Articles | Volume 6, issue 4
https://doi.org/10.5194/esurf-6-1041-2018
© Author(s) 2018. 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-6-1041-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Nov 2018
Research article |
| 14 Nov 2018
| 14 Nov 2018
Fluvial response to changes in the magnitude and frequency of sediment supply in a 1-D model
Department of Geography, the University of British Columbia,
Vancouver, BC, Canada
Marwan A. Hassan
Department of Geography, the University of British Columbia,
Vancouver, BC, Canada
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Shawn M. Chartrand, A. Mark Jellinek, Marwan A. Hassan, and Carles Ferrer-Boix
Earth Surf. Dynam., 11, 1–20, https://doi.org/10.5194/esurf-11-1-2023, https://doi.org/10.5194/esurf-11-1-2023, 2023
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Rivers with alternating patterns of shallow and deep flows are commonly observed where a river widens and then narrows, respectively. But what if width changes over time? We use a lab experiment to address this question and find it is possible to decrease and then increase river width at a specific location and observe that flows deepen and then shallow consistent with expectations. Our observations can inform river restoration and climate adaptation programs that emphasize river corridors.
Chendi Zhang, Yuncheng Xu, Marwan A. Hassan, Mengzhen Xu, and Pukang He
Earth Surf. Dynam., 10, 1253–1272, https://doi.org/10.5194/esurf-10-1253-2022, https://doi.org/10.5194/esurf-10-1253-2022, 2022
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Step-pool morphology is common in mountain streams. The geomorphic processes of step-pool features closely interact with hydraulic properties, which have limited access due to measurement difficulties. We established a combined approach using both physical experiments and numerical simulations to acquire detailed three-dimensional hydraulics for step-pool morphology, which improves the understanding of the links between hydraulics and morphology for a step-pool feature.
J. Kevin Pierce, Marwan A. Hassan, and Rui M. L. Ferreira
Earth Surf. Dynam., 10, 817–832, https://doi.org/10.5194/esurf-10-817-2022, https://doi.org/10.5194/esurf-10-817-2022, 2022
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We describe the flow of sediment in river channels by replacing the complicated details of the turbulent water with probability arguments. Our major conclusions are that (1) sediment transport can be phrased in terms of the movements of individual sediment grains, (2) transport rates in river channels are inherently uncertain, and (3) sediment transport in rivers is directly analogous to a number of phenomena which we understand relatively well, such as molecules moving in air.
Xingyu Chen, Marwan A. Hassan, and Xudong Fu
Earth Surf. Dynam., 10, 349–366, https://doi.org/10.5194/esurf-10-349-2022, https://doi.org/10.5194/esurf-10-349-2022, 2022
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We compiled a large image dataset containing more than 125 000 sediments and developed a model (GrainID) based on convolutional neural networks to measure individual grain size from images. The model was calibrated on flume and natural stream images covering a wide range of fluvial environments. The model showed high performance compared with other methods. Our model showed great potential for grain size measurements from a small patch of sediment in a flume to a watershed-scale drone survey.
Chenge An, Marwan A. Hassan, Carles Ferrer-Boix, and Xudong Fu
Earth Surf. Dynam., 9, 333–350, https://doi.org/10.5194/esurf-9-333-2021, https://doi.org/10.5194/esurf-9-333-2021, 2021
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Mountain rivers are characterized by fluctuations of water flow, including both flood and inter-flood low flow. Recently, increasing attention has been paid to how inter-flood low flow affects the sediment transport in subsequent floods. Here we present a series of flume experiments. Results show that the existence of inter-flood low flow can reduce the sediment transport at the beginning of the subsequent flood. However, such an effect is gradually erased with the increase of flow intensity.
Carina Helm, Marwan A. Hassan, and David Reid
Earth Surf. Dynam., 8, 913–929, https://doi.org/10.5194/esurf-8-913-2020, https://doi.org/10.5194/esurf-8-913-2020, 2020
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Forested, gravel-bed streams possess complex channel morphologies which are difficult to objectively characterize. This paper describes a novel technique using a remotely piloted aircraft (RPA) to characterize these systems below the forest canopy. The results demonstrate the accuracy and coverage of RPAs for objectively characterizing and classifying these systems relative to more traditional, time-consuming techniques that are generally used in these environments.
