Professor Ian Guymer
Department of Civil and Structural Engineering
Professor of Civil Engineering
+44 114 222 5740
Full contact details
Department of Civil and Structural Engineering
Sir Frederick Mappin Building (Broad Lane Building)
My research helps manage the water environment, by describing how pollutants mix in water.
Professor Ian Guymer
Ian graduated in 1981 from Loughborough University of Technology in Civil Engineering. He did his PhD at the University of Birmingham, graduating in 1985, on aspects of solute mixing processes in well-mixed estuaries.
His first academic appointment was as at Heriot-Watt University, Edinburgh, followed by an appointment to the lecturing staff within our Department in 1990, where, alongside Professor Adrian Saul, he helped to set up our postgraduate Water MSc courses and the Water research group.
In January 2005, he was appointed Professor of Civil Engineering at the University of Warwick. He returned to Sheffield in 2018 with EPSRC Established Career Fellowship funding. Ian is Sheffield born and bred and for the majority of his life, has lived in his home city.
- Research interests
Ian's research interests centre around the mixing and transport of contaminants and pollutants in coastal and estuarine areas, rivers, urban drainage and most recently, pipe distribution systems. His work aims to identify and quantify the transport and mixing processes within areas of civil engineering hydraulics.
This is achieved by conducting laboratory and field studies, then developing simplified modelling procedures for engineering applications.
Research projects have investigated the mixing processes in urban drainage and treatment systems, looking at specific components, such as manholes and combined sewer overflow structures, wetlands and ponds, river systems, quantifying dispersion effects due to topographic variations, estuarine studies and coastal mixing processes. These topics are particularly important for modelling water quality processes.
He has been funded to undertake research studies on UK national hydraulic facilities, the Flood Channel and the Coastal Research Facility, formerly situated at HR Ltd., Wallingford and major European research laboratory facilities at DHI and Delft.
In recent years, fundamental research has been funded by EPSRC, NERC, and the EU, with applied research funded by Unilever, Water utilities, the Environment Agency and Highways England (formerly the Highways Agency).
- Quantifying mixing in sewer networks for source localization. Journal of Environmental Engineering, 149(5).
- Longitudinal dispersion affected by willow patches of low areal coverage. Hydrological Processes, 36(6).
- The impact of cylinder diameter distribution on longitudinal and transverse dispersion within random cylinder arrays. Water Resources Research, 58(4).
- Predicting manhole mixing using a compartmental model. Journal of Hydraulic Engineering, 147(12).
- Longitudinal Dispersion in Unsteady Pipe Flows. Journal of Hydraulic Engineering, 147(9), 04021033-04021033. View this article in WRRO
- Unifying advective and diffusive descriptions of bedform pumping in the benthic biolayer of streams. Water Resources Research, 56(11).
- A One‐Dimensional Model for Turbulent Mixing in the Benthic Biolayer of Stream and Coastal Sediments. Water Resources Research, 56(12).
- Optimal sampling of water distribution network dynamics using graph Fourier transform. IEEE Transactions on Network Science and Engineering. View this article in WRRO
- Pore-network modelling of non-Darcy flow through heterogeneous porous media. Advances in Water Resources, 131. View this article in WRRO
- On the potential of on-line free-surface constructed wetlands for attenuating pesticide losses from agricultural land to surface waters. Environmental Chemistry. View this article in WRRO
- A CFD‐Based Mixing Model for Vegetated Flows. Water Resources Research, 55(3), 2322-2347. View this article in WRRO
- A stem spacing‐based non‐dimensional model for predicting longitudinal dispersion in low‐density emergent vegetation. Acta Geophysica. View this article in WRRO
- Estimating drag coefficient for arrays of rigid cylinders representing emergent vegetation. Journal of Hydraulic Research/De Recherches Hydrauliques. View this article in WRRO
- Computational fluid dynamics modelling of residence times in vegetated stormwater ponds. Proceedings of the Institution of Civil Engineers. Water Management.. View this article in WRRO
- A multi-component method to determine pesticides in surface water by liquid-chromatography tandem quadrupole mass spectrometry. Water and Environment Journal, 31(3), 380-387.
