堆积体作用下的河道壅水计算  

Calculation of Backwater Effect Caused by Accumulation Body

作　　者：苏杨中[1] 郭志学[1] 彭清蛾[1] 刘家富[1] 

机构地区：[1]四川大学水力学与山区河流开发保护国家重点实验室,四川成都610065

出　　处：《人民黄河》2012年第8期12-14,共3页Yellow River

基　　金：国家自然科学基金资助项目(50949057)

摘　　要：受汶川地震影响,震区河流沿岸大型堆积体增多,因其束窄了河道过流断面,故易在上游造成壅水。壅水高度与堆积体规模、天然水流运动特性相关。对堆积体的壅水问题进行了水槽试验研究,分析了堆积体上游壅水特性与来水流量、堆积体尺度间的关系,讨论了堆积体最大壅水高度的影响因素。引入了堆积体阻水率概念,研究了最大壅水高度和堆积体阻水率以及弗劳德数之间的关系,通过试验数据拟合建立了计算公式,为主河道受堆积体作用下的壅水高度提供了一种计算方法。Many landslides poured into rivers of the zone caused by Wenchuan earthquake, which reduced the flow cross section and caused the backwater in upstream. Backwater height was related to the accumulation body scale and natural flow characteristics. Based on the flume experi- ment, the relationship of the accumulation body upstream backwater characteristics, water flow and accumulation body size had been analyzext, and the influence factors on maximum backwater height cased by accumulation body were discussed also. Meanwhile, the conception of water block rate of the accumulation body was introduced and the formula calculation of the backwater height by using Froude number and the water block rate was established.

关 键 词：堆积体 阻水率 壅水高度 水槽试验 

分 类 号：TV131.6[水利工程—水力学及河流动力学] TV133