Matteo Saletti and Marwan A. Hassan
Earth Surf. Dynam., 8, 855–868, https://doi.org/10.5194/esurf-8-855-2020, https://doi.org/10.5194/esurf-8-855-2020, 2020
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Mountain streams often display a stepped morphology but the conditions under which these steps form, remain stable, and eventually collapse are still not entirely clear. We run flume experiments to study how (a) the amount of sediment input and (b) channel width variations affect step dynamics in steep channels. Steps form preferentially in areas of flow convergence (channel narrowing) and their frequency is higher when sediment supply is larger than zero but smaller than the transport capacity.
Matteo Saletti, Peter Molnar, Marwan A. Hassan, and Paolo Burlando
Earth Surf. Dynam., 4, 549–566, https://doi.org/10.5194/esurf-4-549-2016, https://doi.org/10.5194/esurf-4-549-2016, 2016
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This study presents a new reduced-complexity model with few parameters linked to basic physical processes, which aims to reproduce the transport of sediment as bed load and the formation and stability of channel morphology in steep mountain streams. The model is able to simulate the formation and stability of steps, bed structures commonly encountered in steep channels, by assuming that their formation is due to intense sediment transport during high flows causing jamming of particles.
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Daniel J. Ciarletta, Jennifer L. Miselis, Julie C. Bernier, and Arnell S. Forde
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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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Cho-Hee Lee, Yeong Bae Seong, John Weber, Sangmin Ha, Dong-Eun Kim, and Byung Yong Yu
EGUsphere, https://doi.org/10.5194/egusphere-2024-198, https://doi.org/10.5194/egusphere-2024-198, 2024
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Geomorphic indices were used to understand topographic changes in response to tectonic activity. We applied indices to evaluate the relative tectonic intensity of Ulsan Fault Zone, one of the most active fault zones in Korea. We divided the UFZ into five segments based on spatial variation in intensity. We modelled the landscape evolution of study area and interpreted tectono-geomorphic history that the northern part of the UFZ experienced asymmetric uplift, while the southern part did not.
Johannes Leinauer, Michael Dietze, Sibylle Knapp, Riccardo Scandroglio, Maximilian Jokel, and Michael Krautblatter
EGUsphere, https://doi.org/10.5194/egusphere-2024-231, https://doi.org/10.5194/egusphere-2024-231, 2024
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Massive rock slope failures are a significant alpine hazard and change the earth´s surface. Therefore, we must understand what controls the preparation of such events. By correlating four years of slope displacements with meteorological and seismic data, we found that water from rain and snowmelt is the most important driver. Our approach is applicable to similar sites and indicates, where future climatic changes, e.g. in rain intensity and frequency, may alter the preparation of slope failure.
Gary Parker, Chenge An, Michael P. Lamb, Marcelo H. Garcia, Elizabeth H. Dingle, and Jeremy G. Venditti
Earth Surf. Dynam., 12, 367–380, https://doi.org/10.5194/esurf-12-367-2024, https://doi.org/10.5194/esurf-12-367-2024, 2024
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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.
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.
Aaron T. Steelquist, Gustav B. Seixas, Mary L. Gillam, Sourav Saha, Seulgi Moon, and George E. Hilley
EGUsphere, https://doi.org/10.5194/egusphere-2024-71, https://doi.org/10.5194/egusphere-2024-71, 2024
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The rates at which rivers erode their bed can be used to interpret the geologic history of a region. However, these rates depend significantly on the time window over which you measure. We use multiple dating methods to determine an incision rate on the San Juan River and compare it to regional rates with longer timescales. We demonstrate how specific geologic events, such as cutoffs of bedrock meander bends, are likely to preserve material we can date but also bias the rates we measure.
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.
Jessica Laible, Guillaume Dramais, Jérôme Le Coz, Blaise Calmel, Benoît Camenen, David J. Topping, William Santini, Gilles Pierrefeu, and François Lauters
EGUsphere, https://doi.org/10.5194/egusphere-2023-2348, https://doi.org/10.5194/egusphere-2023-2348, 2024
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Suspended-sand fluxes in rivers vary with time and space, complicating their measurement. The proposed method captures the vertical and lateral variations of suspended-sand concentration throughout a river cross section. It merges water samples taken at various positions throughout the cross section with high-resolution acoustic velocity and discharge measurements. The method also determines the sand flux uncertainty and can be easily applied to other sites using the available open-source code.
