Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-405-2023
© Author(s) 2023. 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-11-405-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 May 2023
Research article |
| 09 May 2023
| 09 May 2023
Impacts of human modifications on material transport in deltas
Jayaram Hariharan
Department of Civil, Architectural and Environmental Engineering, Center for Water and the Environment, University of Texas at Austin, Austin, Texas, USA
Kyle Wright
Department of Civil, Architectural and Environmental Engineering, Center for Water and the Environment, University of Texas at Austin, Austin, Texas, USA
Andrew Moodie
Department of Civil, Architectural and Environmental Engineering, Center for Water and the Environment, University of Texas at Austin, Austin, Texas, USA
Nelson Tull
Department of Civil, Architectural and Environmental Engineering, Center for Water and the Environment, University of Texas at Austin, Austin, Texas, USA
Paola Passalacqua
CORRESPONDING AUTHOR
Department of Civil, Architectural and Environmental Engineering, Center for Water and the Environment, University of Texas at Austin, Austin, Texas, USA
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Matthew Preisser, Paola Passalacqua, R. Patrick Bixler, and Julian Hofmann
Hydrol. Earth Syst. Sci., 26, 3941–3964, https://doi.org/10.5194/hess-26-3941-2022, https://doi.org/10.5194/hess-26-3941-2022, 2022
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There is rising concern in numerous fields regarding the inequitable distribution of human risk to floods. The co-occurrence of river and surface flooding is largely excluded from leading flood hazard mapping services, therefore underestimating hazards. Using high-resolution elevation data and a region-specific social vulnerability index, we developed a method to estimate flood impacts at the household level in near-real time.
Mariela Perignon, Jordan Adams, Irina Overeem, and Paola Passalacqua
Earth Surf. Dynam., 8, 809–824, https://doi.org/10.5194/esurf-8-809-2020, https://doi.org/10.5194/esurf-8-809-2020, 2020
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We propose a machine learning approach for the classification and analysis of large delta systems. The approach uses remotely sensed data, channel network extraction, and the analysis of 10 metrics to identify clusters of islands with similar characteristics. The 12 clusters are grouped in six main classes related to morphological processes acting on the system. The approach allows us to identify spatial patterns in large river deltas to inform modeling and the collection of field observations.
M. Liang, N. Geleynse, D. A. Edmonds, and P. Passalacqua
Earth Surf. Dynam., 3, 87–104, https://doi.org/10.5194/esurf-3-87-2015, https://doi.org/10.5194/esurf-3-87-2015, 2015
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In this work we assess the flow-routing component (FlowRCM) of our delta formation model, DeltaRCM. We found that with the level of complexity reduction, FlowRCM is able to produce channel network-scale hydrodynamic details, which provide further insights into the connection between delta flow structures and the morphodynamic outcome.
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Andrew Hollyday, Maureen E. Raymo, Jacqueline Austermann, Fred Richards, Mark Hoggard, and Alessio Rovere
Earth Surf. Dynam., 12, 883–905, https://doi.org/10.5194/esurf-12-883-2024, https://doi.org/10.5194/esurf-12-883-2024, 2024
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Sea level was significantly higher during the Pliocene epoch, around 3 million years ago. The present-day elevations of shorelines that formed in the past provide a data constraint on the extent of ice sheet melt and the global sea level response under warm Pliocene conditions. In this study, we identify 10 escarpments that formed from wave-cut erosion during Pliocene times and compare their elevations with model predictions of solid Earth deformation processes to estimate past sea level.
Gregory A. Ruetenik, Ken L. Ferrier, and Odin Marc
Earth Surf. Dynam., 12, 863–881, https://doi.org/10.5194/esurf-12-863-2024, https://doi.org/10.5194/esurf-12-863-2024, 2024
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Fluvial sediment fluxes increased dramatically in Taiwan during Typhoon Morakot in 2009, which produced some of the heaviest landsliding on record. We analyzed fluvial discharge and suspended sediment concentration data at 87 gauging stations across Taiwan to quantify fluvial sediment responses since Morakot. In basins heavily impacted by landsliding, rating curve coefficients sharply increased during Morakot and then declined exponentially with a characteristic decay time of <10 years.
Nil Carrion-Bertran, Albert Falqués, Francesca Ribas, Daniel Calvete, Rinse de Swart, Ruth Durán, Candela Marco-Peretó, Marta Marcos, Angel Amores, Tim Toomey, Àngels Fernández-Mora, and Jorge Guillén
Earth Surf. Dynam., 12, 819–839, https://doi.org/10.5194/esurf-12-819-2024, https://doi.org/10.5194/esurf-12-819-2024, 2024
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The sensitivity to the wave and sea-level forcing sources in predicting a 6-month embayed beach evolution is assessed using two different morphodynamic models. After a successful model calibration using in situ data, other sources are applied. The wave source choice is critical: hindcast data provide wrong results due to an angle bias, whilst the correct dynamics are recovered with the wave conditions from an offshore buoy. The use of different sea-level sources gives no significant differences.
