Investigation of Flow Structures Along the Embankment Generated Nearby Finite Riparian Vegetation
Investigation of Flow Structures Along the Embankment Generated Nearby Finite Riparian Vegetation
复制标题
有限河岸植被附近产生的沿路堤流动结构的研究
DOI：
10.1007/978-981-16-6140-2_5
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
N.
中科院分区：
文献类型：
--
作者：
Wickramasinghe;R.;Tanaka;N.
2019年10月，台风Hagibis在日本崎玉县东溪河造成堤坝决口。在调查中发现，河岸带存在有限的植被斑块，附近有与堤防的缝隙，植被斑块的边缘堆积着草型或木质碎片。鉴于此，进行了包括泥石流截留在内的河岸植被有限的明渠堤防水流水动力物理模型试验。有限植被模型(Vm)包含紧急木质圆柱体。考虑了Vm间隙(即Vm与槽壁之间的间隙)和Vm角度(即Vm与流线的夹角)的几种构型。将椰子纤维垫的碎屑模型(DM)插入到VM的流苏表面，以再现碎屑捕获。Vm构型没有报告流入和角度之间有很强的关系。然而，对于DM，沿侧壁的最大流入出现在60°、90°和120°角。对于碎片捕获情况，对于中间间隙，观测到了两个峰值驻波场。此外，对于较高的间隙，与Vm相比，Dm产生的驻波场向下游移动得更远。此外，波浪干扰加剧，当碎片被困住时，影响沿侧壁的侵蚀。
The typhoon Hagibis in 2019 October has caused a dike breach in the Toki River in Saitama Prefecture, Japan. During the survey, it was found that finite vegetation patches exist in the riparian zone with gaps to the embankment in the vicinity, and grass-type or woody debris has piled up at the edges of the vegetation patches. In view of that, a physical model experiment was carried out to understand the flow hydrodynamics along the open-channel embankment with finite riparian vegetation, including debris trapping. The finite vegetation model (VM) contained emergent wooden circular cylinders. Several configurations of the VM gap (i.e., the gap between VM and flume wall) and VM angle (i.e., angle of VM to streamline) were considered. A debris model (DM) of coconut fiber mat inserted in the fringe faces of the VM to reproduce debris trapping. VM configurations did not report a strong relationship between the afflux and the angle. However, for DM, the maximum afflux along the sidewall occurred for 60°, 90°, and 120° angles. Two peak standing wave fields were observed for intermediate gaps for debris trapping cases. Moreover, for higher gaps, DM generated standing wave field shifts further downstream compared to VM. In addition, wave interference exacerbated, influencing erosion along the side wall when debris was trapped.
桥墩的时间冲刷演化：木屑粗糙度和孔隙度的影响
影响因子：
2.3
作者：
S. Pagliara;I. Carnacina
通讯作者：
I. Carnacina
影响因子：
3.3
作者：
Gurnell, Angela
通讯作者：
Gurnell, Angela