Articles | Volume 11, issue 3
https://doi.org/10.5194/esurf-11-343-2023
© 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-11-343-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 May 2023
Research article |
| 04 May 2023
| 04 May 2023
Water level fluctuations drive bank instability in a hypertidal estuary
Andrea Gasparotto
CORRESPONDING AUTHOR
Department of Geography, University of Exeter, Exeter, EX4 4RJ, UK
School of Geography and Environmental Science, University of
Southampton, Southampton, SO17 1BJ, UK
Stephen E. Darby
School of Geography and Environmental Science, University of
Southampton, Southampton, SO17 1BJ, UK
Julian Leyland
School of Geography and Environmental Science, University of
Southampton, Southampton, SO17 1BJ, UK
Paul A. Carling
School of Geography and Environmental Science, University of
Southampton, Southampton, SO17 1BJ, UK
Related authors
No articles found.
Nazir Ahmed Bazai, Paul A. Carling, Peng Cui, Wang Hao, Zhang Guotao, Liu Dingzhu, and Javed Hassan
The Cryosphere, 18, 5921–5938, https://doi.org/10.5194/tc-18-5921-2024, https://doi.org/10.5194/tc-18-5921-2024, 2024
Short summary
Short summary
We explored the growing threat of glacier lake outburst floods (GLOFs) driven by glacier surges in the Karakoram. Using advanced remote sensing and field data, we identified key lake volumes and depths that indicate potential GLOFs. Our findings improve early warning systems by providing rapid methods to assess lake volumes in remote areas. This research seeks to protect vulnerable communities and contribute to global efforts in predicting and mitigating catastrophic flood risks.
Melissa Wood, Ivan D. Haigh, Quan Quan Le, Hung Nghia Nguyen, Hoang Ba Tran, Stephen E. Darby, Robert Marsh, Nikolaos Skliris, and Joël J.-M. Hirschi
Nat. Hazards Earth Syst. Sci., 24, 3627–3649, https://doi.org/10.5194/nhess-24-3627-2024, https://doi.org/10.5194/nhess-24-3627-2024, 2024
Short summary
Short summary
We look at how compound flooding from the combination of river flooding and storm tides (storm surge and astronomical tide) may be changing over time due to climate change, with a case study of the Mekong River delta. We found that future compound flooding has the potential to flood the region more extensively and be longer lasting than compound floods today. This is useful to know because it means managers of deltas such as the Mekong can assess options for improving existing flood defences.
Solomon H. Gebrechorkos, Julian Leyland, Simon J. Dadson, Sagy Cohen, Louise Slater, Michel Wortmann, Philip J. Ashworth, Georgina L. Bennett, Richard Boothroyd, Hannah Cloke, Pauline Delorme, Helen Griffith, Richard Hardy, Laurence Hawker, Stuart McLelland, Jeffrey Neal, Andrew Nicholas, Andrew J. Tatem, Ellie Vahidi, Yinxue Liu, Justin Sheffield, Daniel R. Parsons, and Stephen E. Darby
Hydrol. Earth Syst. Sci., 28, 3099–3118, https://doi.org/10.5194/hess-28-3099-2024, https://doi.org/10.5194/hess-28-3099-2024, 2024
Short summary
Short summary
This study evaluated six high-resolution global precipitation datasets for hydrological modelling. MSWEP and ERA5 showed better performance, but spatial variability was high. The findings highlight the importance of careful dataset selection for river discharge modelling due to the lack of a universally superior dataset. Further improvements in global precipitation data products are needed.
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
Short summary
Short summary
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.
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
Short summary
Short summary
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.
Paul A. Carling, John D. Jansen, Teng Su, Jane Lund Andersen, and Mads Faurschou Knudsen
Earth Surf. Dynam., 11, 817–833, https://doi.org/10.5194/esurf-11-817-2023, https://doi.org/10.5194/esurf-11-817-2023, 2023
Short summary
Short summary
Many steep glaciated rock walls collapsed when the Ice Age ended. How ice supports a steep rock wall until the ice decays is poorly understood. A collapsed rock wall was surveyed in the field and numerically modelled. Cosmogenic exposure dates show it collapsed and became ice-free ca. 18 ka ago. The model showed that the rock wall failed very slowly because ice was buttressing the slope. Dating other collapsed rock walls can improve understanding of how and when the last Ice Age ended.
Melissa Wood, Ivan D. Haigh, Quan Quan Le, Hung Nghia Nguyen, Hoang Ba Tran, Stephen E. Darby, Robert Marsh, Nikolaos Skliris, Joël J.-M. Hirschi, Robert J. Nicholls, and Nadia Bloemendaal
Nat. Hazards Earth Syst. Sci., 23, 2475–2504, https://doi.org/10.5194/nhess-23-2475-2023, https://doi.org/10.5194/nhess-23-2475-2023, 2023
Short summary
Short summary
We used a novel database of simulated tropical cyclone tracks to explore whether typhoon-induced storm surges present a future flood risk to low-lying coastal communities around the South China Sea. We found that future climate change is likely to change tropical cyclone behaviour to an extent that this increases the severity and frequency of storm surges to Vietnam, southern China, and Thailand. Consequently, coastal flood defences need to be reviewed for resilience against this future hazard.
Chengbin Zou, Paul Carling, Zetao Feng, Daniel Parsons, and Xuanmei Fan
The Cryosphere Discuss., https://doi.org/10.5194/tc-2022-119, https://doi.org/10.5194/tc-2022-119, 2022
Manuscript not accepted for further review
Short summary
Short summary
Climate change is causing mountain lakes behind glacier barriers to drain through ice tunnels as catastrophe floods, threatening people and infrastructure downstream. Understanding of how process works can mitigate the impacts by providing advanced warnings. A laboratory study of ice tunnel development improved understanding of how floods evolve. The principles of ice tunnel development were defined numerically and can be used to better model natural floods leading to improved prediction.