Thomas J. Barnes, Thomas V. Schuler, Simon Filhol, and Karianne S. Lilleøren
Earth Surf. Dynam., 12, 801–818, https://doi.org/10.5194/esurf-12-801-2024, https://doi.org/10.5194/esurf-12-801-2024, 2024
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In this paper, we use machine learning to automatically outline landforms based on their characteristics. We test several methods to identify the most accurate and then proceed to develop the most accurate to improve its accuracy further. We manage to outline landforms with 65 %–75 % accuracy, at a resolution of 10 m, thanks to high-quality/high-resolution elevation data. We find that it is possible to run this method at a country scale to quickly produce landform inventories for future studies.
Eric Petersen, Regine Hock, and Michael G. Loso
Earth Surf. Dynam., 12, 727–745, https://doi.org/10.5194/esurf-12-727-2024, https://doi.org/10.5194/esurf-12-727-2024, 2024
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Ice cliffs are melt hot spots that increase melt rates on debris-covered glaciers which otherwise see a reduction in melt rates. In this study, we show how surface runoff streams contribute to the generation, evolution, and survival of ice cliffs by carving into the glacier and transporting rocky debris. On Kennicott Glacier, Alaska, 33 % of ice cliffs are actively influenced by streams, while nearly half are within 10 m of streams.
Daniel O'Hara, Liran Goren, Roos M. J. van Wees, Benjamin Campforts, Pablo Grosse, Pierre Lahitte, Gabor Kereszturi, and Matthieu Kervyn
Earth Surf. Dynam., 12, 709–726, https://doi.org/10.5194/esurf-12-709-2024, https://doi.org/10.5194/esurf-12-709-2024, 2024
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Understanding how volcanic edifices develop drainage basins remains unexplored in landscape evolution. Using digital evolution models of volcanoes with varying ages, we quantify the geometries of their edifices and associated drainage basins through time. We find that these metrics correlate with edifice age and are thus useful indicators of a volcano’s history. We then develop a generalized model for how volcano basins develop and compare our results to basin evolution in other settings.
Brayden Noh, Omar Wani, Kieran B. J. Dunne, and Michael P. Lamb
Earth Surf. Dynam., 12, 691–708, https://doi.org/10.5194/esurf-12-691-2024, https://doi.org/10.5194/esurf-12-691-2024, 2024
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In this paper, we propose a framework for generating risk maps that provide the probabilities of erosion due to river migration. This framework uses concepts from probability theory to learn the river migration model's parameter values from satellite data while taking into account parameter uncertainty. Our analysis shows that such geomorphic risk estimation is more reliable than models that do not explicitly consider various sources of variability and uncertainty.
Steven Y. J. Lai, David Amblas, Aaron Micallef, and Hervé Capart
Earth Surf. Dynam., 12, 621–640, https://doi.org/10.5194/esurf-12-621-2024, https://doi.org/10.5194/esurf-12-621-2024, 2024
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This study explores the creation of submarine canyons and hanging-wall fans on active faults, which can be defined by gravity-dominated breaching and underflow-dominated diffusion processes. The study reveals the self-similarity in canyon–fan long profiles, uncovers Hack’s scaling relationship and proposes a formula to estimate fan volume using canyon length. This is validated by global data from source-to-sink systems, providing insights into deep-water sedimentary processes.
Anuska Narayanan, Sagy Cohen, and John R. Gardner
Earth Surf. Dynam., 12, 581–599, https://doi.org/10.5194/esurf-12-581-2024, https://doi.org/10.5194/esurf-12-581-2024, 2024
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This study investigates the profound impact of deforestation in the Amazon on sediment dynamics. Novel remote sensing data and statistical analyses reveal significant changes, especially in heavily deforested regions, with rapid effects within a year. In less disturbed areas, a 1- to 2-year lag occurs, influenced by natural sediment shifts and human activities. These findings highlight the need to understand the consequences of human activity for our planet's future.
Jacob Hardt, Tim P. Dooley, and Michael R. Hudec
Earth Surf. Dynam., 12, 559–579, https://doi.org/10.5194/esurf-12-559-2024, https://doi.org/10.5194/esurf-12-559-2024, 2024
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We investigate the reaction of salt structures on ice sheet transgressions. We used a series of sandbox models that enabled us to experiment with scaled-down versions of salt bodies from northern Germany. The strongest reactions occurred when large salt pillows were partly covered by the ice load. Subsurface salt structures may play an important role in the energy transition, e.g., as energy storage. Thus, it is important to understand all processes that affect their stability.
