Articles | Volume 12, issue 1
https://doi.org/10.5194/esurf-12-367-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-12-367-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Feb 2024
Research article |
| 15 Feb 2024
| 15 Feb 2024
Dimensionless argument: a narrow grain size range near 2 mm plays a special role in river sediment transport and morphodynamics
Department of Earth Science and Environmental Change, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
Chenge An
State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China
Michael P. Lamb
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
Marcelo H. Garcia
Department of Civil and Environmental Engineering, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
Elizabeth H. Dingle
Department of Geography, Durham University, South Road, Durham, DH1 3LE, UK
Jeremy G. Venditti
School of Environmental Science and Geography, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
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We present a set of observations from laboratory experiments on meltwater meandering rivulets on ice and compare them (qualitatively and quantitatively) to patterns commonly found in meandering channels flowing over different materials. Our channels display great similarities with real rivers in spite of being much smaller. Higher temperature differences between water and ice create deeper and less sinuous channels with bends that preferentially point downstream and are not as rounded.
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In most models of river morphodynamics, sediment mass conservation is described by the Exner equation, which may take either the flux form or the entrainment form. Here we compare the two forms of the Exner equation under conditions typical of the lower Yellow River. We find that when using a single sediment grain size, there is little difference between the two forms. But when considering sediment mixtures, the two forms will show very different patterns of grain sorting.
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Chenge An, Marwan A. Hassan, Carles Ferrer-Boix, and Xudong Fu
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Roberto Fernández and Gary Parker
Earth Surf. Dynam., 9, 253–269, https://doi.org/10.5194/esurf-9-253-2021, https://doi.org/10.5194/esurf-9-253-2021, 2021
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Jan de Leeuw, Michael P. Lamb, Gary Parker, Andrew J. Moodie, Daniel Haught, Jeremy G. Venditti, and Jeffrey A. Nittrouer
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Sheng Ye, Qihua Ran, Xudong Fu, Chunhong Hu, Guangqian Wang, Gary Parker, Xiuxiu Chen, and Siwei Zhang
Hydrol. Earth Syst. Sci., 23, 549–556, https://doi.org/10.5194/hess-23-549-2019, https://doi.org/10.5194/hess-23-549-2019, 2019
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Chenge An, Andrew J. Moodie, Hongbo Ma, Xudong Fu, Yuanfeng Zhang, Kensuke Naito, and Gary Parker
Earth Surf. Dynam., 6, 989–1010, https://doi.org/10.5194/esurf-6-989-2018, https://doi.org/10.5194/esurf-6-989-2018, 2018
Short summary
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In most models of river morphodynamics, sediment mass conservation is described by the Exner equation, which may take either the flux form or the entrainment form. Here we compare the two forms of the Exner equation under conditions typical of the lower Yellow River. We find that when using a single sediment grain size, there is little difference between the two forms. But when considering sediment mixtures, the two forms will show very different patterns of grain sorting.
Elizabeth H. Dingle, Hugh D. Sinclair, Mikaël Attal, Ángel Rodés, and Vimal Singh
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We present 18 new cosmogenic radionuclide samples collected from modern river sand and dated Holocene terrace and floodplain deposits from the Ganga River at the Himalayan mountain front, which display a notable degree of temporal variability. This variability is explored using field observations and numerical and statistical analysis. We propose that the observed variability is driven by the nature of stochastic inputs of sediment and the evacuation timescales of individual sediment deposits.
Jeffrey S. Kwang and Gary Parker
Earth Surf. Dynam., 5, 807–820, https://doi.org/10.5194/esurf-5-807-2017, https://doi.org/10.5194/esurf-5-807-2017, 2017
Short summary
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A prevalent bedrock incision relation used in landscape evolution is the stream power incision model (SPIM), which relates incision rate to drainage area to the m power and slope to the n power. We show the most commonly used ratio, m ∕ n = 0.5, leads to scale invariance: a landscape that has a horizontal domain of 1 km × 1 km has exactly the same relief pattern as one with a 100 km × 100 km domain. This conclusion indicates that SPIM must yield unrealistic results over a wide range of conditions.
L. Zhang, G. Parker, C. P. Stark, T. Inoue, E. Viparelli, X. Fu, and N. Izumi
Earth Surf. Dynam., 3, 113–138, https://doi.org/10.5194/esurf-3-113-2015, https://doi.org/10.5194/esurf-3-113-2015, 2015
Short summary
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The saltation-abrasion model captures bedrock incision due stones striking bedrock. We present the Macro-Roughness-based Saltation-Abrasion-Alluviation (MRSAA) model, which tracks spatiotemporal variation of both bedload and alluvial thickness. It captures migrating waves of incision upstream and alluviation downstream. We apply it to incision problems not captured by saltation-abrasion, including the response to alluviation and stripping, and a simplified graben with uplift and subsidence.
S. Dutta, M. I. Cantero, and M. H. Garcia
Earth Surf. Dynam., 2, 419–431, https://doi.org/10.5194/esurf-2-419-2014, https://doi.org/10.5194/esurf-2-419-2014, 2014
A. Pelosi and G. Parker
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Earth Surf. Dynam., 12, 581–599, https://doi.org/10.5194/esurf-12-581-2024, https://doi.org/10.5194/esurf-12-581-2024, 2024
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Moritz Altmann, Madlene Pfeiffer, Florian Haas, Jakob Rom, Fabian Fleischer, Tobias Heckmann, Livia Piermattei, Michael Wimmer, Lukas Braun, Manuel Stark, Sarah Betz-Nutz, and Michael Becht
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Paul A. Carling
Earth Surf. Dynam., 12, 381–397, https://doi.org/10.5194/esurf-12-381-2024, https://doi.org/10.5194/esurf-12-381-2024, 2024
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Edge rounding in Shap granite glacial erratics is an irregular function of distance from the source outcrop in northern England, UK. Block shape is conservative, evolving according to block fracture mechanics – stochastic and silver ratio models – towards either of two attractor states. Progressive reduction in size occurs for blocks transported at the sole of the ice mass where the blocks are subject to compressive and tensile forces of the ice acting against a bedrock or till surface.
