摘要
四川"5·12"汶川大地震形成的34个主要堰塞湖,超过半数处于中危以上,需要及时开展溃决风险评估和应急处置。应用数字流域模型和水动力学模型,在资料匮乏的条件下,快速预报了典型堰塞湖的来流入库过程和溃口发展过程,模拟了不同应急预案条件下的洪水传播过程,为堰塞湖溃决风险评估和应急处置提供了有效依据。将来需要进一步建立集来流预报、泄流溃决、洪水淹没及优化措施分析为一体的完整模型体系,以应对基本数据匮乏条件下的应急预警预报和优化决策需求。
The 8.0-magnitude Wenchuan earthquake triggered huge landslides that blocked rivers and created more than 34 quake lakes including the Tangjiashan one on the Jianjiang River in Beichuan County. More than 17 quake lakes were in moderately dangerous situations and needed to be tackled in emergency for hazards relief. The Digital Watershed Model （DWM） and hydrodynamic models developed at Tsinghua University were adopted for quickly forecasting the incoming flow discharge and dam-breach processes of the Tangjiashan Quake Lake. Dam break seenarios of typical quake lakes were also simulated for outburst flood routing in downstream rivers and the simulation results were used for the design of emergency treatment plans. To meet the need of emergency forecasting and treatment of quake lakes in areas with limited data, it is desirable to set up an integrated modeling system that functions as hydrological forecasting, dam breach analysis, inundation analysis, and optimal decision of engineering measures.
出处
《中国水土保持科学》
CSCD
2008年第5期1-6,共6页
Science of Soil and Water Conservation
基金
国家自然科学基金项目"四川唐家山堰塞湖土石坝漫顶泄洪
决口冲刷及溃决风险加急研究"(50849003)
国家973项目"复杂条件下坝堤溃决机理与风险调控理论"(2007CB714100)
关键词
地震
堰塞湖
溃决
应急处置
汶川
earthquake
quake lake
dam breach
emergency treatment
Wenchuan
