Position: Reader

Room: 305 Craig Mair

Phone: 01248 382894

E-mail: j.baas@bangor.ac.uk

Web: Google Scholar, ResearchGate

I am Reader in Fine Particle Dynamics in the School of Ocean Sciences, and specialise in the erosion, transport, and deposition of fine, cohesive sediment. I graduated from the University of Utrecht (the Netherlands) with a combined BSc/MSc in Sedimentary Geology in 1988. At the same university, I completed my PhD in Bedform Dynamics in 1993. Subsequently, I was Postdoctoral Research Fellow at Geomar Research Centre in Kiel, Germany (studying Late-Pleistocene climate signals in slope sediments from the North-Atlantic continental margin), at the University of Rouen, France (on resuspension processes in the Seine estuary and gravel mining in the English Channel), and at the University of Bergen, Norway (investigating grain orientations in turbidite deposits).

In 1998, I moved to the School of Earth and Environment at the University of Leeds, where I started as a Marie Curie Research Fellow and then became a Senior Research Fellow. My research in Leeds included the physical properties of particulate density currents and their deposits and the dynamics of turbulence-modulated flows carrying cohesive clay particles. I took up my present post in Bangor in January 2007.

I am a process sedimentologist with more than 25 years of experience in sediment transport in fluvial, shallow marine, and deep-marine environments. My main fundamental and applied research interests include physical and biological cohesion in fine-grained sediment, the dynamics of sedimentary bedforms, and sediment gravity flows in the deep ocean, but my expertise also stretches to hydraulic engineering, palaeoclimatology, and mathematical modelling. I combine experimental research with field work to answer timely research questions, taking a blue-skies approach as well as collaborating with industry.

Research Area

Sediment Dynamics and Morphology

• BSc: Sedimentary Geology (Utrecht University)
  1988
• PhD: Bedform Dynamics (Utrecht University)

I teach a range of undergraduate and postgraduate modules in geological oceanography, sedimentology, physical geography, and general research skills. 

In Bangor, I have supervised 9 PhD students (3 as lead supervisor).

Marijke de Vet: Turbulent-laminar transitions in flows laden with cohesive sediment  (Dorrell, Hull; Baas, Bangor), Funded by Turbidite Research Group, Leeds.

Megan Baker: Effect of clay type on sediment gravity flow dynamics (Baas, Bangor), Funded by StatOil.

Melissa Craig: Effect of cohesive biological polymers on sediment gravity flow dynamics (Amos, Adelaide; Baas, Bangor; Strachan, New Zealand), Funded by University of Adelaide.

Connor McCarron: Hiding-exposure effect on the transport of mixed sand-gravel (van Landeghem, Baas, Bangor), Funded by NERC.

Dougal Lichtman: Combined effects of hydrodynamics and cohesive clay on bedform morphology and migration on sand tidal flats (Thorne, Amoudry, NOC Liverpool; Baas, Bangor), Funded by NERC.

Julie Hope: The biological mediation of cohesive and non-­cohesive sediment dynamics (Paterson, USTAN; Baas, Bangor), Funded by NERC.

Xuxu Wu: Wave ripple development in mixed clay-sand (Parsons, Hull; Baas, Bangor), Funded by University of Hull.

Cai Ladd: Ecological resilience in a hydrological context: Interactions of biological and physical processes on patterns of saltmarsh erosion (Skov, Baas, Bangor), Funded by NERC.

Iris Verhagen: Flow-sediment interactions in turbidity currents moving over soft, muddy beds (Baas, Bangor; McCaffrey, Leeds), Funded by Turbidite Research Group, Leeds.

2025

• E-pub ahead of printDistinguishing microbially induced sedimentary structures from fluid-induced interfacial deformation structures (MISS versus FIDS)
  Wignall, P. B., Peakall, J., Best, J. & Baas, J., 7 Mar 2025, (E-pub ahead of print) In: The Geological Society Special Publications. 556, 1
  Research output: Contribution to journal › Article › peer-review
• E-pub ahead of printSoftgrounds: Substrates controlled by sediment gravity flows and the evolution of deep-water trace fossils
  Wang, Y., Wignall, P. B., Peakall, J., Baas, J. & Poulton, S. W., 13 Mar 2025, (E-pub ahead of print) In: The Geological Society Special Publications. 556, 1, SP556-2025-17.
  Research output: Contribution to journal › Article › peer-review