Lindsay Marie Capito, Enrico Pandrin, Walter Bertoldi, Nicola Surian, and Simone Bizzi
Earth Surf. Dynam., 12, 321–345, https://doi.org/10.5194/esurf-12-321-2024, https://doi.org/10.5194/esurf-12-321-2024, 2024
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We propose that the pattern of erosion and deposition from repeat topographic surveys can be a proxy for path length in gravel-bed rivers. With laboratory and field data, we applied tools from signal processing to quantify this periodicity and used these path length estimates to calculate sediment transport using the morphological method. Our results highlight the potential to expand the use of the morphological method using only remotely sensed data as well as its limitations.
Xuxu Wu, Jonathan Malarkey, Roberto Fernández, Jaco H. Baas, Ellen Pollard, and Daniel R. Parsons
Earth Surf. Dynam., 12, 231–247, https://doi.org/10.5194/esurf-12-231-2024, https://doi.org/10.5194/esurf-12-231-2024, 2024
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The seabed changes from flat to rippled in response to the frictional influence of waves and currents. This experimental study has shown that the speed of this change, the size of ripples that result and even whether ripples appear also depend on the amount of sticky mud present. This new classification on the basis of initial mud content should lead to improvements in models of seabed change in present environments by engineers and the interpretation of past environments by geologists.
Andrea D'Alpaos, Davide Tognin, Laura Tommasini, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 181–199, https://doi.org/10.5194/esurf-12-181-2024, https://doi.org/10.5194/esurf-12-181-2024, 2024
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Sediment erosion induced by wind waves is one of the main drivers of the morphological evolution of shallow tidal environments. However, a reliable description of erosion events for the long-term morphodynamic modelling of tidal systems is still lacking. By statistically characterizing sediment erosion dynamics in the Venice Lagoon over the last 4 centuries, we set up a novel framework for a synthetic, yet reliable, description of erosion events in tidal systems.
Davide Tognin, Andrea D'Alpaos, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 201–218, https://doi.org/10.5194/esurf-12-201-2024, https://doi.org/10.5194/esurf-12-201-2024, 2024
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Reliable quantification of sediment transport processes is necessary to understand the fate of shallow tidal environments. Here we present a framework for the description of suspended sediment dynamics to quantify deposition in the long-term modelling of shallow tidal systems. This characterization, together with that of erosion events, allows one to set up synthetic, yet reliable, models for the long-term evolution of tidal landscapes.
Emma L. S. Graf, Hugh D. Sinclair, Mikaël Attal, Boris Gailleton, Basanta Raj Adhikari, and Bishnu Raj Baral
Earth Surf. Dynam., 12, 135–161, https://doi.org/10.5194/esurf-12-135-2024, https://doi.org/10.5194/esurf-12-135-2024, 2024
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Using satellite images, we show that, unlike other examples of earthquake-affected rivers, the rivers of central Nepal experienced little increase in sedimentation following the 2015 Gorkha earthquake. Instead, a catastrophic flood occurred in 2021 that buried towns and agricultural land under up to 10 m of sediment. We show that intense storms remobilised glacial sediment from high elevations causing much a greater impact than flushing of earthquake-induced landslides.
Mohamad Nasr, Adele Johannot, Thomas Geay, Sebastien Zanker, Jules Le Guern, and Alain Recking
Earth Surf. Dynam., 12, 117–134, https://doi.org/10.5194/esurf-12-117-2024, https://doi.org/10.5194/esurf-12-117-2024, 2024
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Hydrophones are used to monitor sediment transport in the river by listening to the acoustic noise generated by particle impacts on the riverbed. However, this acoustic noise is modified by the river flow and can cause misleading information about sediment transport. This article proposes a model that corrects the measured acoustic signal. Testing the model showed that the corrected signal is better correlated with bedload flux in the river.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 105–115, https://doi.org/10.5194/esurf-12-105-2024, https://doi.org/10.5194/esurf-12-105-2024, 2024
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We provide a detailed characterization of the frequency, intensity and duration of flooding events at a site along the Texas coast. Our analysis demonstrates the suitability of relatively simple wave run-up models to estimate the frequency and intensity of coastal flooding. Our results validate and expand a probabilistic model of coastal flooding driven by wave run-up that can then be used in coastal risk management in response to sea level rise.
Shunsuke Oya, Fumitoshi Imaizumi, and Shoki Takayama
Earth Surf. Dynam., 12, 67–86, https://doi.org/10.5194/esurf-12-67-2024, https://doi.org/10.5194/esurf-12-67-2024, 2024
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The monitoring of pore water pressure in fully and partly saturated debris flows was performed at Ohya landslide scar, central Japan. The pore water pressure in some partly saturated flows greatly exceeded the hydrostatic pressure. The depth gradient of the pore water pressure in the lower part of the flow was generally higher than the upper part of the flow. We conclude that excess pore water pressure is present in many debris flow surges and is an important mechanism in debris flow behavior.
Gabriele Barile, Marco Redolfi, and Marco Tubino
Earth Surf. Dynam., 12, 87–103, https://doi.org/10.5194/esurf-12-87-2024, https://doi.org/10.5194/esurf-12-87-2024, 2024
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River bifurcations often show the closure of one branch (avulsion), whose causes are still poorly understood. Our model shows that when one branch stops transporting sediments, the other considerably erodes and captures much more flow, resulting in a self-sustaining process. This phenomenon intensifies when increasing the length of the branches, eventually leading to branch closure. This work may help to understand when avulsions occur and thus to design sustainable river restoration projects.
Dieter Rickenmann
Earth Surf. Dynam., 12, 11–34, https://doi.org/10.5194/esurf-12-11-2024, https://doi.org/10.5194/esurf-12-11-2024, 2024
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Field measurements of the bedload flux with a high temporal resolution in a steep mountain stream were used to analyse the transport fluctuations as a function of the flow conditions. The disequilibrium ratio, a proxy for the solid particle concentration in the flow, was found to influence the sediment transport behaviour, and above-average disequilibrium conditions – associated with a larger sediment availability on the streambed – substantially affect subsequent transport conditions.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 1–10, https://doi.org/10.5194/esurf-12-1-2024, https://doi.org/10.5194/esurf-12-1-2024, 2024
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Coastal flooding can cause significant damage to coastal ecosystems, infrastructure, and communities and is expected to increase in frequency with the acceleration of sea level rise. In order to respond to it, it is crucial to measure and model their frequency and intensity. Here, we show deep-learning techniques can be successfully used to automatically detect flooding events from complex coastal imagery, opening the way to real-time monitoring and data acquisition for model development.
