| 摘要: |
| 自20世纪90年代开始,泥石流堵断主河临界条件研究取得了较大进展,开展了多动态室内模拟试验、统计学的相关性分析、动量动能的理论力学分析,取得了基于不同方法的临界条件判别式,但对泥石流堵河的力学形成机制、堵河的数值模拟、堵河原型模拟试验、多时段的遥感运用等方面的研究仍需解决和深入。前人所做的临界条件往往对具体环境下的单沟能够较好适应,而对一定数量的其它泥石流堵河事件往往对比验证较差。对泥石流堵河临界条件的研究需要运用到土力学、水力学等学科的相关理论才能解决。作者认为,在前人研究的基础上,未来研究方向应着重于泥石流堵河机理研究、RS、GIS技术的应用、原型模拟堵河试验及判别式研究,也许能有效地解决泥石流堵河临界条件的科学性和正确性,为实现防灾减灾提供科学的依据。 |
| 关键词: 泥石流 堵河 临界条件 力学分析 |
| DOI： |
| 附件 |
| 投稿时间：2015-06-12修订日期：2015-07-08 |
| 基金项目:成都地质矿产研究所青年基金项目(所控基2014-05);中国地质调查局地质调查项目(12120114069501) |
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| Progress in the research of the critical conditions of river blocking by debris flows |
| SONG Zhi |
| (Chengdu Center, China Geological Survey, Chengdu 610081, Sichuan, China) |
| Abstract: |
| Considerable progress has been made since 1990 in the research of the critical conditions of river blocking by debris flows, including the dynamic simulation test, correlation analysis, theoretical mechanical analysis of momentum and kinetic energy leading to the presentation of various discriminant formulas for critical conditions. The author in this study contends that some aspects remain resolved concerning mechanical mechanism, numerical modeling, prototype simulation test and multiphase remote sensing application to the research of river blocking by debris flows. The techniques such as remote sensing and geographical information system, prototype simulation test and discriminant formulas should also be applied in the future research aiming at providing scientific base for the disaster prevention and reduction. |
| Key words: debris flow river blocking critical condition mechanical analysis |