2024

• E-pub ahead of printComing to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?
  Baas, J., Hewitt, W., Lokier, S. & Hendry, J., 27 Nov 2024, (E-pub ahead of print) In: The Depositional Record.
  Research output: Contribution to journal › Article › peer-review
• PublishedEffect of Bed Clay on Surface Water-Wave Reconstruction from Ripples
  Malarkey, J., Pollard, E., Fernández, R., Xuxu, W., Baas, J. & Parsons, D., 28 Dec 2024, In: Scientific Reports. 14, 1, p. 30688 30688.
  Research output: Contribution to journal › Article › peer-review
• PublishedFine sediment in mixed sand-silt environments impact bedform geometry by altering sediment mobility
  de Lange, S. L., Niesten, I., van de Veen, S. H. J., Baas, J., Lammers, J., Waldschlaeger, K., Boelee, D. & Hoitink, A. J. F., Jul 2024, In: Water Resources Research. 60, 7, e2024WR037065.
  Research output: Contribution to journal › Article › peer-review
• PublishedFlow-induced Interfacial Deformation Structures (FIDS): Implications for the interpretation of palaeocurrents, flow dynamics and substrate rheology
  Peakall, J., Best, J., Baas, J., Wignall, P. B., Hodgson, D. M. & Łapcik, P., Oct 2024, In: Sedimentology. 71, 6, p. 1709-1743
  Research output: Contribution to journal › Article › peer-review
• PublishedInfluence of cohesive clay on wave–current ripple dynamics captured in a 3D phase diagram
  Xuxu, W., Malarkey, J., Fernández, R., Baas, J., Pollard, E. & Parsons, D., 30 Jan 2024, In: Earth Surface Dynamics. 12, p. 231-247
  Research output: Contribution to journal › Article › peer-review
• E-pub ahead of printIntegrating transitional-flow signatures into hybrid event beds: Implications for hybrid flow evolution on a submarine lobe fringe
  Łapcik, P. & Baas, J., 4 Sept 2024, (E-pub ahead of print) In: Journal of Sedimentary Research.
  Research output: Contribution to journal › Article › peer-review
• PublishedMarine redox dynamics and biotic response to the mid-Silurian Ireviken Extinction Event in a mid-shelf setting
  Wang, Y., Wignall, P. B., Xiong, Y., Loydell, D. K., Peakall, J., Baas, J. H., Mills, B. J. W. & Poulton, S. W., 10 May 2024, In: Journal of the Geological Society. 181, 4, jgs2023-155.
  Research output: Contribution to journal › Article › peer-review
• PublishedOn the origin of chevron marks and striated grooves, and their use in predicting mud bed rheology
  McGowan, D., Salian, A., Baas, J., Peakall, J. & Best, J., Feb 2024, Sedimentology, 71, 2, p. 687-708 22 p.
  Research output: Contribution to specialist publication › Article
• PublishedPreservation of groove mark striae formed by armoured mud clasts: the role of armour sediment size and bed yield stress
  Lock, C., Reid, M., Baas, J. & Peakall, J., Sept 2024, In: The Depositional Record. 10, 4, p. 426-440
  Research output: Contribution to journal › Article › peer-review
• Accepted/In pressUsing mixed-clay sediment gravity flow rheology as an indicator for flow velocity and run-out distance
  Baker, M., Baas, J., Malarkey, J. & Silva Jacinto, R., 10 Jul 2024, (Accepted/In press) Particulate Gravity Currents in the Environment. American Geophysical Union
  Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

2023

• PublishedDoes sand promote or hinder the mobility of cohesive sediment gravity flows?
  Baker, M. L. & Baas, J., Feb 2023, In: Sedimentology. 70, 4, p. 1110-1130 21 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedStreamwise turbulence modulation in non-uniform open-channel clay suspension flows
  de Vet, M. G. W., Fernandez, R., Baas, J. H., McCaffrey, W. D. & Dorrell, R. M., Aug 2023, In: Journal of Geophysical Research: Earth Surface. 128, 8, e2022JF006781.
  Research output: Contribution to journal › Article › peer-review

2022

• PublishedBlood, lead and spheres: a hindered settling equation for sedimentologists based on metadata analysis
  Baas, J. H., Baker, M. L., Buffon, P., Strachan, L. J., Bostock, H. C., Hodgson, D. M., Eggenhuisen, J. T. & Spychala, Y. T., Jun 2022, In: The Depositional Record. 8, 2, p. 603-615 13 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedDiscontinuity in Equilibrium Wave–Current Ripple Size and Shape and Deep cleaning associated with Cohesive Sand–Clay Beds
  Wu, X., Fernández, R., Baas, J., Malarkey, J. & Parsons, D. R., Sept 2022, In: Journal of Geophysical Research: Earth Surface. 127, 9, p. e2022JF006771 e2022JF006771.
  Research output: Contribution to journal › Article › peer-review
• PublishedEffect of biological polymers on mobility and run-out distance of cohesive and non-cohesive sediment gravity flows
  Sobocinska, A. & Baas, J., 1 Oct 2022, In: Marine Geology. 452, 106904.
  Research output: Contribution to journal › Article › peer-review

2021

• PublishedCurrent- and Wave-Generated Bedforms on Mixed Sand–Clay Intertidal Flats: A New Bedform Phase Diagram and Implications for Bed Roughness and Preservation Potential
  Baas, J., Malarkey, J., Lichtman, I. D., Amoudry, L. O., Thorne, P., Hope, J. A., Peakall, J., Paterson, D. M., Bass, S., Cooke, R. D., Manning, A. J., Parsons, D. & Ye, L., 3 Nov 2021, In: Frontiers Earth Science. 9, 747567.
  Research output: Contribution to journal › Article › peer-review
• PublishedRapid gravity flow transformation revealed in a single climbing ripple
  Baas, J. H., Best, J. & Peakall, J., 1 May 2021, In: Geology. 49, 5, p. 493-497
  Research output: Contribution to journal › Article › peer-review
• PublishedSole marks reveal deep-marine depositional process and environment: implications for flow transformation and hybrid event bed models
  Baas, J., Tracey, N. D. & Peakall, J., 4 Oct 2021, In: Journal of Sedimentary Research. 91, 9, p. 986–1009
  Research output: Contribution to journal › Article › peer-review