Nil Carrion-Bertran, Albert Falqués, Francesca Ribas, Daniel Calvete, Rinse de Swart, Ruth Durán, Candela Marco-Peretó, Marta Marcos, Angel Amores, Tim Toomey, Àngels Fernández-Mora, and Jorge Guillén
EGUsphere, https://doi.org/10.5194/egusphere-2023-2721, https://doi.org/10.5194/egusphere-2023-2721, 2023
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The sensitivity to the wave and sea-level forcing sources in predicting a 6-month embayed beach evolution is assessed using two different morphodynamic models. After a successful model calibration using in-situ data, other sources are applied. The wave source choice is critical: hindcast data provide wrong results due to an angle bias whilst the correct dynamics is recovered with the wave conditions from an offshore buoy. The use of different sea-level sources gives no significant differences.
Judith Y. Zomer, Bart Vermeulen, and Antonius J. F. Hoitink
Earth Surf. Dynam., 11, 1283–1298, https://doi.org/10.5194/esurf-11-1283-2023, https://doi.org/10.5194/esurf-11-1283-2023, 2023
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Secondary bedforms that are superimposed on large, primary dunes likely play a large role in fluvial systems. This study demonstrates that they can be omnipresent. Especially during peak flows, they grow large and can have steep slopes, likely affecting flood risk and sediment transport dynamics. Primary dune morphology determines whether they continuously or intermittently migrate. During discharge peaks, the secondary bedforms can become the dominant dune scale.
Matthew C. Morriss, Benjamin Lehmann, Benjamin Campforts, George Brencher, Brianna Rick, Leif S. Anderson, Alexander L. Handwerger, Irina Overeem, and Jeffrey Moore
Earth Surf. Dynam., 11, 1251–1274, https://doi.org/10.5194/esurf-11-1251-2023, https://doi.org/10.5194/esurf-11-1251-2023, 2023
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In this paper, we investigate the 28 June 2022 collapse of the Chaos Canyon landslide in Rocky Mountain National Park, Colorado, USA. We find that the landslide was moving prior to its collapse and took place at peak spring snowmelt; temperature modeling indicates the potential presence of permafrost. We hypothesize that this landslide could be part of the broader landscape evolution changes to alpine terrain caused by a warming climate, leading to thawing alpine permafrost.
Christopher Tomsett and Julian Leyland
Earth Surf. Dynam., 11, 1223–1249, https://doi.org/10.5194/esurf-11-1223-2023, https://doi.org/10.5194/esurf-11-1223-2023, 2023
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Vegetation influences how rivers change through time, yet the way in which we analyse vegetation is limited. Current methods collect detailed data at the individual plant level or determine dominant vegetation types across larger areas. Herein, we use UAVs to collect detailed vegetation datasets for a 1 km length of river and link vegetation properties to channel evolution occurring within the study site, providing a new method for investigating the influence of vegetation on river systems.
Rabab Yassine, Ludovic Cassan, Hélène Roux, Olivier Frysou, and François Pérès
Earth Surf. Dynam., 11, 1199–1221, https://doi.org/10.5194/esurf-11-1199-2023, https://doi.org/10.5194/esurf-11-1199-2023, 2023
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Predicting river morphology evolution is very complicated, especially for mountain rivers with complex morphologies such as the Lac des Gaves reach in France. A 2D hydromorphological model was developed to reproduce the channel's evolution and provide reliable volumetric predictions while revealing the challenge of choosing adapted sediment transport and friction laws. Our model can provide decision-makers with reliable predictions to design suitable restoration measures for this reach.
Daisuke Harada and Shinji Egashira
Earth Surf. Dynam., 11, 1183–1197, https://doi.org/10.5194/esurf-11-1183-2023, https://doi.org/10.5194/esurf-11-1183-2023, 2023
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This paper proposes a method for describing large-wood behavior in terms of the convection equation and the storage equation, which are associated with active sediment erosion and deposition. Compared to the existing Lagrangian method, the proposed method can easily simulate the behavior of large wood in the flow field with active sediment transport. The method is applied to the flood disaster in the Akatani River in 2017, and the 2-D flood flow computations are successfully performed.
Hemanti Sharma and Todd A. Ehlers
Earth Surf. Dynam., 11, 1161–1181, https://doi.org/10.5194/esurf-11-1161-2023, https://doi.org/10.5194/esurf-11-1161-2023, 2023
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Seasonality in precipitation (P) and vegetation (V) influences catchment erosion (E), although which factor plays the dominant role is unclear. In this study, we performed a sensitivity analysis of E to P–V seasonality through numerical modeling. Our results suggest that P variations strongly influence seasonal variations in E, while the effect of seasonal V variations is secondary but significant. This is more pronounced in moderate and least pronounced in extreme environmental settings.
Eduardo Gomez-de la Peña, Giovanni Coco, Colin Whittaker, and Jennifer Montaño
Earth Surf. Dynam., 11, 1145–1160, https://doi.org/10.5194/esurf-11-1145-2023, https://doi.org/10.5194/esurf-11-1145-2023, 2023
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Predicting how shorelines change over time is a major challenge in coastal research. We here have turned to deep learning (DL), a data-driven modelling approach, to predict the movement of shorelines using observations from a camera system in New Zealand. The DL models here implemented succeeded in capturing the variability and distribution of the observed shoreline data. Overall, these findings indicate that DL has the potential to enhance the accuracy of current shoreline change predictions.
