Dimitri Lague

• We often have opportunities for post-doc researchers interested in state of the art research on LiDAR applied to geomorphological problems, experimental modelling of fluvial dynamics or numerical modelling of landscape evolution and the impact of extreme events (floods, earthquakes). Get in touch with me !

• Landscape evolution with a focus on river dynamics: from long term to present day dynamics
• Physics of erosion processes and sediment transport in mountain rivers.
• Terrestrial and Airborne Laser Scanning applied to geomorphology
• Topo-bathymetric airborne lidar for river monitoring
• Impact of extreme events and on landscape dynamics (floods, earthquakes...)
• Stochastic models in geomorphology
• Biogeomorphological couplings in estuarine dynamics
• Impact and signature of climate and tectonics in landscapes
• Experimental and numerical modelling of landscape and channel evolution.

• Check the Lidar platform website (work in progress) : https://www.lidar-nantes-rennes.eu/.
• See attached poster for more information

OLD Terrestrial Laser Scanning pages (these are not maintained anymore)

Telechargement des données du TP SIG M1

(pdf available on request) Complete list of publication available on google scholar

• 2022: new theoretical developments on the transport of sediment in rivers with a new model adressing the issue of multi-grain size transport. Great work by Marine Le Minor, Post-doc researcher working with Philippe Davy and Jamie Howarth (Rennes) in the context of the NZ projet on post-eartquake hazards cascade and the Brittany region project SEDRISK: A new framework for multigrain transport modelling in landscape evolution models, Le Minor, M., Davy, P., Howarth, J. and Lague, D.,   J. Geophysical Research – Earth Surface
• 2022: a collaboration with Italian colleagues bridging the gap between LiDAR temporal series and stratigraphy applied to meandering tidal channels in the Mt St Michel Bay: Sedimentology of a macrotidal-point bar (Mont-Saint-Michel Bay, NW France) revealed by combining LiDAR time-series and sedimentary core data, Cosma, M, Lague, D., D’Alpaos, A., Leroux, J., Feldmann, B., Ghinassi, M., , Sedimentology
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• 2022: another great paper by Thomas Bernard presenting new methodological developments using 2D hydraulic modelling to quantify landscape organization using high resolution topography. Definitely worth reading, and highlighted in EOS (by AGU) : Hydro-geomorphic metrics for high resolution fluvial landscape analysis, Bernard, T., Davy, P., and Lague, D., Journal of Geophysical Research – Earth Surface, 127 (3), e2021JF006535.
• 2021: a great paper by Thomas Bernard presenting new methodological developments on using repeat airborne lidar processing for landslide detection. By comparing with traditional 2D approaches, the paper demonstrates several limits of classical landslide detection from repeat 2D imagery, in particular a systematic size dependent under detection of landslides on 2D imagery. Definitely worth reading ;-) : Beyond 2D landslide inventories and their rollover: synoptic 3D inventories and volume from repeat lidar data, TG Bernard, D Lague, P Steer, Earth Surface Dynamics 9 (4), 1013-1044