Prakash Pokhrel, Mikael Attal, Hugh D. Sinclair, Simon M. Mudd, and Mark Naylor
Earth Surf. Dynam., 12, 515–536, https://doi.org/10.5194/esurf-12-515-2024, https://doi.org/10.5194/esurf-12-515-2024, 2024
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Pebbles become increasingly rounded during downstream transport in rivers due to abrasion. This study quantifies pebble roundness along the length of two Himalayan rivers. We demonstrate that roundness increases with downstream distance and that the rates are dependent on rock type. We apply this to reconstructing travel distances and hence the size of ancient Himalaya. Results show that the ancient river network was larger than the modern one, indicating that there has been river capture.
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
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Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Daniel J. Ciarletta, Jennifer L. Miselis, Julie C. Bernier, and Arnell S. Forde
Earth Surf. Dynam., 12, 449–475, https://doi.org/10.5194/esurf-12-449-2024, https://doi.org/10.5194/esurf-12-449-2024, 2024
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We reconstructed the evolution of Fire Island, a barrier island in New York, USA, to identify drivers of landscape change. Results reveal Fire Island was once divided into multiple inlet-separated islands with distinct features. Later, inlets closed, and Fire Island’s landscape became more uniform as human activities intensified. The island is now less mobile and less likely to resist and recover from storm impacts and sea level rise. This vulnerability may exist for other stabilized barriers.
Chao Zhou, Xibin Tan, Yiduo Liu, and Feng Shi
Earth Surf. Dynam., 12, 433–448, https://doi.org/10.5194/esurf-12-433-2024, https://doi.org/10.5194/esurf-12-433-2024, 2024
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The drainage-divide stability provides new insights into both the river network evolution and the tectonic and/or climatic changes. Several methods have been proposed to determine the direction of drainage-divide migration. However, how to quantify the migration rate of drainage divides remains challenging. In this paper, we propose a new method to calculate the migration rate of drainage divides from high-resolution topographic data.
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
Earth Surf. Dynam., 12, 399–431, https://doi.org/10.5194/esurf-12-399-2024, https://doi.org/10.5194/esurf-12-399-2024, 2024
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We show a long-term erosion monitoring of several sections on Little Ice Age lateral moraines with derived sediment yield from historical and current digital elevation modelling (DEM)-based differences. The first study period shows a clearly higher range of variability of sediment yield within the sites than the later periods. In most cases, a decreasing trend of geomorphic activity was observed.
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.
Kate C. P. Leary, Leah Tevis, and Mark Schmeeckle
Earth Surf. Dynam., 11, 835–847, https://doi.org/10.5194/esurf-11-835-2023, https://doi.org/10.5194/esurf-11-835-2023, 2023
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Despite the importance of bedforms (e.g., ripples, dunes) to sediment transport, the details of sediment transport on a sub-bedform scale are poorly understood. This paper investigates sediment transport in the downstream and cross-stream directions over bedforms with straight crests. We find that the patterns of bedload transport are highly variable on the sub-bedform scale, which is important for our understanding of the evolution of bedforms with complex crest geometries.
Cited articles
Al Masud, M. M., Gain, A. K., and Azad, A. K.: Tidal river management for sustainable agriculture in the Ganges-Brahmaputra delta: Implication for land use policy, Land Use Policy, 92, 104443, https://doi.org/10.1016/j.landusepol.2019.104443, 2020. a