- Transverse and longitudinal mixing in real emergent vegetation at low velocities. Water Resources Research, 53(1), 961-978. View this article in WRRO
- Vertical variation of mixing within porous sediment beds below turbulent flows. Water Resources Research, 52(5), 3493-3509. View this article in WRRO
- Residence Time Distributions for Turbulent, Critical, and Laminar Pipe Flow. Journal of Hydraulic Engineering, 142(9). View this article in WRRO
- Deconvolving Smooth Residence Time Distributions from Raw Solute Transport Data. Journal of Hydrologic Engineering, 20(11), 04015022-04015022. View this article in WRRO
- Applications of the concept of river tracer data similarity. Water and Environment Journal, 29(2), 190-201.
- Configuring Maximum Entropy Deconvolution for the Identification of Residence Time Distributions in Solute Transport Applications. Journal of Hydrologic Engineering, 19(7), 1413-1421. View this article in WRRO
- Investigation of centreline strain path during tube penetration using transparent soil and particle image velocimetry. Géotechnique Letters, 3(2), 37-41.
- A practical model to describe temporal variations in total suspended solids concentrations in highway runoff. Acta Geophysica, 61(3), 706-731. View this article in WRRO
- Absence of a Hydraulic Threshold in Small-Diameter Surcharged Manholes. Journal of Hydraulic Engineering, 139(9), 984-994. View this article in WRRO
- Application of analytical solutions in trapezoidal compound channel flow. River Research and Applications, 28(1), 53-61.
- One-Dimensional Mixing Model for Surcharged Manholes. Journal of Hydraulic Engineering, 137(10), 1160-1172.
- Determining longitudinal dispersion coefficients for submerged vegetated flow. Water Resour. Res, 47.
- Bulk Flow Resistance in Vegetated Channels: Analysis of Momentum Balance Approaches Based on Data Obtained in Aging Live Vegetation. Journal of Hydraulic Engineering, 137(12), 1624-1635.
- Physical modelling of deformations around piling augers in clay. Géotechnique, 61(11), 993-999.
- Erratum. Géotechnique, 60(4), 311-312.
- Effects of emergent and submerged natural vegetation on longitudinal mixing in open channel flow. Water Resources Research, 46.
- Physical modelling of pile penetration in clay using transparent soil and particle image velocimetry. Géotechnique, 60(2), 121-132.
- Dimensionless Method to Characterize the Mixing Effects of Surcharged Manholes. Journal of Hydraulic Engineering, 136(5), 318-327.
- The use of deconvolution techniques to identify the fundamental mixing characteristics of urban drainage structures. Water Science and Technology, 61, 2075-2081.
- Residence time study of a hydrodynamic vortex separator applied to predicting disinfection performance. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 223(3), 113-122.
- Assessment of residence time in a hydrodynamic vortex separator by applying distribution models. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 223(3), 179-188.
- Solute Mixing in the Surf Zone. Journal of Waterway, Port, Coastal, and Ocean Engineering, 135(4), 127-134.
- Response to the slug injection of a tracer—a large-scale experiment in a natural river / Réponse à l'injection impulsionnelle d'un traceur—expérience à grande échelle en rivière naturelle. Hydrological Sciences Journal, 53(6), 1300-1309.
- Transverse Mixing in a Trapezoidal Compound Open Channel. Journal of Hydrodynamics, 20(5), 645-649.
- Scaling the solute transport characteristics of a surcharged manhole. Urban Water Journal, 5(1), 33-42.
- The behaviour of linear alkyl benzene sulphonate under direct discharge conditions in Vientiane, Lao PDR. Water Research, 41(20), 4730-4740.
- Importance of advective zone in longitudinal mixing experiments. Acta Geophysica, 55(1), 95-103.