• 2020: LIDAR : two chapters published in the book "Remote Sensing of Geomorphology", Edited by P. Tarolli & S. Mudd. A great book on state of the art techniques applied to understand landscape dynamics.
  • Lague, D. and Feldmann, B, Topo-bathymetric Lidar applied to fluvial geomorphology, chap 4, in Remote Sensing in Geomorphology, eds. P. Tarolli and S. Mudd, Elsevier, 2020.
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  • Lague, D., Terrestrial Laser Scanner applied to fluvial geomorphology, chap 5, in Remote Sensing in Geomorphology, eds. P. Tarolli and S. Mudd, Elsevier, 2020.
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• 2020: Marine Le Minor has joined our team as a post-doc to develop a multi-grain size model in Eros (funding from New-Zealand MBIE/GNS and Région Bretagne).
• 2020: how sediment supply impacts the geometry of mixed bedrock-alluvial rivers. Here are some insights from Ed Baynes work as a post-doc in our team (congrats to Ed, now a lecturer at Loughborough University, UK !):
  • Baynes, E., Lague, D., Steer, P., Bonnet, S., Ilien, L., Sediment flux driven channel geometry adjustment of bedrock and mixed gravel-bedrock rivers, Earth Surface Processes and Landforms, 2020.
• 2020: a new numerical model combining landsliding and fluvial incision:
  • Campforts, B., Shope C. M., Steer, P., Vanmaercke, M., Lague, D. and Braun, J., HyLands 1.0: a Hybrid Landscape evolution model to simulate the impact of landslides and landslide-derived sediment on landscape evolution, Geoscientific Model Development, 2020.
• 2020: paper exploring the use of Airborne Lidar to assess bed grain size in rivers:
  • Use of terrestrial photosieving and airborne topographic LiDAR to asses bed grain size in large rivers: a study on the Rhine River, Chardon, V., Schmitt, L., Piégay, H., Lague, D., Earth Surface Processes and Landforms.
• 2019: paper with Philippe Steer and recent PhD/Post-Doc of the team on how a realistic distribution of co-seismic knickpoint height generated on a fault ask fundamental question on river geometry records past-earthquakes:
  • " Statistical Modelling of co-seismic knickpoint formation and river response to fault slip ", Steer, P., Croissant, T., Baynes, E., and Lague, D., Earth Surface Dynamics.
• 2019: paper exploring the impact of the flexural rigidity of riparian vegetation on the size of the wake zone where sediment is trapped. A nice example of fruitful coupling of 3D lidar data, 3D computational fluid dynamics and vegetation biomechanical properties:
  • "Flexural rigidity and shoot reconfiguration determine wake length behind saltmarsh vegetation patches", Marjoribanks, T., Lague, D., Hardy, R., Boothroyd, R., Leroux, J., Mony, C. and Puijalon, S, JGR Earth Surface.

• 2019 : More stuff on post-seismic landslide evacuation with Thomas Croissant, Philippe Steer and Philippe Davy: "Post-seismic sediment evacuation – from single landslide removal to mountain range global fluxes", Croissant, T, Steer, P., Lague, D. and Davy, P., Geomorphology, 2019

• 2019 : paper exploring the impact of valley confinment and floodplain friction on sediment transport and river morphology. New insights into the importance of considering the full range of discharges, rather than a single effective discharge, when studying fluvial morphodynamics: "Channel Widening Downstream of Valley Gorges Influences by Flod Frequency and Floodplain Roughness", Croissant, T. Lague, D., and Davy, P., JGR Earth Surface.
• 2019 : a long-time collaboration with Stephane Bonnet finally producing a very detailed analysis of terrace generation and complex river response to suply/capacity balance: "Landscape dynamics revealed by luminescence signals of feldspars from fluvial terraces", Bonnet, S., Reimann, T., Wallinga, J., Lague, D. , Davy, P., and Lacoste, A., Scientific Reports.
• 2019: Louise Jeandet has completed her PhD on landslide mechanics and fault sensitivity to surface erosion. Here is the first paper on provoking new idea showing how a super simple mechanical model does actually predict the pdf of landslide area observed in nature, which is significantly controls by hillslope geometry and length: "Coulomb mechanics and landscape shape explains landslide size distribution", Jeandet, L., Steer, P., Lague, D. and Davy, P., Geophysical Research Letters.

• 2018: Thomas Bernard has just started his Phd on "Multi-scale analysis of water and sediment fluxes in landscapes using high resolution LiDAR data and numerical modelling" (supervisors: D. Lague & P. Davy). A project funded by Brittany Region (50%), Topo-bathymetric Airborne LiDAR Platform (25%) and the Fractory (25%).
• 2018 : Following the completion of Ed Baynes's Marie-Curie Post-doc (now in New-Zealand as Post-Doc at Auckland University), here are a series of papers on knickpoint dynamics:

  • Baynes, E., Lague, D. and Kermarrec, J.-J., Supercritical river terraces generated by hydraulic and geomorphic interactions, Geology, 2018.

