Articles | Volume 6, issue 4
https://doi.org/10.5194/esurf-6-1155-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-6-1155-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 Nov 2018
Research article |
| 30 Nov 2018
| 30 Nov 2018
Measuring subaqueous progradation of the Wax Lake Delta with a model of flow direction divergence
John B. Shaw
CORRESPONDING AUTHOR
Department of Geosciences, University of Arkansas, Fayetteville,
72701, USA
Justin D. Estep
Department of Geosciences, University of Arkansas, Fayetteville,
72701, USA
Department of Geology and Geophysics, Texas A&M University, College
Station, 77843, USA
Amanda R. Whaling
Department of Geosciences, University of Arkansas, Fayetteville,
72701, USA
Kelly M. Sanks
Department of Geosciences, University of Arkansas, Fayetteville,
72701, USA
Douglas A. Edmonds
Department of Earth and Atmospheric Sciences, Indiana University,
Bloomington, 47405, USA
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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.
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.
Jaap H. Nienhuis, Jana R. Cox, Joey O'Dell, Douglas A. Edmonds, and Paolo Scussolini
Nat. Hazards Earth Syst. Sci., 22, 4087–4101, https://doi.org/10.5194/nhess-22-4087-2022, https://doi.org/10.5194/nhess-22-4087-2022, 2022
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Humans build levees to protect themselves against floods. We need to know where they are to correctly predict flooding, for example from sea level rise. Here we have looked through documents to find levees, and checked that they exist using satellite imagery. We developed a global levee map, available at www.opendelve.eu, and we found that 24 % of people in deltas are protected by levees.
Rebecca L. Caldwell, Douglas A. Edmonds, Sarah Baumgardner, Chris Paola, Samapriya Roy, and Jaap H. Nienhuis
Earth Surf. Dynam., 7, 773–787, https://doi.org/10.5194/esurf-7-773-2019, https://doi.org/10.5194/esurf-7-773-2019, 2019
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River deltas are valuable resources that support biodiversity and human habitation. Despite this we do not have a global census of deltas nor do we know the conditions that promote their formation. We surveyed 5399 river mouths greater than 50 m wide and found that 2174 (40 %) create a delta. The conditions that lead to delta formation are high sediment input and low wave and tide conditions. These results can be used to understand how deltas will adapt to environmental changes.
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
Terrace formation linked to outburst floods at the Diexi palaeo-landslide dam, upper Minjiang River, eastern Tibetan Plateau
Pliocene shorelines and the epeirogenic motion of continental margins: a target dataset for dynamic topography models
Decadal-scale decay of landslide-derived fluvial suspended sediment after Typhoon Morakot
Role of the forcing sources in morphodynamic modelling of an embayed beach
A machine learning approach to the geomorphometric detection of ribbed moraines in Norway
Stream hydrology controls on ice cliff evolution and survival on debris-covered glaciers
Time-varying drainage basin development and erosion on volcanic edifices
Geomorphic risk maps for river migration using probabilistic modeling – a framework
Evolution of submarine canyons and hanging-wall fans: insights from geomorphic experiments and morphodynamic models
Riverine sediment response to deforestation in the Amazon basin
Physical modeling of ice-sheet-induced salt movements using the example of northern Germany
Downstream rounding rate of pebbles in the Himalaya
A physics-based model for fluvial valley width
Implications for the resilience of modern coastal systems derived from mesoscale barrier dynamics at Fire Island, New York
Quantifying the migration rate of drainage divides from high-resolution topographic data
Long-term monitoring (1953–2019) of geomorphologically active sections of Little Ice Age lateral moraines in the context of changing meteorological conditions
Coevolving edge rounding and shape of glacial erratics: the case of Shap granite, UK
Geomorphic indices for unveiling fault segmentation and tectono-geomorphic evolution with insights into the impact of inherited topography, Ulsan Fault Zone, Korea
How water, temperature and seismicity control the preparation of massive rock slope failure (Hochvogel, DE/AT)
Dimensionless argument: a narrow grain size range near 2 mm plays a special role in river sediment transport and morphodynamics
