北川地震重灾区泥石流特征与减灾对策
文献类型：期刊论文
| 作者 | 胡凯衡 ; 游勇; 陈晓清
|
| 刊名 | 地理科学
 |
| 出版日期 | 2010 |
| 卷号 | 30期号:4页码:566-570 |
| 关键词 | 汶川地震 泥石流 地质灾害 泥石流减灾 |
| 其他题名 | Characteristics and Countermeasures of Debris Flows in Beichuan’s Meizoseismal Area |
| 通讯作者 | 胡凯衡 |
| 中文摘要 | 汶川大地震的同震次生灾害以滑坡、崩塌居多,泥石流相对较少。但地震导致滑坡、崩塌为震后泥石流提供了极为丰富的物质来源,使得地震灾区在一年多的时间里已经多次暴发了大面积的泥石流。以北川地震重灾区的苏宝河和魏家沟流域为研究区域,通过野外实地考察、遥感图像分析、历史资料对比等方法,概括总结出受地震强烈影响区域的泥石流具有成因多样、时间同步、颗粒粗大、多灾种复合、空间近似对称和小沟大灾等特征。并提出了"面上监控为主、点上工程为主、分类防治和开展风险评估"的减灾对策。 |
| 英文摘要 | Coseismic geologic hazards of the Ms 8. 0 Wenchuan Earthquake included a great amount of landslides,rockfalls and avalanches,but few debris flows. However,numerous mass movements such as landslides and avalanches are becoming a plentiful mass source for the formation of debris flows,and many debris-flow events have occurred widely since the earthquake,especially in the meizoseismal area. In this paper,debris-flow ravines at Subaohe and Weijiagou rivers in Beichuan’s Meizoseismal area,southwestern China are studied by field investigation,remote sensing image interpretation and historical data analysis. It is summarized that the formation of these debris flows in the study area can be mainly divided into three classes,viz. direct mobilization from landslide,erosion of unstable slope,and outburst of blocked flood. Other disasters such as flood,landslide,and avalanche were accompanied with the debris flows. The distribution of grains in the debris deposits concentrates on sand,cobble and boulder. The events were closely synchronous because they were triggered by the rainstorms on September,23 ～ 24,and the locations of the ravines show some kind of space symmetry. Another notable feature is that the magnitude of debris flows is large even for those ravines with small catchment area. Finally,four countermeasures mitigating debris flows are proposed against the debris-flow hazards,which can be practically applied to debris-flow prevention. |
| 学科主题 | 灾害学 |
| 分类号 | P642.23 |
| 收录类别 | CSCD |
| 资助信息 | 国家重点基础研究发展计划资助(2008CB425802);中国科学院知识创新工程重要方向项目群项目(KZCX2-YW-Q03-5),中国科学院成都山地灾害与环境研究所创新工程项目 |
| 语种 | 中文 |
| CSCD记录号 | CSCD:3987956 |
| 公开日期 | 2012-05-07 |
| 源URL | [http://192.168.143.20:8080/handle/131551/3921]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 推荐引用方式 GB/T 7714 | 胡凯衡,游勇,陈晓清. 北川地震重灾区泥石流特征与减灾对策[J]. 地理科学,2010,30(4):566-570. |
| APA | 胡凯衡,游勇,&陈晓清.(2010).北川地震重灾区泥石流特征与减灾对策.地理科学,30(4),566-570. |
| MLA | 胡凯衡,et al."北川地震重灾区泥石流特征与减灾对策".地理科学 30.4(2010):566-570. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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