Bed shear stress and near-bed flow through sparse arrays of rigid emergent vegetation

Aliaga, José; Aliaga, José; Aberle, Jochen

doi:10.24355/dbbs.084-202311161438-0

Research Data Thu Mar 28 2024 CC BY 4.0

Published

Bed shear stress and near-bed flow through sparse arrays of rigid emergent vegetation

This data set provides the hydraulic boundary conditions, bed shear stress measurements, and near-bed flow field velocity measurements collected in flume experiments presented in the article "Bed Shear Stress and Near-bed Flow through Sparse Arrays of Rigid Emergent Vegetation" (Aliaga & Aberle, 2024).

This research explores bed shear stress and near-bed flow characteristics in sparse arrays of rigid emergent cylinders mimicking vegetation. For this purpose, a novel adaptation of a shear plate was used to directly measure the bed shear stress acting at the canopy scale. These bed shear stress measurements were analyzed in relation to spatially averaged near-bed flow quantities for different array densities.

Category

Creator:

Aliaga, José

Is referenced by:

Bed shear stress and near-bed flow through sparse arrays of rigid emergent vegetation [Article / Chapter]. 10.1029/2023WR035879

References:

A toolbox for Laser Doppler Velocimetry data post-processing

References:

Drag force measurements of vegetation elements [Article / Chapter]. https://hdl.handle.net/20.500.11970/110005

References:

A novel shear plate for direct measurements of bottom shear stress induced by a model ship propeller [Article / Chapter]. https://doi.org/10.25171/InstGeoph_PAS_Publs-2021-016

Date Created:

01.11.2021 - 31.01.2022

Date Issued:

28.03.2024

DOI:

10.24355/dbbs.084-202311161438-0

Language:

English

Type of Resource:

Text

Keywords:

Bed shear stress

Typ

Schlagwort
Vegetation

Typ

Schlagwort
Shear plate

Typ

Schlagwort

DDC:

551 Geologie, Hydrologie, Meteorologie

Hosting institution:

03 - Architecture, Civil Engineering and Environmental Sciences

Type:: Table CSV files with Hydraulic, Force and Velocity measurements data of laboratory experiments
Research Object:: Physical Object Hydraulic data of laboratory experiment in flows with sparse arrays of rigid emergent vegetation
Data Origin:: Experiment and Measurements Experiments were carried out in a 32-m long, 0.4-m deep, and 0.6-m wide tilting flume at the Leichtweiß-Institute for Hydraulic Engineering, Technische Universität Braunschweig, Germany
Methods/Processes:: Flow discharge Q, supplied by the laboratory water circuit, was measured in the supply pipe through an inductive flow meter. Water surface elevation was measured through a system of 12 piezometers installed at the flume bottom through communicating pipes. A movable ultrasonic sensor measured the water elevation in each communicating pipe. Bed shear stress was directly estimated through a shear plate by measuring the streamwise hydrodynamic forces acting on the bed. Cylinders were mounted onto the shear plate, allowing for the measurement of the combined effects of the drag forces acting on the cylinders attached to the shear plate and the bed shear stress acting on the surface of the plate. Velocity measurements were measured with a Dantec 3D Laser Doppler Anemometer (LDA).
Research Instruments:: Shear Plate 3D Laser Doppler Anemometer (LDA)
Description of Data Processing:: Bed shear stress was estimated by subtracting the drag forces acting on the cylinders attached to the shear plate from the drag force measured by the shear plate and dividing this difference by the shear plate area Temporal post-processing of the velocity series was carried out using the LDA Toolbox of Aleixo et al. (2016). Spatially averaged quantities were calculated by averaging all temporally post-processed samples for each plane parallel to the bed.