Dr Laurent Amoudry

Marine Physics and Ocean Climate
+44 (0)151 795 4811


I am a senior scientist at the National Oceanography Centre, where I lead the Coastal Ocean Processes team. I am a coastal scientist with broad interests in coastal, estuarine and shelf seas dynamics, in particular in relation to sediment transport, turbulence and mixing, and land-ocean transfer processes. My work primarily involves observational and modelling studies of physical processes, the aim of which is to improve integrated predictive systems for coastal and shelf seas under climate and anthropogenic changes.

Some more detailed topics of interest include:

  • coastal and estuarine hydrodynamics
  • coastal and estuarine sediment transport, suspended particulate dynamics, flocculation, sediment-turbulence interaction
  • bottom boundary layer processes, bedload, sediment resuspension
  • turbulence and mixing in coastal waters
  • multiphase approaches for geophysical sediment transport applications
  • fluxes at the sediment-water interface

Current research projects

BLUEcoast combines the expertise of biologists, coastal engineers, geologists, geographers, and oceanographers with complementary field, laboratory and numerical skills, to understand the processes controlling the dynamics of our coastal systems.

Using case study sites across England we aim to inform shoreline management by reducing uncertainties in the prediction of medium-term (years) and long -term (decadal and longer) regional sediment budgets, morphological change and how the coast recovers after sequences of storm events. As it is not feasible to quantify all the relevant morphodynamic processes at high spatial resolution across the entire UK coast, we focus on a number of different coastal systems representing:

  • Exposed (high energy) sandy coast with rocky headlands (SW England).
  • Partially-exposed (medium-wave energy) sand-shingle coast, with soft rock cliffs and subtidal sediments (E England, Suffolk coast).
  • Mixed sand-mud coasts and estuaries (NW England, Morecambe Bay; & E England, Essex estuaries).

Our aim is to develop an integrated modelling tool that will be used to evaluate coastal resilience and scope alternative management options along managed coastlines with critical Energy infrastructure (SE England, Dungeness foreland & E England, Minsmere nature reserve).

This project is funded by NERC in response to a Highlight Topic call. It is a consortium involving many groups in the UK, and is being led by NOC. I am the overall PI for the project.

  • Land Ocean Carbon Transfer (LOCATE)

  • Salt intrusion: Understanding the Pearl River Estuary by Modelling and field Experiments (SUPREME)

Saltwater intrusion in deltas and estuaries results from the complex interaction between water and salt dynamics, and is affected by climate change and human intervention. In the Pearl River Estuary (PRE) in China, these changes endanger freshwater availability affecting over 40 million people. PRE's complex shape (geometry and bathymetry) makes salt intrusion processes inherently three-dimensional. However, as previous research was mainly restricted to longitudinal variability, current knowledge is insufficient to unravel the interwoven longitudinal and lateral salt transport mechanisms.

The overall aim of the SUPREME project is to understand these three-dimensional salt transport mechanisms, and their sensitivity to variations in external forcing and local geographic shape. The knowledge and tools developed/applied in this project will help assess the effectiveness of possible measures to alleviate undesired changes in salt intrusion.

This project is a collaboration between the NOC, the Delft University of Technology (Dr Henk Shuttelaars), and Sun Yat-sen University (Prof. Wenping Gong). It is co-funded by EPSRC through the Newton Fund in the UK, the Netherlands Organisation for Scientific Research (NWO), and the National Natural Science Foundation of China, NSFC.

Past projects

The aim of the programme is to reduce the uncertainty in our understanding of nutrient and carbon cycling within the shelf seas, and of their overall role in global biogeochemical cycles. The programme will also provide effective policy advice and make a significant contribution to the Living With Environmental Change programme.

I am involved in the benthic and in the modelling work packages.

Biogeochemistry, macronutrient and carbon cycling in the benthic layer: This project is a consortium of leading scientists that includes microbiologists, ecologists, physical oceanographers, biogeochemists, mathematical modellers and policy advisors. With assistance from organisations like CEFAS, Marine Scotland and AFBI, they will carry out a series of research cruises around the UK that will map the sensitivity and status of seabed habitats based on their physical condition, the microbial and faunal communities that inhabit them, and the size and dynamics of the nitrogen and carbon pools found there.

Integrative Modelling for Shelf Seas Biogeochemistry: The overarching scientific goal is to enhance our capacity to assess the controls on biogeochemical cycling and hence to quantify with uncertainties the budgets of carbon, nitrogen, phosphorous and silicon including their response to climate, natural variability and anthropogenic stress. The underpinning strategic goal is to develop a new shelf seas biogeochemical model system, coupled to a state of the art physical model, capable of predicting regional impacts of environmental change from days to decades. We will establish a new common model version for the European Regional Seas Ecosystem Model (ERSEM), drawing from the combined expertise of the partners.