- Application of transient storage modelling to solute transport across a surcharged manhole. Water Science and Technology, 55(4), 65-73.
- Three-Dimensional Simulation of solute transport in a meandering self formed river channel. Journal of Hydraulic Research IAHR, 45, 610-616.
- The Prediction of Solute Transport in Surcharged Manholes using CFD. Water Science and Technology, 55(4), 57-64.
- Longitudinal mixing in meandering channels: New experimental data set and verification of a predictive technique. Water Research, 41, 341-354.
- Diameter and Surcharge Effects on Solute Transport across Surcharged Manholes. Journal of Hydraulic Engineering, 131(4), 312-321.
- On the analysis and prediction of transverse mixing coefficients in natural channels. Journal of Hydraulic Engineering, ASCE, 129, 129-139.
- Correction to “Effect of bed form geometry on the penetration of nonreactive solutes into a stream bed” by A. Marion et al.. Water Resources Research, 39(1).
- Validation of a three-dimensional numerical model using a high spatial resolution data set collected from a meandering channel with natural bed topography. Journal of Hydraulic Engineering, ASCE, 129, 758-768.
- Changes in water quality parameters due to in-sewer processes. Water Science and Technology, 47, 343-350.
- Transverse mixing in sinuous natural open channel flows. Journal of Hydraulic Research, 41(2), 153-165.
- Aggressive flushing for discolouration event mitigation in water distribution networks. Water Science and Technology - Water Supply, 3, 179-186.
- Baseline hydraulic performance of the Heathrow constructed wetlands subsurface flow system. Water Science and Technology, 47, 177-181.
- Monitoring water quality impact due to sediment re-suspension with an in-situ measurement device. Wasser und Boden, 54(12), 39-43.
- Effect of bed form geometry on the penetration of nonreactive solutes into a streambed. Water Resources Research, 38(10).
- Locating outfalls on meandering channels to optimise transverse mixing. Journal of the Chartered Institution of Water and Environmental Management, 16, 194-198.
- Effect of Wave Height on Cross-Shore Solute Mixing. Journal of Waterway, Port, Coastal, and Ocean Engineering, 128(1), 10-20.
- Estimating transverse mixing coefficients. Water and Maritime Engineering, 4, 263-275.
- Relating oxygen demand to flow: development of an in situ sediment oxygen demand measurement device. Water Science and Technology, 43(5), 203-210.
- Solute Retention and Mixing Characteristics in CSO Structures. Urban Drainage Modeling.
- Removal of linear alkylbenzene sulfonate from a small Yorkshire stream: contribution to GREAT-ER project #7. Science of The Total Environment, 251-252, 265-275.
- Longitudinal Dispersion due to Surcharged Manhole. Journal of Hydraulic Engineering, 126(2), 137-149.
- Dissolved-Oxygen/Suspended-Solids Concentration Relationships in the Upper Humber Estuary. Water and Environment Journal, 13(5), 327-337.
- Predicting Dissolved-Oxygen Variations Downstream From An Intermittent Discharge. Water and Environment Journal, 13(4), 301-307.
- Dynamics of the Turbidity Maxima in the Upper Humber Estuary System, UK. Marine Pollution Bulletin, 37(3-7), 190-205.
- Virtual reality - a role in environmental engineering education?. Water Science and Technology, 38(11), 303-310.
- Considering the impact of intermittent discharges when modelling overflows. Water Science and Technology, 38(10), 23-30.
- An investigation of fine sediment mixing within free-flowing and surcharged manholes. Water Science and Technology, 37(1), 215-222.
- Longitudinal Dispersion in Sinuous Channel with Changes in Shape. Journal of Hydraulic Engineering, 124(1), 33-40.
- Small-scale laboratory flowslides. Géotechnique, 47(5), 915-932.
- Representation of solute transport and mixing within a surcharged benched manhole using an aggregated dead zone (ADZ) technique. Water Science and Technology, 34(3-4), 95-101.
