All Outputs (90)

Hydrodynamic modelling of tidal-fluvial flows in a large river estuary (2018)
Journal Article
Sandbach, S., Nicholas, A., Ashworth, P., Best, J., Keevil, C., Parsons, D., …Simpson, C. (2018). Hydrodynamic modelling of tidal-fluvial flows in a large river estuary. Estuarine, coastal and shelf science, 212, 176-188. https://doi.org/10.1016/j.ecss.2018.06.023

© 2018 The Authors The transition between riverine and estuarine environments is characterised by a change from unidirectional to bidirectional flows, in a region referred to herein as the Tidally-Influenced Fluvial Zone (TIFZ). In order to improve o... Read More about Hydrodynamic modelling of tidal-fluvial flows in a large river estuary.

Modelling impacts of tidal stream turbines on surface waves (2018)
Journal Article
Li, X., Li, M., Jordan, L. B., McLelland, S., Parsons, D. R., Amoudry, L. O., …Comerford, L. (2019). Modelling impacts of tidal stream turbines on surface waves. Renewable energy, 130, 725-734. https://doi.org/10.1016/j.renene.2018.05.098

© 2018 Elsevier Ltd A high resolution Computational Flow Dynamics (CFD) numerical model is built based on a laboratory experiment in this research to study impacts of tidal turbines on surface wave dynamics. A reduction of ∼3% in wave height is obser... Read More about Modelling impacts of tidal stream turbines on surface waves.

Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics (2018)
Journal Article
Ramírez-Mendoza, R., Amoudry, L., Thorne, P., Cooke, R., McLelland, S., Jordan, L., …Murdoch, L. (2018). Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics. Renewable energy, 129(Part A), 271-284. https://doi.org/10.1016/j.renene.2018.05.094

© 2018 The Authors The need for hydrokinetic turbine wake characterisation and their environmental impact has led to a number of studies. However, a small number of them have taken into account mobile sediment bed effects. The aim of the present work... Read More about Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics.

How to recognize crescentic bedforms formed by supercritical turbidity currents in the geologic record: Insights from active submarine channels (2018)
Journal Article
Hage, S., Cartigny, M. J., Clare, M. A., Sumner, E. J., Vendettuoli, D., Clarke, J. E., …Vellinga, A. J. (2018). How to recognize crescentic bedforms formed by supercritical turbidity currents in the geologic record: Insights from active submarine channels. Geology, 46(6), 563-566. https://doi.org/10.1130/G40095.1

© 2018 Geological Society of America. Submarine channels have been important throughout geologic time for feeding globally significant volumes of sediment f rom land to the deep sea. Modern observations show that submarine channels can be sculpted by... Read More about How to recognize crescentic bedforms formed by supercritical turbidity currents in the geologic record: Insights from active submarine channels.

Beyond equilibrium: Re-evaluating physical modelling of fluvial systems to represent climate changes (2018)
Journal Article
Baynes, E. R., van de Lageweg, W. I., McLelland, S. J., Parsons, D. R., Aberle, J., Dijkstra, J., …Moulin, F. (2018). Beyond equilibrium: Re-evaluating physical modelling of fluvial systems to represent climate changes. Earth-Science Reviews, 181, 82-97. https://doi.org/10.1016/j.earscirev.2018.04.007

© 2018 Elsevier B.V. The interactions between water, sediment and biology in fluvial systems are complex and driven by multiple forcing mechanisms across a range of spatial and temporal scales. In a changing climate, some meteorological drivers are e... Read More about Beyond equilibrium: Re-evaluating physical modelling of fluvial systems to represent climate changes.

Quantifying biostabilisation effects of biofilm-secreted and extracted extracellular polymeric substances (EPSs) on sandy substrate (2018)
Journal Article
Van De Lageweg, W. I., McLelland, S. J., & Parsons, D. R. (2018). Quantifying biostabilisation effects of biofilm-secreted and extracted extracellular polymeric substances (EPSs) on sandy substrate. Earth surface dynamics ESURF ; an interactive open access journal of the European Geosciences Union, 6(1), 203-215. https://doi.org/10.5194/esurf-6-203-2018

© Author(s) 2018. Microbial assemblages ( < q > biofilms < /q > ) preferentially develop at water-sediment interfaces and are known to have a considerable influence on sediment stability and erodibility. There is potential for significant impacts on... Read More about Quantifying biostabilisation effects of biofilm-secreted and extracted extracellular polymeric substances (EPSs) on sandy substrate.