Thomas James Barnes, Thomas Vikhamar Schuler, Simon Filhol, and Karianne Staalesen Lilleøren
EGUsphere, https://doi.org/10.5194/egusphere-2023-2430, https://doi.org/10.5194/egusphere-2023-2430, 2023
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In this paper we use machine learning to automatically outline landforms based on their characteristics. We test several methods to identify the most accurate, and then proceed to develop the most accurate to improve its accuracy further. We manage to outline landforms with 65–75 % accuracy, at a resolution of 10 metres, thanks to high-quality/-resolution elevation data. We find that it is possible to run this method at a country-scale to quickly produce landform inventories for future studies.
Christoph Rettinger, Mina Tabesh, Ulrich Rüde, Stefan Vollmer, and Roy M. Frings
Earth Surf. Dynam., 11, 1097–1115, https://doi.org/10.5194/esurf-11-1097-2023, https://doi.org/10.5194/esurf-11-1097-2023, 2023
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Packing models promise efficient and accurate porosity predictions of fluvial sediment deposits. In this study, three packing models were reviewed, calibrated, and validated. Only two of the models were able to handle the continuous and large grain size distributions typically encountered in rivers. We showed that an extension by a cohesion model is necessary and developed guidelines for successful predictions in different rivers.
Alexander A. Ermilov, Gergely Benkő, and Sándor Baranya
Earth Surf. Dynam., 11, 1061–1095, https://doi.org/10.5194/esurf-11-1061-2023, https://doi.org/10.5194/esurf-11-1061-2023, 2023
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A novel, artificial-intelligence-based riverbed sediment analysis methodology is introduced that uses underwater images to identify the characteristic sediment classes. The main novelties of the procedure are as follows: underwater images are used, the method enables continuous mapping of the riverbed along the measurement vessel’s route contrary to conventional techniques, the method is cost-efficient, and the method works without scaling.
Kelly M. Sanks, John B. Shaw, Samuel M. Zapp, José Silvestre, Ripul Dutt, and Kyle M. Straub
Earth Surf. Dynam., 11, 1035–1060, https://doi.org/10.5194/esurf-11-1035-2023, https://doi.org/10.5194/esurf-11-1035-2023, 2023
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River deltas encompass many depositional environments (like channels and wetlands) that interact to produce coastal environments that change through time. The processes leading to sedimentation in wetlands are often neglected from physical delta models. We show that wetland sedimentation constrains flow to the channels, changes sedimentation rates, and produces channels more akin to field-scale deltas. These results have implications for the management of these vulnerable coastal landscapes.
Katharina Wetterauer and Dirk Scherler
Earth Surf. Dynam., 11, 1013–1033, https://doi.org/10.5194/esurf-11-1013-2023, https://doi.org/10.5194/esurf-11-1013-2023, 2023
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In glacial landscapes, debris supply rates vary spatially and temporally. Rockwall erosion rates derived from cosmogenic 10Be concentrations in medial moraine debris at five Swiss glaciers around Pigne d'Arolla indicate an increase in erosion from the end of the Little Ice Age towards deglaciation but temporally more stable rates over the last ∼100 years. Rockwall erosion rates are higher where rockwalls are steep and north-facing, suggesting a potential slope and temperature control.
Sam Anderson, Nicole Gasparini, and Joel Johnson
Earth Surf. Dynam., 11, 995–1011, https://doi.org/10.5194/esurf-11-995-2023, https://doi.org/10.5194/esurf-11-995-2023, 2023
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We measured rock strength and amount of fracturing in the two different rock types, sandstones and carbonates, in Last Chance Canyon, New Mexico, USA. Where there is more carbonate bedrock, hills and channels steepen in Last Chance Canyon. This is because the carbonate-type bedrock tends to be more thickly bedded, is less fractured, and is stronger. The carbonate bedrock produces larger boulders than the sandstone bedrock, which can protect the more fractured sandstone bedrock from erosion.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
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Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Koji Ohata, Hajime Naruse, and Norihiro Izumi
Earth Surf. Dynam., 11, 961–977, https://doi.org/10.5194/esurf-11-961-2023, https://doi.org/10.5194/esurf-11-961-2023, 2023
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We investigated the influence of sediment transport modes on the formation of bedforms using theoretical analysis. The results of the theoretical analysis were verified with published data of plane beds obtained by fieldwork and laboratory experiments. We found that suspended sand particles can promote the formation of plane beds on a fine-grained bed, which suggests that the presence of suspended particles suppresses the development of dunes under submarine sediment-laden gravity currents.
Eric Petersen, Regine Hock, and Michael G. Loso
EGUsphere, https://doi.org/10.5194/egusphere-2023-1913, https://doi.org/10.5194/egusphere-2023-1913, 2023
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Ice cliffs are melt hot spots that increase melt rates on debris-covered glaciers which otherwise see a reduction in melt rates. In this study, we show how surface runoff streams contribute to the generation, evolution, and survival of ice cliffs by carving into the glacier and transporting rocky debris. On Kennicott Glacier, Alaska, 31.4 % of streams are actively influenced by streams, while nearly half are within 10 m of streams.
Matan Ben-Asher, Florence Magnin, Sebastian Westermann, Josué Bock, Emmanuel Malet, Johan Berthet, Ludovic Ravanel, and Philip Deline
Earth Surf. Dynam., 11, 899–915, https://doi.org/10.5194/esurf-11-899-2023, https://doi.org/10.5194/esurf-11-899-2023, 2023
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Quantitative knowledge of water availability on high mountain rock slopes is very limited. We use a numerical model and field measurements to estimate the water balance at a steep rock wall site. We show that snowmelt is the main source of water at elevations >3600 m and that snowpack hydrology and sublimation are key factors. The new information presented here can be used to improve the understanding of thermal, hydrogeological, and mechanical processes on steep mountain rock slopes.
Jessica Droujko, Srividya Hariharan Sudha, Gabriel Singer, and Peter Molnar
Earth Surf. Dynam., 11, 881–897, https://doi.org/10.5194/esurf-11-881-2023, https://doi.org/10.5194/esurf-11-881-2023, 2023
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We combined data from satellite images with data measured from a kayak in order to understand the propagation of fine sediment in the Vjosa River. We were able to find some storm-activated and some permanent sources of sediment. We also estimated how much fine sediment is carried into the Adriatic Sea by the Vjosa River: approximately 2.5 Mt per year, which matches previous findings. With our work, we hope to show the potential of open-access satellite images.