2020

• PublishedAn integrated process-based model of flutes and tool marks in deep-water environments: implications for palaeohydraulics, the Bouma sequence, and hybrid event beds
  Peakall, J., Best, J., Baas, J. H., Hodgson, D. M., Clare, M. A., Talling, P. J., Dorrell, R. M. & Lee, D. R., Jun 2020, In: Sedimentology. 67, 4, p. 1601-1666 66 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedBiomediation of submarine sediment gravity flow dynamics
  Craig, M., Baas, J. H., Amos, K. J., Strachan, L. J., Manning, A. J., Paterson, D. M., Hope, J. A., Nodder, S. D. & Baker, M. L., Jan 2020, In: Geology. 48, 1, p. 72-76
  Research output: Contribution to journal › Article › peer-review
• PublishedInteractions between sediment microbial ecology and physical dynamics drive heterogeneity in contextually similar depositional systems
  Hope, J. A., Malarkey, J., Baas, J. H., Peakall, J., Parsons, D., Manning, A. J., Bass, S., Lichtman, I., Thorne, P., Ye, L. & Paterson, D. M., Oct 2020, In: Limnology and Oceanography. 65, 10, p. 2403-2419
  Research output: Contribution to journal › Article › peer-review
• PublishedMixed Sand—Mud Bedforms Produced by Transient Turbulent Flows in the Fringe of Submarine Fans: Indicators of Flow Transformation
  Baker, M. L. & Baas, J. H., Aug 2020, In: Sedimentology. 67, 5, p. 2645-2671 27 p.
  Research output: Contribution to journal › Article › peer-review

2019

• PublishedDynamics and deposition of sediment-bearing multi-pulsed flows and geological implication
  Ho, V. L., Dorrell, R. M., Keevil, G., Thomas, R. E., Burns, A. D., Baas, J. H. & McCaffrey, W. D., Nov 2019, In: Journal of Sedimentary Research. 89, 11, p. 1127-1139
  Research output: Contribution to journal › Article › peer-review
• PublishedIntegrating field and laboratory approaches for ripple development in mixed sand-clay-EPS
  Baas, J. H., Baker, M., Malarkey, J., Bass, S. J., Manning, A. J., Hope, J. A., Peakall, J., Lichtman, I., Ye, L., Davies, A., Parsons, D. R., Paterson, D. M. & Thorne, P. D., Dec 2019, In: Sedimentology. 66, 7, p. 2749-2768 20 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedThe hiding-exposure effect revisited: A method to calculate the mobility of bimodal sediment mixtures
  McCarron, C. J., Van Landeghem, K. J. J., Baas, J. H., Amoudry, L. O. & Malarkey, J., Apr 2019, In: Marine Geology. 410, p. 22-31
  Research output: Contribution to journal › Article › peer-review

2018

• PublishedBedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport predictions
  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., 15 Aug 2018, In: Geomorphology. 315, p. 17-32 66 p.
  Research output: Contribution to journal › Article › peer-review
• PublishedWave ripple development on mixed clay–sand substrates: Effects of clay winnowing and armoring
  Wu, X., Baas, J. H., Parsons, D. R., Eggenhuisen, J., Amoudry, L., Cartigny, M., McLelland, S., Mouazé, D. & Ruessink, G., Nov 2018, In: Journal of Geophysical Research: Earth Surface. 123, 11, p. 2784-2801 35 p.
  Research output: Contribution to journal › Article › peer-review

2017

• PublishedThe Effect of Clay Type on the Properties of Cohesive Sediment Gravity Flows and their Deposits
  Baker, M. L., Baas, J. H., Malarkey, J., Silva Jacinto, R., Craig, M. J., Kane, I. A. & Barker, S., 2017, In: Journal of Sedimentary Research. 87, 11, p. 1176-1195 59 p.
  Research output: Contribution to journal › Article › peer-review

2016

• Published5th International Conference on Marine & River Dune Dynamics (MARID), April 4th-6th, Caernarfon, UK
  Van Landeghem, K., Garlan, T., Baas, J. H. & Van Landeghem, K. J. (Editor), 4 Apr 2016, Unknown Publisher.
  Research output: Book/Report › Book
• PublishedComparing the transitional behaviour of kaolinite and bentonite suspension flows
  Baas, J., Best, J. L. & Peakall, J., Oct 2016, In: Earth Surface Processes and Landforms. 41, 13, p. 1911-1921
  Research output: Contribution to journal › Article › peer-review
• PublishedPredicting bedforms and primary current stratification in cohesive mixtures of mud and sand
  Baas, J. H., Best, J. L. & Peakall, J., Jan 2016, In: Journal of the Geological Society. 173, 1, p. 12-45
  Research output: Contribution to journal › Article › peer-review
• PublishedThe role of biophysical cohesion on subaqueous bed form size
  Parsons, D. R., Schindler, R. J., Hope, J. A., Malarkey, J., Baas, J. H., Peakall, J., Manning, A. L., Ye, L., Simmons, S., Paterson, D. M., Aspden, R. J., Bass, S. J., Davies, A. G., Lichtman, I. D. & Thorne, P. D., 28 Jan 2016, In: Geophysical Research Letters. 43, p. 1566-1573
  Research output: Contribution to journal › Article › peer-review
• PublishedThresholds of intrabed flow and other interactions of turbidity currents with soft muddy substrates
  Baas, J., Manica, R., Puhl, E. & Borges, A. L. D. O., 1 Dec 2016, In: Sedimentology. 63, 7, p. 2002-2036
  Research output: Contribution to journal › Article › peer-review