  • Interactions of flow, tidal stream turbines and local sediment bed under combined waves and tidal conditions (INSTRON)

Computational and laboratory modelling studies will be carried out (i) to investigate the fundamental processes controlling the complex flow-TST-sediment interactions and (ii) to improve practical prediction methods that can be used not only by engineers in full-scale TST planning and design but also by regulatory authorities monitoring environmental and ecological consequences of installing TST arrays. The research will take a systematic, multidisciplinary, evidence-based approach involving analysis, physical model experiments and numerical modelling components to address and delineate the key processes affecting the sea bed response to TST placements in coastal waters

The iCOASST project will help forecast what the UK’s coastline will look like in the future, up to 100 years’ time.

This four-year project brings together a number of UK universities, research laboratories and leading consultants, to develop new methods that will characterise and forecast long-term changes to coastal sediment systems. This work is funded by the Natural Environment Research Council (NERC) and is partnered by the Environment Agency (EA), who will use these methods to improve long-term flood and erosion risk management.

I am involved in the process-based modelling component of the project.

  • Multi-dimensional Intra-wave Modelling of coupled Sediment transport and Turbulence

In this project, we will combine existing high-quality experimental data with state-of-the-art modelling approaches in order to assess and improve the current representation of near-bed turbulence and sediment transport over rippled beds in coastal-scale models.


I joined the then Proudman Oceanographic Laboratory in January 2008 as a sediment dynamicist, I was promoted to senior scientist in 2012 and I have been leading the Coastal Ocean Processes subgroup since 2014. Prior to this, I obtained a PhD in Civil and Environmental Engineering from Cornell University (Jan. 2008), working on two-phase modelling of granular sediment for sheet flow and scour. I also obtained a dual Master of Engineering in Mechanical Engineering from Cornell University and Ecole Centrale de Lyon in 2001.


My publications while at NOC (and at POL before) can be found on the NERC Open Research Archive.

Below is earlier work from my PhD at Cornell University:

Amoudry, L.O.; Liu, P. L.-F.. 2009 Two-dimensional, two-phase granular sediment transport model with applications to scouring downstream of an apron. Coastal Engineering, 56 (7). 693-702. 10.1016/j.coastaleng.2009.01.006

Amoudry, L.; Hsu, T.-J.; Liu, P. L.-F.. 2008 Two-phase model for sand transport in sheet flow regime. Journal of Geophysical Research, 113 (C3). C03011. 10.1029/2007JC004179

Amoudry, L.; Hsu, T.-J.; Liu, P. L.-F. 2005 Schmidt number and near‐bed boundary condition effects on a two‐phase dilute sediment transport model, Journal of Geophysical Research, 110 (C9), 10.1029/2004JC002798