Kate C. P. Leary, Leah Tevis, and Mark Schmeeckle
Earth Surf. Dynam., 11, 835–847, https://doi.org/10.5194/esurf-11-835-2023, https://doi.org/10.5194/esurf-11-835-2023, 2023
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Despite the importance of bedforms (e.g., ripples, dunes) to sediment transport, the details of sediment transport on a sub-bedform scale are poorly understood. This paper investigates sediment transport in the downstream and cross-stream directions over bedforms with straight crests. We find that the patterns of bedload transport are highly variable on the sub-bedform scale, which is important for our understanding of the evolution of bedforms with complex crest geometries.
Paul A. Carling, John D. Jansen, Teng Su, Jane Lund Andersen, and Mads Faurschou Knudsen
Earth Surf. Dynam., 11, 817–833, https://doi.org/10.5194/esurf-11-817-2023, https://doi.org/10.5194/esurf-11-817-2023, 2023
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Many steep glaciated rock walls collapsed when the Ice Age ended. How ice supports a steep rock wall until the ice decays is poorly understood. A collapsed rock wall was surveyed in the field and numerically modelled. Cosmogenic exposure dates show it collapsed and became ice-free ca. 18 ka ago. The model showed that the rock wall failed very slowly because ice was buttressing the slope. Dating other collapsed rock walls can improve understanding of how and when the last Ice Age ended.
Paul A. Jarvis, Clement Narteau, Olivier Rozier, and Nathalie M. Vriend
Earth Surf. Dynam., 11, 803–815, https://doi.org/10.5194/esurf-11-803-2023, https://doi.org/10.5194/esurf-11-803-2023, 2023
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Sand dune migration velocity is inversely proportional to dune size. Consequently, smaller, faster dunes can collide with larger, slower downstream dunes. Such collisions can result in either coalescence or ejection, whereby the dunes exchange mass but remain separate. Our numerical simulations show that the outcome depends probabilistically on the dune size ratio, which we describe through an empirical function. Our numerical predictions compare favourably against experimental observations.
Adrian Ringenbach, Peter Bebi, Perry Bartelt, Andreas Rigling, Marc Christen, Yves Bühler, Andreas Stoffel, and Andrin Caviezel
Earth Surf. Dynam., 11, 779–801, https://doi.org/10.5194/esurf-11-779-2023, https://doi.org/10.5194/esurf-11-779-2023, 2023
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Swiss researchers carried out repeated rockfall experiments with rocks up to human sizes in a steep mountain forest. This study focuses mainly on the effects of the rock shape and lying deadwood. In forested areas, cubic-shaped rocks showed a longer mean runout distance than platy-shaped rocks. Deadwood especially reduced the runouts of these cubic rocks. The findings enrich standard practices in modern rockfall hazard zoning assessments and strongly urge the incorporation of rock shape effects.
Colin K. Bloom, Corinne Singeisen, Timothy Stahl, Andrew Howell, and Chris Massey
Earth Surf. Dynam., 11, 757–778, https://doi.org/10.5194/esurf-11-757-2023, https://doi.org/10.5194/esurf-11-757-2023, 2023
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Earthquakes can cause damaging coastal cliff retreat, but we have a limited understanding of how these infrequent events influence multidecadal retreat. This makes hazard planning a challenge. In this study, we use historic aerial images to measure coastal cliff-top retreat at a site in New Zealand. We find that earthquakes account for close to half of multidecadal retreat at this site, and our results have helped us to develop tools for estimating the influence of earthquakes at other sites.
Rishitosh K. Sinha, Dwijesh Ray, Tjalling De Haas, Susan J. Conway, and Axel Noblet
Earth Surf. Dynam., 11, 713–730, https://doi.org/10.5194/esurf-11-713-2023, https://doi.org/10.5194/esurf-11-713-2023, 2023
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Our detailed investigation of Martian gullies formed in different substrates in 29 craters distributed between 30°–75° S latitude suggests that they can be differentiated from one another in terms of (1) morphology and length of alcoves and (2) mean gradient of the gully fans. The comparison between the Melton ratio, alcove length, and fan gradient of Martian and terrestrial gullies suggests that Martian gullies were likely formed by terrestrial debris-flow-like processes in the past.
Christopher J. Skinner and Thomas J. Coulthard
Earth Surf. Dynam., 11, 695–711, https://doi.org/10.5194/esurf-11-695-2023, https://doi.org/10.5194/esurf-11-695-2023, 2023
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Landscape evolution models allow us to simulate the way the Earth's surface is shaped and help us to understand relevant processes, in turn helping us to manage landscapes better. The models typically represent the land surface using a grid of square cells of equal size, averaging heights in those squares. This study shows that the size chosen by the modeller for these grid cells is important, with larger sizes making sediment output events larger but less frequent.
Hossein Hosseiny, Claire C. Masteller, Jedidiah E. Dale, and Colin B. Phillips
Earth Surf. Dynam., 11, 681–693, https://doi.org/10.5194/esurf-11-681-2023, https://doi.org/10.5194/esurf-11-681-2023, 2023
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It is of great importance to engineers and geomorphologists to predict the rate of bed load in rivers. In this contribution, we used a large dataset of measured data and developed an artificial neural network (ANN), a machine learning algorithm, for bed load prediction. The ANN model predicted the bed load flux close to measured values and better than the ones obtained from four standard bed load models with varying degrees of complexity.
Ian Delaney, Leif Anderson, and Frédéric Herman
Earth Surf. Dynam., 11, 663–680, https://doi.org/10.5194/esurf-11-663-2023, https://doi.org/10.5194/esurf-11-663-2023, 2023
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This paper presents a two-dimensional subglacial sediment transport model that evolves a sediment layer in response to subglacial sediment transport conditions. The model captures sediment transport in supply- and transport-limited regimes across a glacier's bed and considers both the creation and transport of sediment. Model outputs show how the spatial distribution of sediment and water below a glacier can impact the glacier's discharge of sediment and erosion of bedrock.
