Articles | Volume 8, issue 2
https://doi.org/10.5194/esurf-8-413-2020
© Author(s) 2020. 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-8-413-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Jun 2020
Research article |
| 02 Jun 2020
| 02 Jun 2020
Morphological evolution of bifurcations in tide-influenced deltas
Department of Physical Geography, Faculty of Geosciences, Utrecht
University, Utrecht, 3508 TC, the Netherlands
Maarten van der Vegt
Department of Physical Geography, Faculty of Geosciences, Utrecht
University, Utrecht, 3508 TC, the Netherlands
Maarten G. Kleinhans
Department of Physical Geography, Faculty of Geosciences, Utrecht
University, Utrecht, 3508 TC, the Netherlands
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Sarah Hautekiet, Jan-Eike Rossius, Olivier Gourgue, Maarten Kleinhans, and Stijn Temmerman
Earth Surf. Dynam., 12, 601–619, https://doi.org/10.5194/esurf-12-601-2024, https://doi.org/10.5194/esurf-12-601-2024, 2024
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This study examined how vegetation growing in marshes affects the formation of tidal channel networks. Experiments were conducted to imitate marsh development, both with and without vegetation. The results show interdependency between biotic and abiotic factors in channel development. They mainly play a role when the landscape changes from bare to vegetated. Overall, the study suggests that abiotic factors are more important near the sea, while vegetation plays a larger role closer to the land.
Maarten G. Kleinhans, Lonneke Roelofs, Steven A. H. Weisscher, Ivar R. Lokhorst, and Lisanne Braat
Earth Surf. Dynam., 10, 367–381, https://doi.org/10.5194/esurf-10-367-2022, https://doi.org/10.5194/esurf-10-367-2022, 2022
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Floodplain formation in estuaries limit the ebb and flood flow, reducing channel migration and shortening the tidally influenced reach. Vegetation establishment on bars reduces local flow velocity and concentrates flow into channels, while mudflats fill accommodation space and reduce channel migration. These results are based on experimental estuaries in the Metronome facility supported by numerical flow modelling.
Sepehr Eslami, Piet Hoekstra, Herman W. J. Kernkamp, Nam Nguyen Trung, Dung Do Duc, Hung Nguyen Nghia, Tho Tran Quang, Arthur van Dam, Stephen E. Darby, Daniel R. Parsons, Grigorios Vasilopoulos, Lisanne Braat, and Maarten van der Vegt
Earth Surf. Dynam., 9, 953–976, https://doi.org/10.5194/esurf-9-953-2021, https://doi.org/10.5194/esurf-9-953-2021, 2021
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Increased salt intrusion jeopardizes freshwater supply to the Mekong Delta, and the current trends are often inaccurately associated with sea level rise. Using observations and models, we show that salinity is highly sensitive to ocean surge, tides, water demand, and upstream discharge. We show that anthropogenic riverbed incision has significantly amplified salt intrusion, exemplifying the importance of preserving sediment budget and riverbed levels to protect deltas against salt intrusion.
Steven A. H. Weisscher, Marcio Boechat-Albernaz, Jasper R. F. W. Leuven, Wout M. Van Dijk, Yasuyuki Shimizu, and Maarten G. Kleinhans
Earth Surf. Dynam., 8, 955–972, https://doi.org/10.5194/esurf-8-955-2020, https://doi.org/10.5194/esurf-8-955-2020, 2020
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Accurate and continuous data collection is challenging in physical scale experiments. A novel means to augment measurements is to numerically model flow over the experimental digital elevation maps. We tested this modelling approach for one tidal and two river scale experiments and showed that modelled water depth and flow velocity closely resemble the measurements. The implication is that conducting experiments requires fewer measurements and results in flow data of better overall quality.