Angamuthu, B., Darby, S. E., and Nicholls, R. J.: Impacts of natural and human drivers on the multi-decadal morphological evolution of tidally-influenced deltas, P. Roy. Soc. A-Math. Phy., 474, 20180396, https://doi.org/10.1098/rspa.2018.0396, 2018. a, b
Anthony, E. J.: Wave influence in the construction, shaping and destruction of river deltas: A review, Mar. Geol., 361, 53–78, https://doi.org/10.1016/j.margeo.2014.12.004, 2015. a, b
Auerbach, L. W., Goodbred Jr., S. L., Mondal, D. R., Wilson, C. A., Ahmed, K. R., Roy, K., Steckler, M. S., Small, C., Gilligan, J. M., and Ackerly, B. A.: Flood risk of natural and embanked landscapes on the Ganges–Brahmaputra tidal delta plain, Nat. Clim. Change, 5, 153–157, https://doi.org/10.1038/nclimate2472, 2015. a, b
Bain, R. L., Hale, R. P., and Goodbred, S. L.: Flow Reorganization in an Anthropogenically Modified Tidal Channel Network: An Example From the Southwestern Ganges-Brahmaputra-Meghna Delta, J. Geophys. Res.-Earth, 124, 2141–2159, https://doi.org/10.1029/2018JF004996, 2019. a, b
Banas, N. S., MacCready, P., and Hickey, B. M.: The Columbia River plume as cross-shelf exporter and along-coast barrier, Cont. Shelf Res., 29, 292–301, https://doi.org/10.1016/j.csr.2008.03.011, 2009. a
Bates, P. D.: Flood Inundation Prediction, Annu. Rev. Fluid Mech., 54, 287–315, https://doi.org/10.1146/annurev-fluid-030121-113138, 2022. a
Cai, H., Savenije, H. H. G., Yang, Q., Ou, S., and Lei, Y.: Influence of River Discharge and Dredging on Tidal Wave Propagation: Modaomen Estuary Case, J. Hydraul. Eng., 138, 885–896, https://doi.org/10.1061/(asce)hy.1943-7900.0000594, 2012. a, b
Chamberlain, E. L., Shen, Z., Kim, W., McKinley, S., Anderson, S., and Törnqvist, T. E.: Does Load-Induced Shallow Subsidence Inhibit Delta Growth?, J. Geophys. Res.-Earth, 126, e2021JF006153, https://doi.org/10.1029/2021JF006153, 2021. a
Chow, V. T.: Open-channel hydraulics, McGraw-Hill civil engineering series, McGraw-Hill, 1959. a
Christensen, A., Twilley, R. R., Willson, C. S., and Castañeda-Moya, E.: Simulating hydrological connectivity and water age within a coastal deltaic floodplain of the Mississippi River Delta, Estuar. Coast. Shelf S., 245, 106995, https://doi.org/10.1016/j.ecss.2020.106995, 2020. a, b
Dagestad, K.-F., Röhrs, J., Breivik, Ø., and Ådlandsvik, B.: OpenDrift v1.0: a generic framework for trajectory modelling, Geosci. Model Dev., 11, 1405–1420, https://doi.org/10.5194/gmd-11-1405-2018, 2018. a
Day, J. W., Britsch, L. D., Hawes, S. R., Shaffer, G. P., Reed, D. J., and Cahoon, D.: Pattern and process of land loss in the Mississippi Delta: A spatial and temporal analysis of wetland habitat change, Estuaries, 23, 425–438, https://doi.org/10.2307/1353136, 2000. a, b
Day, J. W., Gunn, J. D., Folan, W. J., Yáñez-Arancibia, A., and Horton, B. P.: Emergence of complex societies after sea level stabilized, Eos T. Am. Geophys. Un., 88, 169–170, https://doi.org/10.1029/2007EO150001, 2007. a
de Brauwere, A., de Brye, B., Blaise, S., and Deleersnijder, E.: Residence time, exposure time and connectivity in the Scheldt Estuary, J. Marine Syst., 84, 85–95, https://doi.org/10.1016/j.jmarsys.2010.10.001, 2011. a
Durand, J. R.: Evaluating the aquatic habitat potential of flooded polders in the Sacramento-San Joaquin Delta, San Francisco Estuary and Watershed Science, 15, 4, https://doi.org/10.15447/sfews.2017v15iss4art4, 2017. a
Edmonds, D. A. and Slingerland, R. L.: Significant effect of sediment cohesion on deltamorphology, Nat. Geosci., 3, 105–109, https://doi.org/10.1038/ngeo730, 2010. a, b
Edmonds, D. A., Paola, C., Hoyal, D. C., and Sheets, B. A.: Quantitative metrics that describe river deltas and their channel networks, J. Geophys. Res.-Earth, 116, F04022, https://doi.org/10.1029/2010JF001955, 2011. a
Edmonds, D. A., Caldwell, R. L., Brondizio, E. S., and Siani, S. M.: Coastal flooding will disproportionately impact people on river deltas, Nat. Commun., 11, 1–8, https://doi.org/10.1038/s41467-020-18531-4, 2020. a
Ellery, W. N. and McCarthy, T. S.: Environmental change over two decades since dredging and excavation of the lower Boro River, Okavango Delta, Botswana, J. Biogeogr., 25, 361–378, https://doi.org/10.1046/j.1365-2699.1998.252168.x, 1998. a, b
