永定河泛区洪水调度数值模拟  

Flood Dispatching Numerical Simulation for Detention Basins of Yongding River

作　　者：李大鸣[1] 王笑[1] 赵明雨 张建中[2] 刘思清[2] 刘江侠[2] 

机构地区：[1]水利工程仿真与安全国家重点实验室(天津大学),天津300072 [2]水利部海河水利委员会科技咨询中心,天津300170

出　　处：《天津大学学报（自然科学与工程技术版）》2015年第1期76-86,共11页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金创新研究群体科学基金资助项目(51321065);河北省水利科研计划资助项目(HS2007-43)

摘　　要：提出了具有旁侧出流的河网独立计算的一、二维多口门嵌套衔接模式,建立了一维河道嵌套于平面二维永定河泛区洪水演进水流数学模型.结合历史调查洪水资料对永定河泛区洪水演进进行了模型验证,二者结果基本吻合.应用该模型对永定河泛区洪水调度方案进行了模拟,先后模拟了无机场、机场近期建设后和远期建设后3种工况下的洪水演进过程.分析对比机场建设前后各分洪区洪水位、滞洪量、淹没范围的变化.模拟结果显示,各分洪口门启用时间稍微提前,机场建设区寺垡辛庄口门启用次序稍有变化,水位的雍高、分洪量的增量、淹没范围的变化对泛区洪水调度方案影响较小,表明了机场建设的可行性.该研究为淹没区的洪灾损失评估及相应的防洪调度方案修订提供了必要的参数和依据.The one-dimensional and two-dimensional linkup model of many diversion entrances nested was put forward,which has independent river network computing with side discharging,and the mathematical model of onedimensional river coupled with two-dimensional horizontal flood routing was established. Combining with the historical flood investigation data,model validation was carried out on the evolution of Yongding river detention basins,and the results are basically consistent with the measured results. The proposed model was applied to the simulation of flood dispatching scheme in Yongding river detention basins,simulating the flood routing process under three working conditions,that is,without the airport,after recent construction and after long-term construction. By analyzing and comparing the variation of flood level,detention volume,submerged area before and after the construction of the airport,the simulation results show that each flood diversion entrance opens earlier,that the opening order of Sifaxinzhuang village diversion entrance changes,and that higher water level,increment of flood diversion and variation of submerged areas have little effect on the dispatching scheme,indicating the feasibility of the airport construction. The study provides necessary parameters and basis for the flood damage assessment of flood inundation area and the amendment of corresponding dispatching scheme.

关 键 词：永定河泛区 洪水演进 一、二维衔接模型 有限体积法 

分 类 号：TV122[水利工程—水文学及水资源]