Sepehr Eslami, Piet Hoekstra, Herman W. J. Kernkamp, Nam Nguyen Trung, Dung Do Duc, Hung Nguyen Nghia, Tho Tran Quang, Arthur van Dam, Stephen E. Darby, Daniel R. Parsons, Grigorios Vasilopoulos, Lisanne Braat, and Maarten van der Vegt
Earth Surf. Dynam., 9, 953–976, https://doi.org/10.5194/esurf-9-953-2021, https://doi.org/10.5194/esurf-9-953-2021, 2021
Short summary
Short summary
Increased salt intrusion jeopardizes freshwater supply to the Mekong Delta, and the current trends are often inaccurately associated with sea level rise. Using observations and models, we show that salinity is highly sensitive to ocean surge, tides, water demand, and upstream discharge. We show that anthropogenic riverbed incision has significantly amplified salt intrusion, exemplifying the importance of preserving sediment budget and riverbed levels to protect deltas against salt intrusion.
Paula Camus, Ivan D. Haigh, Ahmed A. Nasr, Thomas Wahl, Stephen E. Darby, and Robert J. Nicholls
Nat. Hazards Earth Syst. Sci., 21, 2021–2040, https://doi.org/10.5194/nhess-21-2021-2021, https://doi.org/10.5194/nhess-21-2021-2021, 2021
Short summary
Short summary
In coastal regions, floods can arise through concurrent drivers, such as precipitation, river discharge, storm surge, and waves, which exacerbate the impact. In this study, we identify hotspots of compound flooding along the southern coast of the North Atlantic Ocean and the northern coast of the Mediterranean Sea. This regional assessment can be considered a screening tool for coastal management that provides information about which areas are more predisposed to experience compound flooding.
Alistair Hendry, Ivan D. Haigh, Robert J. Nicholls, Hugo Winter, Robert Neal, Thomas Wahl, Amélie Joly-Laugel, and Stephen E. Darby
Hydrol. Earth Syst. Sci., 23, 3117–3139, https://doi.org/10.5194/hess-23-3117-2019, https://doi.org/10.5194/hess-23-3117-2019, 2019
Short summary
Short summary
Flooding can arise from multiple sources, including waves, extreme sea levels, rivers, and severe rainfall. When two or more sources combine, the consequences can be greatly multiplied. We find the potential for the joint occurrence of extreme sea levels and river discharge to be greater on the western coast of the UK compared to the eastern coast. This is due to the weather conditions generating each flood source around the UK. These results will help increase our flood forecasting ability.
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
Post-fire evolution of ravel transport regimes in the Diablo Range, CA
Landscape response to tectonic deformation and cyclic climate change since ca. 800 ka in the southern central Andes
The Aare main overdeepening on the northern margin of the European Alps: basins, riegels, and slot canyons
A simple model for faceted topographies at normal faults based on an extended stream-power law
Testing floc settling velocity models in rivers and freshwater wetlands
River suspended-sand flux computation with uncertainty estimation using water samples and high-resolution ADCP measurements
Barchan swarm dynamics from a Two-Flank Agent-Based Model
A landslide runout model for sediment transport, landscape evolution, and hazard assessment applications
Tracking slow-moving landslides with PlanetScope data: new perspectives on the satellite's perspective
Topographic metrics for unveiling fault segmentation and tectono-geomorphic evolution with insights into the impact of inherited topography, Ulsan Fault Zone, South Korea
Acceleration of coastal-retreat rates for high-Arctic rock cliffs on Brøggerhalvøya, Svalbard, over the past decade
The impact of bedrock meander cutoffs on 50 kyr scale incision rates, San Juan River, Utah
How water, temperature, and seismicity control the preconditioning of massive rock slope failure (Hochvogel)
Large structure simulation for landscape evolution models
Terrace formation linked to outburst floods at the Diexi palaeo-landslide dam, upper Minjiang River, eastern Tibetan Plateau
Width evolution of channel belts as a random walk
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
Equilibrium distance from long-range dune interactions
Geomorphic imprint of high mountain floods: Insight from the 2022 hydrological extreme across the Upper Indus terrain in NW Himalayas
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
Geometric constraints on tributary fluvial network junction angles
A new dunetracking tool to support input parameter selection and uncertainty analyses using a Monte Carlo approach
An evaluation of flow-routing algorithms for calculating contributing area on regular grids
Downstream rounding rate of pebbles in the Himalaya
Automatic detection of instream large wood in videos using deep learning
Examination of Analytical Shear Stress Predictions for Coastal Dune Evolution
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
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
A numerical model for duricrust formation by water table fluctuations
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
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
Hayden L. Jacobson, Danica L. Roth, Gabriel Walton, Margaret Zimmer, and Kerri Johnson
Earth Surf. Dynam., 12, 1415–1446, https://doi.org/10.5194/esurf-12-1415-2024, https://doi.org/10.5194/esurf-12-1415-2024, 2024
Short summary
Short summary
Loose grains travel farther after a fire because no vegetation is left to stop them. This matters since loose grains at the base of a slope can turn into a debris flow if it rains. To find if grass growing back after a fire had different impacts on grains of different sizes on slopes of different steepness, we dropped thousands of natural grains and measured how far they went. Large grains went farther 7 months after the fire than 11 months after, and small grain movement didn’t change much.
Elizabeth N. Orr, Taylor F. Schildgen, Stefanie Tofelde, Hella Wittmann, and Ricardo N. Alonso
Earth Surf. Dynam., 12, 1391–1413, https://doi.org/10.5194/esurf-12-1391-2024, https://doi.org/10.5194/esurf-12-1391-2024, 2024
Short summary
Short summary
Fluvial terraces and alluvial fans in the Toro Basin, NW Argentina, record river evolution and global climate cycles over time. Landform dating reveals lower-frequency climate cycles (100 kyr) preserved downstream and higher-frequency cycles (21/40 kyr) upstream, supporting theoretical predications that longer rivers filter out higher-frequency climate signals. This finding improves our understanding of the spatial distribution of sedimentary paleoclimate records within landscapes.