Cited articles
An, C., Parker, G., Fu, X., Lamb, M. P., and Venditti, J. G.: Morphodynamics of downstream fining in rivers with unimodal sand-gravel feed, in: Proceedings International Conference on Fluvial Hydraulics (River Flow 2020), Delft, Netherlands, 7–10 July 2020, p. 2646, CRC Press, ISBN 9781003110958, 2020.
Ashida, K. and Michiue, M.: Study on hydraulic resistance and bedload transport rate in alluvial streams, Transactions, Japan Soc. Civil Eng., 206, 59–69, 1972 (in Japanese).
Birch, S. P. D., Parker, G., Corlies, P., Soderblom, J., Miller, J. W., Palermo, R., Lora, J. M., Ashton, A. D., Hayes, A. G., and Perron, J. T.: Reconstructing river flows remotely on Earth, Titan, and Mars, P. Natl. Acad. Sci. USA, 120, e2206837120, https://doi.org/10.1073/pnas.2206837120, 2023.
Brownlie, W. R.: Prediction of flow depth and sediment discharge in open channels, Report No. KH-R-43A, W. M. Keck Laboratory of Hydraulics and Water Resources, California Institute of Technology, Pasadena, California, USA, 1982.
Butler, J.: Further reflections on conversations of our time, Diacritics, 27, 13–15, 1997.
Carling, P. A.: Freshwater megaflood sedimentation: What can we learn about generic processes?, Earth-Sci. Rev., 125, 87–113, 2013.
Chen, H. Y., and Nordin Jr., C. F.: Missouri river temperature effects in the transition from dunes to plane bed, U. S. Army Engineer District, Omaha, M.R.D. Sediment Series No. 14, 41 pp., https://apps.dtic.mil/sti/tr/pdf/ADA034935.pdf (last access: 28 January 2024), 1976.
Church, M. and Hassan, M. A.: The fluvial grain size gap: experimental confirmation of hydraulic origin. Earth. Surf. Proc. Land., 48, 1502–1511, https://doi.org/10.1002/esp.5562, 2023.
Cui, Y., Parker, G., Lisle, T., Gott, J., Hansler, M., Pizzuto, J. E., Allmendinger, N. E., and Reed, J. M.: Sediment pulses in mountain rivers. Part 1. Experiments, Water Resour. Res., 39, 1239, https://doi.org/10.1029/2002WR001803, 2003a.
Cui, Y., Parker, G., Pizzuto, J. E., and Lisle, T. E.: Sediment pulses in mountain rivers. Part 2. Comparison between experiments and numerical predictions, Water Resour. Res., 39, 1240, https://doi.org/10.1029/2002WR001805, 2003b.
de Leeuw, J., Lamb, M. P., Parker, G., Moodie, A. J., Haught, D., Venditti, J. G., and Nittrouer, J. A.: Entrainment and suspension of sand and gravel, Earth Surf. Dynam., 8, 485–504, https://doi.org/10.5194/esurf-8-485-2020, 2020.
Dietrich, W. E.: Settling velocity of natural particles, Water Resour. Res., 18, 1615–1626, https://doi.org/10.1029/WR018i006p01615, 1982.
Dingle, E. H and Venditti, J. G.: Experiments on gravel-sand transitions: behavior of the grain size gap material, J. Geophys. Res.-Earth, 128, e2023JF007117, https://doi.org/10.1029/2023JF007117, 2023.
Dingle, E. H., Kusack, K. M, and Venditti, J. G.: The gravel-sand transition and grain size gap in river bed sediments, Earth-Sci. Rev., 222, 103838, https://doi.org/10.1016/j.earscirev.2021.103838, 2021.
Dong, T., Nittrouer, J. A., Il'echiva, E., Pavlov, McElroy, B. M., Czapiga, M., Ma, H. B., and Parker, G.: Controls on gravel termination in seven distributary channels of the Selenga River delta, Baikal Rift basin, Russia, Geol. Soc. Am. Bull., 128, 1297–1312, 2016.
Egiazaroff, I. V.: Calculation of nonuniform sediment concentrations, J. Hydr. Eng. Div.-ASCE, 91, 225–247, https://doi.org/10.1061/JYCEAJ.0001277, 1965.
Engelund, F. and Hansen, E.: A Monograph on Sediment Transport in Alluvial Streams, Technisk Vorlag, Copenhagen, Denmark, https://repository.tudelft.nl/islandora/object/uuid%3A81101b08-04b5-4082-9121-861949c336c9 (last access: 28 January 2024), 1967.
Ferguson, R., Hoey, T., Wathen, S., and Werritty, A.: Field evidence for rapid downstream fining of river gravels through selective transport, Geology, 24, 179–182, 1996.
Frings, R. M.: Sedimentary characteristics of the ravel-sand transition in the River Rhine, J. Sediment. Res., 81, 52–63, https://doi.org/10.2110/jsr.2011.2, 2011.
Fujita, K., Yamamoto, K., and Akahori, Y,: Evolution mechanisms of the longitudinal bed profiles of major alluvial rivers in Japan and their implications for profile change prediction, Proc. Japan Soc. Civil Eng. 600, 37–50, 1998 (in Japanese).
Garcia, M. H.: ASCE Manual of Practice 110 – Sedimentation Engineering, American Society of Civil Engineering, https://doi.org/10.1061/40856(200)94, 2006.
Garcia, M. H. and Parker, G.: Entrainment of bed sediment into suspension, J. Hydraul. Eng.-ASCE, 117, 414–435, 1991.
Goldstein, S.: The steady flow of a viscous fluid past a fixed spherical obstacle at small Reynolds numbers, P. R. Soc. Lond. A-Conta., 123, 225–235, 1929.
Guy, H. P., Simons, D. B., and Richardson, E. V.: Summary of alluvial channel data from flume experiments, 1956-61, U.S. Geol. Survey Prof. Paper 462-I, https://pubs.usgs.gov/pp/0462i/report.pdf (last access: 28 January 2024), 1966.
Haljasmaa, I. V.: On the drag of fluid and solid particles freely moving in a continuous medium, Doctoral dissertation, University of Pittsburgh, http://d-scholarship.pitt.edu/id/eprint/8557 (last access: 28 January 2024), 2006.