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.
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.
Dominic T. Robson and Andreas C. W. Baas
EGUsphere, https://doi.org/10.5194/egusphere-2023-2900, https://doi.org/10.5194/egusphere-2023-2900, 2023
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We present simulations of large populations (swarms) of a type of sand dune known as barchans. Our findings reveal that the rate at which sand moves inside an asymmetric barchan is vital to the behaviour of swarms and that many observed properties of the dunes can be explained by similar rates. We also show that different directions of the wind and the density of dunes added to swarms play important roles in shaping their evolution.
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.
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.
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.
Cited articles
Ahnert, F.: Equilibrium, scale and inheritance in geomorphology,
Geomorphology,
11, 125–140, https://doi.org/10.1016/0169-555x(94)90077-9, 1994. a
An, C., Cui, Y., Fu, X., and Parker, G.: Gravel-bed river evolution in
earthquake-prone regions subject to cycled hydrographs and repeated sediment
pulses, Earth Surf. Proc. Land., 42, 2426–2438,
https://doi.org/10.1002/esp.4195, 2017a. a, b, c
An, C., Fu, X., Wang, G., and Parker, G.: Effect of grain sorting on gravel
bed
river evolution subject to cycled hydrographs: Bed load sheets and breakdown
of the hydrograph boundary layer, J. Geophys. Res.-Earth, 122, 1513–1533, https://doi.org/10.1002/2016jf003994, 2017b. a
Benda, L.: The influence of debris flows on channels and valley floors in the
Oregon Coast Range, USA, Earth Surf. Proc. Land., 15, 457–466,
https://doi.org/10.1002/esp.3290150508, 1990. a
Benda, L. and Dunne, T.: Stochastic forcing of sediment supply to channel
networks from landsliding and debris flow, Water Resour. Res., 33,
2849–2863, https://doi.org/10.1029/97WR02388, 1997a. a
Benda, L., Hassan, M. A., Church, M., and May, C. L.: Geomorphology of
Steepland Headwaters: The Transition from Hillslopes to Channels, J.
Am. Water Resour. As., 41, 835–851,
https://doi.org/10.1111/j.1752-1688.2005.tb03773.x, 2005. a
Blom, A., Arkesteijn, L., Chavarrías, V., and Viparelli, E.: The
equilibrium alluvial river under variable flow and its channel-forming
discharge, J. Geophys. Res.-Earth, 122, 1924–1948,
https://doi.org/10.1002/2017jf004213, 2017. a, b
Brummer, C. J. and Montgomery, D. R.: Influence of coarse lag formation on
the
mechanics of sediment pulse dispersion in a mountain stream, Squire
Creek, North Cascades, Washington, United States, Water Resour.
Res., 42, W07412,
https://doi.org/10.1029/2005wr004776, 2006. a, b
Brunsden, D.: Applicable model of long term landform evolution, Z.
Geomorphol. Supp., 36, 16–26, 1980. a
Brunsden, D.: A critical assessment of the sensitivity concept in
geomorphology, Catena, 42, 99–123, https://doi.org/10.1016/s0341-8162(00)00134-x,
2001. a
Brunsden, D. and Thornes, J. B.: Landscape Sensitivity and Change, T.