Fritz Schlunegger, Edi Kissling, Dimitri Tibo Bandou, Guilhem Amin Douillet, David Mair, Urs Marti, Regina Reber, Patrick Schläfli, and Michael Alfred Schwenk
Earth Surf. Dynam., 12, 1371–1389, https://doi.org/10.5194/esurf-12-1371-2024, https://doi.org/10.5194/esurf-12-1371-2024, 2024
Short summary
Short summary
Overdeepenings are bedrock depressions filled with sediment. We combine the results of a gravity survey with drilling data to explore the morphology of such a depression beneath the city of Bern. We find that the target overdeepening comprises two basins >200 m deep. They are separated by a bedrock riegel that itself is cut by narrow canyons up to 150 m deep. We postulate that these structures formed underneath a glacier, where erosion by subglacial meltwater caused the formation of the canyons.
Stefan Hergarten
Earth Surf. Dynam., 12, 1315–1327, https://doi.org/10.5194/esurf-12-1315-2024, https://doi.org/10.5194/esurf-12-1315-2024, 2024
Short summary
Short summary
Faceted topographies are impressive footprints of active tectonics in geomorphology. This paper investigates the evolution of faceted topographies at normal faults and their interaction with a river network theoretically and numerically. As a main result beyond several relations for the geometry of facets, the horizontal displacement associated with normal faults is crucial for the dissection of initially polygonal facets into triangular facets bounded by almost parallel rivers.
Justin A. Nghiem, Gen K. Li, Joshua P. Harringmeyer, Gerard Salter, Cédric G. Fichot, Luca Cortese, and Michael P. Lamb
Earth Surf. Dynam., 12, 1267–1294, https://doi.org/10.5194/esurf-12-1267-2024, https://doi.org/10.5194/esurf-12-1267-2024, 2024
Short summary
Short summary
Fine sediment grains in freshwater can cohere into faster-settling particles called flocs, but floc settling velocity theory has not been fully validated. Combining three data sources in novel ways in the Wax Lake Delta, we verified a semi-empirical model relying on turbulence and geochemical factors. For a physics-based model, we showed that the representative grain diameter within flocs relies on floc structure and that heterogeneous flow paths inside flocs increase floc settling velocity.
Jessica Marggraf, Guillaume Dramais, Jérôme Le Coz, Blaise Calmel, Benoît Camenen, David J. Topping, William Santini, Gilles Pierrefeu, and François Lauters
Earth Surf. Dynam., 12, 1243–1266, https://doi.org/10.5194/esurf-12-1243-2024, https://doi.org/10.5194/esurf-12-1243-2024, 2024
Short summary
Short summary
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 measurements. This is the first method that includes a fully applicable uncertainty estimation; it can easily be applied to any other study sites.
Dominic T. Robson and Andreas C. W. Baas
Earth Surf. Dynam., 12, 1205–1226, https://doi.org/10.5194/esurf-12-1205-2024, https://doi.org/10.5194/esurf-12-1205-2024, 2024
Short summary
Short summary
Barchans are fast-moving sand dunes which form large populations (swarms) on Earth and Mars. We show that a small range of model parameters produces swarms in which dune size does not vary downwind – something that is observed in nature but not when using earlier models. We also show how the shape of dunes and the spatial patterns they form are affected by wind direction. This work furthers our understanding of the interplay between environmental drivers, dune interactions, and swarm properties.
Jeffrey Keck, Erkan Istanbulluoglu, Benjamin Campforts, Gregory Tucker, and Alexander Horner-Devine
Earth Surf. Dynam., 12, 1165–1191, https://doi.org/10.5194/esurf-12-1165-2024, https://doi.org/10.5194/esurf-12-1165-2024, 2024
Short summary
Short summary
MassWastingRunout (MWR) is a new landslide runout model designed for sediment transport, landscape evolution, and hazard assessment applications. MWR is written in Python and includes a calibration utility that automatically determines best-fit parameters for a site and empirical probability density functions of each parameter for probabilistic model implementation. MWR and Jupyter Notebook tutorials are available as part of the Landlab package at https://github.com/landlab/landlab.
Ariane Mueting and Bodo Bookhagen
Earth Surf. Dynam., 12, 1121–1143, https://doi.org/10.5194/esurf-12-1121-2024, https://doi.org/10.5194/esurf-12-1121-2024, 2024
Short summary
Short summary
This study investigates the use of optical PlanetScope data for offset tracking of the Earth's surface movement. We found that co-registration accuracy is locally degraded when outdated elevation models are used for orthorectification. To mitigate this bias, we propose to only correlate scenes acquired from common perspectives or base orthorectification on more up-to-date elevation models generated from PlanetScope data alone. This enables a more detailed analysis of landslide dynamics.
Cho-Hee Lee, Yeong Bae Seong, John Weber, Sangmin Ha, Dong-Eun Kim, and Byung Yong Yu
Earth Surf. Dynam., 12, 1091–1120, https://doi.org/10.5194/esurf-12-1091-2024, https://doi.org/10.5194/esurf-12-1091-2024, 2024
Short summary
Short summary
Topographic metrics were used to understand changes due to tectonic activity. We evaluated the relative tectonic activity along the Ulsan Fault Zone (UFZ), one of the most active fault zones in South Korea. We divided the UFZ into five segments, based on the spatial variation in activity. We modeled the landscape evolution of the study area and interpreted tectono-geomorphic history during which the northern part of the UFZ experienced asymmetric uplift, while the southern part did not.
Juditha Aga, Livia Piermattei, Luc Girod, Kristoffer Aalstad, Trond Eiken, Andreas Kääb, and Sebastian Westermann
Earth Surf. Dynam., 12, 1049–1070, https://doi.org/10.5194/esurf-12-1049-2024, https://doi.org/10.5194/esurf-12-1049-2024, 2024
Short summary
Short summary
Coastal rock cliffs on Svalbard are considered to be fairly stable; however, long-term trends in coastal-retreat rates remain unknown. This study examines changes in the coastline position along Brøggerhalvøya, Svalbard, using aerial images from 1970, 1990, 2010, and 2021. Our analysis shows that coastal-retreat rates accelerate during the period 2010–2021, which coincides with increasing storminess and retreating sea ice.
Aaron T. Steelquist, Gustav B. Seixas, Mary L. Gillam, Sourav Saha, Seulgi Moon, and George E. Hilley
Earth Surf. Dynam., 12, 1071–1089, https://doi.org/10.5194/esurf-12-1071-2024, https://doi.org/10.5194/esurf-12-1071-2024, 2024
Short summary
Short summary
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 for 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.