Menno W. Straatsma, Jan M. Fliervoet, Johan A. H. Kabout, Fedor Baart, and Maarten G. Kleinhans
Nat. Hazards Earth Syst. Sci., 19, 1167–1187, https://doi.org/10.5194/nhess-19-1167-2019, https://doi.org/10.5194/nhess-19-1167-2019, 2019
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Climate adaptation of deltas is a hot topic given their high population density in many countries. We quantified trade-offs between hydraulics, potential biodiversity, implementation costs, and the number of land owners involved, using a newly developed tool called RiverScape. With our approach, we move towards finding integrated solutions at the scale of a large river in a delta to support the negotiations among stakeholders in the decision-making process.
Gonzalo Duró, Alessandra Crosato, Maarten G. Kleinhans, and Wim S. J. Uijttewaal
Earth Surf. Dynam., 6, 933–953, https://doi.org/10.5194/esurf-6-933-2018, https://doi.org/10.5194/esurf-6-933-2018, 2018
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The challenge to measure three-dimensional bank irregularities in a mid-sized river reach can be quickly solved in the field flying a drone with ground-control points and later applying structure from motion photogrammetry. We tested a simple approach that achieved sufficient resolution and accuracy to identify the full bank erosion cycle, including undermining. This is an easy-to-use and quickly deployed survey alternative to measure bank erosion processes along extended distances.
Ivar R. Lokhorst, Lisanne Braat, Jasper R. F. W. Leuven, Anne W. Baar, Mijke van Oorschot, Sanja Selaković, and Maarten G. Kleinhans
Earth Surf. Dynam., 6, 883–901, https://doi.org/10.5194/esurf-6-883-2018, https://doi.org/10.5194/esurf-6-883-2018, 2018
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In estuaries, mud sedimentation enhances salt marsh accretion. Here we explore system-scale effects of plants and mud on planform shape and size of estuaries. We coupled Delft3D for hydromorphodynamics with our vegetation model and ran controls for comparison. Effects are greatest at the fluvial–tidal transition, where for the first time in a model, a bedload convergence zone formed. Regardless of local vegetation effects, mud and vegetation cause gradual filling of estuaries over time.
Jasper R. F. W. Leuven, Sanja Selaković, and Maarten G. Kleinhans
Earth Surf. Dynam., 6, 763–778, https://doi.org/10.5194/esurf-6-763-2018, https://doi.org/10.5194/esurf-6-763-2018, 2018
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This paper reports the along-channel variability in occurring bed levels as described by hypsometry in natural estuaries. We found a novel relation between the estuary planform shape and the hypsometric function shape, which implies that it is possible to characterise and predict subwater estuarine morphology and bed levels in data-poor environments.
Jasper H. J. Candel, Maarten G. Kleinhans, Bart Makaske, Wim Z. Hoek, Cindy Quik, and Jakob Wallinga
Earth Surf. Dynam., 6, 723–741, https://doi.org/10.5194/esurf-6-723-2018, https://doi.org/10.5194/esurf-6-723-2018, 2018
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In this study we show how the Overijsselse Vecht river changed from a laterally stable to a meandering river ca. 500 years ago. We developed a methodology to reconstruct the historical discharge and found that the change in river style was caused by an increase in peak discharges. This increase was likely caused by the Little Ice Age and land use changes in the catchment (peat reclamation and exploitation). This study shows how river style changes as a result of discharge regime changes.
Maarten G. Kleinhans, Maarten van der Vegt, Jasper Leuven, Lisanne Braat, Henk Markies, Arjan Simmelink, Chris Roosendaal, Arjan van Eijk, Paul Vrijbergen, and Marcel van Maarseveen
Earth Surf. Dynam., 5, 731–756, https://doi.org/10.5194/esurf-5-731-2017, https://doi.org/10.5194/esurf-5-731-2017, 2017
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Creating estuaries in the laboratory has been challenging. When the ebb and flood currents are driven by ebb and flood in the sea, they are too weak to move sand. Here we describe how the periodic tilting of an entire experimental set-up leads to ebb and flood currents with similar behaviour as in nature and with enough strength to move sand. This means that this novel set-up now allows for the creation of estuarine landscapes in experiments.