I. Brit. Geogr., 4, 463–484, https://doi.org/10.2307/622210,
1979. a, b
Bull, W. B.: Geomorphic responses to climatic change, Oxford University
Press,
https://doi.org/10.2307/215397, 1991. a
Chartrand, S. M., Hassan, M. A., and Radić, V.: Pool-riffle
sedimentation
and surface texture trends in a gravel bed stream, Water Resour. Res.,
51, 8704–8728, https://doi.org/10.1002/2015wr017840, 2015. a
Church, M., Hassan, M. A., and Wolcott, J. F.: Stabilizing self-organized
structures in gravel-bed stream channels: Field and experimental
observations, Water Resour. Res., 34, 3169–3179,
https://doi.org/10.1029/98wr00484, 1998. a
Cienciala, P. and Hassan, M. A.: Linking spatial patterns of bed surface
texture, bed mobility, and channel hydraulics in a mountain stream to
potential spawning substrate for small resident trout, Geomorphology, 197,
96–107, https://doi.org/10.1016/j.geomorph.2013.04.041, 2013. a
Cui, Y. and Parker, G.: Numerical Model of Sediment Pulses and
Sediment-Supply
Disturbances in Mountain Rivers, J. Hydraul. Eng., 131,
646–656, https://doi.org/10.1061/(asce)0733-9429(2005)131:8(646), 2005. a, b
Cui, Y., Parker, G., Lisle, T. E., Gott, J., Hansler-Ball, M. E., Pizzuto,
J. E., Allmendinger, N. E., and Reed, J. M.: Sediment pulses in mountain
rivers: 1. Experiments, Water Resour. Res., 39, 1239,
https://doi.org/10.1029/2002wr001803, 2003. a
Cui, Y., Parker, G., Braudrick, C., Dietrich, W. E., and Cluer, B.: Dam
removal
express assessment models (DREAM). Part 1: model development and validation,
J. Hydraul. Res., 44, 291–307,
https://doi.org/10.1080/00221686.2006.9521683, 2006. a, b
Dietrich, W. E., Kirchner, J. W., Ikeda, H., and Iseya, F.: Sediment supply
and
the development of the coarse surface layer in gravel-bedded rivers, Nature,
340, 215–217, https://doi.org/10.1038/340215a0, 1989. a
Elgueta, M. A.: Channel adjustment of a gravel-bed stream under episodic
sediment supply regimes, Master's thesis, University of British Columbia,
https://doi.org/10.14288/1.0165847, 2014. a, b, c
Elgueta-Astaburuaga, M. A.: Effects of episodic sediment supply on channel
adjustment of an experimental gravel bed, PhD thesis, University of
British Columbia, https://doi.org/10.14288/1.0364558, 2018. a
Ferrer-Boix, C. and Hassan, M. A.: Influence of the sediment supply texture
on
morphological adjustments in gravel-bed rivers, Water Resour. Res., 50,
8868–8890, https://doi.org/10.1002/2013wr015117, 2014. a, b
Ferrer-Boix, C. and Hassan, M. A.: Channel adjustments to a succession of
water
pulses in gravel bed rivers, Water Resour. Res., 51, 8773–8790,
https://doi.org/10.1002/2015wr017664, 2015. a, b
Ferrer-Boix, C., Chartrand, S. M., Hassan, M. A., Martín-Vide, J. P.,
and Parker, G.: On how spatial variations of channel width influence river
profile curvature, Geophys. Res. Lett., 43, 6313–6323,
https://doi.org/10.1002/2016gl069824, 2016. a
Hassan, M. A. and Church, M.: Experiments on surface structure and partial
sediment transport on a gravel bed, Water Resour. Res., 36, 1885–1895,
https://doi.org/10.1029/2000wr900055, 2000. a
Hassan, M. A. and Zimmermann, A. E.: Channel Response and Recovery to Changes
in Sediment Supply, in: Gravel-Bed Rivers, John Wiley &
Sons, Ltd, 464–473, https://doi.org/10.1002/9781119952497.ch33, 2012. a
Hassan, M. A., Church, M., Lisle, T. E., Brardinoni, F., Benda, L., and
Grant, G. E.: Sediment Transport and Channel Morphology of Small, Forested
Streams,
J. Am. Water Resour. As., 41, 853–876,
https://doi.org/10.1111/j.1752-1688.2005.tb03774.x, 2005. a
Hassan, M. A., Gottesfeld, A. S., Montgomery, D. R., Tunnicliffe, J. F.,
Clarke, G. K. C., Wynn, G., Jones-Cox, H., Poirier, R., MacIsaac, E.,
Herunter, H., and Macdonald, S. J.: Salmon-driven bed load transport and bed
morphology in mountain streams, Geophys. Res. Lett., 35, L04405,
https://doi.org/10.1029/2007gl032997, 2008a. a
Hassan, M. A., Smith, B. J., Hogan, D. L., Luzi, D. S., Zimmermann, A. E.,
and
Eaton, B. C.: 18 Sediment storage and transport in coarse bed streams: scale
