condition |
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