Dr Robert Thomas' Outputs (29)

Hydro-geomorphological modelling of leaky wooden dam efficacy from reach to catchment scale with CAESAR-Lisflood 1.9j (2025)
Journal Article
Wolstenholme, J. M., Skinner, C. J., Milan, D., Thomas, R. E., & Parsons, D. R. (2025). Hydro-geomorphological modelling of leaky wooden dam efficacy from reach to catchment scale with CAESAR-Lisflood 1.9j. Geoscientific Model Development, 18(5), 1395-1411. https://doi.org/10.5194/gmd-18-1395-2025

Leaky wooden dams (LDs) are woody structures installed in headwater streams that aim to reduce downstream flood risk through increasing in-channel roughness and decreasing river longitudinal connectivity in order to desynchronise flood peaks within c... Read More about Hydro-geomorphological modelling of leaky wooden dam efficacy from reach to catchment scale with CAESAR-Lisflood 1.9j.

Automated identification of hedgerows and hedgerow gaps using deep learning Remote Sensing in Ecology and Conservation (2025)
Journal Article
Wolstenholme, J. M., Cooper, F., Thomas, R. E., Ahmed, J., Parsons, K. J., Parsons, K. J., & Parsons, D. R. (online). Automated identification of hedgerows and hedgerow gaps using deep learning Remote Sensing in Ecology and Conservation. Remote Sensing in Ecology and Conservation, https://doi.org/10.1002/rse2.432

Hedgerows are a key component of the UK landscape that form boundaries, borders and limits of land whilst providing vital landscape-scale ecological connectivity for a range of organisms. They are diverse habitats in the agricultural landscape provid... Read More about Automated identification of hedgerows and hedgerow gaps using deep learning Remote Sensing in Ecology and Conservation.

Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings (2023)
Journal Article
Carter, L. J., Wright, R. M., Thomas, R. E., Reeds, J., Murphy, L. A., Collier, S. J., Evans, O., Baktoft, H., & Bolland, J. D. (2023). Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings. Journal of environmental management, 347, Article 119143. https://doi.org/10.1016/j.jenvman.2023.119143

Catadromous European eel (Anguilla anguilla) are a critically endangered fish species due in part to in-river anthropogenic barriers (e.g., pumping stations, weirs, hydropower facilities). European legislation stipulates that safe downstream passage... Read More about Timing is everything; operational changes at a pumping station with a gravity sluice to provide safe downstream passage for silver European eels and deliver considerable financial savings.

Monitoring & modelling fluvial hydrogeomorphic response to leaky wooden dams (2023)
Thesis
Wolstenholme, J. M. Monitoring & modelling fluvial hydrogeomorphic response to leaky wooden dams. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4436310

The introduction of large wood to fluvial systems is an increasingly popular method of natural flood management (NFM). Leaky dams (LDs) are designed to attenuate the hydrograph and ‘slow-the-flow’, intercepting high flows, and providing temporary sto... Read More about Monitoring & modelling fluvial hydrogeomorphic response to leaky wooden dams.

The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage (2023)
Journal Article
Carter, L. J., Collier, S. J., Thomas, R. E., Norman, J., Wright, R. M., & Bolland, J. D. (2023). The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage. Ecological engineering, 192, Article 106972. https://doi.org/10.1016/j.ecoleng.2023.106972

The European eel (Anguilla anguilla) is a critically endangered catadromous fish. The decline has partly been attributed to water management infrastructure that abstract water from rivers for potable and industrial water supply, irrigation, hydroelec... Read More about The influence of passive wedge-wire screen aperture and flow velocity on juvenile European eel exclusion, impingement and passage.

Mixing in density- and viscosity-stratified flows (2022)
Journal Article
Allen, P. A., Dorrell, R. M., Harlen, O. G., Thomas, R. E., & McCaffrey, W. D. (2022). Mixing in density- and viscosity-stratified flows. Physics of Fluids, 34(9), Article 096605. https://doi.org/10.1063/5.0108337

The lock-exchange problem is used extensively to study the flow dynamics of density-driven flows, such as gravity currents, and as a canonical problem to mixing in stratified flows. Opposite halves of a domain are filled with two fluids of different... Read More about Mixing in density- and viscosity-stratified flows.

Testing the public’s response to receiving Severe Flood Warnings using simulated Cell Broadcast (2022)
Data
Smith, K. R., Grant, S., & Thomas, R. E. (2022). Testing the public’s response to receiving Severe Flood Warnings using simulated Cell Broadcast. [Data]

European Governments must implement a public alerting system to reach mobile phone users affected by major emergencies and disasters by June 2022. Cell Broadcast is used to issue emergency alerts in several countries but has not yet been introduced i... Read More about Testing the public’s response to receiving Severe Flood Warnings using simulated Cell Broadcast.