Lichtman, Ian D.; Baas, Jaco H.; Amoudry, Laurent; Thorne, Peter D.; Malarkey, Jonathan; Hope, Julie A.; Peakall, Jeffrey; Paterson, David M.; Bass, Sarah J.; Cooke, Richard D.; Manning, Andrew J.; Davies, Alan G.; Parsons, Daniel R.; Ye, Leiping. 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
Ramirez Mendoza, R.; Amoudry, L.O.; Thorne, P.D.; Cooke, R.D.; McLelland, S.; Jordan, L.B.; Simmons, S.; Parsons, D.; Murdoch, L.. 2018 Laboratory study on the effects of hydro kinetic turbines on hydrodynamics and sediment dynamics. Renewable Energy. https://doi.org/10.1016/j.renene.2018.05.094 (In Press)
Li, Xiaorong; Li, Ming; McLelland, Stuart; Jordan, Laura-Beth; Amoudry, Laurent; Ramirez Mendoza, Rafael; Thorne, Peter. 2017 Modelling tidal stream turbines in a three-dimensional wave-current fully coupled oceanographic model. Renewable Energy, 114 (A). 297-307.10.1016/j.renene.2017.02.033
Thompson, C.E.L.; Silburn, B.; Williams, M.E.; Hull, T.; Sivyer, D.; Amoudry, L.O.; Widdicombe, S.; Ingels, J.; Carnovale, G.; McNeill, C.L.; Hale, R.; Laguionie Marchais, C.; Hicks, N.; Smith, H.E.K.; Klar, J.K.; Hiddink, J.G.; Kowalik, J.; Kitidis, V.; Reynolds, S.; Woodward, E.M.S.; Tait, K.; Homoky, W.B.; Kröger, S.; Bolam, S.; Godbold, J.A.; Aldridge, J.; Mayor, D.J.; Benoist, N.M.A.; Bett, B.J.; Morris, K.J.; Parker, E.R.; Ruhl, H.A.; Statham, P.J.; Solan, M.. 2017 An approach for the identification of exemplar sites for scaling up targeted field observations of benthic biogeochemistry in heterogeneous environments. Biogeochemisry, 135 (1-2). 1-34.10.1007/s10533-017-0366-1
Aldridge, J.N.; Lessin, G.; Amoudry, L.O.; Hicks, N.; Hull, T.; Klar, J.K.; Kitidis, V.; McNeill, C.L.; Ingels, J.; Parker, E.R.; Silburn, B.; Silva, T.; Sivyer, D.B.; Smith, H.E.K.; Widdicombe, S.; Woodward, E.M.S.; van der Molen, J.; Garcia, L.; Kroger, S.. 2017 Comparing benthic biogeochemistry at a sandy and a muddy site in the Celtic Sea using a model and observations. Biogeochemistry, 135. 155-182.10.1007/s10533-017-0367-0
Thompson, C.E.L.; Williams, M.E.; Amoudry, L.; Hull, T.; Reynolds, S.; Panton, D.; Fones, G.R.. 2017 Benthic controls of resuspension in UK shelf seas: implications for resuspension frequency. Continental Shelf Research. https://doi.org/10.1016/j.csr.2017.12.005 (In Press)
Amoudry, L.O.; Souza, A.J.; Thorne, P.D.; Liu, P.L.-F.. 2016 Parameterization of intrawave ripple-averaged sediment pickup above steep ripples. Journal of Geophysical Research: Oceans, 121 (1). 658-673.10.1002/2015JC011185
Brown, Jennifer; Norman, Danielle; Amoudry, Laurent; Souza, Alejandro. 2016 Impact of operational model nesting approaches and inherent errors for coastal simulations [in special issue: Coastal ocean modelling] Ocean Modelling, 107. 48-63.10.1016/j.ocemod.2016.10.005
Ramirez Mendoza, Rafael; Souza, Alejandro; Amoudry, Laurent; Plater, Andrew. 2016 Effective energy controls on flocculation under various wave-current regimes. Marine Geology, 382. 136-150.10.1016/j.margeo.2016.10.006
Brown, Jennifer; Amoudry, Laurent; Souza, Alejandro; Rees, Jon. 2015 Fate and pathways of dredged estuarine sediment spoil in response to variable sediment size and baroclinic coastal circulation. Journal of Environmental Management, 149. 209-221.10.1016/j.jenvman.2014.10.017.
Amoudry, Laurent; Ramirez-Mendoza, Rafael; Souza, Alejandro; Brown, Jennifer. 2014 Modelling-based assessment of suspended sediment dynamics in a hypertidal estuarine channel. Ocean Dynamics, 64 (5). 707-722.10.1007/s10236-014-0695-8
Ramirez-Mendoza, Rafael; Souza, Alejandro; Amoudry, Laurent. 2014 Modeling flocculation in a hypertidal estuary. Ocean Dynamics, 64 (2). 301-313.10.1007/s10236-013-0675-4
Brown, Jennifer; Amoudry, Laurent; Francois , Merciera; Souza, Alejandro. 2013 Intercomparison of the Charnock and COARE bulk wind stress formulations for coastal ocean modelling. Ocean Science, 9. 721-729.10.5194/os-9-721-2013
Brown, J.M.; Amoudry, L.O.; Mercier, F.M.; Souza, A.J. 2013 Intercomparison of the Charnock and CORE bulk wind stress formulations for coastal ocean modelling. Ocean Science, 9 (4). 721-729.10.5194/os-9-721-2013
Bolanos-Sanchez, Rodolfo; Brown, Jennifer M.; Amoudry, Laurent O.; Souza, Alejandro J.. 2013 Tidal, Riverine, and Wind Influences on the Circulation of a Macrotidal Estuary. Journal of Physical Oceanography, 43 (1). 29-50.10.1175/JPO-D-11-0156.1
Amoudry, Laurent; Bell, Paul; Thorne, Peter; Souza, Alejandro. 2013 Toward representing wave-induced sediment suspension over sand ripples in RANS models. Journal of Geophysical Research: Oceans, 118 (5). 2378-2392.10.1002/jgrc.20188
Amoudry, Laurent O.. 2012 Assessing sediment stress closures in two-phase sheet flow models. Advances in Water Resources, 48. 92-101.10.1016/j.advwatres.2012.03.011
Bolanos, Rodolfo; Amoudry, Laurent O.; Doyle, Ken. 2011 Effects of instrumented bottom tripods on process measurements. Journal of Atmospheric and Oceanic Technology, 28 (6). 827-837.10.1175/2010JTECHO816.1
Bolanos, Rodolfo; Amoudry, Laurent O.; Doyle, Ken. 2011 Effects of instrumented bottom tripods on process measurements (vol 28, p. 827, 2011, Corrigendum). Journal of Atmospheric and Oceanic Technology, 28 (10). p1361.10.1175/JTECH-D-11-00125.1
Amoudry, Laurent O.; Souza, Alejandro J.. 2011 Impact of sediment-induced stratification and turbulence closures on sediment transport and morphological modelling. Continental Shelf Research, 31 (9). 912-928.10.1016/j.csr.2011.02.014
Amoudry, Laurent O.; Souza, Alejandro J.. 2011 Deterministic coastal morphological and sediment transport modeling: a review and discussion. Reviews of Geophysics, 49. RG2002.10.1029/2010RG000341
Souza, Alejandro J.; Bell, Paul S.; Amoudry, Laurent. 2010 Working toward a common strategy for U.K. sediment transport research. EOS: Transactions American Geophysical Union, 91 (5). 45-46.10.1029/2010EO050007
Amoudry, Laurent O; Liu, Philip L.-F. 2010 Parameterization of near-bed processes under collinear wave and current flows from a two-phase sheet flow model. Continental Shelf Research, 30 (13). 1403-1416.10.1016/j.csr.2010.04.009
Amoudry, L.; Hsu, T.-J.; Liu, P. L.-F.. 2008 Two-phase model for sand transport in sheet flow regime. Journal of Geophysical Research, 113 (C3). C03011.10.1029/2007JC004179