2015

• PublishedSticky stuff: Redefining bedform prediction in modern and ancient environments
  Schindler, R. J., Parsons, D. R., Ye, L., Hope, J. A., Baas, J. H., Peakall, J., Manning, A. J., Aspden, R. J., Malarkey, J., Simmons, S., Paterson, D. M., Lichtman, I. D., Davies, A. G., Thorne, P. D. & Bass, S. J., 27 Mar 2015, In: Geology.
  Research output: Contribution to journal › Article › peer-review
• PublishedThe pervasive role of biological cohesion in bedform development
  Malarkey, J., Baas, J. H., Hope, J. A., Aspenden, R. J., Parsons, D. R., Peakall, J., Peterson, D. M., Schindler, R. J., Ye, L., Lichtman, I. D., Bass, S. J., Davies, A. G., Manning, A. J. & Thorne, P. D., 6 Feb 2015, In: Nature Communications. 6, 6257
  Research output: Contribution to journal › Article › peer-review

2014

• PublishedProcesses and products of turbidity currents entering soft muddy substrates
  Baas, J. H., Manica, R., Puhl, E., Verhagen, I. & de O.Borges, A. L., May 2014, In: Geology. 42, 5, p. 371-374
  Research output: Contribution to journal › Article › peer-review
• PublishedSediment Composition Influences Spatial Variation in the Abundance of Human Pathogen Indicator Bacteria within an Estuarine Environment
  Perkins, T. L., Clements, K., Baas, J. H., Jago, C. F., Jones, D. L., Malham, S. K. & McDonald, J. E., 14 Nov 2014, In: PLoS ONE. 9, 11
  Research output: Contribution to journal › Article › peer-review
• PublishedWave ripples in mixtures of cohesive clay and cohesionless sand: Preliminary results
  Baas, J. H., Westlake, A., Eggenhuisen, J., Amoudry, L., Cartigny, M., Coultish, N., McLelland, S., Mouazé, D., Murphy, B., Parsons, D., Rosewell, K., Ruessink, G., Schrijvershof, R., Wu, X. & Ye, L., 1 Jul 2014.
  Research output: Contribution to conference › Paper

2013

• PublishedBedform development in mixed sand–mud: The contrasting role of cohesive forces in flow and bed
  Baas, J. H., Davies, A. G. & Malarkey, J., 15 Jan 2013, In: Geomorphology. 182, p. 19-32
  Research output: Contribution to journal › Article › peer-review

2012

• PublishedReversed sediment wave migration in the Irish Sea, NW Europe: A reappraisal of the validity of geometry-based predictive modelling and assumptions
  Van Landeghem, K. J., Baas, J. H., Mitchell, N., Wilcockson, D. & Wheeler, A. J., 15 Feb 2012, In: Marine Geology. 295-298, p. 95-112
  Research output: Contribution to journal › Article › peer-review

2011

• PublishedDepositional processes, bedform development and hybrid bed formation in rapidly decelerated cohesive (mud–sand) sediment flows
  Baas, J. H., Best, J. L. & Peakall, J., 1 Dec 2011, In: Sedimentology. 58, 7, p. 1953-1987
  Research output: Contribution to journal › Article › peer-review

2009

• PublishedA phase diagram for turbulent, transitional and laminar clay suspension flows.
  Baas, J. H., Best, J. L., Peakall, J. & Wang, M., 1 Mar 2009, In: Journal of Sedimentary Research. 79, 3-4, p. 162-183
  Research output: Contribution to journal › Article › peer-review

2008

• PublishedComparing flume and computer simulated turbidite flows – Implications for sediment deposition patterns and reservoir quality.
  Bond, C. E., Baas, J. H., Vinnels, J., McCaffrey, W., Waltham, D. & McClean, S., 1 Jan 2008.
  Research output: Contribution to conference › Paper
• PublishedCoupling flow and deposit properties of partly cohesive high-density turbidity currents: An experimental approach.
  Manica, R., Baas, J. H., Peakall, J., Maestri, R. D. & Borges, A. O., 1 Jan 2008.
  Research output: Contribution to conference › Paper
• PublishedFlow behaviour of ponded turbidity currents: an experimental study.
  Patacci, M., McCaffrey, W. M., Haughton, P., Baas, J. H. & Keevil, G., 1 Jan 2008.
  Research output: Contribution to conference › Paper
• PublishedOn the flow of natural clay suspensions over smooth and rough beds.
  Baas, J. H. & Best, J. L., 1 Jan 2008.
  Research output: Contribution to conference › Paper
• PublishedThe dynamics of turbulent, transitional and laminar clay-laden flow over a fixed current ripple.
  Baas, J. H. & Best, J. L., 1 Jun 2008, In: Sedimentology. 55, 3, p. 635-66
  Research output: Contribution to journal › Article › peer-review
• PublishedThe river-estuarine transition zone (RETZ) of the Afon Dyfi (West Wales) as test bed for sediment transfer between river catchments and coastal environments.
  Baas, J. H., Jago, C. F., Macklin, M. & CCCR Team, 1 Jan 2008.
  Research output: Contribution to conference › Paper

