All Outputs (15)

On the causes of pulsing in continuous turbidity currents (2018)
Journal Article
Kostaschuk, R., Nasr-Azadani, M. M., Meiburg, E., Wei, T., Chen, Z., Negretti, M. E., Best, J., Peakall, J., & Parsons, D. R. (2018). On the causes of pulsing in continuous turbidity currents. Journal of Geophysical Research: Earth Surface, 123(11), 2827-2843. https://doi.org/10.1029/2018JF004719

Velocity pulsing has previously been observed in continuous turbidity currents in lakes and reservoirs, even though the input flow is steady. Several different mechanisms have been ascribed to the generation of these fluctuations, including Rayleigh‐... Read More about On the causes of pulsing in continuous turbidity currents.

Wave ripple development on mixed clay-sand substrates: Effects of clay winnowing and armoring (2018)
Journal Article
Wu, X., Baas, J. H., Parsons, D. R., Eggenhuisen, J., Amoudry, L., Cartigny, M., McLelland, S., Mouazé, D., & Ruessink, G. (2018). Wave ripple development on mixed clay-sand substrates: Effects of clay winnowing and armoring. Journal of Geophysical Research: Earth Surface, 123(11), 2784-2801. https://doi.org/10.1029/2018JF004681

Based on bed form experiments in a large‐scale flume, we demonstrate that the rate of development of wave ripples on a mixed sand‐clay bed under regular waves is significantly lower than on a pure‐sand bed, even at clay fractions as low as 4.2%, and... Read More about Wave ripple development on mixed clay-sand substrates: Effects of clay winnowing and armoring.

Powerful turbidity currents driven by dense basal layers (2018)
Journal Article
Paull, C. K., Talling, P. J., Maier, K. L., Parsons, D., Xu, J., Caress, D. W., Gwiazda, R., Lundsten, E. M., Anderson, K., Barry, J. P., Chaffey, M., O’Reilly, T., Rosenberger, K. J., Gales, J. A., Kieft, B., McGann, M., Simmons, S. M., McCann, M., Sumner, E. J., Clare, M. A., & Cartigny, M. J. (2018). Powerful turbidity currents driven by dense basal layers. Nature communications, 9(1), Article 4114. https://doi.org/10.1038/s41467-018-06254-6

Seafloor sediment flows (turbidity currents) are among the volumetrically most important yet least documented sediment transport processes on Earth. A scarcity of direct observations means that basic characteristics, such as whether flows are entirel... Read More about Powerful turbidity currents driven by dense basal layers.

Controls on mud distribution and architecture along the fluvial-to-marine transition (2018)
Journal Article
van de Lageweg, W. I., Braat, L., Parsons, D. R., & Kleinhans, M. G. (2018). Controls on mud distribution and architecture along the fluvial-to-marine transition. Geology, 46(11), 971-974. https://doi.org/10.1130/G45504.1

© 2018 Geological Society of America. The interaction of marine (tides and waves) and fluvial processes determines the sedimentary fill of coastal systems in the fluvial-tomarine (FTM) transition zone. Despite frequent recognition of tidal and wave i... Read More about Controls on mud distribution and architecture along the fluvial-to-marine transition.

The adaptation of dunes to changes in river flow (2018)
Journal Article
Reesink, A. J. H., Parsons, D. R., Ashworth, P. J., Best, J. L., Hardy, R. J., Murphy, B. J., McLelland, S. J., & Unsworth, C. (2018). The adaptation of dunes to changes in river flow. Earth-Science Reviews, 185, 1065-1087. https://doi.org/10.1016/j.earscirev.2018.09.002

The dunes that cover the beds of most alluvial channels change in size and shape over time and in space, which in turn affects the flow and sediment-transport dynamics of the river. However, both the precise mechanisms of such adaptation of dunes, an... Read More about The adaptation of dunes to changes in river flow.

Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents (2018)
Journal Article
Smith, G. M., Williams, R., Rowley, P., & Parsons, D. R. (2018). Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents. Bulletin of volcanology, 80(8), Article 67. https://doi.org/10.1007/s00445-018-1241-1

The high mobility of dense pyroclastic density currents (PDCs) is commonly attributed to high gas pore pressures. However, the influence of spatial and temporal variations in pore pressure within PDCs has yet to be investigated. Theory suggests that... Read More about Investigation of variable aeration of monodisperse mixtures: implications for pyroclastic density currents.

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., Prokocki, E., & 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., Song, Q., & 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., Simmons, S., Parsons, D., & 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.

Bedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport predictions (2018)
Journal Article
Lichtman, I. D., Baas, J. H., Amoudry, L. O., Thorne, P. D., Malarkey, J., Hope, J. A., Peakall, J., Paterson, D. M., Bass, S. J., Cooke, R. D., Manning, A. J., Davies, A. G., Parsons, D. R., & Ye, L. (2018). Bedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport predictions. Geomorphology, 315, 17-32. https://doi.org/10.1016/j.geomorph.2018.04.016

Many coastal and estuarine environments are dominated by mixtures of non-cohesive sand and cohesive mud. The migration rate of bedforms, such as ripples and dunes, in these environments is important in determining bed material transport rates to info... Read More about Bedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport predictions.

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., Hubbard, S. M., Talling, P. J., Gwyn Lintern, D., Stacey, C. D., Englert, R. G., Vardy, M. E., Hunt, J. E., Yokokawa, M., Parsons, D. R., Hizzett, J. L., Azpiroz-Zabala, M., & 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., Henry, P.-Y., Rice, S. P., Thom, M., & 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.

Wake hydrodynamics downstream from a horizontal axis turbine under current flow and waves (2018)
Thesis
Jordan, L.-B. (2018). Wake hydrodynamics downstream from a horizontal axis turbine under current flow and waves. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4220800

Due to concerns over the potential impacts of climate change on the environment, there is a growing interest in developing renewable forms of energy. Tidal streams are a potential source of renewable energy that can be harnessed for electricity gener... Read More about Wake hydrodynamics downstream from a horizontal axis turbine under current flow and waves.