Book section

Ramirez Mendoza, Rafael; Amoudry, Laurent; Thorne, Peter; Cooke, Richard; Simmons, Stephen; McLelland, Stuart; Murphy, Brendan; Parsons, Daniel; Jordan, Laura-Beth; Vybulkova, Lada. 2015 Impact of scaled tidal stream turbine over mobile sediment beds. In:Proceedings of the 11th European Wave and Tidal Energy Conference, EWTEC2015. Nantes, France, Technical Committee of the European Wave and Tidal Energy Conference, 6p.
Brown, J.M.; Amoudry, L.O.; Souza, A.J.; Plater, A.J.. 2015 Residual circulation modelling at the national UK scale to identify possible sediment pathways to inform decadal coastal geomorphic evolution models. In: Wang, P.; Rosati, J.D.; Cheng, J., (eds.)Coastal Sediments 2015: The Proceedings of the Coastal Sediments 2015. Singapore, World Scientific, 12pp.
Brown, J.M.; Amoudry, L.O.; Souza, A.J.; Plater, A.J.. 2015 Residual circulation modelled at national UK scale to identify sediment pathways to inform coastal evolution models. In: Wang, P.; Rosati, J.D.; Cheng, J., (eds.)The Proceedings of the Coastal Sediments 2015. Singapore, World Scientific, 14p.
Nicholls, R.J.; French, J.; Burninham, H.; van Maannen, B.; Payo, A.; Sutherland, J.; Walkden, M.; Thornhill, G.; Brown, J.; Luxford, F.; Simm, J.; Reeve, D.E.; Hall, J.M.; Souza, A.; Stansby, P.K.; Amoudry, L.O.; Rogers, B.D.; Ellis, M.; Whitehouse, R.; Horrillo-Carballo, J.; Karunarathna, H.U.; Pan, S.; Plater, A.; Dix, J.; Barnes, J.; Heron, E.. 2015 Improving decadal coastal geomorphic predictions: An overview of the iCOASST project. In: Wang, P.; Rosati, J.D.; Cheng, J., (eds.)The Proceedings of the Coastal Sediments 2015. Singapore, World Scientific, 16p.
Amoudry, L.O.; Bell, P.; Souza, A.J.; Thorne, P.D.. 2011 Intrawave modeling of turbulent flow and sediment transport over rippled beds. In: Wang, P.; Rosati, J.D.; Roberts, T.M., (eds.)The Proceedings of the Coastal Sediments 2011. Singapore, World Scientific, 1048-1059, 2768pp.
Amoudry, Laurent, O.; Souza, Alejandro, J.; Holt, Jason, T.. 2009 Sediment transport module for a B-grid coastal shelf ocean model. In: Mizuguchi, Masara; Sato, Shinji, (eds.)Proceedings of Coastal Dynamics 2009, 6th International Conference on Coastal Dynamics. Japan, World Scientific, Paper 88, 10pp.
Liu, P.L-F.; Amoudry, L.O.. 2007 Recent progress on understanding and modeling sediment transport in coastal environment. In: Zhuang, F.G.; Li, J.C., (eds.)New Trends in Fluid Mechanics Research, Proceedings of the Fifth International Conference on Fluid Mechanics, (Shanghai, 2007). Beijing, Tsinghua University Press, 23-28.