Lisanne Braat, Thijs van Kessel, Jasper R. F. W. Leuven, and Maarten G. Kleinhans
Earth Surf. Dynam., 5, 617–652, https://doi.org/10.5194/esurf-5-617-2017, https://doi.org/10.5194/esurf-5-617-2017, 2017
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Mud raises concern in the short-term management of estuaries, but it is not known whether cohesive mud affects the long-term development of estuaries. We discovered that a small supply of mud from the river confines the estuary by forming stable mudflats on the sides in centuries, whereas estuaries with only sand continue to grow. Mudflats also reduce the shifting of channels and bars. This implies that changes in mud supply in estuaries may have led to changes in shape and dynamics in the past.
F. Schuurman, M. G. Kleinhans, and H. Middelkoop
Earth Surf. Dynam., 4, 25–45, https://doi.org/10.5194/esurf-4-25-2016, https://doi.org/10.5194/esurf-4-25-2016, 2016
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We studied the propagation of natural and human-induced perturbations in large braided sand-bed rivers using a physics-based 3-D model. The results show that the perturbations not only affect the local morphology but their effects amplify while propagating through the braided network. This occurs by destabilization of bifurcations in combination with reshaping of bars and branches. These results could have a major impact on the assessment of engineering measures in large braided sand-bed rivers.
W. A. Marra, S. J. McLelland, D. R. Parsons, B. J. Murphy, E. Hauber, and M. G. Kleinhans
Earth Surf. Dynam., 3, 389–408, https://doi.org/10.5194/esurf-3-389-2015, https://doi.org/10.5194/esurf-3-389-2015, 2015
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Groundwater seepage creates valleys with typical theater-shaped valley heads, which are found on Earth and on Mars. For a better interpretation of these systems, we conducted scale experiments on the formation such valleys. We find that entire landscapes, instead of just the shape of the valleys, provide insights into the source of groundwater. Landscapes filled with valleys indicate a local groundwater source in contrast to sparsely dissected landscapes formed by a distal source of groundwater.
M. G. Kleinhans, T.M. van Rosmalen, C. Roosendaal, and M. van der Vegt
Adv. Geosci., 39, 21–26, https://doi.org/10.5194/adgeo-39-21-2014, https://doi.org/10.5194/adgeo-39-21-2014, 2014
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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.
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
Alebregtse, N. C. and de Swart, H. E.: Effect of river discharge and
geometry on tides and net water transport in an estuarine network, an
idealized model applied to the Yangtze Estuary, Cont. Shelf Res., 123,
29–49, https://doi.org/10.1016/j.csr.2016.03.028, 2016.
Baar, A. W., de Smit, J., Uijttewaal, W. S. J., and Kleinhans, M. G.:
Sediment Transport of Fine Sand to Fine Gravel on Transverse Bed Slopes in
Rotating Annular Flume Experiments, Water Resour. Res., 54, 19–45,
https://doi.org/10.1002/2017WR020604, 2018.
Baar, A. W., Boechat Albernaz, M., van Dijk, W. M., and Kleinhans, M. G.:
Critical dependence of morphodynamic models of fluvial and tidal systems on
empirical downslope sediment transport, Nat. Commun., 10, 4903,
https://doi.org/10.1038/s41467-019-12753-x, 2019.
Bagnold, R. A.: An Approach to the Sediment Transport Problem from General
Physics, USGS Prof. Pap., 42, https://doi.org/10.1017/S0016756800049074, 1966.
Bertoldi, W. and Tubino, M.: River bifurcations: Experimental observations
on equilibrium configurations, Water Resour. Res., 43, W10437,
https://doi.org/10.1029/2007WR005907, 2007.
Blondeaux, P. and Seminara, G.: A unified bar–bend theory of river
meanders, J. Fluid Mech., 157, 449–470,
https://doi.org/10.1017/S0022112085002440, 1985.