- The effects of surcharged manholes on the travel time and dispersion of solutes in sewer systems. Water Science and Technology, 31(7), 51-59.
- The effects of surcharged manholes on the travel time and dispersion of solutes in sewer systems. Water Science and Technology, 31(7).
- Requirements of river water quality models for describing intermittent discharges. River basin management for sustainable development. International conference, Kruger National Park, 1995., 2, 14.
- Evaluation of the aggregated dead zone (ADZ) method as a river catchment management tool applied to the Rivers Aire and Derwent in Yorkshire. 2nd international conference on hydraulic modelling, Stratford-upon-Avon, June 1994, 439-449.
- Evaluation of a random walk model for solute mixing in open channel flow. 2nd international conference on hydraulic modelling, Stratford-upon-Avon, June 1994, 451-460.
- Longitudinal Dispersion Coefficients in Estuary. Journal of Hydraulic Engineering, 118(5), 718-734.
- Field studies of the flow structure in a straight reach of the conwy estuary. Estuarine, Coastal and Shelf Science, 32(6), 581-596.
- A practical engineering approach to modelling longitudinal dispersion.
- The determination of estuarine diffusion coefficients using a fluorimetric dye tracing technique.. ESTUARINE & COASTAL MAR. SCI., 27(3 , Sep. 1988, p.297-310.).
- The determination of estuarine diffusion coefficients using a fluorimetric dye tracing technique. Estuarine, Coastal and Shelf Science, 27(3), 297-310.
- Evaluation of estuarine mixing mechanisms using fluorimetric techniques..
- Solute Dispersion and Sediment Transport in Estuaries. Water Science and Technology, 18(4-5), 93-100.
- Modelling mixing mechanisms. ACADEMIA - The magazine of the Polish Academy of Sciences.
- A new conceptual model of pesticide transfers from agricultural land to surface waters with a specific focus on metaldehyde. Environmental Science: Processes & Impacts, 22(4), 956-972.
- Modelling transverse solute mixing across a vegetation generated shear layer. Journal of Hydraulic Research, 1-16.
- A Genetic Algorithm-Artificial Neural Network Method for the Prediction of Longitudinal Dispersion Coefficient in Rivers, Advancing Artificial Intelligence through Biological Process Applications (pp. 358-374). IGI Global
- Application of a Transient Storage Model to Meandering Channel Studies of Solute Transport and Dispersion, Water Quality Hazards and Dispersion of Pollutants (pp. 85-107). Springer-Verlag
- Modelling Solute Transport Processes in Free Surface Flow CFD Schemes, Computational Fluid Dynamics (pp. 51-69). John Wiley & Sons, Ltd
Conference proceedings papers
- Spatio-Temporal Characterisation Of Hydrodynamics And Mixing Processes In Obstructed Flows Using Optical Techniques. Proceedings of the 39th IAHR World Congress, 19 June 2022 - 24 June 2022.
- On the Use of Surface PIV for the Characterization of Wake Area in Flows Through Emergent Vegetation (pp 43-52)
- EFFECTS OF SEASONAL VARIATION OF VEGETATION ON HYDRAULICRESIDENCE TIME DISTRIBUTIONS IN A STORMWATER POND. 38th IAHR World Congress - "Water: Connecting the World"
- A validated CFD model for estimating residence times in vegetated stormwater ponds. NOVATECH 2019. Lyon, France, 1 July 2019 - 5 July 2019.
- Experimental molecular communications in obstacle rich fluids. Proceedings of the 5th ACM International Conference on Nanoscale Computing and Communication
- A non-dimensional model for longitudinal dispersion in emergent vegetation based on stem-spacing. 5th IAHR Europe Congress. Trento, Italy, 12 June 2018 - 14 June 2018.