Esposito, C. R., Georgiou, I. Y., and Straub, K. M.: Flow Loss in Deltaic Distributaries: Impacts on Channel Hydraulics, Morphology, and Stability, Water Resour. Res., 56, e2019WR026463, https://doi.org/10.1029/2019WR026463, 2020. a
Geleynse, N., Storms, J. E., Walstra, D. J. R., Jagers, H. R., Wang, Z. B., and Stive, M. J.: Controls on river delta formation; insights from numerical modelling, Earth Planet. Sc. Lett., 302, 217–226, https://doi.org/10.1016/j.epsl.2010.12.013, 2011. a
Hariharan, J., Xu, Z., Michael, H. A., Paola, C., Steel, E., and Passalacqua, P.: Linking the Surface and Subsurface in River Deltas – Part 1: Relating Surface and Subsurface Geometries, Water Resour. Res., 57, e2020WR029282, https://doi.org/10.1029/2020WR029282, 2021. a, b, c, d
Hariharan, J., Wright, K., and Passalacqua, P.: dorado v2.5.1, Zenodo [code], https://doi.org/10.5281/zenodo.6454729, 2022a. a
Hariharan, J., Wright, K., Moodie, A., Tull, N., and Passalacqua, P.: Videos For Impacts of Human Modifications on Material Transport in Deltas, OSF [video supplement], https://doi.org/10.17605/OSF.IO/D95ZN, 2022b. a
Hiatt, M. and Passalacqua, P.: Hydrological connectivity in river deltas: The first-order importance of channel-island exchange, Water Resour. Res., 51, 2264–2282, https://doi.org/10.1002/2014WR016149, 2015. a, b
Higgins, S. A., Overeem, I., Rogers, K. G., and Kalina, E. A.: River linking in India: Downstream impacts on water discharge and suspended sediment transport to deltas, Elementa, 6, 20, https://doi.org/10.1525/elementa.269, 2018. a
Hoyal, D. C. and Sheets, B. A.: Morphodynamic evolution of experimental cohesive deltas, J. Geophys. Res.-Earth, 114, 2009, https://doi.org/10.1029/2007JF000882, 2009. a
Kain, C. L., Lewarn, B., Rigby, E. H., and Mazengarb, C.: Tsunami Inundation and Maritime Hazard Modelling for a Maximum Credible Tsunami Scenario in Southeast Tasmania, Australia, Pure Appl. Geophys., 177, 1549–1568, https://doi.org/10.1007/s00024-019-02384-0, 2020. a
Kerner, M.: Effects of deepening the Elbe Estuary on sediment regime and water quality, Estuar. Coast. Shelf S., 75, 492–500, https://doi.org/10.1016/j.ecss.2007.05.033, 2007. a
Khadim, F. K., Kar, K. K., Halder, P. K., Rahman, M. A., and Morshed, A. M.: Integrated Water Resources Management (IWRM) Impacts in South West Coastal Zone of Bangladesh and Fact-Finding on Tidal River Management (TRM), Journal of Water Resource and Protection, 5, 953–961, https://doi.org/10.4236/jwarp.2013.510098, 2013. a
Kim, W., Mohrig, D., Twilley, R. R., Paola, C., and Parker, G.: Is it feasible to build new land in the Mississippi River delta?, Eos T. Am. Geophys. Un., 90, 373–374, 2009. a
Knights, D., Sawyer, A. H., Barnes, R. T., Piliouras, A., Schwenk, J., Edmonds, D. A., and Brown, A. M.: Nitrate Removal Across Ecogeomorphic Zones in Wax Lake Delta, Louisiana (USA), Water Resour. Res., 56, e2019WR026867, https://doi.org/10.1029/2019WR026867, 2020. a, b
Knights, D., Sawyer, A. H., Edmonds, D. A., Olliver, E. A., and Barnes, R. T.: The relationship between delta form and nitrate retention revealed by numerical modeling experiments, Water Resour. Res., 57, e2021WR030974, https://doi.org/10.1029/2021WR030974, 2021. a
Lauzon, R., Piliouras, A., and Rowland, J. C.: Ice and Permafrost Effects on Delta Morphology and Channel Dynamics, Geophys. Res. Lett., 46, 6574–6582, https://doi.org/10.1029/2019GL082792, 2019. a, b, c
Le, T. V. H., Nguyen, H. N., Wolanski, E., Tran, T. C., and Haruyama, S.: The combined impact on the flooding in Vietnam's Mekong River delta of local man-made structures, sea level rise, and dams upstream in the river catchment, Estuar. Coast. Shelf S., 71, 110–116, https://doi.org/10.1016/j.ecss.2006.08.021, 2007. a
Lexartza-Artza, I. and Wainwright, J.: Hydrological connectivity: Linking concepts with practical implications, Catena, 79, 146–152, https://doi.org/10.1016/j.catena.2009.07.001, 2009. a
Liang, M., Kim, W., and Passalacqua, P.: How much subsidence is enough to change the morphology of river deltas?, Geophys. Res. Lett., 43, 10266–10276, https://doi.org/10.1002/2016GL070519, 2016a. a, b