Bolla Pittaluga, M., Repetto, R., and Tubino, M.: Channel bifurcation in
braided rivers: Equilibrium configurations and stability, Water Resour.
Res., 39, 1–13, https://doi.org/10.1029/2003WR002754, 2003.
Bolla Pittaluga, M., Coco, G., and Kleinhans, M. G.: A unified framework for
stability of channel bifurcations in gravel and sand fluvial systems,
Geophys. Res. Lett., 42, 7521–7536, https://doi.org/10.1002/2015GL065175, 2015.
Buschman, F. A., Hoitink, A. J. F., van der Vegt, M., and Hoekstra, P.:
Subtidal flow division at a shallow tidal junction, Water Resour. Res.,
46, W12515, https://doi.org/10.1029/2010WR009266, 2010.
Buschman, F. A., van der Vegt, M., Hoitink, A. J. F., and Hoekstra, P.: Water
and suspended sediment division at a stratified tidal junction, J. Geophys.
Res.-Ocean., 118, 1459–1472, https://doi.org/10.1002/jgrc.20124, 2013.
Chen, J. Y., Yun, C. X., and Xu, H.: The model of development of the Changjiang estuary during the last 2000 years, in Proceedings of the Sixth Biennial International Estuarine Research Conference, 655–666, 1982.
Daniel, G., Brad, H., Miodrag, S., Forrest, H., Hasan, P., and Nolan, R.:
Application of 3D Mobile Bed, Hydrodynamic Model, J. Hydraul. Eng., 125,
737–749, https://doi.org/10.1061/(ASCE)0733-9429(1999)125:7(737), 1999.
Dissanayake, D. M. P. K., Roelvink, J. A., and van der Wegen, M.: Modelled
channel patterns in a schematized tidal inlet, Coast. Eng., 56,
1069–1083, https://doi.org/10.1016/j.coastaleng.2009.08.008, 2009.
Edmonds, D. A. and Slingerland, R. L.: Mechanics of river mouth bar
formation: Implications for the morphodynamics of delta distributary
networks, J. Geophys. Res.-Earth, 112, F02034, https://doi.org/10.1029/2006JF000574, 2007.
Frings, R. M. and Kleinhans, M. G.: Complex variations in sediment transport
at three large river bifurcations during discharge waves in the river Rhine,
Sedimentology, 55, 1145–1171, https://doi.org/10.1111/j.1365-3091.2007.00940.x, 2008.
Galloway, W. E.: Process framework for describing the morphologic and stratigraphic evolution of deltaic depositional systems, in Deltas: Models for Exploration, edited by: Broussard, M. L., 87–98, Houston Geological Society, Houston, Texas, 1975.
Geleynse, N., Storms, J. E. A., Walstra, D. J. R., Jagers, H. R. A., Wang,
Z. B., and Stive, M. J. F.: Controls on river delta formation; insights from
numerical modelling, Earth Planet. Sci. Lett., 302, 217–226,
https://doi.org/10.1016/j.epsl.2010.12.013, 2011.
Hoitink, A. J. F., Wang, Z. B., Vermeulen, B., Huismans, Y., and Kästner,
K.: Tidal controls on river delta morphology, Nat. Geosci., 10, 637–645,
https://doi.org/10.1038/ngeo3000, 2017.
Ikeda, S.: Incipient Motion of Sand Particles on Side Slopes, J. Hydraul.
Div., 108, 95–114, 1982.
Jerolmack, D. J.: Conceptual framework for assessing the response of delta
channel networks to Holocene sea level rise, Quaternary Sci. Rev., 28,
1786–1800,
https://doi.org/10.1016/j.quascirev.2009.02.015, 2009.
Kästner, K., Hoitink, A. J. F., Vermeulen, B., Geertsema, T. J., and
Ningsih, N. S.: Distributary channels in the fluvial to tidal transition
zone, J. Geophys. Res.-Earth, 122, 696–710,
https://doi.org/10.1002/2016JF004075, 2017.