Path length and sediment transport estimation from DEMs of difference: a signal processing approach
The impact of bedrock meander cutoffs on 50 ka-year-scale incision rates, San Juan River, Utah
Influence of cohesive clay on wave–current ripple dynamics captured in a 3D phase diagram
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 1: Erosion dynamics
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 2: Suspended sediment dynamics
Geomorphological and hydrological controls on sediment export in earthquake-affected catchments in the Nepal Himalaya
Optimization of passive acoustic bedload monitoring in rivers by signal inversion
River suspended-sand flux computation with uncertainty estimation, using water samples and high-resolution ADCP measurements
Stochastic properties of coastal flooding events – Part 2: Probabilistic analysis
Field monitoring of pore water pressure in fully and partly saturated debris flows at Ohya landslide scar, Japan
Analysis of autogenic bifurcation processes resulting in river avulsion
Bedload transport fluctuations, flow conditions, and disequilibrium ratio at the Swiss Erlenbach stream: results from 27 years of high-resolution temporal measurements
Stochastic properties of coastal flooding events – Part 1: convolutional-neural-network-based semantic segmentation for water detection
Coexistence of two dune scales in a lowland river
Alpine hillslope failure in the western US: insights from the Chaos Canyon landslide, Rocky Mountain National Park, USA
Barchan swarm dynamics from a Two-Flank Agent-Based Model
Using repeat UAV-based laser scanning and multispectral imagery to explore eco-geomorphic feedbacks along a river corridor
Numerical modelling of the evolution of a river reach with a complex morphology to help define future sustainable restoration decisions
Method to evaluate large-wood behavior in terms of the convection equation associated with sediment erosion and deposition
Effects of seasonal variations in vegetation and precipitation on catchment erosion rates along a climate and ecological gradient: insights from numerical modeling
On the use of convolutional deep learning to predict shoreline change
On the use of packing models for the prediction of fluvial sediment porosity
Automated riverbed composition analysis using deep learning on underwater images
Marsh-induced backwater: the influence of non-fluvial sedimentation on a delta's channel morphology and kinematics
Spatial and temporal variations in rockwall erosion rates derived from cosmogenic 10Be in medial moraines at five valley glaciers around Pigne d'Arolla, Switzerland
Building a bimodal landscape: bedrock lithology and bed thickness controls on the morphology of Last Chance Canyon, New Mexico, USA
Geotechnical controls on erodibility in fluvial impact erosion
Linear-stability analysis of plane beds under flows with suspended loads
Estimating surface water availability in high mountain rock slopes using a numerical energy balance model
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Jingjuan Li, John D. Jansen, Xuanmei Fan, Zhiyong Ding, Shugang Kang, and Marco Lovati
Earth Surf. Dynam., 12, 953–971, https://doi.org/10.5194/esurf-12-953-2024, https://doi.org/10.5194/esurf-12-953-2024, 2024
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In this study, we investigated the geomorphology, sedimentology, and chronology of Tuanjie (seven terraces) and Taiping (three terraces) terraces in Diexi, eastern Tibetan Plateau. Results highlight that two damming and three outburst events occurred in the area during the late Pleistocene, and the outburst floods have been a major factor in the formation of tectonically active mountainous river terraces. Tectonic activity and climatic changes play a minor role.
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
Short summary
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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
Allen, Y. C., Couvillion, B. R., and Barras, J. A.: Using Multitemporal
Remote Sensing Imagery and Inundation Measures to Improve Land Change
Estimates in Coastal Wetlands, Estuar. Coast., 35, 190–200,
https://doi.org/10.1007/s12237-011-9437-z, 2012.
Allison, M. A., Yuill, B. T., Meselhe, E. A., Marsh, J. K., Kolker, A. S.,
and Ameen, A. D.: Observational and numerical particle tracking to examine
sediment dynamics in a Mississippi River delta diversion, Estuar. Coast.
Shelf Sci., 194, 97–108, https://doi.org/10.1016/j.ecss.2017.06.004, 2017.
