摘要
为了快速、准确地模拟洪水演进过程,将元胞自动机和二维圣维南方程相结合,构建了基于元胞自动机的洪水演进模型,实现了元胞间的局部水量交换,以及全流域洪水模拟过程的全局转换。接着,创新性地构建了基于DEM的单元栅格大伙房产流模型并将其作为元胞产流输入,将直接径流、地面壤中流和邻域元胞入流共同作为水深增量,充分考虑到了降雨对河道滩地洪水演进模拟带来的影响。以浑河沈阳城区河段物理模型试验数据为基础,选取了不同设计频率洪水进行实例验证与分析。分析结果表明:水深的模拟具有较高的精度;流速总体上满足模拟需求;淹没范围具有相同的变化趋势,具有合理性和有效性。研究结果可为洪水演进模拟提供一种新方法,同时对其他相似地区洪水演进模拟工作也具有借鉴意义。
To simulate the flood routing quickly and accurately,we constructed a flood routing model by combining the principle of cellular automata and two-dimensional Saint-Venant equation in this paper.The flood routing model could realize the partial water exchange between cells and the global transformation of the flood simulation process in the whole basin.The Dahuofang runoff-yield model with grid element was constructed on the basis of DEM,and it could provide runoff generation input for each cell.In this model,direct runoff,surface soil flow and neighborhood cell inflow were all water depth increment,which fully considered the impact of rainfall on flood routing simulation in the flood plain.In this paper,the physical model results of different design frequency floods in Shenyang section of Hunhe River were selected to verify the simulated results.The results show the water depth simulation had high accuracy and the flow velocity simulation can meet basic requirements.Also,the simulation result of submergence scope had the same change trend as the physical model results,indicating that the model was reasonable and effective.Therefore,this paper can provide a new method for flood routing simulation,and provide reference for flood routing simulation in other similar areas.
作者
刘恒
LIU Heng(Research Institute Limited Liability Company of Water Resources and Hydropower,Shenyang 110003,China)
出处
《人民长江》
北大核心
2020年第5期7-16,共10页
Yangtze River
基金
水利部公益性行业科研专项经费项目(200801040)
水利部科技推广计划项目(TG1142)
辽宁省农业攻关计划项目(2011216001)。
关键词
洪水演进
元胞自动机
二维圣维南方程
大伙房水文模型
浑河沈阳城区河段
flood routing
cellular automata
two-dimensional Saint-Venant equation
Dahuofang Hydrological Model
Shenyang section of Hunhe River
