分洪口门展宽和刷深过程的数值模拟  

Numerical simulation of the breach's expansion and scouring process in flood detention area

作　　者：陈珺[1,2] 张小峰[2] 谈广鸣[2] 唐洪武[1] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《泥沙研究》2008年第6期38-44,共7页Journal of Sediment Research

基　　金：国家重大基础研究计划973项目(2003CB415203)

摘　　要：河道两旁的分洪区能够为河流分蓄超额洪水发挥重要作用,分洪区扒口分洪后口门的展宽和刷深过程的模拟对于抗洪工作具有较为重要的现实意义。本文在应用平面二维水流泥沙数学模型模拟分洪口门纵向冲刷的基础上,考虑了分洪口门横向展宽和崩塌过程的模拟,建立了一种能够模拟分洪口门展宽和刷深的混合数学模型,并将该模型应用于实际分洪区的计算,计算结果表面明该模型能够合理地模拟分洪口门的展宽和刷深过程。The flood detention areas play an important role in flood-preventing project of river, because it can divert and store the excessive flood from the river. Simulating the process of breach＇ s expansion and scouring during the flood diversion of the flood detention area is of practical importance to flood-preventing project. Based on the method of simulating the breach＇ s scouring process, a 2- D mathematical model for unsteady flow and non-uniform sediment is used to simulate the breach＇ s expansion. Finally, a new mixed mathematical model is built. It is applied to simulate the flood diversion process of a flood detention area, and the result shows the proposed model can simulate the process of breach＇s expansion and scouring pattern well.

关 键 词：分洪区 泥沙 展宽 冲刷 数值模拟 

分 类 号：TV142[水利工程—水力学及河流动力学]