2007

• PublishedBedform development below transient turbulent, partly cohesive open-channel flows.
  Baas, J. H., Best, J. L. & Kellman, P., 1 Jan 2007.
  Research output: Contribution to conference › Paper
• PublishedCan vertical stacking of low-angle bedforms produce rhythmic bedding in slurry flow deposits?
  Baas, J. H., Best, J. L. & Peakall, J., 1 Jan 2007.
  Research output: Contribution to conference › Paper
• PublishedConcepts and applications of fluvial sedimentology: Towards interdisciplinary analysis of process and product.
  Weltje, G. J., Hoogendoorn, R. M., Marriott, S. B. & Baas, J. H., 15 Nov 2007, In: Sedimentary Geology. 202, 1-2, p. 1-4
  Research output: Contribution to journal › Article › peer-review
• PublishedDirectional petrological characterisation of deep-marine sandstones using grain fabric and permeability anisotropy: methodologies, theory, application and suggestions for integration.
  Baas, J. H., Hailwood, E. A., McCaffrey, W. D., Kay, M. & Jones, R., 1 May 2007, In: Earth Science Reviews. 82, 1-2, p. 101-142
  Research output: Contribution to journal › Article › peer-review
• PublishedHandbook of Clay Science, by F. Bergaya, B.K.G. Theng & G. Lagaly - Book Review
  Baas, J. H., 1 Mar 2007, Unknown.
  Research output: Other contribution
• PublishedModelling rheological and turbulence regimes in kaolinite-rich sediment flows.
  Silva Jacinto, R. & Baas, J. H., 1 Jan 2007.
  Research output: Contribution to conference › Paper
• PublishedSuspended and bedload dynamics in a tidally influenced river: the river Dyfi, Wales, UK.
  Brewer, P., Vericat, D., Baas, J. H., Jago, C. F., Brasington, J., Wheaton, J. M. & Causer, F., 1 Jan 2007.
  Research output: Contribution to conference › Paper

2006

• PublishedAn experimental model for turbulence modulation in natural clay-laden flows over flat beds, ripples and dunes.
  Baas, J. H., Best, J. L. & Kellman, P., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedBedforms in high concentration flows – Preliminary results of laboratory experiments.
  Kellman, P., Best, J. L., Baas, J. H., Peakall, J. & Parsons, D., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedBehaviour of fully ponded turbidity currents in confined basins: An experimental study.
  Patacci, M., McCaffrey, W. M., Haughton, P., Baas, J. H. & Keevil, G., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedCan vertical stacking of low-angle bedforms produce rhythmic bedding in slurry flow deposits.
  Baas, J. H., Best, J. L. & Peakall, J., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedElectrical resistance tomography for suspended sediment measurements in open channel flows using a novel sensor design.
  Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 1 Oct 2006, In: Particle and Particle Systems Characterization. 23, 3-4, p. 313-320
  Research output: Contribution to journal › Article › peer-review
• PublishedExperimental model for turbulence modulation in natural clay-laden flows.
  Baas, J. H., Best, J. L., Peakall, J. & Wang, M., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedExperimental turbidity current transport and deposition using scaled realistic bathymetry.
  Baas, J. H., McCaffrey, W. D., Pattaci, M. & Wyton, J., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedFlow dynamics and depositional properties of cohesive mixed sand-mud currents with transient turbulent behaviour.
  Baas, J. H., Best, J. L., Peakall, J., McCaffrey, B. & Wang, M., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedGrain fabric control on directional permeability in deep-marine sandstones.
  Baas, J. H., McCaffrey, W. D., Hailwood, E. & Kay, M., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedNon-cohesive, mixed and cohesive high-density turbidity currents: Flow and deposit properties inferred from laboratory experiments.
  Manica, R., Baas, J. H., De Oliveira Borges, A. L., Maestri, R. D., Peakall, J. & McCaffrey, W. D., 1 Jan 2006.
  Research output: Contribution to conference › Paper
• PublishedPhysical Processes in Earth and Environmental Sciences, by M. Leeder & M. Pérez-Arlucea
  Baas, J. H., 1 Sept 2006, Unknown.
  Research output: Other contribution
• PublishedThe Deep-Water Architecture Knowledge Base: Towards objective comparison of deep-marine sedimentary systems.
  Baas, J. H. & McCaffrey, W. D., 1 Jan 2006.
  Research output: Contribution to conference › Paper