Johannes Leinauer, Michael Dietze, Sibylle Knapp, Riccardo Scandroglio, Maximilian Jokel, and Michael Krautblatter
Earth Surf. Dynam., 12, 1027–1048, https://doi.org/10.5194/esurf-12-1027-2024, https://doi.org/10.5194/esurf-12-1027-2024, 2024
Short summary
Short summary
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 4 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.
Julien Coatléven and Benoit Chauveau
Earth Surf. Dynam., 12, 995–1026, https://doi.org/10.5194/esurf-12-995-2024, https://doi.org/10.5194/esurf-12-995-2024, 2024
Short summary
Short summary
The aim of this paper is to explain how to incorporate classical water flow routines into landscape evolution models while keeping numerical errors under control. The key idea is to adapt filtering strategies to eliminate anomalous numerical errors and mesh dependencies, as confirmed by convergence tests with analytic solutions. The emergence of complex geomorphic structures is now driven exclusively by nonlinear heterogeneous physical processes rather than by random numerical artifacts.
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
Short summary
Short summary
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.
Jens Martin Turowski, Fergus McNab, Aaron Bufe, and Stefanie Tofelde
EGUsphere, https://doi.org/10.5194/egusphere-2024-2342, https://doi.org/10.5194/egusphere-2024-2342, 2024
Short summary
Short summary
Channel belts comprise the area that is affected by a river due to lateral migration and floods. As a landform, they affect local water resources, flood hazard, and often host unique ecological communities. Here, we develop a model describing the evolution of channel belt area over time. The model connects the behaviour of the river to the evolution of the channel belt over a timescale of centuries. A comparison to selected data from experiments and real river systems is favourable.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
Jean Vérité, Clément Narteau, Olivier Rozier, Jeanne Alkalla, Laurie Barrier, and Sylvain Courrech du Pont
EGUsphere, https://doi.org/10.5194/egusphere-2024-1634, https://doi.org/10.5194/egusphere-2024-1634, 2024
Short summary
Short summary
Using a numerical model in 2D, we study how two identical dunes interact with each other when exposed to reversing winds. Depending on the distance between the dunes, they either repel or attract each other until they reach an equilibrium distance, which is controlled by the wind strength, wind reversal frequency and dune size. This process is controlled by the modification of wind flow over dunes of various shape, influencing the sediment transport downstream.
Abhishek Kashyap, Kristen Cook, and Mukunda Dev Behera
EGUsphere, https://doi.org/10.5194/egusphere-2024-1618, https://doi.org/10.5194/egusphere-2024-1618, 2024
Short summary
Short summary
High-mountain floods exhibit a significant geomorphic hazard, often triggered by rapid snowmelt, extreme precipitation, glacial lake outbursts, and natural failures of dams. Such high-magnitude floods can have catastrophic impacts on downstream communities, ecosystems, and infrastructure. These floods demonstrate the significance of understanding the complex interaction of climatic, hydrological, and geological forces in high mountain regions.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
Jon D. Pelletier, Robert G. Hayes, Olivia Hoch, Brendan Fenerty, and Luke A. McGuire
EGUsphere, https://doi.org/10.5194/egusphere-2024-1153, https://doi.org/10.5194/egusphere-2024-1153, 2024
Short summary
Short summary
On the gently sloping landscapes next to mountain fronts, junction angles tend to be lower (more acute), while in bedrock landscapes where the initial landscape or tectonic forcing is likely more spatially variable, junction angles tend to be larger (more obtuse). We demonstrate this using an analysis of ~20 million junction angles for the U.S.A., augmented by analyses of the Loess Plateau, China, and synthetic landscapes.
Julius Reich and Axel Winterscheid
EGUsphere, https://doi.org/10.5194/egusphere-2024-579, https://doi.org/10.5194/egusphere-2024-579, 2024
Short summary
Short summary
Analysing the geometry and the dynamics of riverine bedforms (so-called dunetracking) is important for various fields of application and contributes to a sound and efficient river and sediment management. We developed a new tool, which enables a robust estimation of bedform characteristics and with which comprehensive sensitivity analyses can be carried out. Using a test dataset, we show that the selection of input parameters of dunetracking tools can have a significant impact on the results.
Alexander B. Prescott, Jon D. Pelletier, Satya Chataut, and Sriram Ananthanarayan
EGUsphere, https://doi.org/10.5194/egusphere-2024-1138, https://doi.org/10.5194/egusphere-2024-1138, 2024
Short summary
Short summary
Many Earth surface processes are controlled by the spatial pattern of surface water flow. We review commonly used methods for predicting such spatial patterns in digital landform models and document the pros and cons of commonly used methods. We propose a new method that is designed to minimize those limitations and show that it works well in a variety of test cases.
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
Short summary
Short summary
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.
Janbert Aarnink, Tom Beucler, Marceline Vuaridel, and Virginia Ruiz-Villanueva
EGUsphere, https://doi.org/10.5194/egusphere-2024-792, https://doi.org/10.5194/egusphere-2024-792, 2024
Short summary
Short summary
This study presents a novel CNN approach for detecting instream large wood in rivers, addressing the need for flexible monitoring methods that can be used on a variety of data sources. Leveraging a database of 15,228 fully labeled images, our model achieved a 67 % weighted mean average precision. Fine-tuning parameters and sampling techniques offer potential for further performance enhancement of more than 10 % in certain cases, promising valuable insights for ecosystem management.
Orie Cecil, Nicholas Cohn, Matthew Farthing, Sourav Dutta, and Andrew Trautz
EGUsphere, https://doi.org/10.5194/egusphere-2024-855, https://doi.org/10.5194/egusphere-2024-855, 2024
Short summary
Short summary
Using computational fluid dynamics, we analyze the error trends of an analytical shear stress distribution model used to drive aeolian transport for coastal dunes which are an important line of defense against storm related flooding hazards. We find that compared to numerical simulations, the analytical model results in a net overprediction of the landward migration rate. Additionally, two data-driven approaches are proposed for reducing the error while maintaining computational efficiency.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
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
Short summary
Short summary
River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments to show that particles in the 1–5 mm range (i) are the finest range not easily suspended by alluvial flood flows, (ii) are transported preferentially over coarser gravel, and (iii), within limits, are also transported preferentially over sand. We show how fluid viscosity mediates the special status of sediment in this range.
