通口河唐家山至苦竹坝河段未来冲刷深度估算  

Estimation on scouring depth of Tangjiashan-Kuzhuba reach of Tongkou River

作　　者：周静[1] 袁悦 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072 [2]CPE西南分公司,四川成都610017

出　　处：《人民长江》2013年第24期17-19,共3页Yangtze River

基　　金：国家"5.12"地震灾后重建项目资助(A210KX)

摘　　要：2008年"5·12"地震后,唐家山堰塞坝在泄洪过程中发生局部垮塌,造成唐家山至苦竹坝坝址河道发生剧烈演变,原河道被填埋,重新形成一条新河道,近几年来新河道仍处于明显的演变调整之中。为了预测新河道未来的冲刷情况,以2012年11月的实测断面为冲刷深度估算的代表断面,采用河流动力学最大启动粒径公式,对该段河道未来的演变情况进行了估算。结果表明:该河段仍将保持冲刷下切态势,河道平面变化仍然频繁和明显。After ＂5.12＂ earthquake in 2008, local collapse occurred in the excavation of Tangjiashan barrier dam for flood discharge, resulting in dramatic change of Tangjiasha - Kuzhuba reach of Tongkou River, the original river channel was buried and a new river was formed. The new river still varies obviously in recent years. In order to predict the future scouring condition of the new river channel, the measured scouring cross- section in Dec. 2011 was selected as a representative section, and the fluvial evolution of this reach was estimated using velocity formula of sediment incipient. The analysis results show that the river reach will maintain scouring, and the transversal variation of channel will be frequent and obvious in the future.

关 键 词：河道演变 冲刷深度估算 堰塞坝泄洪 苦竹坝坝址 

分 类 号：TV85[水利工程—水利水电工程]