Outputs (63)

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling (2016)
Journal Article
Marjoribanks, T., Hardy, R., Lane, S., & Parsons, D. (2017). Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling. Environmental Fluid Mechanics, 17(2), 277-301. https://doi.org/10.1007/s10652-016-9482-z

Vegetation is a characteristic feature of shallow aquatic flows such as rivers, lakes and coastal waters. Flow through and above aquatic vegetation canopies is commonly described using a canopy mixing layer analogy which provides a canonical framewor... Read More about Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling.

Patch-scale representation of vegetation within hydraulic models (2016)
Journal Article
Marjoribanks, T., Hardy, R., Lane, S., & Tancock, M. (2017). Patch-scale representation of vegetation within hydraulic models. Earth Surface Processes and Landforms, 42(5), 699-710. https://doi.org/10.1002/esp.4015

Submerged aquatic vegetation affects flow, sediment and ecological processes within rivers. Quantifying these effects is key to effective river management. Despite a wealth of research into vegetated flows, the detailed flow characteristics around re... Read More about Patch-scale representation of vegetation within hydraulic models.

On the evolution and form of coherent flow structures over a gravel bed: Insights from whole flow field visualization and measurement (2016)
Journal Article
Hardy, R., Best, J., Parsons, D., & Marjoribanks, T. (2016). On the evolution and form of coherent flow structures over a gravel bed: Insights from whole flow field visualization and measurement. Journal of Geophysical Research: Earth Surface, 121(8), 1472-1493. https://doi.org/10.1002/2015jf003753

The microtopography of a gravel bed river has been shown to generate turbulent flow structures that originate from shear flow generated in the near bed region. Although field and laboratory measurements have shown that such flows contain a range of c... Read More about On the evolution and form of coherent flow structures over a gravel bed: Insights from whole flow field visualization and measurement.

The importance of accurately representing submerged vegetation morphology in the numerical prediction of complex river flow (2016)
Journal Article
Boothroyd, R., Hardy, R., Warburton, J., & Marjoribanks, T. (2016). The importance of accurately representing submerged vegetation morphology in the numerical prediction of complex river flow. Earth Surface Processes and Landforms, 41(4), 567-576. https://doi.org/10.1002/esp.3871

This paper reports a novel method for the incorporation of complex plant morphologies into a computational fluid dynamics (CFD) model, allowing the numerical prediction of flows around individual plants. The morphological complexity, which comprises... Read More about The importance of accurately representing submerged vegetation morphology in the numerical prediction of complex river flow.

On validating predictions of plant motion in coupled biomechanical-flow models (2015)
Journal Article
Marjoribanks, T., Hardy, R., & Parsons, D. (2015). On validating predictions of plant motion in coupled biomechanical-flow models. Journal of Hydraulic Research, 53(6), 808-813. https://doi.org/10.1080/00221686.2015.1110627

Recent developments in integrated biomechanical-flow models have enabled the prediction of the influence of vegetation on the flow field and associated feedback processes. However, to date, such models have only been validated on the hydraulic predic... Read More about On validating predictions of plant motion in coupled biomechanical-flow models.

The role of discharge variability in determining alluvial stratigraphy (2015)
Journal Article
Nicholas, A., Sambrook Smith, G., Amsler, M., Ashworth, P., Best, J., Hardy, R., …Szupiany, R. (2016). The role of discharge variability in determining alluvial stratigraphy. Geology, 44(1), 3-6. https://doi.org/10.1130/g37215.1

We illustrate the potential for using physics-based modeling to link alluvial stratigraphy to large river morphology and dynamics. Model simulations, validated using ground penetrating radar data from the Río Paraná, Argentina, demonstrate a strong r... Read More about The role of discharge variability in determining alluvial stratigraphy.

Extremes in dune preservation: Controls on the completeness of fluvial deposits (2015)
Journal Article
Reesink, A., Van den Berg, J., Parsons, D., Amsler, M., Best, J., Hardy, R., …Szupiany, R. (2015). Extremes in dune preservation: Controls on the completeness of fluvial deposits. Earth-Science Reviews, 150, 652-665. https://doi.org/10.1016/j.earscirev.2015.09.008

Understanding sedimentary preservation underpins our ability to interpret the ancient sedimentary record and reconstruct paleoenvironments and paleoclimates. Dune sets are ubiquitous in preserved river deposits and are typically interpreted based on... Read More about Extremes in dune preservation: Controls on the completeness of fluvial deposits.

The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives (2014)
Journal Article
Marjoribanks, T., Hardy, R., & Lane, S. (2014). The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives. Wiley Interdisciplinary Reviews: Water, 1(6), 549-560. https://doi.org/10.1002/wat2.1044

Currently, many of the methods used to predict the effect of vegetation on river flow suffer from one or both of the following problems: (1) a strong dependence on parameters that have a poor physical basis and which are only readily determined using... Read More about The hydraulic description of vegetated river channels: the weaknesses of existing formulations and emerging alternatives.

High-resolution numerical modelling of flow-vegetation interactions (2014)
Journal Article
Marjoribanks, T., Hardy, R., Lane, S., & Parsons, R. (2014). High-resolution numerical modelling of flow-vegetation interactions. Journal of Hydraulic Research, 52(6), 775-793. https://doi.org/10.1080/00221686.2014.948502

In this paper, we present and apply a new three-dimensional model for the prediction of canopy-flow and turbulence dynamics in open-channel flow. The approach uses a dynamic immersed boundary technique that is coupled in a sequentially staggered mann... Read More about High-resolution numerical modelling of flow-vegetation interactions.

Effect of bed permeability and hyporheic flow on turbulent flow over bed forms (2014)
Journal Article
Blois, G., Best, J., Sambrook Smith, G., & Hardy, R. (2014). Effect of bed permeability and hyporheic flow on turbulent flow over bed forms. Geophysical Research Letters, 41(18), 6435-6442. https://doi.org/10.1002/2014gl060906

This paper uses particle imaging velocimetry to provide the first measurements detailing the flow field over a porous bed in the presence of bed forms. The results demonstrate that flow downstream of coarse-grained bed forms on permeable beds is fund... Read More about Effect of bed permeability and hyporheic flow on turbulent flow over bed forms.