Hey, R. D., Bathurst, J. C., and Thorne, C. R.: Gravel-bed Rivers. Fluvial Processes and Management, John Wiley & Sons Ltd, ISBN 0 471 10139 7, 1982.
Hernandez-Moreira, R., Jafarinek, S., Sanders, S., Kendall, C. G. St., Parker, G., and Viparelli, E.: Emplacement of massive deposits by sheet flow, Sedimentology, 67, 1951–1972, https://doi.org/10.1111/sed.12689, 2019.
Hill, K. M., Gaffney, J., Baumgardner, S., Wilcock, P., and Paola, C.: Experimental study of the effect of grain sizes in a bimodal mixture on bed slope, bed texture, and the transition to washload, Water. Resour. Res., 53, 923–941, 2016.
Ikeda, S.: Lateral bed load transport on side slopes, J. Hydraul. Eng.-ASCE, 128, 1369–1373, 1982.
Julien, P. Y. and Bounvilay, B.: Velocity of rolling bed load particles, J. Hydraul. Eng.-ASCE, 139, 177–186, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000657, 2013.
Jutzeler, M., McPhie, J., Allen, J. R., and Proussevitch, A. A.: Grain size distribution of volcaniclastic rocks 2: Characterizing grain size and hydraulic sorting, J. Volcanol. Geoth. Res., 301, 191–203, 2015.
Khosravi, K., Khozani, Z. S., and Cooper, J. R.: Predicting stable gravel-bed river hydraulic geometry: A test of novel, advanced, hybrid data mining algorithms, Environ. Model. Softw., 144, 105165, https://doi.org/10.1016/j.envsoft.2021.105165, 2021.
Kodama, Y.: Downstream changes in the lithology and grain size of fluvial gravels, the Watarase River, Japan; evidence of the role of abrasion in downstream fining, J. Sediment. Res., 64, 68–75, 1994.
Lamb, M. P. and Venditti, J. G.: The grain size gap and abrupt gravel-sand transitions in rivers due to suspension fallout, Geophys. Res. Lett., 43, 3777–3785, 2016.
Lamb, M. P, Dietrich, W. E., and Venditti, J. G.: Is the critical Shields stress for incipient sediment motion dependent on channel-bed slope?, J. Geophys. Res.-Earth, 113, F02008, https://doi.org/10.1029/2007JF000831, 2008.
Lapôtre, M. G. A., Lamb, M. P., and McElroy, B. J.: What sets the size of current ripples?, Geology, 45, 243–246, https://doi.org/10.1130/G38598, 2017.
Laronne, J. B. and Tsutsumi, D.: Special Issue: Gravel Bed Rivers 8, Earth Surf. Proc. Land., 43, 2669–2672, https://doi.org/10.1002/esp.4392, 2018.
Larsen, I. J. and Lamb, M. P.: Progressive incision of the Channeled Scablands by outburst floods, Nature, 538, 229–232, https://doi.org/10.1038/nature19817, 2016.
Li, C., Czapiga, M. J., Eke, E. C., Viparelli, E., and Parker, G.: Variable Shields number model for river bankfull geometry: bankfull shear velocity is viscosity-dependent but grain size-independent, J. Hydraul. Res., 53, 36–48, https://doi.org/10.1080/00221686.2014.939113, 2015.
Li, S.-L., Li, S.-L., Shan, X., Gong, C.-L., and Yu, X.-H.: Classification, formation, and transport mechanisms of mud clasts, Int. Geol. Rev., 59, 1609–1620, 2017.
Lin, Y.-P., An, C.-G., Parker, G., Liu, W.-M., and Fu, X.-D.: Morphodynamics of bedrock-alluvial rivers subject to landslide dam outburst floods, J. Geophys. Res.-Earth, 127, e2022JF006605, https://doi.org/10.1029/2022JF006605, 2022.
Lin, Y.-P., An, C.-G., Zheng, S., Nie, R.-H., Parker, G., Hassan, M. A., Czapiga, M. J., and Fu, X.-D.: Degradation of a foreland river after the Wenchuan Earthquake, China: a combined effect of weirs, sediment supply and sediment mining, Water Resour. Res., 59, e2023WR035345, https://doi.org/10.1029/2023WR035345, 2023.
Liu, H. D.: Mechanics of Sediment Ripple Formation, J. Hydr. Eng. Div.-ASCE, 83, 1197-1–1197-23, 1957.
Meyer-Peter, E. and Müller, R.: Formulas for Bed-Load Transport, in: Proceedings, 2nd Congress, Stockholm, 6–9 June 1948, International Association of Hyrdraulic Research, 39–64, 1948.
Nino, Y., Lopez, F., and Garcia, M. H.: Threshold for particle entrainment into suspension, Sedimentology, 50, 247–263, 2003.
Novak, P. and Nalluri, C.: Sediment transport in smooth fixed bed channels, J. Hydr. Eng Div.-ASCE, 101, 1139–1154, 1975.
Paola, C. and Seal, R.: Grain size patchiness as a cause of selective deposition and downstream fining, Water Resour. Res., 31, 1395–1407, https://doi.org/10.1029/94WR02975, 1995.
Parker, G.: Surface based bedload transport relation for gravel rivers, J. Hydraul. Res., 28, 417–436, https://doi.org/10.1080/00221689009499058, 1990.
Parker, G.: Teasing out simplicity from complexity: the law of constant bankfull velocity in alluvial rivers, AGU Fall Meeting, San Francisco, CA, 11–15 December 2023, id. EP41D-06, 2014.
Parker, G. and Klingeman, P.: On why gravel bed streams are paved, Water Resour. Res., 18, 1409–1423, https://doi.org/10.1029/WR018i005p01409, 1982.
Parker, G. and Toro-Escobar, C. M.: Equal mobility of gravel in streams: the remains of the day, Water Resour. Res., 38, 1264, https://doi.org/10.1029/2001WR000669, 2002.