Balfour, C.; Williams, M.; Cooke, R.; Amoudry, L.; Souza, A.. 2015 NOC Liverpool report for the miniSTABLE benthic lander deployments as part of the UK-SSB research programme. Southampton, National Oceanography Centre, 71pp. (National Oceanography Centre Research and Consultancy Report, 53)
Norman, D.L.; Brown, J.M.; Amoudry, L.O.; Souza, A.J.. 2014 Investigation of the Liverpool Bay mixing front using POLCOMS. Southampton, National Oceanography Centre, 38pp. (National Oceanography Centre Internal Document, No. 11)
Norman, D.L.; Brown, J.M.; Amoudry, L.O.; Souza, A.J.. 2014 Processes controlling stratification in Liverpool Bay. Southampton, National Oceanography Centre, 18pp. (National Oceanography Centre Internal Document, No. 10)
Norman, D.L.; Brown, J.M.; Amoudry, L.O.; Souza, A.J.. 2014 Was 2008 a typical year in Liverpool Bay? Southampton, National Oceanography Centre, 19pp. (National Oceanography Centre Internal Document, No. 09)
Norman, D.L.; Brown, J.M.; Amoudry, L.O.; Souza, A.J.. 2014 POLCOMS sensitivity analysis to river temperature proxies, surface salinity flux and river salinity in the Irish Sea. Southampton, National Oceanography Centre, 22pp. (National Oceanography Centre Internal Document, No. 08)
Brown, J.M.; Amoudry, L.O.; Souza, A.J.; Rees, J.. 2013 Particle tracking study in the Mersey Estuary. Southampton, National Oceanography Centre, 34pp. (National Oceanography Centre Research and Consultancy Report, 40)
Amoudry, Laurent. 2008 A review on coastal sediment transport modelling. Liverpool, Proudman Oceanographic Laboratory. (POL Internal Document No.189)

Conference item

Amoudry, Laurent. 2012 Modelling hydrodynamics and sediment transport in the coastal zone: key physical processes. [Other] In: Environmental Fluid Mechanics and Hydrology Seminars, Cornell University, 19 April 2012. (Unpublished)
Amoudry, Laurent. 2012 Modelling suspended sediment transport in shelf seas: the role of turbulence. [Speech] In: Liverpool Marine Symposium, Liverpool, UK, 26-27 January 2012. (Unpublished)
Amoudry, Laurent; Bolanos-Sanchez, Rodolfo; Brown, Jennifer; Souza, Alejandro. 2012 Modelling sediment transport in a macrotidal, funnel-shaped, bi-channel estuary: the Dee estuary. [Speech] In: 33rd International Conference on Coastal Engineering (ICCE), Santander, Spain, 01-06 Jul 2012. (Unpublished)
Amoudry, Laurent .O.; Liu, Philip,; Souza, Alejandro. J.; Thorne, Peter. D.. 2010 Upscaling of sediment erosion parameterization from small-scale, intra-wave models to regional ocean models. [Poster] In: Ocean Sciences 2010. (Unpublished)
Amoudry, Laurent; Souza, Alejandro. 2010 Influence of turbulence closure on estuarine sediment dynamics and morphodynamics. In: 32nd International Conference on Coastal Engineering, Shanghai, China, 30 June 2010 - 5 July 2010. CERC.
Amoudry, Laurent O; Souza, Alejandro J; Holt, Jason T. 2009 Sediment transport module for a B-grid coastal ocean model. In: Proceedings of Coastal Dynamics 2009: impacts of human activities on dynamic coastal processes, Tokyo. World Scientific.
Amoudry, Laurent O.; Souza, Alejandro J.. 2009 Sediment transport modelling in the POLCOMS. [Poster] In: UK Sediment Initiative 2009, Liverpool, 27-29 April 2009. Liverpool, Proudman Oceanogrpahic Laboratory.