含井字形河渠的分蓄洪区洪水演进数值模拟  

Numerical simulation of flood evolution in flood diversion and detention area with well-shaped canals

作　　者：张强[1] 何明宪[2] 胡晓张 

机构地区：[1]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 [2]长江航道测量中心,湖北武汉430010 [3]珠江水利科学研究院,广东广州510611

出　　处：《武汉大学学报（工学版）》2009年第3期277-280,共4页Engineering Journal of Wuhan University

基　　金：国家"973"资助项目(编号:2007CB714106);国家自然科学基金资助项目(编号:50579054)

摘　　要：针对分蓄洪区内存在井字形河渠的特殊地形情况,考虑水流在河渠内外区域里运动特点的不同,在现有的分蓄洪区平面二维水流数学模型的基础上,对模型进行扩展,建立了适合模拟含有井字形河渠的分蓄洪区洪水演进的新平面二维水流数学模型.运用模型对概化地形区域进行计算,计算结果表明,井字形河渠内水流流速较快,河渠内水流充满后越过堤防进入相邻区域,水流运动比较符合规律,证明了该模型在理论上和方法上都是可行的.该方法可用于模拟分蓄洪区内含有井字形河渠对洪水演进的影响,为防洪调度提供参考.For the existence of well-shaped canals in the flood diversion and storage area, considering the different characteristics of flow inside and outside of the canals, based on the existing planar 2-D water flow mathematical model for flood diversion and detention area, the new planar 2-D water flow mathematical model is established to simulate the flood evolution in the flood diversion and detention area with well-shaped canals. Through the calculation of the generalized terrain region, the results show that the flow velocity in well-shaped canals is faster than the other districts; and the flow will travel the dike to the adjacent region while the well-shaped canals are filled with water. The water movement is in line with the law, which shows that the model is feasible not only in theory but also in methods. This method can be used for simulating the flood evolution in flood diversion and detention area with well-shaped canals, which can provide a reference for flood control operation.

关 键 词：分蓄洪区 井字形河渠 洪水演进 数值模拟 

分 类 号：TV131[水利工程—水力学及河流动力学]