Maneewongvatana, S. and Mount, D. M.: Analysis of approximate nearest neighbor searching with clustered point sets, arXiv [preprint], https://doi.org/10.48550/arXiv.cs/9901013, 1999. a
Masud, M. M. A., Moni, N. N., Azadi, H., and Van Passel, S.: Sustainability impacts of tidal river management: Towards a conceptual framework, Ecol. Indic., 85, 451–467, https://doi.org/10.1016/j.ecolind.2017.10.022, 2018. a
Monge-Ganuzas, M., Cearreta, A., and Evans, G.: Morphodynamic consequences of dredging and dumping activities along the lower Oka estuary (Urdaibai Biosphere Reserve, southeastern Bay of Biscay, Spain), Ocean Coast. Manage., 77, 40–49, https://doi.org/10.1016/j.ocecoaman.2012.02.006, 2013. a
Moodie, A., Hariharan, J., Barefoot, E., and Passalacqua, P.: pyDeltaRCM: a flexible numerical delta model, Journal of Open Source Software, 6, 3398, https://doi.org/10.21105/joss.03398, 2021. a, b
Moodie, A. J. and Passalacqua, P.: When Does Faulting-Induced Subsidence Drive Distributary Network Reorganization?, Geophys. Res. Lett., 48, e2021GL095053, https://doi.org/10.1029/2021GL095053, 2021. a, b
Moodie, A. J., Hariharan, J., Barefoot, E., and Passalacqua, P.: pyDeltaRCM
v2.1.4, GitHub [code], https://github.com/DeltaRCM/pyDeltaRCM/releases/tag/v2.1.4 (last access: August 2022), 2022. a
Mossa, J. and Chen, Y. H.: Geomorphic insights from eroding dredge spoil mounds impacting channel morphology, Geomorphology, 376, 107571, https://doi.org/10.1016/j.geomorph.2020.107571, 2021. a
Nardin, W., Edmonds, D. A., and Fagherazzi, S.: Influence of vegetation on spatial patterns of sediment deposition in deltaic islands during flood, Adv. Water Resour., 93, 236–248, https://doi.org/10.1016/j.advwatres.2016.01.001, 2016. a
Olliver, E. A. and Edmonds, D. A.: Defining the ecogeomorphic succession of land building for freshwater, intertidal wetlands in Wax Lake Delta, Louisiana, Estuar. Coast. Shelf S., 196, 45–57, 2017. a
Olliver, E. A. and Edmonds, D. A.: Hydrological Connectivity Controls Magnitude and Distribution of Sediment Deposition Within the Deltaic Islands of Wax Lake Delta, LA, USA, J. Geophys. Res.-Earth, 126, e2021JF006136, https://doi.org/10.1029/2021JF006136, 2021. a
Olliver, E. A., Edmonds, D. A., and Shaw, J. B.: Influence of Floods, Tides, and Vegetation on Sediment Retention in Wax Lake Delta, Louisiana, USA, J. Geophys. Res.-Earth, 125, e2019JF005316, https://doi.org/10.1029/2019JF005316, 2020. a
Olson, K. R. and Wright Morton, L.: Polders, dikes, canals, rice, and aquaculture in the Mekong Delta, Journal of Soil and Water Conservation, 73, 83A–89A, https://doi.org/10.2489/jswc.73.4.83A, 2018. a
Passalacqua, P.: The Delta Connectome: A network-based framework for studying connectivity in river deltas, Geomorphology, 277, 50–62, https://doi.org/10.1016/j.geomorph.2016.04.001, 2017. a
Passalacqua, P., Giosan, L., Goodbred, S., and Overeem, I.: Stable ≠ Sustainable: Delta dynamics versus the human need for stability, Earths Future, e2021EF002121, https://doi.org/10.1029/2021EF002121, 2021. a
Pethick, J. and Orford, J. D.: Rapid rise in effective sea-level in southwest Bangladesh: Its causes and contemporary rates, Global Planet. Change, 111, 237–245, https://doi.org/10.1016/j.gloplacha.2013.09.019, 2013. a
Piliouras, A., Kim, W., and Carlson, B.: Balancing Aggradation and Progradation on a Vegetated Delta: The Importance of Fluctuating Discharge in Depositional Systems, J. Geophys. Res.-Earth, 122, 1882–1900, https://doi.org/10.1002/2017JF004378, 2017. a
Piliouras, A., Lauzon, R., and Rowland, J. C.: Unraveling the Combined Effects of Ice and Permafrost on Arctic Delta Morphodynamics, J. Geophys. Res.-Earth, 126, e2020JF005706, https://doi.org/10.1029/2020JF005706, 2021. a, b
Pringle, C.: The need for a more predictive understanding of hydrologic connectivity, Aquat. Conserv., 13, 467–471, https://doi.org/10.1002/aqc.603, 2003. a
Proehl, J. A., Bilgili, A., Lynch, D. R., Smith, K., and Robinson Swift, M.: The use of Lagrangian particle methods to investigate ocean-estuary exchange in well-mixed estuaries, Dev. Water Sci., 55, 1825–1837, https://doi.org/10.1016/S0167-5648(04)80188-6, 2004. a
