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Flow resistance and hydraulic geometry in bedrock rivers with multiple roughness length scales (2019)
Journal Article
Ferguson, R., Hardy, R., & Hodge, R. (2019). Flow resistance and hydraulic geometry in bedrock rivers with multiple roughness length scales. Earth Surface Processes and Landforms, 44(12), 2437-2449. https://doi.org/10.1002/esp.4673

Many models of incision by bedrock rivers predict water depth and shear stress from discharge; conversely, palaeoflood discharge is sometimes reconstructed from flow depth markers in rock gorges. In both cases assumptions are made about flow resistan... Read More about Flow resistance and hydraulic geometry in bedrock rivers with multiple roughness length scales.

A probabilistic framework for the cover effect in bedrock erosion (2017)
Journal Article
Turowski, J. M., & Hodge, R. (2017). A probabilistic framework for the cover effect in bedrock erosion. Earth Surface Dynamics, 5(2), 311-330. https://doi.org/10.5194/esurf-5-311-2017

The cover effect in fluvial bedrock erosion is a major control on bedrock channel morphology and long-term channel dynamics. Here, we suggest a probabilistic framework for the description of the cover effect that can be applied to field, laboratory,... Read More about A probabilistic framework for the cover effect in bedrock erosion.

Bed load tracer mobility in a mixed bedrock/alluvial channel (2017)
Journal Article
Ferguson, R., Sharma, B., Hodge, R., Hardy, R., & Warburton, J. (2017). Bed load tracer mobility in a mixed bedrock/alluvial channel. Journal of Geophysical Research: Earth Surface, 122(4), 807-822. https://doi.org/10.1002/2016jf003946

The presence of bare or partially-covered rock in an otherwise alluvial river implies a downstream change in transport capacity relative to supply. Field investigations of this change and what causes it are lacking. We used two sets of magnet-tagged... Read More about Bed load tracer mobility in a mixed bedrock/alluvial channel.

Flow resistance and hydraulic geometry in contrasting reaches of a bedrock channel (2017)
Journal Article
Ferguson, R., Sharma, B., Hardy, R., Hodge, R., & Warburton, J. (2017). Flow resistance and hydraulic geometry in contrasting reaches of a bedrock channel. Water Resources Research, 53(3), 2278-2293. https://doi.org/10.1002/2016wr020233

Assumptions about flow resistance in bedrock channels have to be made for mechanistic modeling of river incision, paleoflood estimation, flood routing, and river engineering. Field data on bedrock flow resistance are very limited and calculations gen... Read More about Flow resistance and hydraulic geometry in contrasting reaches of a bedrock channel.

Calculating the explicit probability of entrainment based on inertial acceleration measurements (2016)
Journal Article
Maniatis, G., Hoey, T., Hassan, M., Sventek, J., Hodge, R., Drysdale, T., & Valyrakis, M. (2017). Calculating the explicit probability of entrainment based on inertial acceleration measurements. Journal of Hydraulic Engineering, 143(4), Article 04016097. https://doi.org/10.1061/%28asce%29hy.1943-7900.0001262

A new method for the approximation of the explicit probability of entrainment for individual coarse particles is presented. The method is based on the derivation of inertial acceleration measurements, space-state approximation of the dynamics close t... Read More about Calculating the explicit probability of entrainment based on inertial acceleration measurements.

A Froude-scaled model of a bedrock-alluvial channel reach: 2. Sediment cover (2016)
Journal Article
Hodge, R., & Hoey, T. (2016). A Froude-scaled model of a bedrock-alluvial channel reach: 2. Sediment cover. Journal of Geophysical Research: Earth Surface, 121(9), 1597-1618. https://doi.org/10.1002/2015jf003709

Previous research into sediment cover in bedrock-alluvial channels has focussed on total sediment cover, rather than the spatial distribution of cover within the channel. The latter is important because it determines the bedrock areas that are protec... Read More about A Froude-scaled model of a bedrock-alluvial channel reach: 2. Sediment cover.

A Froude-scaled model of a bedrock-alluvial channel reach: 1. Hydraulics (2016)
Journal Article
Hodge, R., & Hoey, T. (2016). A Froude-scaled model of a bedrock-alluvial channel reach: 1. Hydraulics. Journal of Geophysical Research: Earth Surface, 121(9), 1578-1596. https://doi.org/10.1002/2015jf003706

The controls on hydraulics in bedrock-alluvial rivers are relatively poorly understood, despite the importance of the flow in determining rates and patterns of sediment transport and consequent erosion. To measure hydraulics within a bedrock-alluvial... Read More about A Froude-scaled model of a bedrock-alluvial channel reach: 1. Hydraulics.

Formation and erosion of sediment cover in an experimental bedrock-alluvial channel (2016)
Journal Article
Hodge, R., Hoey, T., Maniatis, G., & Leprêtre, E. (2016). Formation and erosion of sediment cover in an experimental bedrock-alluvial channel. Earth Surface Processes and Landforms, 41(10), 1409-1420. https://doi.org/10.1002/esp.3924

Sediment grains in a bedrock-alluvial river will be deposited within or adjacent to a sediment patch, or as isolated grains on the bedrock surface. Previous analysis of grain geometry has demonstrated that these arrangements produce significant diffe... Read More about Formation and erosion of sediment cover in an experimental bedrock-alluvial channel.

Spatial variations in surface sediment structure in riffle-pool sequences: a preliminary test of the Differential Sediment Entrainment Hypothesis (DSEH) (2013)
Journal Article
Hodge, R., Sear, D., & Leyland, J. (2013). Spatial variations in surface sediment structure in riffle-pool sequences: a preliminary test of the Differential Sediment Entrainment Hypothesis (DSEH). Earth Surface Processes and Landforms, 38(5), 449-465. https://doi.org/10.1002/esp.3290

Riffle–pool sequences are maintained through the preferential entrainment of sediment grains from pools rather than riffles. This preferential entrainment has been attributed to a reversal in the magnitude of velocity and shear stress under high flow... Read More about Spatial variations in surface sediment structure in riffle-pool sequences: a preliminary test of the Differential Sediment Entrainment Hypothesis (DSEH).