Kleinhans, M. G. and van den Berg, J. H.: River channel and bar patterns
explained and predicted by an empirical and a physics-based method, Earth
Surf. Proc. Land., 36, 721–738, https://doi.org/10.1002/esp.2090, 2011.
Kleinhans, M. G., Jagers, H. R. A., Mosselman, E., and Sloff, C. J.:
Bifurcation dynamics and avulsion duration in meandering rivers by
one-dimensional and three-dimensional models, Water Resour. Res., 44,
1–31, https://doi.org/10.1029/2007WR005912, 2008.
Kleinhans, M. G., Ferguson, R. I., Lane, S. N., and Hardy, R. J.: Splitting
rivers at their seams: Bifurcations and avulsion, Earth Surf. Proc.
Land., 38, 47–61, https://doi.org/10.1002/esp.3268, 2013.
Lane, S. N., Bradbrook, K. F., Richards, K. S., Biron, P. A., and Roy, A. G.:
The application of computational fluid dynamics to natural river channels:
three-dimensional versus two-dimensional approaches, Geomorphology, 29,
1–20, https://doi.org/10.1016/S0169-555X(99)00003-3, 1999.
Leonardi, N., Canestrelli, A., Sun, T., and Fagherazzi, S.: Effect of tides
on mouth bar morphology and hydrodynamics, J. Geophys. Res.-Oceans, 118, 4169–4183,
https://doi.org/10.1002/jgrc.20302, 2013.
Lesser, G. R., Roelvink, J. A., van Kester, J. A. T. M., and Stelling, G. S.:
Development and validation of a three-dimensional morphological model,
Coast. Eng., 51, 883–915, https://doi.org/10.1016/j.coastaleng.2004.07.014, 2004.
Miori, S., Repetto, R., and Tubino, M.: A one-dimensional model of
bifurcations in gravel bed channels with erodible banks, Water Resour. Res.,
42, W11413, https://doi.org/10.1029/2006WR004863, 2006.
Nnafie, A., Van Oyen, T., De Maerschalck, B., van der Vegt, M., and van der
Wegen, M.: Estuarine Channel Evolution in Response to Closure of Secondary
Basins: An Observational and Morphodynamic Modeling Study of the Western
Scheldt Estuary, J. Geophys. Res.-Earth, 123,
167–186, https://doi.org/10.1002/2017JF004364,
2018.
Redolfi, M., Zolezzi, G., and Tubino, M.: Free instability of channel
bifurcations and morphodynamic influence, J. Fluid Mech., 799, 476–504,
https://doi.org/10.1017/jfm.2016.389, 2016.
Redolfi, M., Zolezzi, G., and Tubino, M.: Free and forced morphodynamics of
river bifurcations, Earth Surf. Proc. Land., 44, 973–987,
https://doi.org/10.1002/esp.4561, 2019.
Roelvink, J. A.: Coastal morphodynamic evolution techniques, Coast. Eng.,
53, 277–287, https://doi.org/10.1016/j.coastaleng.2005.10.015, 2006.
Rossi, V. M., Kim, W., López, J. L., Edmonds, D., Geleynse, N., Olariu,
C., Steel, R. J., Hiatt, M., and Passalacqua, P.: Impact of tidal currents on
delta-channel deepening, stratigraphic architecture, and sediment bypass
beyond the shoreline, Geology, 44, 927–930, https://doi.org/10.1130/G38334.1, 2016.
Salter, G., Paola, C., and Voller, V. R.: Control of Delta Avulsion by
Downstream Sediment Sinks, J. Geophys. Res.-Earth, 123, 142–166,
https://doi.org/10.1002/2017JF004350, 2017.
Sassi, M. G., Hoitink, A. J. F., De Brye, B., Vermeulen, B., and
Deleersnijder, E.: Tidal impact on the division of river discharge over
distributary channels in the Mahakam Delta, Ocean Dynam., 61, 2211–2228,
https://doi.org/10.1007/s10236-011-0473-9, 2011.
