生态浮床布设间距对根区流量分配影响研究  

Study on the Effect of Layout Spacing of Ecological Floating Bed on Root Zone Flow Distribution

作　　者：马超[1] 张付成 MA Chao;ZHANG Fu-cheng(State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学水利工程智能建设与运维全国重点实验室,天津300072

出　　处：《水电能源科学》2025年第3期56-59,127,共5页Water Resources and Power

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07106-004)。

摘　　要：生态浮床是改善城市河道水环境的有效措施,其水体净化能力与通过根区的流量相关。生态浮床布设间距会改变河道流速分布,进而影响到通过浮床根区的流量。为此,基于流量分配原理和以水槽试验和数值模拟相结合的形式,探索了生态浮床布设间距、过流流量对生态浮床根区流量的入流比和出流比的影响。结果表明,有16.3%~20.5%的水流流经上游生态浮床根部区域,该数值只与过流流量呈正相关;受到上游生态浮床的影响,仅有12.5%~20.2%的水流通过下游生态浮床根区,该数值随着布设间距和过流流量增大而增大;当生态浮床布设间距为3倍浮床长度时,进入到上下游生态浮床根区的流量已近似相等。研究结果可用于指导工程实践。Ecological floating bed is an effective measure to improve the water environment of urban river,and its water purification capacity is related to the flow through the root zone.The spacing of the ecological floating bed will change the velocity distribution of the river,and then affect the flow through the root zone of the floating bed.Therefore,based on the principle of flow distribution and the combination of flume test and numerical simulation,the effects of ecological floating bed spacing and overcurrent flow on the inflow ratio and outflow ratio in the root zone of ecological floating bed were explored.The results show that 16.3%-20.5%of the water flows through the root area of the upstream ecological floating bed,and this value is only positively correlated with the overflow;Under the influence of the upstream ecological floating bed,only 12.5%-20.2%of the water flows through the root zone of the downstream ecological floating bed,and this value increases with the increase of layout spacing and overflow.When the spacing of the ecological floating bed is 3 times the length of the floating bed,the flow into the root zone of the upstream and downstream ecological floating bed is approximately equal.The research results can be used to guide engineering practice.

关 键 词：生态浮床 流量分配 布设间距 入流比 出流比 

分 类 号：TV133[水利工程—水力学及河流动力学]