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
Short summary
Short summary
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.
Caroline Fenske, Jean Braun, François Guillocheau, and Cécile Robin
EGUsphere, https://doi.org/10.5194/egusphere-2024-160, https://doi.org/10.5194/egusphere-2024-160, 2024
Short summary
Short summary
We have developed a new numerical model to represent the formation of ferricretes which are iron-rich, hard layers found in soils and at the surface of the Earth. We assume that the formation mechanism implies variations in the height of the water table and that the hardening rate is proportional to precipitation. The model allows us to quantify the potential feedbacks they generate on the surface topography and the thickness of the regolith/soil layer.
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
Hydrophones are used to monitor sediment transport in the river by listening to the acoustic noise generated by particle impacts on the riverbed. However, this acoustic noise is modified by the river flow and can cause misleading information about sediment transport. This article proposes a model that corrects the measured acoustic signal. Testing the model showed that the corrected signal is better correlated with bedload flux in the river.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 105–115, https://doi.org/10.5194/esurf-12-105-2024, https://doi.org/10.5194/esurf-12-105-2024, 2024
Short summary
Short summary
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
Short summary
Short summary
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
Short summary
Short summary
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.
Cited articles
Allen, J. R. L.: The Severn Estuary in southwest Britain: its retreat under
marine transgression, and fine-sediment regime, Sediment. Geol., 66, 13–28,
https://doi.org/10.1016/0037-0738(90)90003-C, 1990.
Allen, J. R. L.: The Landscape Archaeology of the Lydney Level,
Gloucestershire: natural and human transformations over the last two
millennia, Trans. Bristol & Gloucestershire Archaeological Society, 119,
27–57, 2001.
Allen, J. R. L. and Rae, J. E.: Late Flandrian Shoreline Oscillations in the
Severn Estuary: A Geomorphological and Stratigraphical Reconnaissance,
Philos. T. R. Soc. B, 315,
185–230, https://doi.org/10.1098/rstb.1987.0007, 1987.
Archer, A. W.: World's highest tides: Hypertidal coastal systems in North
America, South America and Europe, Sediment. Geol., 284–285, 1–25,
https://doi.org/10.1016/j.sedgeo.2012.12.007, 2013.
Bain, O., Toulec, R., Combaud, A., Villemagne, G., and Barrier, P.: Five
years of beach drainage survey on a macrotidal beach (Quend-Plage, northern
France), C. R. Geosci., 348, 411–421,
https://doi.org/10.1016/j.crte.2016.04.003, 2016.
Barnhart, T. and Crosby, B.: Comparing Two Methods of Surface Change
Detection on an Evolving Thermokarst Using High-Temporal-Frequency
Terrestrial Laser Scanning, Selawik River, Alaska, Remote Sens.-Basel, 5,
2813–2837, https://doi.org/10.3390/rs5062813, 2013.
Bendoni, M., Francalanci, S., Cappietti, L., and Solari, L.: On salt marshes
retreat: Experiments and modeling toppling failures induced by wind waves,
J. Geophys. Res.-Earth, 119, 603–620,
https://doi.org/10.1002/2013JF002967, 2014.
British Standard Institution: British Standard Methods of Test for Soils for
Civil Engineering Purposes BS1377-2, British Standard, ISBN 0 580 17692 4, 1990.
Brooks, S. M., Spencer, T., and Boreham, S.: Deriving mechanisms and
thresholds for cliff retreat in soft-rock cliffs under changing climates:
Rapidly retreating cliffs of the Suffolk coast, UK, Geomorphology, 153–154,
48–60, https://doi.org/10.1016/J.GEOMORPH.2012.02.007, 2012.
Carniello, L., Defina, A., and D'Alpaos, L.: Morphological evolution of the
Venice lagoon: Evidence from the past and trend for the future, J. Geophys.
Res., 114, F04002, https://doi.org/10.1029/2008JF001157, 2009.
Carvalho, R. C. and Woodroffe, C. D.: Sediment budget of a river-fed
wave-dominated coastal compartment, Mar. Geol., 441, 106617,
https://doi.org/10.1016/j.margeo.2021.106617, 2021.
Casagli, N., Rinaldi, M., Gargini, A., and Curini, A.: Pore water pressure
and streambank stability: results from a monitoring site on the Sieve River,
Italy, Earth Surf. Proc. Land., 24, 1095–1114,
https://doi.org/10.1002/(SICI)1096-9837(199911)24:12<1095::AID-ESP37>3.0.CO;2-F, 1999.
Crowther, S., Dickson, A., and and Truscoe, K.: Rapid Coastal Zone
Assessment Survey, National Mapping Programme, 298 pp., https://historicengland.org.uk/research/results/reports/102-2008 (last access: October 2020), 2008.
D'Alpaos, A., Lanzoni, S., Marani, M., and Rinaldo, A.: Landscape evolution
in tidal embayments: Modeling the interplay of erosion, sedimentation, and
vegetation dynamics, J. Geophys. Res., 112, F01008,
https://doi.org/10.1029/2006JF000537, 2007.
Dapporto, S., Rinaldi, M., and Casagli, N.: Failure mechanisms and pore
water pressure conditions: analysis of a riverbank along the Arno River
(Central Italy), Eng. Geol., 61, 221–242,
https://doi.org/10.1016/S0013-7952(01)00026-6, 2001.
Darby, S. E. and Thorne, C. R.: Development and Testing of
Riverbank-Stability Analysis, J. Hydraul. Eng., 122,
443–454, https://doi.org/10.1061/(ASCE)0733-9429(1996)122:8(443), 1996a.
Darby, S. E. and Thorne, C. R.: Stability analysis for steep, eroding,
cohesive riverbanks, J. Hydraul. Eng., 122, 443–454, 1996b.
