两种溃坝模型在唐家山堰塞湖溃决模拟中的对比  

Comparison of two models for back analysis of dam breach of Tangjiashan Barrier Lake

作　　者：李相南[1] 陈祖煜[1] 

机构地区：[1]中国水利水电科学研究院岩土工程研究所,北京100048

出　　处：《水利水电科技进展》2017年第2期20-26,共7页Advances in Science and Technology of Water Resources

基　　金：国家重点基础研究发展计划(973计划)(2013CB036402);国家自然科学基金青年基金(51309260)

摘　　要：基于唐家山堰塞坝溃决的实测数据,使用BREACH模型及中国水科院DB-IWHR模型,对唐家山堰塞坝溃决过程进行了反演分析,并对两种模型进行参数敏感性分析。研究结果表明:使用针对唐家山的参数,两种模型均可较好地反演唐家山溃决洪水的过程,BREACH模型的下游坡比和孔隙率是对结果影响比较敏感的输入参数;DB-IWHR模型在冲刷参数和下游水深计算两方面做了改善,较好地解决了这一问题;DB-IWHR提供了一个Excel格式的计算软件,数值分析稳定性好,使用简洁客观,可供类似堰塞湖应急处置时参考。Based on measured data of the dam breach of Tangjiashan Barrier Lake, the process of the dam breach was analyzed using the BREACH model and the DB-IWHR model developed by the China Institute of Water Resources and Hydropower Research. A sensitivity analysis of the two models to different parameters was also perfor^ned. Results show that,using the parameters of the dam,the two models can both reflect the flooding process induced by the dam breach; the calculated results of the peak flow are more sensitive to the input parameters of the downstream slope and porosity in the BREACH model; the DB-IWHR model improves the calculation of the erosion parameter and downstream water depth, resulting in calculated results less sensitive to the input parameters; and the DB-IWHR model provides software in the Excel format,with a high stability in numerical analysis,which is transparent,self-explanatory,and friendly to practitioners.

关 键 词：堰塞湖 BREACH模型 DB-IWHR模型 溃坝洪水分析 唐家山 

分 类 号：TV122.4[水利工程—水文学及水资源]