considerations, in: Gravel-Bed Rivers VI: From Process Understanding to
River Restoration, edited by Habersack, H. P. H. and Rinaldi, M.,
473–496, Elsevier, https://doi.org/10.1016/s0928-2025(07)11137-8, 2008b. a, b
Hoey, T. B. and Ferguson, R.: Numerical simulation of downstream fining by
selective transport in gravel bed rivers: Model development and illustration,
Water Resour. Res., 30, 2251–2260, https://doi.org/10.1029/94wr00556, 1994. a
Hoffman, D. F. and Gabet, E. J.: Effects of sediment pulses on channel
morphology in a gravel-bed river, Geol. Soc. Am. Bull.,
119, 116–125, https://doi.org/10.1130/b25982.1, 2007. a
Howard, A. D.: Equilibrium and time scales in geomorphology: Application to
sand-bed alluvial streams, Earth Surf. Proc. Land., 7,
303–325, https://doi.org/10.1002/esp.3290070403, 1982. a
Johnson, J. P. L., Aronovitz, A. C., and Kim, W.: Coarser and rougher:
Effects
of fine gravel pulses on experimental step-pool channel morphodynamics,
Geophys. Res. Lett., 42, 8432–8440, https://doi.org/10.1002/2015gl066097,
2015. a
Lisle, T. E. and Church, M.: Sediment transport-storage relations for
degrading, gravel bed channels, Water Resour. Res., 38, 1-1–1-14,
https://doi.org/10.1029/2001wr001086, 2002. a
Lisle, T. E., Pizzuto, J. E., Ikeda, H., Iseya, F., and Kodama, Y.: Evolution
of a sediment wave in an experimental channel, Water Resour. Res., 33,
1971–1981, https://doi.org/10.1029/97wr01180, 1997. a
Lisle, T. E., Cui, Y., Parker, G., Pizzuto, J. E., and Dodd, A. M.: The
dominance of dispersion in the evolution of bed material waves in gravel-bed
rivers, Earth Surf. Proc. Land., 26, 1409–1420,
https://doi.org/10.1002/esp.300, 2001. a
Luzi, D. S.: Sediment transport and morphological response of a semi-alluvial
channel: insights from a Froude scaled laboratory model, PhD thesis,
University of British Columbia, https://doi.org/10.14288/1.0165910, 2014. a
Madej, M. A.: Temporal and spatial variability in thalweg profiles of a
gravel-bed river, Earth Surf. Proc. Land., 24, 1153–1169,
https://doi.org/10.1002/(SICI)1096-9837(199911)24:12<1153::AID-ESP41>3.0.CO;2-8,
1999. a
Madej, M. A.: Development of channel organization and roughness following
sediment pulses in single-thread, gravel bed rivers, Water Resour.
Res., 37, 2259–2272, https://doi.org/10.1029/2001wr000229, 2001. a
Madej, M. A. and Ozaki, V.: Channel response to sediment wave propagation and
movement, Redwood Creek, California, USA, Earth Surf. Proc.
Land., 21, 911–927,
https://doi.org/10.1002/(sici)1096-9837(199610)21:10<911::aid-esp621>3.0.co;2-1, 1996. a
Miller, D. J. and Benda, L. E.: Effects of punctuated sediment supply on
valley-floor landforms and sediment transport, Geol. Soc. Am.
Bull., 112, 1814–1824,
https://doi.org/10.1130/0016-7606(2000)112<1814:eopsso>2.0.co;2, 2000. a
Nelson, P. A., Venditti, J. G., Dietrich, W. E., Kirchner, J. W., Ikeda, H.,
Iseya, F., and Sklar, L. S.: Response of bed surface patchiness to reductions
in sediment supply, J. Geophys. Res.-Earth, 114, F02005,
https://doi.org/10.1029/2008jf001144, 2009. a
Papangelakis, E. and Hassan, M. A.: The role of channel morphology on the
mobility and dispersion of bed sediment in a small gravel-bed stream, Earth
Surf. Proc. Land., 41, 2191–2206, https://doi.org/10.1002/esp.3980,
2016. a
Parker, G.: Selective Sorting and Abrasion of River Gravel. I: Theory, J.
Hydraul. Eng., 117, 131–147,
https://doi.org/10.1061/(asce)0733-9429(1991)117:2(131), 1991. a
Parker, G.: Transport of Gravel and Sediment Mixtures, in: Sedimentation
Engineering, American Society of Civil Engineers, vol. 110, 165–251,
https://doi.org/10.1061/9780784408148.ch03, 2008. a
Parker, G., Hassan, M., and Wilcock, P.: 10 Adjustment of the bed surface
size
distribution of gravel-bed rivers in response to cycled hydrographs, in:
Gravel-Bed Rivers VI: From Process Understanding to River Restoration,
Elsevier, 241–285, https://doi.org/10.1016/s0928-2025(07)11127-5, 2007. a
Podolak, C. J. P. and Wilcock, P. R.: Experimental study of the response of a
gravel streambed to increased sediment supply, Earth Surf. Proc.