Darby, S. E., Gessler, D., and Thorne, C. R.: Computer program for stability
analysis of steep, cohesive riverbanks, Earth Surf. Proc. Land., 25,
175–190, https://doi.org/10.1002/(SICI)1096-9837(200002)25:2<175::AID-ESP74>3.0.CO;2-K, 2000.
Darby, S. E., Trieu, H. Q., Carling, P. A., Sarkkula, J., Koponen, J.,
Kummu, M., Conlan, I., and Leyland, J.: A physically based model to predict
hydraulic erosion of fine-grained riverbanks: The role of form roughness in
limiting erosion, J. Geophys. Res., 115, F04003,
https://doi.org/10.1029/2010JF001708, 2010.
del Río, L. and Gracia, F. J.: Erosion risk assessment of active
coastal cliffs in temperate environments, Geomorphology, 112, 82–95,
https://doi.org/10.1016/J.GEOMORPH.2009.05.009, 2009.
Duong Thi, T. and do Minh, D.: Riverbank Stability Assessment under River
Water Level Changes and Hydraulic Erosion, Water-Basel, 11, 2598,
https://doi.org/10.3390/w11122598, 2019.
EUROSION: Living with coastal erosion in Europe: Sediment and Space for
Sustainability, http://www.eurosion.org/reports-online/part4.pdf (last access: July 2019), 2004.
Fairchild, T. P., Bennett, W. G., Smith, G., Day, B., Skov, M. W.,
Möller, I., Beaumont, N., Karunarathna, H., and Griffin, J. N.: Coastal
wetlands mitigate storm flooding and associated costs in estuaries,
Environ. Res. Lett., 16, 074034,
https://doi.org/10.1088/1748-9326/ac0c45, 2021.
Foresight: Foresight report looking at the risks to the UK from flooding and
coastal erosion over the next 100 years, https://www.gov.uk/government/publications/future-flooding (last access: February 2021), 2004.
Freeze, R. A. and Cherry, J. A.: Groundwater, Prentice-Hall Inc., Englewood Cliffs, 7632, 604 pp., ISBN 0-13-365312-9, 1979.
GeoSlope International Ltd: Stability Modeling with GeoStudio, Calgary,
Alberta, Canada, 252 pp., https://downloads.geoslope.com/geostudioresources/books/23/1/SlopeStabilityModeling.pdf (last access: January 2019), 2018.
Gong, Z., Zhao, K., Zhang, C., Dai, W., Coco, G., and Zhou, Z.: The role of
bank collapse on tidal creek ontogeny: A novel process-based model for bank
retreat, Geomorphology, 311, 13–26,
https://doi.org/10.1016/j.geomorph.2018.03.016, 2018.
Guo, L., Xu, F., van der Wegen, M., Townend, I., Wang, Z. B., and He, Q.:
Morphodynamic adaptation of a tidal basin to centennial sea-level rise: The
importance of lateral expansion, Cont. Shelf Res., 226, 104494,
https://doi.org/10.1016/j.csr.2021.104494, 2021.
Hackney, C., Darby, S. E., and Leyland, J.: Modelling the response of soft
cliffs to climate change: A statistical, process-response model using
accumulated excess energy, Geomorphology, 187, 108–121,
https://doi.org/10.1016/J.GEOMORPH.2013.01.005, 2013.
Hackney, C., Best, J., Leyland, J., Darby, S. E., Parsons, D., Aalto, R.,
and Nicholas, A. P.: Modulation of outer bank erosion by slump blocks:
Disentangling the protective and destructive role of failed material on the
three-dimensional flow structure, Geophys. Res. Lett., 42, 10663–10670,
https://doi.org/10.1002/2015GL066481, 2015.
Harris, P., Muelbert, J., Muniz, P., Yin, K., Ahmed, K., Folorunsho, R., Caso, M., Vale. C. C., Machiwa, J., Ferreira, B., Bernal, P., and Rice, J.: Estuaries and Deltas, in: United Nations World Ocean Assessment, edited by: Inniss, L., Simcock, A., Yoanes Ajawin, A., Alcala, A. C., Bernal, P., Calumpong, H. P., Eghtesadi Araghi, P., Green, S. O., Harris, P. T., Kamara, O. K., Kohata, K., Marschoff, E., Martin, G., Padovani Ferreira, B., Park, C., Payet, R. A., Rice, J., Rosenberg, A., Ruwa, R., Tuhumwire, J. T., van Gaever, S., Wang, J., and W˛esławski, J. M., United Nations, https://www.un.org/Depts/los/global_reporting/WOA_RegProcess.htm (last access: March 2021), 2016.
Hird, S., Stokes, C., and Masselink, G.: Emergent coastal behaviour results
in extreme dune erosion decoupled from hydrodynamic forcing, Mar. Geol., 442,
106667, https://doi.org/10.1016/j.margeo.2021.106667, 2021.
James, M. R., Robson, S., and Smith, M. W.: 3-D uncertainty-based
topographic change detection with structure-from-motion photogrammetry:
precision maps for ground control and directly georeferenced surveys, Earth
Surf. Proc. Land., 42, 1769–1788, https://doi.org/10.1002/esp.4125, 2017.
Javernick, L., Brasington, J., and Caruso, B.: Modeling the topography of
shallow braided rivers using Structure-from-Motion photogrammetry,
Geomorphology, 213, 166–182,
https://doi.org/10.1016/J.GEOMORPH.2014.01.006, 2014.
Jolivet, M., Anthony, E. J., Gardel, A., and Brunier, G.: Multi-Decadal to
Short-Term Beach and Shoreline Mobility in a Complex River-Mouth Environment
Affected by Mud From the Amazon, Front. Earth Sci.-Lausanne, 7, 187,
https://doi.org/10.3389/feart.2019.00187, 2019.
Julian, J. P. and Torres, R.: Hydraulic erosion of cohesive riverbanks,
Geomorphology, 76, 193–206, https://doi.org/10.1016/J.GEOMORPH.2005.11.003,
2006.