Parker, G., Wilcock, P., Paola, C., Dietrich, W. E., and Pitlick, J.: Physical basis for quasi-universal relations describing bankfull hydraulic geometry of single-thread gravel bed rivers, J. Geophys. Res.-Earth, 112, F04005, https://doi.org/10.1029/2006JF000549, 2007.
Peng, H., Huang, H.-Q., Yu, G.-A., and Zhong, H. W.: Applicability of flow resistance formulae for sand-bed channels: an assessment using a very large data set, Front. Environ. Sci., 10, 840653, https://doi.org/10.3389/fenvs.2022.840653, 2022.
Rouse, H.: Modern conceptions of the mechanics of turbulence, Paper No. 1965, T. Am. Soc. Civ. Eng., 102, 463–543, 1937.
Sambrook Smith, G. H. and Ferguson, R. I.: The gravel-sand transition along river channels, J. Sediment Res., 65, 423–430, https://doi.org/10.1306/D42680E0-2B26-11D7-8648000102C1865D, 1995.
Schlichting, H.: Boundary Layer Theory, 7th edn., McGraw-Hill, New York, ISBN-13 978-9332902824, 1979.
Schneider, J. M., Rickenmann, D., Turowski, J. M, Bunte, K., and Kirchner, J. W.: Applicability of bed load transport models for mixed size sediments in steep streams considering macro-roughness, Water Resour. Res., 51, 5260–5283, https://doi.org/10.1002/2014WR016417, 2015.
Shaw, J. and Kellerhals, R.: The Composition of Recent Alluvial Gravels in Alberta River Beds, Bulletin 41, Alberta Research Council, Edmonton, Alberta, Canada, https://static.ags.aer.ca/files/document/BUL/BUL_041.pdf (last access: 28 January 2024), 1982.
Simons, D. B. and Richardson, E. V.: Forms of bed roughness in alluvial channels, J. Hydr. Eng. Div.-ASCE, 87, 87–105, 1961.
Song, Y., Fu, X., Lin, Y., An, C., and Ma, H.: What controls the magnitude and the shape of landslide dam-breaching flood hydrograph? Case studies of emergent forecasts for outburst floods of Jiala and Baige Barrier Lakes, Frontiers in Water, 4, 834132, https://doi.org/10.3389/frwa.2022.834132, 2022.
Southard, J. B. and Boguchwal, L. A.: Bed configurations in steady unidirectional water flows; Part 3, Effects of temperature and gravity, J. Sediment Res., 60, 680–686, https://doi.org/10.2110/jsr.60.680, 1990.
Streeter, V. L.: Fluid Mechanics, McGraw-Hill, 741 pp., ISBN 0-07-062232-9, 1971.
Tucker, M. E.: Sedimentary Rocks in the Field, J. Wiley, 3rd edn., 232 pp., ISBN 0-470-85123-6, 2003.
van Rijn, L. C. Sediment transport, part I:bed load transport, J. Hydraul. Eng.-ASCE, 110, 1431–1456, 1984.
Venditti, J. G. and Bradley, R.: Bedforms in sand bed rivers, in: Treatise on Geomorphology, Academic Press, https://doi.org/10.1016/B978-0-12-374739-6.00235-9, 2022.
Venditti, J. G. and Church, M.: Morphology and controls on the position of a gravel-sand transition: Fraser River, British Columbia, J. Geophys. Res.-Earth, 119, 1959–1976, https://doi.org/10.1002/2014JF003147, 2014.
Venditti, J. G., Dietrich, W. E., Nelson, P. A., Wydzga, M. A., Fadde, J., and Sklar, L.: Mobilization of coarse surface layers in gravel-bedded rivers by finer gravel bed load, Water Resour. Res., 46, W07506, https://doi.org/10.1029/2009WR008329, 2010a.
Venditti, J. G., Dietrich, W. E., Nelson, P. A., Wydzga, M. A., Fadde, J., and Sklar, L.: Mobilization of coarse surface layers in gravel-bedded rivers by finer gravel bed load, Water Resour. Res., 46, W07506, https://doi.org/10.1029/2009WR008329, 2010b.
Venditti, J. G., Domarad, N., Church, M., and Rennie, C. D.: The gravel-sand transition: Sediment dynamics in a diffuse extension, J. Geophys. Res.-Earth, 120, 943–963, https://doi.org/10.1002/2014JF003328, 2015.
Viparelli, E., Solari, L., and Hill, K. M.: Downstream lightening and upward heavying: Experiments with sediments differing in density, Sedimentology, 62, 1384–1407, https://doi.org/10.1111/sed.12187, 2015.
Wilcock, P. R. and Crowe, J. C.: Surface-based transport model for mixed-size sediment, J. Hydraul. Eng.-ASCE, 129, 120–128, https://doi.org/10.1061/(ASCE)0733-9429(2003)129, 2003.
Wilkerson, G. V. and Parker, G.: Physical basis for quasi-universal relations describing bankfull hydraulic geometry of sand-bed Rivers, J. Hydraul. Eng.-ASCE, 137, 739–753, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000352, 2011.
Wright, S. and Parker, G.: Flow resistance and suspended load in sand-bed rivers: simplified stratification model, J. Hydraul. Eng.-ASCE, 130, 796–805, 2004.
Xu, J.-X.: Comparison of hydraulic geometry between sand- and gravel-bed rivers in relation to channel pattern discrimination, Earth Surf. Proc. Land., 29, 645–657, https://doi.org/10.1002/esp.1059, 2004.
Yang, H.-L., Fan, M.-Q., Liu, A.-R., and Dong, L.-P.: General formulas for drag coefficient and settling velocity of sphere based on theoretical law, International Journal of Mining Science and Technology, 25, 219–223, 2015.
Yatsu, E.: On the longitudinal profile of the graded river, Eos T. Am. Geophys. Un., 36, 655–663, https://doi.org/10.1029/TR036i004p00655, 1955.
Short summary
River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments to show that particles in the 1–5 mm range (i) are the finest range not easily suspended by alluvial flood flows, (ii) are transported preferentially over coarser gravel, and (iii), within limits, are also transported preferentially over sand. We show how fluid viscosity mediates the special status of sediment in this range.
River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments...
