Dr Laurent Amoudry
I am a senior scientist at the National Oceanography Centre, where I lead the Coastal Ocean Processes team (8 permanent scientists, 4 PDRAs, and 8PhD students). I am a coastal scientist with broad interest in obtaining better integrated predictive systems for coastal oceans under climate and anthropogenic changes. My research focuses on coastal, estuarine, and shelf sea dynamics, in particular in relation to mixing, turbulence, and sediment transport.
My expertise primarily lies in process-based modelling of physical processes and a key part of my research involves the development and use of several numerical models targeted at different spatio-temporal scales.
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
Shelf Sea Biogeochemistry NERC Research Programme
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.
A few recent publications,
Amoudry, L.O., P.D. Thorne, A.J. Souza, and P.L.-F. Liu (2016) Parameterization of intrawave sediment pickup above steep ripples, J. Geophys. Res. Oceans, 121, 658-673, doi: 10.1002/2015JC011185
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
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
Other publications can be found on the NERC Open Research Archive.
and some earlier work
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