Kermani, S., Boutiba, M., Guendouz, M., Guettouche, M. S., and Khelfani, D.:
Detection and analysis of shoreline changes using geospatial tools and
automatic computation: Case of jijelian sandy coast (East Algeria), Ocean
Coast. Manage., 132, 46–58, https://doi.org/10.1016/j.ocecoaman.2016.08.010,
2016.
Lague, D., Brodu, N., and Leroux, J.: Accurate 3D comparison of complex
topography with terrestrial laser scanner: Application to the Rangitikei
canyon (N-Z), ISPRS J. Photogramm., 82,
10–26, https://doi.org/10.1016/j.isprsjprs.2013.04.009, 2013.
Lawler, D. M., Thorne, C. R., and Hooke, J. M.: Bank erosion and
instability, in: Applied Fluvial Geomorphology for River Engineering and
Management, edited by: Thorne, C. R., Hey, R. D., and Newson, M. D., John
Wiley and Sons Ltd, 137–172, ISBN 0-471-96968-0, 1997.
Leonardi, N. and Fagherazzi, S.: Effect of local variability in erosional
resistance on large-scale morphodynamic response of salt marshes to wind
waves and extreme events, Geophys. Res. Lett., 42, 5872–5879,
https://doi.org/10.1002/2015GL064730, 2015.
Leyland, J. and Darby, S. E.: An empirical–conceptual gully evolution model
for channelled sea cliffs, Geomorphology, 102, 419–434,
https://doi.org/10.1016/J.GEOMORPH.2008.04.017, 2008.
Li, J., Yan, D., Yao, X., Liu, Y., Xie, S., Sheng, Y., and Luan, Z.:
Dynamics of Carbon Storage in Saltmarshes Across China's Eastern Coastal
Wetlands From 1987 to 2020, Front. Mar. Sci., 9, 915727,
https://doi.org/10.3389/fmars.2022.915727, 2022.
Luppi, L., Rinaldi, M., Teruggi, L. B., Darby, S. E., and Nardi, L.:
Monitoring and numerical modelling of riverbank erosion processes: a case
study along the Cecina River (central Italy), Earth Surf. Proc. Land., 34,
530–546, https://doi.org/10.1002/esp.1754, 2009.
Majumdar, S. and Mandal, S.: Assessment of geotechnical properties of the
bank sediment to investigate the riverbank's stability along the Ganga river
within the stretch of Malda district, West Bengal, India, Sustain Water
Resour. Manag., 8, 44, https://doi.org/10.1007/s40899-022-00637-w, 2022.
Marani, M., D'Alpaos, A., Lanzoni, S., and Santalucia, M.: Understanding and
predicting wave erosion of marsh edges, Geophys. Res. Lett., 38, L21401,
https://doi.org/10.1029/2011GL048995, 2011.
Masselink, G., Scott, T., Poate, T., Russell, P., Davidson, M., and Conley,
D.: The extreme 2013/2014 winter storms: hydrodynamic forcing and coastal
response along the southwest coast of England, Earth Surf. Proc. Land., 41,
378–391, https://doi.org/10.1002/esp.3836, 2016.
MCCIP: Marine Climate Change Impacts: Report Card 2020, Summary Report, in:
Summary Report, https://www.mccip.org.uk/sites/default/files/2021-07/mccip-report-card-2020_webversion.pdf (last access: January 2022), 2020.
Mel, R. A., Bendoni, M., and Steffinlongo, D.: Salt-marsh retreat on
different time scales: Issues and prospects from a 5-year monitoring
campaign in the Venice Lagoon, Earth Surf. Proc. Land., 47, 1989–2005,
https://doi.org/10.1002/esp.5359, 2022.
Met Office: UK storm season 2018/19,
https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-storm-centre/uk-storm-season-2018-19
(last access: 20 December 2021), 2019.
Met Office: UK storm season 2019/20,
https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-storm-centre/uk-storm-season-2019-20
(last access: 20 December 2021), 2020.
Micheletti, N., Chandler, J. H., and Lane, S. N.: Investigating the
geomorphological potential of freely available and accessible
structure-from-motion photogrammetry using a smartphone, Earth Surf. Proc.
Land., 40, 473–486, https://doi.org/10.1002/esp.3648, 2015.
Möller, I., Kudella, M., Rupprecht, F., Spencer, T., Paul, M., van
Wesenbeeck, B. K., Wolters, G., Jensen, K., Bouma, T. J., Miranda-Lange, M.,
and Schimmels, S.: Wave attenuation over coastal salt marshes under storm
surge conditions, Nat. Geosci., 7, 727–731, https://doi.org/10.1038/ngeo2251,
2014.
Morgenstern, N. R. and Price, V. E.: The Analysis of the Stability of
General Slip Surfaces, Géotechnique, 15, 79–93,
https://doi.org/10.1680/geot.1965.15.1.79, 1965.
Motta, D., Langendoen, E. J., Abad, J. D., and García, M. H.: Modification of meander migration by bank failures, J. Geophys. Res.-Earth, 119, 1026–1042, https://doi.org/10.1002/2013JF002952, 2014.
Nardi, L., Rinaldi, M., and Solari, L.: An experimental investigation on
mass failures occurring in a riverbank composed of sandy gravel,
Geomorphology, 163–164, 56–69,
https://doi.org/10.1016/J.GEOMORPH.2011.08.006, 2012.
Patsinghasanee, S., Kimura, I., Shimizu, Y., and Nabi, M.: Experiments and
modelling of cantilever failures for cohesive riverbanks, J.
Hydraul. Res., 56, 76–95, https://doi.org/10.1080/00221686.2017.1300194, 2018.
Pendleton, L., Donato, D. C., Murray, B. C., Crooks, S., Jenkins, W. A.,
Sifleet, S., Craft, C., Fourqurean, J. W., Kauffman, J. B., Marbà, N.,
Megonigal, P., Pidgeon, E., Herr, D., Gordon, D., and Baldera, A.:
Estimating Global “Blue Carbon” Emissions from Conversion and Degradation
of Vegetated Coastal Ecosystems, PLoS One, 7, e43542,
https://doi.org/10.1371/journal.pone.0043542, 2012.