2005

• PublishedComparison of spatio-temporal evolution of experimental particulate gravity flows at two different initial concentrations, based on velocity, grain size and density data.
  Choux, C. M., Baas, J. H., McCaffrey, W. D. & Haughton, P. D., 1 Aug 2005, In: Sedimentary Geology. 179, 1-2, p. 49-69
  Research output: Contribution to journal › Article › peer-review
• PublishedCoupling between suspended sediment distribution and turbulence structure in a laboratory turbidity current.
  Baas, J. H., McCaffrey, W. D., Haughton, P. D. & Choux, C., 1 Jan 2005, In: Journal of Geophysical Research - Oceans. 110, c11, p. C11015
  Research output: Contribution to journal › Article › peer-review
• PublishedDetection and quantification of suspended sediment concentration and stratification in open channel flows: development and first results using electrical resistance tomography.
  Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 5 Sept 2005.
  Research output: Contribution to conference › Paper
• PublishedDetection and quantification of suspension concentrations and sedimentation layers in channel flows using electrical resistance tomography.
  Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedEnhanced fault seal evaluation of turbidite systems in mature basins: Examples from around the globe.
  Bradbury, P. W., Freeman, S. R., Harris, S. D., Knipe, R. J., McCaffrey, W. D., Baas, J. H. & Lewis, G., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedExperimental passive fill of U-shaped burrows.
  Kellman, P., Baas, J. H., Best, J. L. & Uchman, A., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedIntroduction to the Physics of Cohesive Sediment Dynamics in the Marine Environment, by J.C.Winterwerp & C. Van Kesteren
  Baas, J. H., 1 Sept 2005, Unknown.
  Research output: Other contribution
• PublishedSediment gravity flows: Recent advances in process and field analysis – Introduction
  Baas, J. H., 1 Aug 2005, In: Sedimentary Geology. 179, 1-2, p. 1-3
  Research output: Contribution to journal › Article › peer-review
• PublishedSubmarine Mass Movements and their Consequences, by J. Locat, & J. Mienert
  Baas, J. H. & Strachan, L., 1 May 2005, Unknown.
  Research output: Other contribution
• PublishedThe Deep-Water Architecture Knowledge Base: Towards objective comparison of deep-marine sedimentary systems.
  Baas, J. H., McCaffrey, W. D. & Knipe, R. J., 1 Nov 2005, In: Petroleum Geoscience. 11, 4, p. 309-320
  Research output: Contribution to journal › Article › peer-review
• PublishedTurbulence-modulated clay-laden flow over flat beds, ripple and dunes.
  Baas, J. H. & Best, J. L., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedTurbulence modulation in clay-laden flows over ripples and dunes.
  Baas, J. H. & Best, J. L., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedTurbulence modulation in clay-rich flows: Implications for depositional process and bed form geometry.
  Baas, J. H. & Best, J. L., 1 Jan 2005.
  Research output: Contribution to conference › Paper
• PublishedWhen is a clay-laden current turbulent, transitional or laminar? A new stability diagram based on flow dynamics and clay concentration.
  Baas, J. H., Best, J. L., Peakall, J. & Wang, M., 1 Jan 2005.
  Research output: Contribution to conference › Paper

2004

• PublishedComparison of spatio-temporal evolution of experimental particulate gravity flows at two different initial concentrations, based on velocity, grain size and density data.
  Choux, C., Baas, J. H., McCaffrey, W. D. & Haughton, P. D., 1 Jan 2004.
  Research output: Contribution to conference › Paper
• PublishedConditions for formation of massive turbiditic sandstones by primary depositional processes.
  Baas, J. H., 1 Apr 2004, In: Sedimentary Geology. 166, 3-4, p. 292-310
  Research output: Contribution to journal › Article › peer-review
• PublishedConfined Turbidite Systems, by S.A. Lomas & P. Joseph
  Baas, J. H., 1 Jan 2004, Unknown.
  Research output: Other contribution
• PublishedCritical parameters for cross-fault flow within deep marine clastic reservoirs: An integrated 3D stratigraphic and structural approach.
  Bradbury, P. W., Freeman, S. R., Harris, S. D., Knipe, R. J., McCaffrey, W. D. & Baas, J. H., 1 Jan 2004.
  Research output: Contribution to conference › Paper
• PublishedDeposits of depletive high-density turbidity currents: a flume analogue of bed geometry, structure and texture.
  Baas, J. H., Van Kesteren, W. & Postma, G., 1 Oct 2004, In: Sedimentology. 51, 5, p. 1053-1088
  Research output: Contribution to journal › Article › peer-review
• PublishedEarth Science Editorial.
  Baas, J. H., 1 Feb 2004, In: Annals of the Marie Curie Fellowships. 3, p. 42
  Research output: Contribution to journal › Article › peer-review
• PublishedPassive sediment filling of U-shaped animal burrows.
  Kellman, P., Baas, J. H., Best, J. L. & Uchman, A., 1 Jan 2004.
  Research output: Contribution to conference › Paper
• PublishedTemporal flow structure of an experimental particulate density current linked to textural variation of the resultant flume deposit.
  Barker, S., McCaffrey, B., Haughton, P., Baas, J. H. & Choux, C., 1 Jan 2004.
  Research output: Contribution to conference › Paper
• PublishedTurbulence modulation behind ripples and dunes in clay-laden currents.
  Baas, J. H. & Best, J. L., 1 Jan 2004.
  Research output: Contribution to conference › Paper

