滩槽交界带不同植被布置方式对水动力特性影响的数值研究  

Numerical Study on Influence of Different Vegetation Arrangements on Hydrodynamic Characteristics in Junction Zone Between Floodplain and Channel

作　　者：杨帆 任春平[1] 王鸿飞 YANG Fan;REN Chun-ping;WANG Hong-fei(College of Water Resource Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Water Resources Investment Protection Company in Shanxi Province,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024 [2]山西水投防护技术有限公司,山西太原030024

出　　处：《水电能源科学》2024年第10期78-82,共5页Water Resources and Power

基　　金：水利工程安全与仿真国家重点实验室开放基金资助项目(HESS-2006);山西省自然科学基金(202103021224116);山西省回国留学人员科研教研资助项目(2023-67)。

摘　　要：为研究滩槽交界带不同植被布置方式对水动力特性的影响,基于Delft3D-FM构建了考虑二次流影响的二维水动力模型,分析了植被平行布置、交错布置、无植被工况下河道断面速度分布、二次流强度和河底剪切应力。结果表明,与无植被工况相比,植被增加了滩槽间动量交换,布置有植被的河道主槽流速增大,植被区流速减小,植被的存在减小了植被区的二次流强度,增大了主槽的二次流强度和滩槽交界带剪切应力;交错布置植被会明显增大主槽二次流强度。In order to discuss the influence of different vegetation arrangements on the hydrodynamic process in the junction zone between floodplain and main channel,this paper constructs a two-dimensional hydrodynamic model based on Delft3D-FM,which considers the influence of secondary flow.The changes of hydrodynamic characteristics,such as velocity distribution,secondary flow intensity and bed shear stress,are analyzed under the conditions of parallel vegetation arrangement,staggered vegetation arrangement and no vegetation.Comparison with no vegetation conditions,vegetation has increased momentum exchange between floodplain and channel,the flow velocity in the main channel of a river with vegetation increases,while the flow velocity in the vegetation area decreases.The presence of vegetation increases the secondary flow and shear stress in the main channel.The staggered arrangement of vegetation significantly increases the secondary flow in the main channel and the bed shear stress.

关 键 词：滩槽交界带 Delft3D-FM 植被 水动力模型 水动力特性 

分 类 号：TV133[水利工程—水力学及河流动力学]