Alpers, W. and Espedal, H. A.: Oils and surfactants, in Synthetic aperture
radar marine user's manual, edited by: Jackson, C. R. and Appel J. R.,
263–275, NOAA/NESDIS Office of Research and Applications,
available at:
http://www.sarusersmanual.com/ManualPDF/NOAASARManual_CH11_pg263-276.pdf (last access: 21 January 2015), 2004.
Alpers, W., Campbell, G., Wensink, H., and Zhang, Q.: Underwater Topography,
in Synthetic aperture radar marine user's manual, edited by: Jackson, C. R.
and Appel, J. R., 245–262, NOAA/NESDIS Office of Research and
Applications, available at:
http://www.sarusersmanual.com/ManualPDF/NOAASARManual_CH10_pg245-262.pdf (last access: 21 January 2015), 2004.
Andrus, T. and Bentley, S.: Sediment Flux and Fate in the Mississippi River
Diversion at West Bay: Observation Study, in: Coastal Sediments '07,
722–735, American Society of Civil Engineers, available at:
https://ascelibrary.org/doi/abs/10.1061/40926(239)55 (last access: 26
August 2015), 2007.
Barras, J. A., Bernier, J. C., and Morton, R. A.: Land Area Change in
Coastal Louisiana, a Multidecadal Perspective (from 1956 to 2006), US
Department of the Interior, US Geological Survey, available at:
https://pubs.usgs.gov/sim/3019/ (last access: 26 June 2012), 2008.
Bevington, A. E. and Twilley, R. R.: Island Edge Morphodynamics along a
Chronosequence in a Prograding Deltaic Floodplain Wetland, J. Coast. Res.,
806–817, https://doi.org/10.2112/JCOASTRES-D-17-00074.1, 2018.
Cahoon, D. R., White, D. A., and Lynch, J. C.: Sediment infilling and wetland
formation dynamics in an active crevasse splay of the Mississippi River
delta, Geomorphology, 131, 57–68, https://doi.org/10.1016/j.geomorph.2010.12.002,
2011.
Caldwell, R. L. and Edmonds, D. A.: The effects of sediment properties on
deltaic processes and morphologies: A numerical modeling study, J. Geophys.
Res.-Earth, 119, 961–982, https://doi.org/10.1002/2013JF002965, 2014.
Carle, M. V., Sasser, C. E., and Roberts, H. H.: Accretion and Vegetation
Community Change in the Wax Lake Delta Following the Historic 2011
Mississippi River Flood, J. Coast. Res., 569–587,
https://doi.org/10.2112/JCOASTRES-D-13-00109.1, 2015.
Coffey, T. S. and Shaw, J. B.: Congruent Bifurcation Angles in River Delta
and Tributary Channel Networks, Geophys. Res. Lett., 2017GL074873,
https://doi.org/10.1002/2017GL074873, 2017.
Couvillion, B. R., Barras, J. A., Steyer, G. D., Sleavin, W., Fischer, M.,
Beck, H., Trahan, N., Griffin, B., and Heckman, D.: Land Area Change in
Coastal Louisiana from 1932 to 2010, Scientific Investigations Map,
Washington, D. C., 2011.
Draut, A. E., Kineke, G. C., Velasco, D. W., Allison, M. A., and Prime, R.
J.: Influence of the Atchafalaya River on recent evolution of the
chenier-plain inner continental shelf, northern Gulf of Mexico, Cont. Shelf
Res., 25, 91–112, https://doi.org/10.1016/j.csr.2004.09.002, 2005.
Edmonds, D. A. and Slingerland, R.: Mechanics of river mouth bar formation:
Implications for the morphodynamics of delta distributary networks, J.
Geophys. Res., 112, F02034, https://doi.org/10.1029/2006JF000574, 2007.
Edmonds, D. A., Paola, C., Hoyal, D. C. J. D., and Sheets, B. A.:
Quantitative metrics that describe river deltas and their channel networks,
J. Geophys. Res., 116, F04022, https://doi.org/10.1029/2010JF001955, 2011a.
Edmonds, D. A., Shaw, J. B., and Mohrig, D.: Topset-dominated deltas: A new
model for river delta stratigraphy, Geology, 39, 1175–1178,
https://doi.org/10.1130/G32358.1, 2011b.
