海南省塔洋河下游段降水丰富, 洪水灾害频发, 急需构建该河段洪水演进分析模型, 为科学防洪减灾措施制定 提供支持。基于塔洋河下游河段实测断面资料与高精度 DEM, 采用 MIKE FLOOD 建立河段一维水动力模型和两 岸洪水威胁区二维水动力模型并实现两者的实时动态耦合, 模拟分析下游河段 50 年一遇洪水漫溢演进过程及淹没 风险, 计算不同时段内洪水淹没范围和水深分布, 并从水量平衡和流场分布等角度对计算结果进行合理性分析。结 果表明, 所建模型能够有效模拟塔洋河下游洪水演进过程及风险分布特征, 计算结果较为合理可靠, 可为区域防汛 指挥、洪水风险管理与防洪预案制定等提供重要基础信息。

The ra infall in t he low er r eaches of the Tayang river is abundant and frequently causes flood disasters. It is urg ent to build a floo d r outing analysis model fo r the river to pr ovide suppo rt fo r the formulation o f scient ific floo d co ntr ol and disaster mitig atio n measures. Based on the measured sectio n data and hig h2precision DEM of the low er reaches of the Tayang river, w e established a 12D hydrodynamic model of the river section and a 22D hydro dy namic model o f the flo od t hr eat zo nes on bo th banks by M IKE FLOOD, and r ealized t he r eal2time dynamic coupling of the tw o. T hen w e analyzed the evo lution pro cess and inundat ion risk o f a 502year flood in the lower r eaches, calculated the inundatio n r ang e and w ater depth dist ribution in differ ent periods, and analyzed the rationalit y of t he calculat ion results using w ater balance analysis and flow field distributio n. The re2 sults show ed that the model can eff ectively simulate the pr ocess of flood routing and risk distributio n in the low er reaches of the Tayang River. T he calculat ion r esults w ere r easonable and reliable, and can pr ov ide important basic info rmation fo r reg ional floo d co ntr ol command, f loo d risk manag ement, and flood contro l plan formulatio n.

国家 重点研发计划资助 项目( 2017YFC0405601 ) ; 高 等学校学科 创新引智计 划( B14012 ) ; 科技 部重点领域 创新团队 ( 2014RA4031)