溃坝洪水的数学模型应用  

Application of mathematical model for dam-break flood flow

作　　者：胡晓张 张小峰[2] 

机构地区：[1]珠江水利科学研究院,广东广州510611 [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：《武汉大学学报（工学版）》2011年第2期178-181,共4页Engineering Journal of Wuhan University

基　　金：国家重大基础研究计划"973"项目(编号:2003CB415203)

摘　　要：根据溃坝洪水传播和运动的特点,采用守恒性较好和能够捕捉间断波的有限体积法,建立了一个包括上游库区洪水演进、溃坝过程和下游淹没影响区洪水演进的溃坝洪水数学模型,并采用经验公式和实验结果分别对溃口流量和二维溃坝洪水传播进行了验证.利用所建立的数学模型对某水库溃坝洪水演进和传播过程进行了模拟计算,溃口流量变化过程、坝上水位变化、溃坝洪水淹没过程和水量守恒等结果分析,表明所建立的溃坝洪水数学模型能较好地模拟洪水从库尾向坝址的传播以及溃坝洪水在下游淹没影响区的演进过程,并且模型计算结果完全能满足水量守恒,可以用于实际工程计算.Base on the spread and movement character of dam-break flood,the author introduced the finite volume method（FVM） that is good at conservation and catching gap,and build a dam-break mathematical model,which comprises flood flow upstream reservoir,dam-break process and flood flow downstream flood-influencing area,the model respectively validated dam-breach discharge by experiential formula,2D dam-break flood flow by experiment result.And then the model is used for simulating dam-break flood flow of a reservoir;through analyzing dam-breach discharge,water level before the dam,Dam-break flood submerge and spread movement and water quantity conservation,it is shown that the model can simulate dam-break flood propagation from the reservoir tail to the dam site and advancing downstream flood-influencing area,and the model can be using for practical engineering.

关 键 词：溃坝洪水 数学模型 有限体积法 

分 类 号：TV122.4[水利工程—水文学及水资源]