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Reconstruction of subgrid scale topographic variability and its effect upon the spatial structure of three dimensional river flow (2010)
Journal Article
Casas, M., Lane, S., Hardy, R., Benito, G., & Whiting, P. (2010). Reconstruction of subgrid scale topographic variability and its effect upon the spatial structure of three dimensional river flow. Water Resources Research, 46(3), Article W03519. https://doi.org/10.1029/2009wr007756

A new approach to describing the associated topography at different scales in computational fluid dynamic applications to gravel bed rivers was developed. Surveyed topographic data were interpolated, using geostatistical methods, into different spati... Read More about Reconstruction of subgrid scale topographic variability and its effect upon the spatial structure of three dimensional river flow.

On the relationship between flow and suspended sediment transport over the crest of a sand dune, Río Paraná, Argentina (2010)
Journal Article
Shugar, D., Kostaschuk, R., Best, J., Parsons, D., Lane, S., Orfeo, O., & Hardy, R. (2010). On the relationship between flow and suspended sediment transport over the crest of a sand dune, Río Paraná, Argentina. Sedimentology, 57(1), 252-272. https://doi.org/10.1111/j.1365-3091.2009.01110.x

The links between large-scale turbulence and the suspension of sediment over alluvial bedforms have generated considerable interest in the last few decades, with past studies illustrating the origin of such turbulence and its influence on flow resist... Read More about On the relationship between flow and suspended sediment transport over the crest of a sand dune, Río Paraná, Argentina.

Coherent flow structures in a depth-limited flow over a gravel surface : the role of near-bed turbulance and influence of Reynolds number (2009)
Journal Article
Hardy, R., Best, J., Lane, S., & Carbonneau, P. (2009). Coherent flow structures in a depth-limited flow over a gravel surface : the role of near-bed turbulance and influence of Reynolds number. Journal of Geophysical Research, 114, Article F01003. https://doi.org/10.1029/2007jf000970

In gravel bed rivers, the microtopography of the bed exerts a significant effect on the generation of turbulent flow structures. Although field and laboratory measurements have indicated that flows over gravel beds contain coherent macroturbulent flo... Read More about Coherent flow structures in a depth-limited flow over a gravel surface : the role of near-bed turbulance and influence of Reynolds number.

Emergence of coherent flow structures over a gravel surface: A numerical experiment (2007)
Journal Article
Hardy, R., Lane, S., Ferguson, R., & Parsons, D. (2007). Emergence of coherent flow structures over a gravel surface: A numerical experiment. Water Resources Research, 43(3), Article W03422. https://doi.org/10.1029/2006wr004936

Gravel bed rivers have complex, porous, and irregular surfaces, characterized by a range of morphological forms. These topographical structures determine the flow structures that develop over the river bed, primarily by the shedding of vortices in th... Read More about Emergence of coherent flow structures over a gravel surface: A numerical experiment.

Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina (2007)
Journal Article
Parsons, D., Best, J., Lane, S., Orfeo, O., Hardy, R., & Kostaschuk, R. (2007). Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina. Earth Surface Processes and Landforms, 32(1), 155-162. https://doi.org/10.1002/esp.1457

Confluence–diffluence units are key elements within many river networks, having a major impact upon the routing of flow and sediment, and hence upon channel change. Although much progress has been made in understanding river confluences, and increasi... Read More about Form roughness and the absence of secondary flow in a large confluence-diffluence, Rio Paraná, Argentina.

Morphology and flow fields of three-dimensional dunes, Rio Paraná, Argentina: Results from simultaneous multibeam echo sounding and acoustic Doppler current profiling. (2005)
Journal Article
Parsons, D., Best, J., Orefo, O., Hardy, R., Kostaschuck, R., & Lane, S. (2005). Morphology and flow fields of three-dimensional dunes, Rio Paraná, Argentina: Results from simultaneous multibeam echo sounding and acoustic Doppler current profiling. Journal of Geophysical Research, 110(4), https://doi.org/10.1029/2004jf000231

Development and testing of a numerical code for treatment of complex river channel topography in three-dimensional CFD models with structured grids (2005)
Journal Article
Hardy, R., Lane, S., Lawless, M., Best, J., Elliott, L., & Ingham, D. (2005). Development and testing of a numerical code for treatment of complex river channel topography in three-dimensional CFD models with structured grids. Journal of Hydraulic Research, 43(5), 468-480

The potential for using high-resolution numerical modelling to understand flow over complex rough heterogeneous surfaces has yet to be fully realized, largely due to problems of designing numerically stable meshes for use with complex bed geometries.... Read More about Development and testing of a numerical code for treatment of complex river channel topography in three-dimensional CFD models with structured grids.

Modelling granular sediment transport over water-worked gravels (2005)
Journal Article
Hardy, R. (2005). Modelling granular sediment transport over water-worked gravels. Earth Surface Processes and Landforms, 30(8), 1069-1076. https://doi.org/10.1002/esp.1277

This paper reports a numerical model that calculates the transport paths of individual granular particles over a natural water-worked gravel surface. Surface topography is measured using digital photogrammetry and incorporated into a computational fl... Read More about Modelling granular sediment transport over water-worked gravels.

Numerical modeling of flow processes over gravelly-surfaces using structured grids and a numerical porosity treatment (2004)
Journal Article
Lane, S., Hardy, R., Ingham, D., & Elliott, L. (2004). Numerical modeling of flow processes over gravelly-surfaces using structured grids and a numerical porosity treatment. Water Resources Research, 40(1), Article W01302. https://doi.org/10.1029/2002wr001934

This article describes the development and validation of a method for representing the complex surface topography of gravel bed rivers in high-resolution three-dimensional computational fluid dynamic models. This is based on a regular structured grid... Read More about Numerical modeling of flow processes over gravelly-surfaces using structured grids and a numerical porosity treatment.

Flow in meander bends with recirculation at the inner bank (2003)
Journal Article
Ferguson, R., Parsons, D., Lane, S., & Hardy, R. (2003). Flow in meander bends with recirculation at the inner bank. Water Resources Research, 39(11), Article 1322. https://doi.org/10.1029/2003wr001965

In highly curved river bends, flow may separate at the inner bank to create a recirculation eddy with weak upstream flow. Very little is known about how recirculation eddies connect with the downstream flow or how the latter is affected by their pres... Read More about Flow in meander bends with recirculation at the inner bank.