Enge, H. D., Howell, J. A., and Buckley, S. J.: The Geometry and Internal
Architecture of Stream Mouth Bars in the Panther Tongue and the Ferron
Sandstone Members, Utah, U.S.A., J. Sediment. Res., 80, 1018–1031,
https://doi.org/10.2110/jsr.2010.088, 2010.
Erban, L. E., Gorelick, S. M., and Zebker, H. A.: Groundwater extraction,
land subsidence, and sea-level rise in the Mekong Delta, Vietnam, Environ.
Res. Lett., 9, 084010, https://doi.org/10.1088/1748-9326/9/8/084010, 2014.
Espedal, H. A., Johannessen, O. M., and Knulst, J.: Satellite detection of
natural films on the ocean surface, Geophys. Res. Lett., 23, 3151–3154,
https://doi.org/10.1029/96GL03009, 1996.
Esposito, C. R., Georgiou, I. Y., and Kolker, A. S.: Hydrodynamic and
geomorphic controls on mouth bar evolution, Geophys. Res. Lett., 40,
1540–1545, https://doi.org/10.1002/grl.50333, 2013.
Fagherazzi, S., Edmonds, D. A., Nardin, W., Leonardi, N., Canestrelli, A.,
Falcini, F., Jerolmack, D., Mariotti, G., Rowland, J. C., and Slingerland, R.
L.: Dynamics of River Mouth Deposits, Rev. Geophys., 53, 2014RG000451,
https://doi.org/10.1002/2014RG000451, 2015.
Galloway, W. E.: Process framework for describing the morphologic and
stratigraphic evolution of deltaic depositional systems, edited by:
Broussard, M. L., Deltas Models Explor., 87–98, 1975.
Gao, J.: Bathymetric mapping by means of remote sensing: methods, accuracy
and limitations, Prog. Phys. Geogr., 33, 103–116,
https://doi.org/10.1177/0309133309105657, 2009.
Garabetian, F., Romano, J.-C., Paul, R., and Sigoillot, J.-C.: Organic matter
composition and pollutant enrichment of sea surface microlayer inside and
outside slicks, Mar. Environ. Res., 35, 323–339,
https://doi.org/10.1016/0141-1136(93)90100-E, 1993.
Geleynse, N., Storms, J., Stive, M., Jagers, H., and Walstra, D.: Modeling of
a mixed-load fluvio-deltaic system, Geophys. Res. Lett., 37, L05402, https://doi.org/10.1029/2009GL042000, 2010.
Geleynse, N., Hiatt, M., Sangireddy, H., and Passalacqua, P.: Identifying
environmental controls on the shoreline of a natural river delta, J.
Geophys. Res.-Earth, 120, 2014JF003408, https://doi.org/10.1002/2014JF003408, 2015.
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.
Hiatt, M. and Passalacqua, P.: What Controls the Transition from Confined to
Unconfined Flow? Analysis of Hydraulics in a Coastal River Delta, J.
Hydraul. Eng., 143, 03117003, https://doi.org/10.1061/(ASCE)HY.1943-7900.0001309,
2017.
Holm, G. O. and Sasser, C. E.: Differential salinity response between two
Mississippi River subdeltas: implications for changes in plant composition,
Estuar. Coast., 24, 78–89, 2001.
Hühnerfuss, H., Gericke, A., Alpers, W., Theis, R., Wismann, V., and
Lange, P. A.: Classification of sea slicks by multifrequency radar
techniques: New chemical insights and their geophysical implications, J.
Geophys. Res.-Oceans, 99, 9835–9845, https://doi.org/10.1029/93JC03308, 1994.
Jiménez-Robles, A. M., Ortega-Sánchez, M., and Losada, M. A.: Effects
of basin bottom slope on jet hydrodynamics and river mouth bar formation, J.
Geophys. Res.-Earth, 121, 2016JF003871, https://doi.org/10.1002/2016JF003871,
2016.
Johnson, W., Sasser, C., and Gosselink, J.: Succession of vegetation in an
evolving river delta, Atchafalaya Bay, Louisiana, J. Ecol., 70, 973–986, 1985.
Kim, W., Mohrig, D., Twilley, 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.