- A CFD based comparison of mixing due to regular and random cylinder arrays. GeoPlanet: Earth and Planetary Sciences (pp 195-205) View this article in WRRO
- Transverse mixing coefficient in random cylinder arrays – a CFD validation study. Proceedings of the 37th IAHR Word Congress, 13 August 2017 - 18 August 2017.
- View this article in WRRO Estimating stem-scale mixing coefficients in low velocity flows. Sustainable Hydraulics in the Era of Global Change, 27 July 2016 - 29 July 2016.
- View this article in WRRO QUANTIFYING SOLUTE MIXING AND FLOW FIELDS IN LOW VELOCITY, REAL EMERGENT VEGETATION. 11TH INTERNATIONAL SYMPOSIUM ON ECOHYDRAULICS
- View this article in WRRO COMPUTATIONAL FLUID DYNAMICS MODELLING OF A VEGETATED STORMWATER POND. 11TH INTERNATIONAL SYMPOSIUM ON ECOHYDRAULICS
- Feasibility of the Porous Zone Approach to Modelling Vegetation in CFD (pp 63-75) View this article in WRRO
- Development of a Laboratory System and 2D Routing Analysis to Determine Solute Mixing Within Aquatic Vegetation (pp 49-61) View this article in WRRO
- Analysis of Solute Entrapment and Dispersion in a Meandering Channel, bye Dye Trace and Image Acquisition Techniques. PROCEEDINGS OF THE 35TH IAHR WORLD CONGRESS, VOLS I AND II (pp 5237-5243)
- PHYSICAL MODELLING OF TUBE SAMPLING DISTURBANCE IN CLAYS. PROCEEDINGS OF THE 5TH INTERNATIONAL YOUNG GEOTECHNICAL ENGINEERS' CONFERENCE (IYGEC 2013), Vol. 2 (pp 415-418)
- Correlation Measures for Solute Transport Model Identification and Evaluation (pp 389-401)
- Longitudinal Dispersion Coefficients Within Turbulent and Transitional Pipe Flow (pp 133-145)
- Predicting travel time in natural streams, using a Monte Carlo simulation (pp 283-288)
- Quantifying hyporheic exchange coefficients using the EROSIMESS-system (pp 765-770)
- SOLUTE DISPERSION IN THE NEARSHORE: LABORATORY AND NUMERICAL RESULTS. Coastal Engineering 2008
- LABORATORY INVESTIGATION OF MIXING IN THE NEARSHORE. Coastal Engineering 2006
- Three dimensional modeling of sediment transport in a sharply curved meandering channel. 31st IAHR Congress 2005: Water Engineering for the Future, Choices and Challenges (pp 1659-1664)
- Prediction of storm tank performance using Computational Fluid Dynamics (pp 1509-1514)
- Solute Retention in Storage Tanks. Global Solutions for Urban Drainage
- The Effect of Benching on Longitudinal Dispersion in Surcharged Stepped Manholes. Bridging the Gap
- Locating outfalls on meandering channels to optimise transverse mixing. ENVIRONMENTAL HYDRAULICS AND ECO-HYDRAULICS, THEME B, PROCEEDINGS (pp 42-49)
- Transverse mixing of solute and suspended sediment from a river outfall during over bank flow. ENVIRONMENTAL HYDRAULICS (pp 363-368)
- Vertical mixing processes due to waves and currents. ENVIRONMENTAL HYDRAULICS (pp 387-392)
- Virtual reality — a role in environmental engineering education?. Water Science and Technology, Vol. 38(11)
- An investigation of fine sediment mixing within free-flowing and surcharged manholes. Water Science and Technology, Vol. 37(1)
- Considering the impact of intermittent discharges when modelling overflows. Water Science and Technology, Vol. 38(10)
- Mixing processes due to breaking wave activity in the coastal zone. Coastal Dynamics - Proceedings of the International Conference (pp 197-206)
- Managing water quality in the tidal Ouse (UK), problems associated with suspended sediment oxygen demand. Proceedings, Congress of the International Association of Hydraulic Research, IAHR, Vol. B pt 1 (pp 665-670)
