长江科学院院报2017，Vol.34Issue(9)：36-40,5.DOI:10.11988/ckyyb.20160590
一、二维耦合数学模型在感潮河网洪水风险图编制中的应用
Application of a 1-D and 2-D Coupled Mathematical Modelin the Mapping of Tidal River Flood Risk
摘要
Abstract
As the dynamics of tidal river network is complex with runoff and tide confluence, breach discharge in tidal river network is too complex to be estimated by empirical formula accurately.In view of this, a hydrodynamic model coupling 1-D model of river network and 2-D model of reserve area is developed with the breach as the lateral linkage.The model integrates the tidal river network and the reserve area, hence avoiding the deviation of breach discharge caused by the uncertainty of environmental factors and empirical parameters.Simulation results of typical example and embankment-break flood scene show that 1) the jet-flow of breach disperses into the reserve area, and the flow pattern is affected by the underlying surface significantly;2) water level and discharge of the breach change with tide fluctuation, and the calculated total water amount according to breach discharge agrees with that from flooded areadepth.The simulation results reflect the combined influence of underlying surface, water head, tide level and flow pattern on breach flood.The proposed model is rational and reliable in calculating breach discharge and simulating embankment-break flood.关键词
溃决洪水/一、二维耦合数学模型/感潮河网/洪水风险图/侧向联解Key words
embankment-break flood/1-D and 2-D coupling model/tidal river network/mapping of flood risk/lateral linkage分类
建筑与水利引用本文复制引用
杨莉玲,宋利祥,邓军涛,徐爽,胡晓张,孙倩雯..一、二维耦合数学模型在感潮河网洪水风险图编制中的应用[J].长江科学院院报,2017,34(9):36-40,5.基金项目
国家自然科学基金青年基金项目(51409286) （51409286）