Renaud, F. G., Syvitski, J. P., Sebesvari, Z., Werners, S. E., Kremer, H., Kuenzer, C., Ramesh, R., Jeuken, A., and Friedrich, J.: Tipping from the Holocene to the Anthropocene: How threatened are major world deltas?, Curr. Opin. Env. Sust., 5, 644–654, https://doi.org/10.1016/j.cosust.2013.11.007, 2013. a, b
Roberts, S.: ANUGA, GitHub [code], https://github.com/GeoscienceAustralia/anuga_core/releases/tag/3.1.3 (last access: August 2022), 2022. a
Roberts, S. G., Stals, L., and Nielsen, O. M.: Parallelisation of a finite volume method for hydrodynamic inundation modelling, ANZIAM J., 49, 558, https://doi.org/10.21914/anziamj.v48i0.153, 2007. a
Samuelson, B. M.: The Effect of Flood Embankments on the River-Levels in the Irrawaddy Delta (ABRIDGES), in: Minutes of the Proceedings of the Institution of Civil Engineers, vol. 203, Thomas Telford-ICE Virtual Library, 362–370, https://doi.org/10.1680/imotp.1917.15886, 1917. a
Sassi, M. G., Hoitink, A. J., 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. a
Sassi, M. G., Hoitink, A. J., De Brye, B., and Deleersnijder, E.: Downstream hydraulic geometry of a tidally influenced river delta, J. Geophys. Res.-Earth, 117, 4022, https://doi.org/10.1029/2012JF002448, 2012. a
Sendrowski, A. and Passalacqua, P.: Process connectivity in a naturally prograding river delta, Water Resour. Res., 53, 1841–1863, https://doi.org/10.1002/2016WR019768, 2017. a
Serra, J. P.: Image analysis and mathematical morphology, Academic Press, London, https://doi.org/10.1002/cyto.990040213, 1982. a
Shaw, J. B., Wolinsky, M. A., Paola, C., and Voller, V. R.: An image-based method for shoreline mapping on complex coasts, Geophys. Res. Lett., 35, https://doi.org/10.1029/2008GL033963, 2008. a, b
Shaw, J. B., Mohrig, D., and Whitman, S. K.: The morphology and evolution of channels on the Wax Lake Delta, Louisiana, USA, J. Geophys. Res.-Earth, 118, 1562–1584, 2013. a
Shaw, J. B., Mohrig, D., and Wagner, R. W.: Flow patterns and morphology of a prograding river delta, J. Geophys. Res.-Earth, 121, 372–391, https://doi.org/10.1002/2015JF003570, 2016. a
Simeoni, U. and Corbau, C.: A review of the Delta Po evolution (Italy) related to climatic changes and human impacts, Geomorphology, 107, 64–71, https://doi.org/10.1016/j.geomorph.2008.11.004, 2009. a
Straub, K. M., Li, Q., and Benson, W. M.: Influence of sediment cohesion on deltaic shoreline dynamics and bulk sediment retention: A laboratory study, Geophys. Res. Lett., 42, 9808–9815, https://doi.org/10.1002/2015GL066131, 2015. a, b
Temmerman, S. and Kirwan, M. L.: Building land with a rising sea, Science, 349, 588–589, 2015. a
Tetzlaff, D., Soulsby, C., Bacon, P. J., Youngson, A. F., Gibbins, C., and Malcolm, I. A.: Connectivity between landscapes and riverscapes – A unifying theme in integrating hydrology and ecology in catchment science?, Hydrol. Process., 21, 1385–1389, https://doi.org/10.1002/hyp.6701, 2007. a
Tull, N., Passalacqua, P., Hassenruck-Gudipati, H. J., Rahman, S., Wright, K., Hariharan, J., and Mohrig, D.: Bidirectional River-Floodplain Connectivity During Combined Pluvial-Fluvial Events, Water Resour. Res., 58, e2021WR030492, https://doi.org/10.1029/2021wr030492, 2022. a, b
Vale, L. M. and Dias, J. M.: Coupling of a Lagrangian particle tracking module to a numerical hydrodynamic model: Simulation of pollution events inside an estuarine port area, J. Coastal Res., 64, 1609–1613, 2011. a
Valseth, E., Loveland, M. D., Dawson, C., and Buskey, E. J.: A study of the potential impact of dredging the corpus christi ship channel on passive particle transport, Journal of Marine Science and Engineering, 9, 935, https://doi.org/10.3390/jmse9090935, 2021. a, b
van der Walt, S., Schönberger, J. L., Nunez-Iglesias, J., Boulogne, F.,
Warner, J. D., Yager, N., Gouillart, E., Yu, T., and the scikit-image contributors. scikit-image: Image processing in Python, Peer J., 2, e453 , https://doi.org/10.7717/peerj.453, 2014. a