Low-angle dunes in the Changjiang (Yangtze) Estuary: Flow and sediment dynamics under tidal influence (2018)
Journal Article
Hackney, C. R., Hu, H., Wei, T., Yang, Z., Hackney, C., & Parsons, D. R. (2018). Low-angle dunes in the Changjiang (Yangtze) Estuary: Flow and sediment dynamics under tidal influence. Estuarine, coastal and shelf science, 205, 110-122. https://doi.org/10.1016/j.ecss.2018.03.009

It has long been highlighted that important feedbacks exist between river bed morphology, sediment transport and the turbulent flow field and that these feedbacks change in response to forcing mechanisms. However, our current understanding of bedform... Read More about Low-angle dunes in the Changjiang (Yangtze) Estuary: Flow and sediment dynamics under tidal influence.

A General Model for the Helical Structure of Geophysical Flows in Channel Bends (2017)
Journal Article
Azpiroz-Zabala, M., Cartigny, M. J. B., Sumner, E. J., Clare, M. A., Talling, P. J., Parsons, D. R., & Cooper, C. (2017). A General Model for the Helical Structure of Geophysical Flows in Channel Bends. Geophysical research letters, 44(23), 11932-11941. https://doi.org/10.1002/2017gl075721

Meandering channels formed by geophysical flows (e.g., rivers and seafloor turbidity currents) include the most extensive sediment transport systems on Earth. Previous measurements from rivers show how helical flow at meander bends plays a key role i... Read More about A General Model for the Helical Structure of Geophysical Flows in Channel Bends.

Newly recognized turbidity current structure can explain prolonged flushing of submarine canyons (2017)
Journal Article
Azpiroz-Zabala, M., Cartigny, M. J. B., Talling, P. J., Parsons, D. R., Sumner, E. J., Clare, M. A., …Pope, E. L. (2017). Newly recognized turbidity current structure can explain prolonged flushing of submarine canyons. Science Advances, 3(10), Article e1700200. https://doi.org/10.1126/sciadv.1700200

Seabed-hugging flows called turbidity currents are the volumetrically most important process transporting sediment across our planet and form its largest sediment accumulations. We seek to understand the internal structure and behavior of turbidity c... Read More about Newly recognized turbidity current structure can explain prolonged flushing of submarine canyons.

The influence of flow discharge variations on the morphodynamics of a diffluence-confluence unit on a large river: Impacts of discharge variation on a diffluence-confluence unit (2017)
Journal Article
Hackney, C. R., Darby, S. E., Parsons, D. R., Leyland, J., Aalto, R., Nicholas, A. P., & Best, J. L. (2018). The influence of flow discharge variations on the morphodynamics of a diffluence-confluence unit on a large river: Impacts of discharge variation on a diffluence-confluence unit. Earth surface processes and landforms : the journal of the British Geomorphological Research Group, 43(2), 349-362. https://doi.org/10.1002/esp.4204

© 2017 The Authors. Earth Surface Processes and Landforms published by John Wiley & Sons Ltd. Bifurcations are key geomorphological nodes in anabranching and braided fluvial channels, controlling local bed morphology, the routing of sediment and wa... Read More about The influence of flow discharge variations on the morphodynamics of a diffluence-confluence unit on a large river: Impacts of discharge variation on a diffluence-confluence unit.

Sustainable rice cultivation in the deep flooded zones of the Vietnamese Mekong Delta (2017)
Journal Article
Chapman, A., Darby, S., Tompkins, E., Hackney, C., Leyland, J., Van, P. D. T., …Nicholas, A. (2017). Sustainable rice cultivation in the deep flooded zones of the Vietnamese Mekong Delta. Vietnam Journal of Science, Technology and Engineering, 59(2), 34-38. https://doi.org/10.31276/VJSTE.59%282%29.34

This paper explains how the management of the full-dyke system in the deep flooded zones of the Vietnamese Mekong Delta affects rice cultivation, and outlines how alternative dyke management strategies could offer more sustainable adaptations in the... Read More about Sustainable rice cultivation in the deep flooded zones of the Vietnamese Mekong Delta.

An evaluation of the use of a multibeam echo-sounder for observations of suspended sediment (2017)
Journal Article
Simmons, S. M., Parsons, D. R., Best, J. L., Oberg, K. A., Czuba, J. A., & Keevil, G. M. (2017). An evaluation of the use of a multibeam echo-sounder for observations of suspended sediment. Applied acoustics. Acoustique appliqué. Angewandte Akustik, 126, 81-90. https://doi.org/10.1016/j.apacoust.2017.05.004

The theory relating the acoustic backscatter from suspended sediments to the mass concentration of particles has been developed over several decades and is now routinely applied to provide measurements for commercial and scientific applications. Sing... Read More about An evaluation of the use of a multibeam echo-sounder for observations of suspended sediment.

