摘要
基于实测断面资料建立了研究区的一维水动力模型,基于高精度DEM以及1∶10000地形图建立了研究区的二维水动力模型,并用MIKE FLOOD将一维模型和二维模型进行耦合,构建了洪泽湖周边滞洪区一、二维耦合的洪水演进数学模型。利用2003年历史洪水资料对模型参数进行了率定,并以2007年历史洪水资料进行了验证。以洪泽湖百年一遇设计洪水为模型上边界,二河闸、三河闸以及高良涧闸的现行调度方案的水位-流量关系为模型下边界,对洪泽湖百年一遇设计洪水方案进行模拟计算,当蒋坝水位达到14.33m时,洪泽湖周边滞洪区开始滞洪,得到开始滞洪后不同时段研究区内各类洪水风险要素的动态分布情况以及最大淹没水深、淹没历时,验证了模型的合理性,可用于蓄滞洪区洪水演算分析。
We established a 1-D hydrodynamic model of the study area with gauged cross-section data,and established a 2-D hydrodynamic model using both high-resolution DEM and a 1∶10000topographic map.Then we coupled the 1Dand 2D models based on MIKE FLOOD and established a 1D-2Dcoupled flood routing mathematical model of Hongze Lake detention basin.The historical flood data in 2003 and 2007were used to calibrate and verify the parameters in this model.We simulated the hundred-year design flood scheme of Hongze Lake with the hundred-year design flood as the upper boundary of the model and the water level-flow discharge curves of Sanhe Gate,Erhe Gate,and Gaoliangjian Gate as the lower boundary of the model.The Hongze Lake detention basin began to detain flood when the water level of Jiangba station exceeded 14.33 m.The generated dynamic distribution of risk elements in the study area when flood detention began verified the rationality of the model.It can be used for flood routing analysis in detention basin.
出处
《南水北调与水利科技》
CSCD
北大核心
2017年第5期56-62,共7页
South-to-North Water Transfers and Water Science & Technology
基金
江苏省普通高校研究生科研创新计划(KYZZ_0145
2015B31914)~~
