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Robert Ferguson's Outputs (43)

Using sediment impact sensors to improve the morphological sediment budget approach for estimating bedload transport rates (2010)
Journal Article
Raven, E., Lane, S., & Ferguson, R. (2010). Using sediment impact sensors to improve the morphological sediment budget approach for estimating bedload transport rates. Geomorphology, 119(1-2), 125-134. https://doi.org/10.1016/j.geomorph.2010.03.012

Constructing a sediment budget from morphological channel change, typically measured using repeat cross-sectional surveys, has proven a useful technique for estimating mean bedload transport rates in gravel-bed rivers. We apply and suggest improvemen... Read More about Using sediment impact sensors to improve the morphological sediment budget approach for estimating bedload transport rates.

The spatial and temporal patterns of aggradation in a temperate, upland, gravel-bed river. (2009)
Journal Article
Raven, E., Lane, S., Ferguson, R., & Bracken, L. (2009). The spatial and temporal patterns of aggradation in a temperate, upland, gravel-bed river. Earth Surface Processes and Landforms, 34(9), 1181-1197. https://doi.org/10.1002/esp.1783

Intensive field monitoring of a reach Of upland gravel-bed river illustrates the temporal and spatial variability of in-channel sedimentation. Over the six-year monitoring period, the mean bed level in the channel has risen by 0.17 m with a maximum b... Read More about The spatial and temporal patterns of aggradation in a temperate, upland, gravel-bed river..

A critical perspective on 1-D modeling of river processes: Gravel load and aggradation in lower Fraser River (2009)
Journal Article
Ferguson, R., & Church, M. (2009). A critical perspective on 1-D modeling of river processes: Gravel load and aggradation in lower Fraser River. Water Resources Research, 45(11), https://doi.org/10.1029/2009wr007740

We investigate how well a width-averaged morphodynamic model can simulate gravel transport and aggradation along a highly irregular 38-km reach of lower Fraser River and discuss critical issues in this type of modeling. Bed load equations with plausi... Read More about A critical perspective on 1-D modeling of river processes: Gravel load and aggradation in lower Fraser River.

A modified morphodynamic model for investigating the response of rivers to short-term climate change (2008)
Journal Article
Verhaar, P., Biron, P. M., Ferguson, R., & Hoey, T. (2008). A modified morphodynamic model for investigating the response of rivers to short-term climate change. Geomorphology, 101(4), 674-682. https://doi.org/10.1016/j.geomorph.2008.03.010

Near-future climate change will affect the discharge and base level of rivers and thus cause channel changes. The nature and pace of such changes can be simulated using morphodynamic models. As part of an investigation of how the changing hydrology o... Read More about A modified morphodynamic model for investigating the response of rivers to short-term climate change.

Flow resistance equations for gravel-and boulder-bed streams (2007)
Journal Article
Ferguson, R. (2007). Flow resistance equations for gravel-and boulder-bed streams. Water Resources Research, 43(5), Article W05427. https://doi.org/10.1029/2006wr005422

Alternative general forms are considered for equations to predict mean velocity over the full range of relative submergence experienced in gravel- and boulder-bed streams. A partial unification is suggested for some previous semiempirical models and... Read More about Flow resistance equations for gravel-and boulder-bed streams.

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.

River system discontinuities due to lateral inputs: generic styles and controls (2006)
Journal Article
Ferguson, R., Cudden, J., Hoey, T., & Rice, S. (2006). River system discontinuities due to lateral inputs: generic styles and controls. Earth Surface Processes and Landforms, 31(9), 1149-1166. https://doi.org/10.1002/esp.1309

In alluvial river systems, lateral inputs of water and/or sediment at junctions or undercut hillsides can disrupt what would otherwise be smooth downstream trends in mainstream bed elevation, channel gradient, and bed grain size. Generic styles of ma... Read More about River system discontinuities due to lateral inputs: generic styles and controls.

The missing dimension: effects of lateral variation on 1-D calculations of fluvial bedload transport (2003)
Journal Article
Ferguson, R. (2003). The missing dimension: effects of lateral variation on 1-D calculations of fluvial bedload transport. Geomorphology, 56(1-2), 1-14. https://doi.org/10.1016/s0169-555x%2803%2900042-4

Most calculations of bedload transport in rivers, including those in numerical models of aggradation and degradation, are 1-D: all hydraulic and transport-rate calculations are averaged over the channel width. Because bedload transport laws are nonli... Read More about The missing dimension: effects of lateral variation on 1-D calculations of fluvial bedload transport.

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.

Assessing the credibility of a series of computational fluid dynamic simulations of open channel flow (2003)
Journal Article
Hardy, R., Lane, S., Ferguson, R., & Parsons, D. (2003). Assessing the credibility of a series of computational fluid dynamic simulations of open channel flow. Hydrological Processes, 17(8), 1539-1560. https://doi.org/10.1002/hyp.1198

Recent developments in numerical algorithms have enabled the construction of three-dimensional models for the prediction of flows in open channels. These advances encompass improvements in both numerical solutions and the process representation requi... Read More about Assessing the credibility of a series of computational fluid dynamic simulations of open channel flow.

Emergence of abrupt gravel to sand transitions along rivers through sorting processes (2003)
Journal Article
Ferguson, R. (2003). Emergence of abrupt gravel to sand transitions along rivers through sorting processes. Geology, 31(2), 159-162. https://doi.org/10.1130/0091-7613%282003%29031%3C0159%3Aeoagts%3E2.0.co%3B2

Gradual downstream fining along gravel-bed rivers is often followed by a relatively abrupt change to a sand bed. This has usually been explained by the breakdown of pebbles of certain lithologies to sand, but it is not restricted to particular rock t... Read More about Emergence of abrupt gravel to sand transitions along rivers through sorting processes.