2003

• PublishedFine Sediment Dynamics in the Marine Environment, by J.C. Winterwerp & C. Kranenberg
  Baas, J. H. & Felix, M., 1 Jan 2003, Unknown.
  Research output: Other contribution
• PublishedLooking inside turbidity currents: the effects of spatial and temporal changes in velocity, concentration and grain size on depositional properties.
  Baas, J. H., McCaffrey, W. D., Choux, C. & Haughton, P. D., 1 Jan 2003.
  Research output: Contribution to conference › Paper
• PublishedMuddy Coasts of the World: Processes, Deposits and Function, by T. Healy, Y. Wang & J.-A. Healy
  Baas, J. H., 1 Jan 2003, Unknown.
  Research output: Other contribution
• PublishedRipple, Ripple Mark, Ripple Structure.
  Baas, J. H. & Middleton, G. V. (Editor), 1 Jan 2003, Encyclopedia of Sediments and Sedimentary Rocks. 2003 ed. Kluwer Academic Publishers, p. 565-567
  Research output: Chapter in Book/Report/Conference proceeding › Chapter
• PublishedSpatio-temporal evolution of velocity structure, concentration and grainsize stratification within experimental particulate gravity currents.
  McCaffrey, W. D., Choux, C. M., Baas, J. H. & Haughton, P. D., 1 Jun 2003, In: Marine and Petroleum Geology. 20, 6-8, p. 851-860
  Research output: Contribution to journal › Article › peer-review

2002

• PublishedEarth Science Editorial.
  Baas, J. H., 1 Jul 2002, In: Annals of the Marie Curie Fellowships. 2, p. 34
  Research output: Contribution to journal › Article › peer-review
• PublishedExperimental constraints on shear mixing rates and processes: implications for the dilution of submarine debris flows
  Talling, P. J., Peakall, J., Sparks, R. S., O'Cofaigh, C., Dowdeswell, J. A., Felix, M., Wynn, R. B., Baas, J. H., Hogg, A. J., Masson, D. G., Taylor, J. & Weaver, P. P., 1 Jan 2002, Glacier-Influenced Sedimentation on High-Latitude Continental Margins. 2002 ed. Geological Society Publishing House, p. 89-104
  Research output: Chapter in Book/Report/Conference proceeding › Chapter
• PublishedFlume analogue of geometry, structure and texture of high-density turbidity current deposits at the mouth of deep-marine channels.
  Baas, J. H. & Postma, G., 1 Jan 2002.
  Research output: Contribution to conference › Paper
• PublishedTurbulence modulation in clay-rich sediment-laden flows and some implications for sediment deposition.
  Baas, J. H. & Best, J. L., 1 Jan 2002, In: Journal of Sedimentary Research. 72, 3, p. 336-340
  Research output: Contribution to journal › Article › peer-review

2001

• PublishedCan sedimentological flows with small amounts of clay particles form massive sandstone beds?
  Baas, J. H. & Best, J. L., 1 Jan 2001.
  Research output: Contribution to conference › Paper
• PublishedClast-rich debrite and slurry intervals sandwiched within co-genetic turbiditic sandstone: origin, lateral extent and baffle potential.
  Talling, P., Amy, L., McCaffrey, B., Baas, J. H., Peakall, J., Stanbrook, D., Clark, J., Wynn, R., Gee, M. & Masson, D., 1 Jan 2001.
  Research output: Contribution to conference › Paper
• PublishedSand Deposition from High-Density Turbidity Currents: Implications for the Emplacement Mode, Internal Structure, Texture and Geometry of Deep-Water Massive Sandstone Beds.
  Baas, J. H., 1 Jan 2001, 2001 ed. Unknown.
  Research output: Book/Report › Commissioned report

2000

• PublishedClay-laden currents: transition between turbulent and laminar flow and implications for the genesis of massive sand beds.
  Baas, J. H. & Best, J. L., 1 Jan 2000.
  Research output: Contribution to conference › Paper
• PublishedDuration of deposition from decelerating high-density turbidity currents.
  Baas, J. H., Van Dam, R. L. & Storms, J. E., 1 Oct 2000, In: Sedimentary Geology. 136, 1-2, p. 71-88
  Research output: Contribution to journal › Article › peer-review
• PublishedExperimental Research on Hydraulics and Depositional Mechanisms of High-Density Turbidity Currents.
  Baas, J. H., 1 Jan 2000, 2000 ed. Unknown.
  Research output: Book/Report › Commissioned report
• PublishedEZ-ROSE: a computer program for equal-area circular histograms and statistical analysis of two-dimensional vectorial data.
  Baas, J. H., 1 Mar 2000, In: Computers and Geosciences. 26, 2, p. 153-166
  Research output: Contribution to journal › Article › peer-review
• PublishedRipple formation induced by biogenic mounds – Comment
  Baas, J. H. & Best, J. L., 15 Aug 2000, In: Marine Geology. 168, 1-4, p. 145-151
  Research output: Contribution to journal › Article › peer-review
• PublishedTDURE : A mathematical model for the duration of deposition from decelerating high-density turbidity currents.
  Baas, J. H., Van Dam, R. L. & Storms, J. E., 1 Jan 2000, p. 74-75.
  Research output: Contribution to conference › Paper
• PublishedTextural characteristics of deep-marine massive sandstones: distinguishing between deposits of turbiditic and debris flow origin.
  Baas, J. H., Nemec, W. & Ravnas, R., 1 Jan 2000.
  Research output: Contribution to conference › Paper
• PublishedTurbulence modulation in high-concentration clay-rich flows and the possible origin of “massive” sand beds.
  Baas, J. H. & Best, J. L., 1 Jan 2000, p. 6-7.
  Research output: Contribution to conference › Paper
• PublishedVisualizing the flow fields of sediment-laden density currents.
  Peakall, J., Best, J. L., Baas, J. H. & Al-Musallami, Z., 1 Jan 2000.
  Research output: Contribution to conference › Paper