Testing the public’s response to receiving severe flood warnings using simulated cell broadcast (2022)
Journal Article
Smith, K. R., Grant, S., & Thomas, R. E. (2022). Testing the public’s response to receiving severe flood warnings using simulated cell broadcast. Natural hazards, 112, 1611-1631. https://doi.org/10.1007/s11069-022-05241-x

European Governments must implement a public alerting system to reach mobile phone users affected by major emergencies and disasters by June 2022. Cell Broadcast is used to issue emergency alerts in several countries but has not yet been introduced i... Read More about Testing the public’s response to receiving severe flood warnings using simulated cell broadcast.

UK Parliament Environment, Food and Rural Affairs Select Committee Flooding Inquiry: Written Evidence from Dr Kate Smith et al. (FLO0043) (2021)
Report
Smith, K., Thomas, R. E., Skinner, C., Davidson, G., Parsons, D., McLelland, S., Coulthard, T., Malik, K., Harrison, L., Ramsden, S., Moloney, J., Ahmed, J., Carter, C., Wolstenholme, J., Halstead, F., & Betts, P. (2021). UK Parliament Environment, Food and Rural Affairs Select Committee Flooding Inquiry: Written Evidence from Dr Kate Smith et al. (FLO0043)

This submission presents the research conducted within the Energy and Environment Institute at the University of Hull. Our work demonstrates that hazards represented by flooding have multiple dimensions, and that solutions to them need to take these... Read More about UK Parliament Environment, Food and Rural Affairs Select Committee Flooding Inquiry: Written Evidence from Dr Kate Smith et al. (FLO0043).

Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems (2020)
Journal Article
Davarpanah Jazi, S., Wells, M., Peakall, J., Dorrell, R., Thomas, R., Keevil, G., Darby, S., Sommeria, J., Viboud, S., & Valran, T. (2020). Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems. Journal of Geophysical Research: Oceans, 125(3), https://doi.org/10.1029/2019JC015284

Oceanic density currents in many deep-water channels are strongly influenced by the Coriolis force. The dynamics of the bottom-boundary layer in large geostrophic flows, and low Rossby number turbidity currents, are very important for determining the... Read More about Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems.

Individual-based model of juvenile eel movement parametrized with computational fluid dynamics-derived flow fields informs improved fish pass design (2020)
Journal Article
Padgett, T. E., Borman, D. J., Mould, D. C., Padgett, T., Thomas, R. E., Borman, D., & Mould, D. (2020). Individual-based model of juvenile eel movement parametrized with computational fluid dynamics-derived flow fields informs improved fish pass design. Royal Society Open Science, 7(1), Article 191505. https://doi.org/10.1098/rsos.191505

European eel populations have declined markedly in recent decades, caused in part by in-stream barriers, such as weirs and pumping stations, which disrupt the upstream migration of juvenile eels, or elvers, into rivers. Eel passes, narrow sloping cha... Read More about Individual-based model of juvenile eel movement parametrized with computational fluid dynamics-derived flow fields informs improved fish pass design.

Pulse propagation in gravity currents (2020)
Journal Article
Allen, P. A., Dorrell, R. M., Harlen, O. G., Thomas, R. E., & McCaffrey, W. D. (2020). Pulse propagation in gravity currents. Physics of Fluids, 32(1), Article 016603. https://doi.org/10.1063/1.5130576

Real world gravity current flows rarely exist as a single discrete event, but are instead made up of multiple surges. This paper examines the propagation of surges as pulses in gravity currents. Using theoretical shallow-water modeling, we analyze th... Read More about Pulse propagation in gravity currents.

Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication (2019)
Journal Article
Ho, V. L., Dorrell, R. M., Keevil, G. M., Thomas, R. E., Burns, A. D., Baas, J. H., & McCaffrey, W. D. (2019). Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication. Journal of Sedimentary Research, 8(11), 1127-1139. https://doi.org/10.2110/jsr.2019.62

Copyright © 2019, SEPM (Society for Sedimentary Geology) Previous studies on dilute, multi-pulsed, subaqueous saline flows have demonstrated that pulses will inevitably advect forwards to merge with the flow front. On the assumption that pulse mergin... Read More about Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication.

Reply to Discussion on ‘Tectonic and environmental controls on Palaeozoic fluvial environments: Reassessing the impacts of early land plants on sedimentation’ Journal of the Geological Society, London, https://doi.org/10.1144/jgs2016-063 (2017)
Journal Article
Santos, M. G., Mountney, N. P., Peakall, J., Thomas, R. E., Wignall, P. B., & Hodgson, D. M. (2017). Reply to Discussion on ‘Tectonic and environmental controls on Palaeozoic fluvial environments: Reassessing the impacts of early land plants on sedimentation’ Journal of the Geological Society, London, https://doi.org/10.1144/jgs2016-063. Journal of the Geological Society, 174(5), 950-952. https://doi.org/10.1144/jgs2017-031

We thank Davies et al. (2017) for their comments and welcome the opportunity to further discuss the role of early land plants in fluvial environments. Critically, Davies et al. (2017) note that although testable hypotheses exist for the possible role... Read More about Reply to Discussion on ‘Tectonic and environmental controls on Palaeozoic fluvial environments: Reassessing the impacts of early land plants on sedimentation’ Journal of the Geological Society, London, https://doi.org/10.1144/jgs2016-063.

