淹没与非淹没植被作用下复式河槽流速最大值分布  

Flooded and non-flooded compound channel flow velocity distribution of the maximum effect of vegetation

作　　者：贾澄澄 刘超[2] 刘兴年[2] 

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]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：《吉林水利》2014年第3期20-24,共5页Jilin Water Resources

基　　金：国家科技支撑计划资助项目(2012BAB05B02);国家自然科学基金资助项目(50709021)

摘　　要：本文收集了不同系列的淹没与非淹没植被作用下复式河槽的流速资料并对复式河槽中流速最大值的横向分布进行了探讨。结果发现滩地流速最大值基本保持在水面附近而主槽中的流速最大值都在水面以下;当滩地种有非淹没植被时;主槽中的流速最大值分布与无植被时几乎一致,滩地流速最大值在植被密度较小时仍在水面,但当植被密度较大时,最大值会向床面靠近;当滩地种植淹没植被时,流速最大值的位置会随着植被淹没度的增加而逐渐上升,最终保持在水面附近。This paper collected different series of compound channel flow rate data and compound channels in the maximum lateral velocity distribution under flooded and non-flooded vegetation and discussed.The results showed that the maximum flow rate of beach remained near the water surface and the maximum flow rate in the main channel are below the water surface;When planted with non-inundated floodplain vegetation;almost unanimously when the maximum flow rate of the main channel of distribution and no vegetation ,beaches flow rate when the maximum is still small vegetation density of the water ,but the vegetation density is large ,the maximum will be closer to the bed;drowned when planting beach vegetation ,location of the maximum flow rate increases with the degree of submerged vegetation gradually rise eventually remain near the surface.

关 键 词：复式河槽 滩地植被 流速最大值分布 水槽试验 

分 类 号：TV133[水利工程—水力学及河流动力学]