| 泥石流容重的内涵诠释及其对灾害防治的启示 |
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| 引用本文： | 黄海,马东涛.泥石流容重的内涵诠释及其对灾害防治的启示[J].地质论评,2022,68(1):205-216. |
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| 作者姓名： | 黄海 马东涛 |
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| 作者单位： | 中国地质科学院探矿工艺研究所, 成都, 611734;中国地质调查局地质灾害防治技术中心, 成都, 611734;中国科学院、水利部成都山地灾害与环境研究所, 成都, 610041 |
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| 基金项目： | 本文为中国地质调查局地质调查项目(编号：DD20190644、20190505)和第二次青藏高原综合科学考察研究项目(编号：2019QZKK0903)的成果 |
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| 摘 要： | 容重是描述泥石流性质的重要基础参数.本文基于泥石流运动过程的时空特征,厘定了最大容重、峰值容重和平均容重3个容重特征值.以蒋家沟1987年以来的泥石流观测数据为分析对象,分析了3个容重特征值在数值上的分布规律和影响因素.结果显示:①最大容重与峰值容重的关系式具有较好的相关性,最大容重与平均容重的关系式具有实际计算适宜性...
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| 关 键 词： | 容重特征值 物理意义 峰值流量 校验方法 灾害防治 |
| 收稿时间： | 2021/6/7 0:00:00 |
| 修稿时间： | 2021/11/2 0:00:00 |
The physical connotation of debris flow density and the enlightenment to geohazards mitigation |
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| HUANG Hai,MA Dongtao.The physical connotation of debris flow density and the enlightenment to geohazards mitigation[J].Geological Review,2022,68(1):205-216. |
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| Authors: | HUANG Hai MA Dongtao |
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| Institution: | 1)Institute of Exploration Technology,CAGS,Chengdu,611734;2)Technical Center for Geological Hazard Prevention and Control,CGS,Chengdu,611734; 3)Institute of Mountain Hazards and Environment,Chinese Academy of Science,Chengdu,610041 |
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| Abstract: | Density is the most fundamental parameter to describe the physical property of debris flow.It is of great significance for evaluation and mitigation of debris flow. Methods: Based on the temporal and spatial characteristics of hydrology process,considered the physical connotation of density,this paper described three characteristic values of debris flow density: max-density,peak-density,and mean-density.By used the debris flow observation data in Jiangjia gully since 1987,the distribution law and influencing factors of density are also analyzed Results: The result shows that those three characteristic density values can be used to express the temporal and spatial evolution of debris flow process.The peak-density and mean-density both can be calculated by max-density.The density value is impacted by the peak discharge of debris flow,but not the Volume.A new method of density calculation,which contains the sampling of debris flow deposit,formula calculation, verification,and the principle of using,are established for debris flow mitigation.The max-density can be recommended for the calculation of peak discharge, velocity,and impact pressure,while the mean-density can be recommended for the calculation of the total volume of soil materials,the danger of river blocking,and the scope of dangerous areas. |
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| Keywords: | characteristic value max-density peak discharge calibration method debris flow mitigation |
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