Schuurman, F., Marra, W. A., and Kleinhans, M. G.: Physics-based modeling of
large braided sand-bed rivers: Bar pattern formation, dynamics, and
sensitivity, J. Geophys. Res.-Earth, 118, 2509–2527,
https://doi.org/10.1002/2013JF002896, 2013.
Shaw, J. B. and Mohrig, D.: The importance of erosion in distributary
channel network growth, Wax Lake Delta, Louisiana, USA, Geology, 42, 31–34,
https://doi.org/10.1130/G34751.1, 2014.
Stephens, J. D., Allison, M. A., Di Leonardo, D. R., Weathers, H. D.,
Ogston, A. S., McLachlan, R. L., Xing, F., and Meselhe, E. A.: Sand dynamics
in the Mekong River channel and export to the coastal ocean, Cont. Shelf
Res., 147, 38–50, https://doi.org/10.1016/j.csr.2017.08.004, 2017.
Struiksma, N., Olesen, K. W., Flokstra, C., and De Vriend, H. J.: Bed
deformation in curved alluvial channels, J. Hydraul. Res., 23, 57–79,
https://doi.org/10.1080/00221688509499377, 1985.
Syvitski, J. P. M. and Milliman, J. D.: Geology, geography, and humans
battle for dominance over the delivery of fluvial sediment to the coastal
ocean, J. Geol., 115, 1–19, https://doi.org/10.1086/509246, 2007.
Talmon, A. M., Struiksma, N., and Van Mierlo, M. C. L. M.: Laboratory
measurements of the direction of sediment transport on transverse
alluvial-bed slopes, J. Hydraul. Res., 33, 495–517,
https://doi.org/10.1080/00221689509498657, 1995.
Wang, Z. B., De Vries, M., Fokkink, R. J., and Langerak, A.: Stability of
river bifurcations in ID morphodynamic models, J. Hydraul. Res., 33,
739–750, https://doi.org/10.1080/00221689509498549, 1995.
van Der Wegen, M.: Numerical modeling of the impact of sea level rise on
tidal basin morphodynamics, J. Geophys. Res.-Earth, 118,
447–460,
https://doi.org/10.1002/jgrf.20034, 2013.
van Der Wegen, M. and Roelvink, J. A.: Long-term morphodynamic evolution of
a tidal embayment using a two-dimensional, process-based model, J. Geophys.
Res.-Ocean., 113, 1–23, https://doi.org/10.1029/2006JC003983, 2008.
van der Wegen, M. and Roelvink, J. A.: Reproduction of estuarine bathymetry
by means of a process-based model: Western Scheldt case study, the
Netherlands, Geomorphology, 179, 152–167,
https://doi.org/10.1016/j.geomorph.2012.08.007, 2012.
van der Wegen, M., Wang, Z. B., Savenije, H. H. G., and Roelvink, J. A.:
Long-term morphodynamic evoluation and energy dissipation in a coastal
plain, tidal embayment, J. Geophys. Res.-Earth, 113, F03001,
https://doi.org/10.1029/2007JF000898, 2008.
van Rijn, L. C.: Principles of Sediment Transport in Rivers, Estuaries and Coastal Seas, Aqua Publications, Amsterdam, 1993.
Zhang, E. F., Savenije, H. H. G., Chen, S. L., and Mao, X. H.: An analytical solution for tidal propagation in the Yangtze Estuary, China, Hydrol. Earth Syst. Sci., 16, 3327–3339, https://doi.org/10.5194/hess-16-3327-2012, 2012.
Short summary
We investigated the effect of tides on the morphodynamic evolution of bifurcations in tide-influenced deltas. Using results from a numerical morphodynamic model (Delft3D), we found that tides cause less asymmetric bifurcations and thereby keep both downstream channels open. Our results explain why avulsion rarely occurs in tide-influenced deltas, whereas it occurs more often in river-dominated deltas.
We investigated the effect of tides on the morphodynamic evolution of bifurcations in...
