Back Analysis of the Draining Process of the Tangjiashan Barrier Lake
Back Analysis of the Draining Process of the Tangjiashan Barrier Lake
复制标题
唐家山堰塞湖排水过程反分析
DOI：
10.1061/(asce)hy.1943-7900.0000965
复制
发表时间：
2015-04-01
影响因子：
2.4
通讯作者：
Li, Xu
中科院分区：
文献类型：
--
作者：
Chen, Zuyu;Ma, Liqiu;Li, Xu
摘要本研究试图利用溃坝模型再现唐家山堰塞湖溃坝过程中得到的监测流量过程线，唐家山堰塞湖是由2008年5月12日中国汶川地震引发的滑坡形成的。影响模型结果的关键参数，如土壤侵蚀和突破横向扩大，审查使用现场测量，然后进行广泛的敏感性研究。本文提出了土壤侵蚀速率的双曲线模型和决口侧向扩展的圆弧滑动面方法，使模型结果更加可靠。使用数值方法求解控制方程，该方法允许在Excel 2007电子表格中编码的简单计算。这提供了一个简单，透明和强大的工具，可以使执业工程师进行大坝决口分析，全面了解所涉及的不确定性。这一反分析证实，峰值输出…
AbstractThis study attempts to use a dam breach model to reproduce the well-monitored outflow hydrograph obtained during the dam breaching process of the Tangjiashan barrier lake, which was formed by a landslide triggered by the Wenchuan earthquake on May 12, 2008 in China. The key parameters that affect the model results, such as soil erosion and breach lateral enlargement, are reviewed by using field measurements followed by extensive sensitivity studies. The present paper advocates a hyperbolic model for soil erosion rate and a circular slip surface approach for breach lateral enlargement, which contribute to more reliable model results. The governing equations are solved using a numerical method that allows straightforward calculations coded in an Excel 2007 spreadsheet. This provides an easy, transparent, and robust tool that could enable practicing engineers to perform dam breach analyses with a comprehensive understanding of the uncertainties involved. This back analysis confirms that the peak outf...