Pye, K. and Blott, S. J.: The geomorphology of UK estuaries: The role of
geological controls, antecedent conditions and human activities, Estuar.
Coast. Shelf S., 150, 196–214, https://doi.org/10.1016/J.ECSS.2014.05.014,
2014.
Rinaldi, M. and Nardi, L.: Modeling Interactions between Riverbank Hydrology
and Mass Failures, J. Hydrol. Eng., 18, 1231–1240,
https://doi.org/10.1061/(ASCE)HE.1943-5584.0000716, 2013.
Rinaldi, M., Casagli, N., Dapporto, S., and Gargini, A.: Monitoring and
modelling of pore water pressure changes and riverbank stability during flow
events, Earth Surf. Proc. Land., 29, 237–254,
https://doi.org/10.1002/esp.1042, 2004.
Rinaldi, M., Mengoni, B., Luppi, L., Darby, S. E., and Mosselman, E.:
Numerical simulation of hydrodynamics and bank erosion in a river bend,
Water Resour. Res., 44, W09428, https://doi.org/10.1029/2008WR007008, 2008.
Rosas, J., Lopez, O., Missimer, T. M., Coulibaly, K. M., Dehwah, A. H. A.,
Sesler, K., Lujan, L. R., and Mantilla, D.: Determination of Hydraulic
Conductivity from Grain-Size Distribution for Different Depositional
Environments, Groundwater, 52, 399–413, https://doi.org/10.1111/gwat.12078, 2014.
Rosnell, T. and Honkavaara, E.: Point Cloud Generation from Aerial Image
Data Acquired by a Quadrocopter Type Micro Unmanned Aerial Vehicle and a
Digital Still Camera, Sensors, 12, 453–480,
https://doi.org/10.3390/S120100453, 2012.
Roy, S., Pandit, S., Papia, M., Rahman, M. M., Otto Rehder Ocampo, J. C.,
Razi, M. A., Fraile-Jurado, P., Ahmed, N., Al-Amin Hoque, M., Hasan, M. M.,
Yeasmin, J., and Hossain, M. S.: Coastal erosion risk assessment in the
dynamic estuary: The Meghna estuary case of Bangladesh coast, Int.
J. Disast. Risk Re., 61, 102364,
https://doi.org/10.1016/j.ijdrr.2021.102364, 2021.
Shimozono, T., Tajima, Y., Akamatsu, S., Matsuba, Y., and Kawasaki, A.:
Large-Scale Channel Migration in the Sittang River Estuary, Sci. Rep., 9,
9862, https://doi.org/10.1038/s41598-019-46300-x, 2019.
Springer, F. M., Ullrich, C. R., and Hagerty, D. J.: Streambank Stability,
J. Geotech. Eng.-ASCE, 111, 624–640,
https://doi.org/10.1061/(ASCE)0733-9410(1985)111:5(624), 1985.
Thieler, E. R. and Danforth, W. W.: Historical Shoreline Mapping (I):
Improving Techniques and Reducing Positioning Errors, J. Coastal. Res., 10,
549–563, 1994.
Thorne, C. R. and Abt, S. R.: Analysis of riverbank instability due to toe
scour and lateral erosion, Earth Surf. Proc. Land., 18, 835–843,
https://doi.org/10.1002/esp.3290180908, 1993.
Thorne, C. R. and Tovey, N. K.: Stability of composite river banks, Earth
Surf. Proc. Land., 6, 469–484, https://doi.org/10.1002/esp.3290060507,
1981.
Twidale, C. R.: Erosion of an alluvial bank at Birdwood, South Australia,
Geomorphology, 8, 189–211, 1964.
Wolanski, E. and Elliott, M.: Estuarine water circulation, in: Estuarine
Ecohydrology, Elsevier, 35–76,
https://doi.org/10.1016/B978-0-444-63398-9.00002-7, 2016.
Wood, A. L., Simon, A., Downs, P. W., and Thorne, C. R.: Bank-toe processes
in incised channels: the role of apparent cohesion in the entrainment of
failed bank materials, Hydrol. Process., 15, 39–61,
https://doi.org/10.1002/hyp.151, 2001.
Young, A. P., Flick, R. E., O'Reilly, W. C., Chadwick, D. B., Crampton, W.
C., and Helly, J. J.: Estimating cliff retreat in southern California
considering sea level rise using a sand balance approach, Mar. Geol., 348,
15–26, https://doi.org/10.1016/J.MARGEO.2013.11.007, 2014.
Zhang, K., Douglas, B. C., and Leatherman, S. P.: Global Warming and Coastal
Erosion, Clim. Change, 64, 41–58,
https://doi.org/10.1023/B:CLIM.0000024690.32682.48, 2004.
Zhang, K., Gong, Z., Zhao, K., Wang, K., Pan, S., and Coco, G.: Experimental
and Numerical Modeling of Overhanging Riverbank Stability, J. Geophys. Res.-Earth, 126, e2021JF006109, https://doi.org/10.1029/2021JF006109, 2021.
Zhao, K., Gong, Z., Xu, F., Zhou, Z., Zhang, C. K., Perillo, G. M. E., and
Coco, G.: The Role of Collapsed Bank Soil on Tidal Channel Evolution: A
Process-Based Model Involving Bank Collapse and Sediment Dynamics, Water
Resour. Res., 55, 9051–9071, https://doi.org/10.1029/2019WR025514, 2019.
Zhao, K., Coco, G., Gong, Z., Darby, S. E., Lanzoni, S., Xu, F., Zhang, K.,
and Townend, I.: A Review on Bank Retreat: Mechanisms, Observations, and
Modeling, Rev. Geophys., 60, e2021RG000761, https://doi.org/10.1029/2021RG000761,
2022.
Short summary
In this study the processes leading to bank failures in the hypertidal Severn Estuary are studied employing numerical models and field observations. Results highlight that the periodic fluctuations in water levels drive an imbalance in the resisting (hydrostatic pressure) versus driving (pore water pressure) forces causing a frequent oscillation of bank stability between stable (at high tide) and unstable states (at low tide) both on semidiurnal bases and in the spring–neap transition.
In this study the processes leading to bank failures in the hypertidal Severn Estuary are...