Land., 38, 1748–1764, https://doi.org/10.1002/esp.3468, 2013.
a
Pryor, B. S., Lisle, T., Montoya, D. S., and Hilton, S.: Transport and
storage
of bed material in a gravel-bed channel during episodes of aggradation and
degradation: a field and flume study, Earth Surf. Proc. Land.,
36, 2028–2041, https://doi.org/10.1002/esp.2224, 2011. a, b, c
Recking, A.: Influence of sediment supply on mountain streams bedload
transport, Geomorphology, 175-176, 139–150,
https://doi.org/10.1016/j.geomorph.2012.07.005, 2012. a
Roberts, R. G. and Church, M.: The sediment budget in severely disturbed
watersheds, Queen Charlotte Ranges, British Columbia, Can. J.
Forest Res., 16, 1092–1106, https://doi.org/10.1139/x86-189, 1986. a
Sklar, L. S., Fadde, J., Venditti, J. G., Nelson, P., Wydzga, M. A., Cui, Y.,
and Dietrich, W. E.: Translation and dispersion of sediment pulses in flume
experiments simulating gravel augmentation below dams, Water Resour.
Res., 45, W08439. https://doi.org/10.1029/2008wr007346, 2009. a
Thomas, M. F.: Landscape sensitivity in time and space – an introduction,
Catena, 42, 83–98, https://doi.org/10.1016/s0341-8162(00)00133-8, 2001. a
Venditti, J. G., Dietrich, W. E., Nelson, P. A., Wydzga, M. A., Fadde, J.,
and
Sklar, L.: Effect of sediment pulse grain size on sediment transport rates
and bed mobility in gravel bed rivers, J. Geophys. Res.-Earth, 115, F03039, https://doi.org/10.1029/2009jf001418,
2010. a
Viparelli, E., Sequeiros, O. E., Cantelli, A., Wilcock, P. R., and Parker,
G.:
River morphodynamics with creation/consumption of grain size stratigraphy 2:
numerical model, J. Hydraul. Res., 48, 727–741,
https://doi.org/10.1080/00221686.2010.526759, 2010. a
von Flotow, C.: Temporal adjustments of a streambed following an episodic
sediment supply regime, Master's thesis, University of British
Columbia, https://doi.org/10.14288/1.007421, 2013. a, b, c
Wilcock, P. R.: Toward a practical method for estimating sediment-transport
rates in gravel-bed rivers, Earth Surf. Proc. Land., 26,
1395–1408, https://doi.org/10.1002/esp.301, 2001. a
Wilcock, P. R. and Crowe, J. C.: Surface-based Transport Model for Mixed-Size
Sediment, J. Hydraul. Eng., 129, 120–128,
https://doi.org/10.1061/(asce)0733-9429(2003)129:2(120), 2003. a, b
Wolman, M. G. and Miller, J. P.: Magnitude and Frequency of Forces in
Geomorphic Processes, J. Geol., 68, 54–74,
https://doi.org/10.1086/626637, 1960. a
Wong, M. and Parker, G.: One-dimensional modeling of bed evolution in a
gravel
bed river subject to a cycled flood hydrograph, J. Geophys.
Res.-Earth, 111, F03018, https://doi.org/10.1029/2006jf000478, 2006. a, b
Zimmermann, A. E., Church, M., and Hassan, M. A.: Video-based gravel
transport
measurements with a flume mounted light table, Earth Surf. Proc.
Land., 33, 2285–2296, 2008. a
Short summary
We used a numerical model to study how mountain streams adjust to series of sediment input events, e.g., landslides. We recreated flume experiments with similar scope and then expanded their parameter space, allowing us to find conditions under which the stream becomes overloaded with sediment. This occurs when the stream cannot evacuate a sediment input in the time between pulses. Our results can help to better understand the long-term adjustment of mountain streams to episodic sediment supply.
We used a numerical model to study how mountain streams adjust to series of sediment input...