2018

• How researchers are ensuring that their work has an impact

  Nature Career Feature. Work and motivation of SOS visiting PhD student Melissa Craig and her supervisor Dr Jaco H. Baas highlighted.

  9 Apr 2018

  Links:

  • https://www.nature.com/articles/d41586-018-03925-8
  Activity: Types of Public engagement and outreach - Media article or participation (Contributor)

• Marine Alliance for Science and Technology for Scotland

  (Not started)

• PhD Studentship with StatOil

  01/10/2014 – 31/12/2024 (Finished)

• Realistic Sedimentary Bedform Prediction (COHBED)

  05/01/2012 – 31/08/2016 (Finished)

• Fluid Sediment Interaction In Open-Channels

  01/06/2009 – 15/09/2013 (Finished)

Current

Effect of clay type on sediment gravity flow dynamics. Funded by StatOil. Collaborators: Jaco H. Baas (Bangor), Ian Kane (Manchester), various (Statoil Bergen).

Wave-induced bedform dynamics in mixed cohesive-noncohesive sediments. Funded by 7th Framework Programme, European Union, Hydralab IV. Collaborators: Jaco H. Baas (Bangor), Joris Eggenhuisen, Gerben Ruessink (Utrecht), Matthieu Cartigny (Durham), Peter Thorne, Laurent Amoudry (NOC Liverpool), Dominique Mouaze (Caen).

Silt and very fine sand as main drivers of sediment deposition in submarine fans. Funded by TNA programme of EPOS Multi-Scale Laboratories. Collaborators: Jaco H. Baas, Megan Baker (Bangor), Joris Eggenhuisen (Utrecht), Lorna Strachan (Auckland, New Zealand), David Hodgson (Leeds).

Effect of ‘sticky’ biological polymers on the transport of sand and clay by underwater landslides. Funded by Santander Mobility Award. Collaborators: Jaco H. Baas (Bangor), Rafael Manica, Patricia Buffon (Porto Alegre, Brazil)

Validating a new model for particle suspension using laboratory flume experiments. Funded by Seed Funding Programme of UCD, Ireland. Collaborators: Lawrence Amy (UCD), Jaco H. Baas (Bangor), Rob Dorrell (Hull).

GEOSTICK: Morphodynamic Stickiness. Funded by European Research Council, Brussels. Collaborators: Daniel Parsons (Hull), Jaco H. Baas, Jonathan Malarkey (Bangor).

Turbulent-laminar transitions in flows laden with cohesive sediment. Funded by Turbidite Research Group, Leeds. Collaborators: Robert Dorrell (Durham), Daniel Parsons (Hull), Jaco H. Baas (Bangor), Bill McCaffrey (Leeds).

Completed

Experimental cohesive sediment gravity flows and their deposits. Funded by Universidade FRGS, Porto Alegre, Brazil. Collaborators: Jaco H. Baas (Bangor), Rafael Manica (Porto Alegre).

Realistic sedimentary bedform prediction: Incorporating physical and biological cohesion (COHBED). Funded by NERC. Collaborators: Jaco H. Baas, Alan Davies, Jonathan Malarkey (Bangor), Peter Thorne (NOC Liverpool), Sarah Bass, Andrew Manning, Robert Schindler (Plymouth), Daniel Parsons (Hull), David Paterson (USTAN), Jeff Peakall (Leeds). 

The role of estuarine sediments as a reservoir for pathogenic micro-organisms. Funded by Welsh Water. Collaborators: Shelagh Malham, Colin Jago, Jaco H. Baas (Bangor)

Intrabed turbidity currents. Funded by Universidade FRGS, Porto Alegre, Brazil. Collaborators: Jaco H. Baas (Bangor), Rafael Manica (Porto Alegre).

Framework for Ria Formosa water quality, aquaculture and resource development. Funded by 7th Framework Programme, European Union, COEXIST. Collaborators: various (Lisbon), Jaco H. Baas (Bangor).

Impacts of hydrological variability on material transfers through the river-estuary transition zone (RETZ). Funded by NERC. Collaborators: Colin Jago, Jaco H. Baas, Hilary Kennedy, Simon Neill (Bangor).

The environmental application of field-based ultrasonic Doppler velocimetry in sandy and muddy estuaries. Funded by CCCR. Collaborators: Colin Jago, Jaco H. Baas (Bangor).

Field observation and modelling of the sediment triad (FORMOST). Funded by NERC. Collaborators: Alan Davies, Jaco H. Baas, Colin Jago (Bangor), Laurent Amoudry, Alex Souza, Peter Thorne, Judith Wolfe (NOC Liverpool).