A5068566964- Hydrology and Sediment Transport Processes
- Geological formations and processes
- Soil erosion and sediment transport
- Aeolian processes and effects
- Geology and Paleoclimatology Research
- Hydrology and Watershed Management Studies
- Hydrocarbon exploration and reservoir analysis
- Flood Risk Assessment and Management
- Fluid Dynamics and Turbulent Flows
- Landslides and related hazards
- Computer Graphics and Visualization Techniques
- CO2 Sequestration and Geologic Interactions
- Geophysical Methods and Applications
- Enhanced Oil Recovery Techniques
- Hydraulic flow and structures
- Geography and Environmental Studies
- Coastal and Marine Dynamics
- Mathematical Dynamics and Fractals
- Geotechnical and Geomechanical Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Traffic control and management
- Paleontology and Stratigraphy of Fossils
- 3D Surveying and Cultural Heritage
Loughborough University
2023-2024
University of Hull
2012-2022
University of Illinois Urbana-Champaign
2017-2020
University of Southampton
2015-2020
East Sussex County Council
2018-2019
University of Brighton
2009-2018
University of Birmingham
2009-2015
Binghamton University
2007
Abstract The depositional stratigraphy of within‐channel deposits in sandy braided rivers is dominated by a variety barforms (both singular ‘unit’ bars and complex ‘compound’ bars), as well the infill individual channels (herein termed ‘channel fills’). channel fills define key components facies models for their heterogeneity, knowledge which important reservoir characterization. However, few studies have sought to address question whether can be readily differentiated from each other. This...
Understanding sedimentary preservation underpins our ability to interpret the ancient record and reconstruct paleoenvironments paleoclimates. Dune sets are ubiquitous in preserved river deposits typically interpreted based on a model that describes recurrence of erosion vertical sequence, but without considering spatial variability. However, variability flow sediment transport will change erosion, therefore dune preservation. In order better understand limits these interpretations outline...
Abstract To date, published studies of alluvial bar architecture in large rivers have been restricted mostly to case individual bars and single locations. Relatively little is known about how the depositional processes sedimentary kilometre‐scale vary within a multi‐kilometre reach or over several hundreds kilometres downstream. This study presents Ground Penetrating Radar core data from 11, Río Paraná, Argentina. The investigated are located between 30 km upstream 540 downstream Paraná –...
Unit-bar deposits are ubiquitous components of river-channel and strongly influence their hydrological properties, yet they not easy to interpret.This paper concerns details the internal structures six unit bars from South Saskatchewan River, Canada, that were investigated using trenches, epoxy resin peels, 900 MHz ground-penetrating radar (GPR) profiles.The composition depends on flow unsteadiness superimposed bedforms.Flow causes changes in mean grain size sediment transport, but is...
We illustrate the potential for using physics-based modeling to link alluvial stratigraphy large river morphology and dynamics. Model simulations, validated ground penetrating radar data from Río Paraná, Argentina, demonstrate a strong relationship between bar-scale set thickness channel depth, which applies across wide range of patterns bar types. show that hydrologic regime, indexed by discharge variability flood duration, exerts first-order influence on morphodynamics hence thickness,...
Abstract Most past experimental investigations of flow over river dunes have focused on conditions that match semiempirical flow‐depth scaling laws, yet such equilibrium are limited value because they rarely occur in natural channels. This paper quantifies the structure mean and turbulent fixed 2‐D laboratory across a range nonequilibrium within dune regime. The field was quantified using particle imaging velocimetry for 12 conditions, including flows too deep, shallow, fast, or slow size...
Abstract Fluvial cross strata are depositional products of bedform migration that record formative flow and sediment transport conditions on planetary bodies. Bedform evolution varies with stage even under constant depths, but our understanding how prevailing affect preserved is limited. Here, we analyzed experimental set thickness spanning threshold‐of‐motion to suspension‐dominated at multiple equilibrium depths. Results show trough depth mean have a parabolic dependence stage, maximum...
Recent technological advances in remote sensing have enabled investigation of the morphodynamics and hydrodynamics large rivers. However, measuring topography flow these very rivers is time consuming thus often constrains spatial resolution reach‐length scales that can be monitored. Similar constraints exist for computational fluid dynamics (CFD) studies rivers, requiring maximization mesh‐ or grid‐cell dimensions implying a reduction representation bedform‐roughness elements are order model...
ABSTRACT Strata produced by fluvial dunes can provide insight into the hydrological regime of ancient rivers. Recent experiments indicate that conditions disequilibrium between bedforms and formative flows may be inferred from coefficient variation preserved dune cross‐set thickness, suggesting this quantity act as a proxy for flashiness river floods relative to time required full bedform translation. To assess whether idea is applicable interpretations stratigraphic record, study examines...
Abstract Fluvial cross strata are fundamental sedimentary structures that record past flow and sediment transport conditions. Bedform preservation can be significantly influenced by the presence of larger‐scale topographic features cause spatial gradients in flow. However, our understanding controls on a morphodynamic hierarchy is limited. Here, using high‐resolution bathymetry from physical experiment, we quantify bedform evolution zone expansion deceleration. Results show size celerity...
Abstract River deposits are rich in sedimentological patterns that determine their petrophysical properties and industrial value (e.g. hydrocarbon reservoirs aquifers), as well providing each deposit with individual characteristics. Great variability characteristics exists modern river systems; behaviour is expected to further diverge under environmental climate change scenarios, much greater variation when we consider all of geological time. In view this diversity patterns, a series...
The time-averaged and instantaneous flow velocity structures of flood waters are not well understood for irregular surfaces such as created by the presence roots fallen branches on forested floodplains. Natural commonly depart systematically from those described idealised roughness elements, an important knowledge gap exists surrounding effects natural vertical exchanges fluid momentum. An improved understanding structure is required to model flows over floodplains more accurately,...
ABSTRACT The Cambrian Mount Simon Sandstone has been the subject of extensive study and multiple industrial-scale carbon storage demonstrations at Decatur, Illinois, USA. development a reliable paleoenvironmental model is critical to successful large-scale dioxide (CO2) storage, but complicated by need interpret pre-vegetation sedimentation processes. present presents Lower Sandstone, based on analysis primary sedimentary structures in two cores four complete high-resolution resistivity logs...