Kolker, A. S., Miner, M. D., and Weathers, H. D.: Depositional dynamics in a
river diversion receiving basin: The case of the West Bay Mississippi River
Diversion, Estuar. Coast. Shelf Sci., 106, 1–12,
https://doi.org/10.1016/j.ecss.2012.04.005, 2012.
Kundu, P. K., Cohen, I. M., and Dowling, D.: Fluid Mechanics, Fifth Edition,
5 edition., Academic Press, Waltham, MA., 2011.
Lamb, M. P., McElroy, B., Kopriva, B., Shaw, J. B., and Mohrig, D.: Linking
river-flood dynamics to hyperpycnal-plume deposits: Experiments, theory, and
geological implications, Geol. Soc. Am. Bull., 122, 1389–1400,
https://doi.org/10.1130/B30125.1, 2010.
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.
Li, C., Roberts, H., Stone, G. W., Weeks, E., and Luo, Y.: Wind surge and
saltwater intrusion in Atchafalaya Bay during onshore winds prior to cold
front passage, Hydrobiologia, 658, 27–39, https://doi.org/10.1007/s10750-010-0467-5,
2011.
Li, X. and Damen, M. C. J.: Coastline change detection with satellite remote
sensing for environmental management of the Pearl River Estuary, China, J.
Mar. Syst., 82, S54–S61, https://doi.org/10.1016/j.jmarsys.2010.02.005, 2010.
Liang, M., Van Dyk, C., and Passalacqua, P.: Quantifying the Patterns and
Dynamics of River Deltas Under Conditions of Steady Forcing and Relative
Sea-Level Rise, J. Geophys. Res.-Earth, 121, 2015JF003653,
https://doi.org/10.1002/2015JF003653, 2016.
Muggeo, V. M. R.: Estimating regression models with unknown break-points,
Stat. Med., 22, 3055–3071, https://doi.org/10.1002/sim.1545, 2003.
Nardin, W. and Fagherazzi, S.: The effect of wind waves on the development
of river mouth bars, Geophys. Res. Lett., 39, L12607,
https://doi.org/10.1029/2012GL051788, 2012.
Neill, C. F. and Allison, M. A.: Subaqueous deltaic formation on the
Atchafalaya Shelf, Louisiana, Mar. Geol., 214, 411–430,
https://doi.org/10.1016/j.margeo.2004.11.002, 2005.
NOAA: Saint Clair River, available at:
http://www.charts.noaa.gov/PDFs/14852.pdf, last access: 5 July 2017.
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 Sci., 196, 45–57, https://doi.org/10.1016/j.ecss.2017.06.009, 2017.
Özsoy, E. and Ünlüata, Ü.: Ebb-tidal flow characteristics
near inlets, Estuar. Coast. Shelf Sci., 14, 251–263,
https://doi.org/10.1016/S0302-3524(82)80015-7, 1982.
Paola, C., Twilley, R. R., Edmonds, D. A., Kim, W., Mohrig, D., Parker, G.,
Viparelli, E., and Voller, V. R.: Natural Processes in Delta Restoration:
Application to the Mississippi Delta, Annu. Rev. Mar. Sci., 3, 67–91,
https://doi.org/10.1146/annurev-marine-120709-142856, 2011.
Peyronnin, N. S., Caffey, R. H., Cowan, J. H., Justic, D., Kolker, A. S.,
Laska, S. B., McCorquodale, A., Melancon, E., Nyman, J. A., Twilley, R. R.,
Visser, J. M., White, J. R., and Wilkins, J. G.: Optimizing Sediment
Diversion Operations: Working Group Recommendations for Integrating Complex
Ecological and Social Landscape Interactions, Water, 9, 368,
https://doi.org/10.3390/w9060368, 2017.
Rahman, A. F., Dragoni, D., and El-Masri, B.: Response of the Sundarbans
coastline to sea level rise and decreased sediment flow: A remote sensing
assessment, Remote Sens. Environ., 115, 3121–3128,
https://doi.org/10.1016/j.rse.2011.06.019, 2011.