van Dijk, W. M., Cox, J. R., Leuven, J. R., Cleveringa, J., Taal, M., Hiatt, M. R., Sonke, W., Verbeek, K., Speckmann, B., and Kleinhans, M. G.: The vulnerability of tidal flats and multi-channel estuaries to dredging and disposal, Anthropocene Coasts, 4, 36–60, https://doi.org/10.1139/anc-2020-0006, 2021. a, b, c
Viero, D. P. and Defina, A.: Water age, exposure time, and local flushing time in semi-enclosed, tidal basins with negligible freshwater inflow, J. Marine Syst., 156, 16–29, https://doi.org/10.1016/j.jmarsys.2015.11.006, 2016. a
Virtanen, P., Gommers, R., Oliphant, T. E., Haberland, M., Reddy, T., Cournapeau, D., Burovski, E., Peterson, P., Weckesser, W., Bright, J., van der Walt, S. J., Brett, M., Wilson, J., Millman, K. J., Mayorov, N., Nelson, A. R. J., Jones, E., Kern, R., Larson, E., Carey, C. J., Polat, I., Feng, Y., Moore, E. W., VanderPlas, J., Laxalde, D., Perktold, J., Cimrman, R., Henriksen, I., Quintero, E. A., Harris, C. R., Archibald, A. M., Ribeiro, A. H., Pedregosa, F., van Mulbregt, P., and SciPy 1.0 Contributors: SciPy 1.0: Fundamental Algorithms for Scientific Computing in Python, Nat. Methods, 17, 261–272, https://doi.org/10.1038/s41592-019-0686-2, 2020. a
Wang, X., Zhang, W., Yin, J., Wang, J., Ge, J., Wu, J., Luo, W., and Lam, N. S.: Assessment of coastal erosion vulnerability and socio-economic impact along the Yangtze River Delta, Ocean Coast. Manage., 215, 105953, https://doi.org/10.1016/j.ocecoaman.2021.105953, 2021. a
Wesselink, A., Warner, J. F., Syed, M. A., Chan, F., Tran, D. D., Huq, H.,
Huthoff, F., Le Thuy, N., Pinter, N., van Staveren, M. F., Wester, P., and
Zegwaard, A.: Trends in flood risk management in deltas around the world: Are we going “soft”?, International Journal of Water Governance, 3, 25–46, 2015. a
Wilson, C., Goodbred, S., Small, C., Gilligan, J., Sams, S., Mallick, B., and Hale, R.: Widespread infilling of tidal channels and navigable waterways in the human-modified tidal deltaplain of southwest Bangladesh, Elementa, 5, 78, https://doi.org/10.1525/elementa.263, 2017.
a, b, c, d
Wright, K., Hiatt, M., and Passalacqua, P.: Hydrological Connectivity in Vegetated River Deltas: The Importance of Patchiness Below a Threshold, Geophys. Res. Lett., 45, 10416–10427, https://doi.org/10.1029/2018GL079183, 2018. a
Wright, K., Hariharan, J., Passalacqua, P., Salter, G., and Lamb, M. P.: From Grains to Plastics: Modeling Nourishment Patterns and Hydraulic Sorting of Fluvially Transported Materials in Deltas, J. Geophys. Res.-Earth, 127, e2022JF006769, https://doi.org/10.1029/2022JF006769, 2022a. a, b, c, d, e, f, g
Wright, K., Passalacqua, P., Simard, M., and Jones, C. E.: Integrating Connectivity Into Hydrodynamic Models: An Automated Open-Source Method to Refine an Unstructured Mesh Using Remote Sensing, J. Adv. Model. Earth Sy., 14, e2022MS003025, https://doi.org/10.1029/2022MS003025, 2022b. a, b, c, d, e, f
Yuan, R. and Zhu, J.: The Effects of Dredging on Tidal Range and Saltwater Intrusion in the Pearl River Estuary, J. Coastal Res., 31, 1357–1362, https://doi.org/10.2112/JCOASTRES-D-14-00224.1, 2015. a, b, c, d
Zhu, J., Weisberg, R. H., Zheng, L., and Han, S.: Influences of Channel Deepening and Widening on the Tidal and Nontidal Circulations of Tampa Bay, Estuar. Coast., 38, 132–150, https://doi.org/10.1007/s12237-014-9815-4, 2015. a
Zoccarato, C., Minderhoud, P. S., and Teatini, P.: The role of sedimentation and natural compaction in a prograding delta: insights from the mega Mekong delta, Vietnam, Sci. Rep.-UK, 8, 1–12, https://doi.org/10.1038/s41598-018-29734-7, 2018. a
Short summary
We simulate the transport of material through numerically simulated river deltas under natural and human-modified (embankment construction and channel dredging) scenarios to understand their impacts on material transport. Human modifications reduce the total area visited by passive particles and alter the amount of time spent within the delta relative to natural conditions. This work can help us understand how future construction may impact land building or ecosystem restoration projects.
We simulate the transport of material through numerically simulated river deltas under natural...