  • Baynes, E., Lague, D., Attal, M., Gangloff, A., Kirstein, L. and Dugmore, A., River self-organisation inhibits discharge control on waterfall migration, Scientific Reports.
• 2017 : Following the completion of Thomas’s Croissant brillant PhD, a series of papers on the impact of landslide on river dynamics are coming out using the latest version of EROS developed by Philippe Davy.
  • Croissant, T., Lague, D., Steer, P. and Davy, P., Rapid post-seismic landslide evacuation boosted by dynamic channel width, Nature Geosciences, 2017.
  • CNRS/INSU news related to our Nature Geosciences paper on Landslide removal by rivers
  • Davy, P., T. Croissant, and D. Lague, A precipiton method to calculate river hydrodynamics, with applications to flood prediction, landscape evolution models, and braiding instabilities, J. Geophys. Res. Earth Surf., 2017.
  • Croissant, T., Lague, D., Davy, P., Davies, T., and Steer, P. A precipiton-based approach to model hydro-sedimentary hazards induced by large sediment supplies in alluvial fans. Earth Surf. Process. Landforms, 2017.
• 2017: Elevation change and stability on a prograding delta, Wagner, W., Lague, D., Mohrig, D. Passalaqua, P., Shaw, J. and Moffett, K., Geophysical Research Letters, 2017
• 2017: Extreme flood-driven fluvial bank erosion and sediment loads : direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques, Leyland, J., Hackney, C., Darby, S., Parsons, D., Best, J., Nicholas, A., Aalto, R. and Lague, D., Earth Surface Processes and Landforms
• Passalacqua, P., Belmont, P., Staley, D.M., Simley, J.D., Arrowsmith, J. R., Bode, C. A., Crosby, C., DeLong, S. B., Glenn, N., Kelly, S., Lague, D., Sangireddy, H., Schaffrath, K., Tarboton, D., Waskewicz, T., Wheaton, J., Analyzing high resolution topography for advancing the understanding of mass and energy transfer through landscapes : A review, Earth Science Reviews 2015PANIST
• 2014 : qCANUPO and qM3C2 plugins for point cloud classification and comparison are now implemented in the Open Source software CloudCompare. Much faster and easier to use.

• ANR WIva (the width of valleys), lead by Sebastien Carretier at LETG has been funded, starting in 2022! Our team will work on revisiting field sites in new zealand to measure erosion over 14 years with Terrestrial Lidar, and new development are planned by P. Davy on riverlab.
• More project funded by MBIE ! Congrats to Pascal Sirguey (Otago University) for the Matariki project whose ambition is to revolutionize the monitoring of environment through satellite photogrammetry and 3D change detection. I'll be an "advisor" on the project.
• Congrats to Philippe Steer's for his ERC. I'll contribute as senior staff (ERC FEASIBle)
• Major project funded by MBIE (PI: Chris Massey, GNS) on studying Kaikoura earthquake induced landscape change. The Rennes team will contribute through numerical modelling on post-EQ river dynamics.
• Thanks to the support of Brittany Region who co-funds the PhD of Thomas Bernard on revisiting geomorphological analysis of high resolution topographic data (project LIDAREAU, 2018)
• Projet INSU/SYSTER/EROFRAC (2018): rôle de la fracturation dans l'érosion (thèse C. Astrié)
• Thanks to the support of Rennes Metropole, an engineer position for 2 years has been funded for the Lidar Topo-bathymetric platform
• ANR PICS (2018-2022): Prevision Immediate des Crues Soudaines (site web : http://pics.ifsttar.fr/)
• Airborne Topo-Bathymetric lidar, funded by Regional Councils : Pays de la Loire, Brittanny, and FEDER european funds (2015)
• CNRS/PEPS Terre-Mer : Modélisation numérique de l’impact de la végétation pionnière en Baie du Mt St Michel sur la sédimentation et comparaison avec données lidar terrestre, collab. Ifremer/dyneco, 2014
• "SEDIQUAKE : hydrosedimentary hazards following an M8 earthquake on the Alpine Fault, New-Zealand", INSU/ALEAS, 2014.
• "Biogeomorphological couplings in mega-tidal salt marshes", INSU/EC2CO/DRIL, 2012-2013
• "EROSNZ - landslides, floods and erosion : new insights from event-based field measurements in the Southern Alps of New Zealand and stochastic 2D numerical modeling of long-term landscape evolution, funded by EEC MCIOF (2011-2012).