Rangoonwala, A., Jones, C. E., and Ramsey, E.: Wetland shoreline recession in
the Mississippi River Delta from petroleum oiling and cyclonic storms,
Geophys. Res. Lett., 43, 2016GL070624, https://doi.org/10.1002/2016GL070624, 2016.
Romeiser, R. and Alpers, W.: An improved composite surface model for the
radar backscattering cross section of the ocean surface: 2. Model response
to surface roughness variations and the radar imaging of underwater bottom
topography, J. Geophys. Res.-Oceans, 102, 25251–25267,
https://doi.org/10.1029/97JC00191, 1997.
Shaw, J. B.: The Kinematics of Distributary Channels on the Wax Lake Delta,
Coastal Louisiana, USA, PhD Dissertation, The University of Texas at
Austin, Austin, TX, available at:
https://repositories.lib.utexas.edu/handle/2152/25220 (last access: 30 June 2018), 2013.
Shaw, J. B. and Haynes, A.: Streakline analysis of the Wax Lake Delta, 1974–2016,
https://doi.org/10.6084/m9.figshare.7075181.v2, 2018.
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.
Shaw, J. B., Ayoub, F., Jones, C. E., Lamb, M. P., Holt, B., Wayne Wagner,
R., Coffey, T., Austin Chadwick, J., and Mohrig, D.: Airborne Radar Imaging
of Subaqueous Channel Evolution in Wax Lake Delta, Louisiana, USA, Geophys.
Res. Lett., 43, 2016GL068770, https://doi.org/10.1002/2016GL068770, 2016a.
Shaw, J. B., Mohrig, D., and Wagner, R. W.: Flow patterns and morphology of a
prograding river delta, J. Geophys. Res.-Earth, 121, 2015JF003570,
https://doi.org/10.1002/2015JF003570, 2016b.
Shaw, J. B., Miller, K., and McElroy, B.: Island Formation Resulting from
Radially Symmetric Flow Expansion, J. Geophys. Res.-Earth,
123, 2017JF004464, https://doi.org/10.1002/2017JF004464, 2018.
Shields, M. R., Bianchi, T. S., Mohrig, D., Hutchings, J. A., Kenney, W. F.,
Kolker, A. S., and Curtis, J. H.: Carbon storage in the Mississippi River
delta enhanced by environmental engineering, Nat. Geosci., 10, 846–851,
https://doi.org/10.1038/ngeo3044, 2017.
Shlemon, R. J.: Subaqueous delta formation – Atchafalaya Bay, Louisiana, in
Deltas, Models for Exploration, edited by: Broussard, M. L., 209–221,
Houston Geological Society, 1972.
Wagner, R. W., Lague, D., Mohrig, D., Passalacqua, P., Shaw, J. B., and
Moffett, K.: Elevation Change and Stability on a Prograding Delta, Geophys.
Res. Lett., 44, 2016GL072070, https://doi.org/10.1002/2016GL072070, 2017.
Wilson, C., Goodbred, S., Small, C., Gilligan, J., Sams, S., Mallick, B., and
Hale, R.: Widespread infilling of tidal channels and navigable waterways in
human-modified tidal deltaplain of southwest Bangladesh, Elem. Sci. Anth.,
5, 78, https://doi.org/10.1525/elementa.263, 2017.
Wright, L.: Sediment transport and deposition at river mouths: a synthesis,
Bull. Geol. Soc. Am., 88, 857–868, 1977.
Wu, X., Bi, N., Xu, J., Nittrouer, J. A., Yang, Z., Saito, Y., and Wang, H.:
Stepwise morphological evolution of the active Yellow River (Huanghe) delta
lobe (1976–2013): Dominant roles of riverine discharge and sediment grain
size, Geomorphology, 292, 115–127, https://doi.org/10.1016/j.geomorph.2017.04.042,
2017.
Short summary
Deltas are important landforms because many people live near them. Specific water flow patterns of spreading and contraction are produced where delta channel flow meets the ocean. Tracers on the water surface allow this pattern to be measured from space. We identify this pattern on a growing river delta in 40 years of images, allowing us to track its growth in a new way. This method has potential to improve monitoring of deltas worldwide.
Deltas are important landforms because many people live near them. Specific water flow patterns...