Bias in mean velocities and noise in variances and covariances measured using a multistatic acoustic profiler: the Nortek Vectrino Profiler (2017)
Journal Article
Creelle, S., Thomas, R. E., Schindfessel, L., McLelland, S. J., Creëlle, S., & De Mulder, T. (2017). Bias in mean velocities and noise in variances and covariances measured using a multistatic acoustic profiler: the Nortek Vectrino Profiler. Measurement Science and Technology, 28(7), 075302. https://doi.org/10.1088/1361-6501/aa7273

This paper compiles the technical characteristics and operating principles of the Nortek Vectrino Profiler and reviews previously reported user experiences. A series of experiments are then presented that investigate instrument behaviour and performa... Read More about Bias in mean velocities and noise in variances and covariances measured using a multistatic acoustic profiler: the Nortek Vectrino Profiler.

Rainfall-runoff properties of tephra: simulated effects of grain-size and antecedent rainfall (2017)
Journal Article
Jones, R., Thomas, R. E., Peakall, J., & Manville, V. (2017). Rainfall-runoff properties of tephra: simulated effects of grain-size and antecedent rainfall. Geomorphology, 282, 39-51. https://doi.org/10.1016/j.geomorph.2016.12.023

Rain-triggered lahars (RTLs) are a significant and often persistent secondary volcanic hazard at many volcanoes around the world. Rainfall on unconsolidated volcaniclastic material is the primary initiation mechanism of RTLs: the resultant flows have... Read More about Rainfall-runoff properties of tephra: simulated effects of grain-size and antecedent rainfall.

Erratum to “Geometrical and mechanical properties of four species of northern European brown macroalgae” [Coast. Eng. 84 (2014) 73–80] (2016)
Journal Article
Henry, P. Y., Paul, M., & Thomas, R. (2017). Erratum to “Geometrical and mechanical properties of four species of northern European brown macroalgae” [Coast. Eng. 84 (2014) 73–80]. Coastal Engineering, 120, 36-37. https://doi.org/10.1016/j.coastaleng.2016.11.002

© 2016 This erratum concerns Eq. (1) used in Paul et al. [3] which is the same as Eq. (1) in Paul and Henry [4]. A three-point bending test with clamped ends was performed on macroalga blade samples. As suggested in Fig. 1, this mechanical test was c... Read More about Erratum to “Geometrical and mechanical properties of four species of northern European brown macroalgae” [Coast. Eng. 84 (2014) 73–80].

A combined field, laboratory and numerical study of the forces applied to, and the potential for removal of, bar top vegetation in a braided river (2016)
Journal Article
Bankhead, N. L., Thomas, R. E., & Simon, A. (2017). A combined field, laboratory and numerical study of the forces applied to, and the potential for removal of, bar top vegetation in a braided river. Earth surface processes and landforms : the journal of the British Geomorphological Research Group, 42(3), 439-459. https://doi.org/10.1002/esp.3997

Vegetation can have an important role in controlling channel planform, through its effects on channel roughness, and root-reinforcement of bank and bar materials. Along the Platte River in central Nebraska, USA, The Platte River Recovery Implementati... Read More about A combined field, laboratory and numerical study of the forces applied to, and the potential for removal of, bar top vegetation in a braided river.

The impact of macroalgae on mean and turbulent flow fields (2015)
Journal Article
Thomas, R. E., & Mclelland, S. J. (2015). The impact of macroalgae on mean and turbulent flow fields. Journal of hydrodynamics. Ser. B, 27(3), 427-435. https://doi.org/10.1016/S1001-6058%2815%2960500-5

© 2015 Publishing House for Journal of Hydrodynamics. In this paper, we attempt to quantify the mean and turbulent flow fields around live macroalgae within a tidal inlet in Norway. Two Laminaria digitata specimens ∼0.50m apart were selected for deta... Read More about The impact of macroalgae on mean and turbulent flow fields.

Modeling of multilayer cohesive bank erosion with a coupled bank stability and mobile-bed model (2014)
Journal Article
Lai, Y. G., Thomas, R. E., Ozeren, Y., Simon, A., Greimann, B. P., & Wu, K. (2015). Modeling of multilayer cohesive bank erosion with a coupled bank stability and mobile-bed model. Geomorphology, 243, 116-129. https://doi.org/10.1016/j.geomorph.2014.07.017

Streambank erosion can be an important form of channel change in unstable alluvial environments. It should be accounted for in geomorphic studies, river restoration, dam removal, and channel maintenance projects. Recently, one-dimensional and two-dim... Read More about Modeling of multilayer cohesive bank erosion with a coupled bank stability and mobile-bed model.