An investigation of the wake recovery of two model horizontal-axis tidal stream turbines measured in a laboratory flume with Particle Image Velocimetry (2017)
Journal Article
Simmons, S. M., McLelland, S. J., Parsons, D. R., Jordan, L., Murphy, B. J., & Murdoch, L. (2018). An investigation of the wake recovery of two model horizontal-axis tidal stream turbines measured in a laboratory flume with Particle Image Velocimetry. Journal of Hydro-environment Research, 19, 179-188. https://doi.org/10.1016/j.jher.2017.03.003

© 2017 International Association for Hydro-environment Engineering and Research, Asia Pacific Division. The uptake of tidal stream-turbine (TST) technology lags other renewable energy sources despite the advantages of predictability, stability and in... Read More about An investigation of the wake recovery of two model horizontal-axis tidal stream turbines measured in a laboratory flume with Particle Image Velocimetry.

Three-dimensional flow structure and bed morphology in large elongate meander loops with different outer bank roughness characteristics (2016)
Journal Article
Konsoer, K. M., Rhoads, B. L., Best, J. L., Langendoen, E. J., Abad, J. D., Parsons, D. R., & García, M. H. (2016). Three-dimensional flow structure and bed morphology in large elongate meander loops with different outer bank roughness characteristics. Water Resources Research, 52(12), 9621-9641. https://doi.org/10.1002/2016wr019040

© 2016. American Geophysical Union. All Rights Reserved. Few studies have examined the three-dimensional flow structure and bed morphology within elongate loops of large meandering channels. The present study focuses on the spatial patterns of three-... Read More about Three-dimensional flow structure and bed morphology in large elongate meander loops with different outer bank roughness characteristics.

Extreme flood-driven fluvial bank erosion and sediment loads: direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques: Direct measurement of flood-driven erosion using MLS and MBES (2016)
Journal Article
Leyland, J., Hackney, C. R., Darby, S. E., Parsons, D. R., Best, J. L., Nicholas, A. P., …Lague, D. (2017). Extreme flood-driven fluvial bank erosion and sediment loads: direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques: Direct measurement of flood-driven erosion using MLS and MBES. Earth surface processes and landforms : the journal of the British Geomorphological Research Group, 42(2), 334-346. https://doi.org/10.1002/esp.4078

Copyright © 2016 John Wiley & Sons, Ltd. This methods paper details the first attempt at monitoring bank erosion, flow and suspended sediment at a site during flooding on the Mekong River induced by the passage of tropical cyclones. We deployed int... Read More about Extreme flood-driven fluvial bank erosion and sediment loads: direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques: Direct measurement of flood-driven erosion using MLS and MBES.

Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling (2016)
Journal Article
Marjoribanks, T. I., Hardy, R. J., Lane, S. N., & Parsons, D. R. (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

© 2016, The Author(s). 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 provid... Read More about Does the canopy mixing layer model apply to highly flexible aquatic vegetation? Insights from numerical modelling.

Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity (2016)
Journal Article
Darby, S. E., Hackney, C. R., Leyland, J., Kummu, M., Lauri, H., Parsons, D. R., …Aalto, R. E. (2016). Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity. Nature, 539(7628), 276-279. https://doi.org/10.1038/nature19809

© 2016 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. The world's rivers deliver 19 billion tonnes of sediment to the coastal zone annually, with a considerable fraction being sequestered in large deltas, home to over 500... Read More about Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity.

Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones (2016)
Journal Article
Dorrell, R., Peakall, J., Sumner, E. J., Parsons, D. R., Darby, S. E., Wynn, R. B., …Tezcan, D. (2016). Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones. Marine Geology, 381, 181-193. https://doi.org/10.1016/j.margeo.2016.09.009

© 2016 The Authors A detailed field investigation of a saline gravity current in the southwest Black Sea has enabled the first complete analysis of three-dimensional flow structure and dynamics of a series of linked hydraulic jumps in stratified, den... Read More about Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones.

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. J., Best, J. L., Parsons, D. R., & Marjoribanks, T. I. (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

©2016. The Authors. 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... 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 role of biophysical cohesion on subaqueous bed form size: COHESION IN SUBAQUEOUS BED FORMS (2016)
Journal Article
Parsons, D. R., Schindler, R. J., Hope, J. A., Malarkey, J., Baas, J. H., Peakall, J., …Thorne, P. D. (2016). The role of biophysical cohesion on subaqueous bed form size: COHESION IN SUBAQUEOUS BED FORMS. Geophysical research letters, 43(4), 1566-1573. https://doi.org/10.1002/2016gl067667

Biologically active, fine-grained sediment forms abundant sedimentary deposits on Earth's surface, and mixed mud-sand dominates many coasts, deltas, and estuaries. Our predictions of sediment transport and bed roughness in these environments presentl... Read More about The role of biophysical cohesion on subaqueous bed form size: COHESION IN SUBAQUEOUS BED FORMS.