- Use of laser induced fluorescence and video imaging techniques in an investigation of mixing across the dead-zone flow-zone boundary. INTERNATIONAL SEMINAR ON OPTICAL METHODS AND DATA PROCESSING IN HEAT AND FLUID FLOW, Vol. 1996(3) (pp 419-428)
- Mixing processes within open channel flows containing transverse depth variations. HYDRODYNAMICS: THEORY AND APPLICATIONS, VOLS 1 AND 2 (pp 1013-1018)
- Development of an in-situ concentration measurement technique to investigate vertical mixing processes in the coastal zone. HYDRODYNAMICS: THEORY AND APPLICATIONS, VOLS 1 AND 2 (pp 1007-1012)
- Representation of solute transport and mixing within a surcharged benched manhole using an aggregated dead zone (ADZ) technique. Water Science and Technology, Vol. 34(3-4)
- SOLUTE MIXING FROM RIVER OUTFALLS DURING OVER-BANK FLOOD CONDITIONS. ENVIRONMENTAL HYDRAULICS, VOLS 1 AND 2 (pp 447-452)
- EVALUATION OF ESTUARINE MIXING MECHANISMS USING FLUORIMETRIC TECHNIQUES. (pp 337-346)
- View this article in WRRO USE OF DRAG COEFFICIENT TO PREDICT DISPERSION COEFFICIENTS IN EMERGENT VEGETATION AT LOW VELOCITIES. ISE2018
Software / Code
- Temporal Concentration Profiles in Steady and Unsteady Pipe Flow.
- University of Sheffield Experimental Manhole Traces and CRTDs.
- Transverse and Longitudinal Dispersion in Vegetation 2016: Artificial, Carex, Typha.
- Hyporheic Exchange 2012 Dataset.
- Transverse Dispersion in Vegetation across a Shear-layer 2016: Artificial, Carex, Typha.
- Optimal Sampling of Water Distribution Network Dynamics using Graph Fourier Transform, arXiv.
- Unifying Advective and Diffusive Descriptions of Bedform Pumping in the Benthic Biolayer of Streams.
- Vertical Structure and Scaling of Turbulent Mixing in the Benthic Biolayer of Stream and Coastal Sediments, Wiley.
- Turbulent Mixing in the Benthic Biolayer of Streams, Wiley.
- Research group
SuDS (Sustainable Drainage Systems) and Urban Drainage
Water Distribution Systems and Infrastructure
Environmental Fluid Mechanics
Catchments and River Engineering
Modelling Mixing Mechanisms in 1D Water Network Models
Predicting the effects of management strategies requires knowledge of the hydrodynamic processes covering spatial scales of a few millimetres (turbulence) to several hundred kilometres (catchments), with a similarly large range of timescales from milliseconds to weeks.
- Professional activities and memberships
Ian is a Chartered Engineer and a Member of the Chartered Institution of Water and Environmental Management. Ian is currently the Academic-in-Residence for the Institution of Civil Engineers' Shaping the World initiative.
Shaping the World uses the knowledge and experience of civil engineers to help find solutions to some of the world’s most pressing problems.
- Potential PhD offerings
Mixing in Engineered Water Systems – Relating Dispersion to Energy Loss
This project will investigate the effect of changes in cross-sectional shape and unsteady flows on the longitudinal mixing in 1D engineered water systems. It will aim to relate the mechanisms of energy loss to mixing to improve current predictive numerical models of engineered systems.
Solute Mixing in Patchy Vegetated Flows
This proposal aims to extend knowledge by investigating patchy vegetation, looking at discrete patches within a flow and different stem or plant densities within a patch. These will be quantified in a new laboratory facility at the University of Sheffield which will provide unique information on integrating multi-scale processes, quantifying mixing and evaluating appropriate computational fluid dynamics (CFD) tools to enable water engineers and environmental managers to predict water quality changes.