Articles | Volume 10, issue 4
https://doi.org/10.5194/esurf-10-705-2022
© Author(s) 2022. 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-10-705-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jul 2022
Research article |
| 14 Jul 2022
| 14 Jul 2022
The imprint of erosion by glacial lake outburst floods in the topography of central Himalayan rivers
Maxwell P. Dahlquist
CORRESPONDING AUTHOR
Department of Earth and Environmental Systems, Sewanee, The University of the South, Sewanee, TN 37383, USA
A. Joshua West
Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089, USA
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Martha Cary Eppes, Alex Rinehart, Jennifer Aldred, Samantha Berberich, Maxwell P. Dahlquist, Sarah G. Evans, Russell Keanini, Stephen E. Laubach, Faye Moser, Mehdi Morovati, Steven Porson, Monica Rasmussen, and Uri Shaanan
Earth Surf. Dynam., 12, 35–66, https://doi.org/10.5194/esurf-12-35-2024, https://doi.org/10.5194/esurf-12-35-2024, 2024
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All rocks have fractures (cracks) that can influence virtually every process acting on Earth's surface where humans live. Yet, scientists have not standardized their methods for collecting fracture data. Here we draw on past work across geo-disciplines and propose a list of baseline data for fracture-focused surface process research. We detail the rationale and methods for collecting them. We hope their wide adoption will improve future methods and knowledge of rock fracture overall.
Martha Cary Eppes, Alex Rinehart, Jennifer Aldred, Samantha Berberich, Maxwell P. Dahlquist, Sarah G. Evans, Russell Keanini, Stephen E. Laubach, Faye Moser, Mehdi Morovati, Steven Porson, Monica Rasmussen, and Uri Shaanan
Earth Surf. Dynam., 12, 35–66, https://doi.org/10.5194/esurf-12-35-2024, https://doi.org/10.5194/esurf-12-35-2024, 2024
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All rocks have fractures (cracks) that can influence virtually every process acting on Earth's surface where humans live. Yet, scientists have not standardized their methods for collecting fracture data. Here we draw on past work across geo-disciplines and propose a list of baseline data for fracture-focused surface process research. We detail the rationale and methods for collecting them. We hope their wide adoption will improve future methods and knowledge of rock fracture overall.
Emily I. Burt, Gregory R. Goldsmith, Roxanne M. Cruz-de Hoyos, Adan Julian Ccahuana Quispe, and A. Joshua West
Hydrol. Earth Syst. Sci., 27, 4173–4186, https://doi.org/10.5194/hess-27-4173-2023, https://doi.org/10.5194/hess-27-4173-2023, 2023
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When it rains, water remains in the ground for variable amounts of time before it is taken up by plants or becomes streamflow. Understanding how long water stays in the ground before it is taken up by plants or becomes streamflow helps predict what will happen to the water cycle in future climates. Some studies suggest that plants take up water that has been in the ground for a long time; in contrast, we find that plants take up a significant amount of recent rain.
Emily I. Burt, Daxs Herson Coayla Rimachi, Adan Julian Ccahuana Quispe, Abra Atwood, and A. Joshua West
Hydrol. Earth Syst. Sci., 27, 2883–2898, https://doi.org/10.5194/hess-27-2883-2023, https://doi.org/10.5194/hess-27-2883-2023, 2023
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Mountains store and release water, serving as water towers for downstream regions and affecting global sediment and carbon fluxes. We use stream and rain chemistry to calculate how much streamflow comes from recent rainfall across seven sites in the Andes mountains and the nearby Amazon lowlands. We find that the type of rock and the intensity of rainfall control water retention and release, challenging assumptions that mountain topography exerts the primary effect on watershed hydrology.
Madison M. Douglas, Gen K. Li, Woodward W. Fischer, Joel C. Rowland, Preston C. Kemeny, A. Joshua West, Jon Schwenk, Anastasia P. Piliouras, Austin J. Chadwick, and Michael P. Lamb
Earth Surf. Dynam., 10, 421–435, https://doi.org/10.5194/esurf-10-421-2022, https://doi.org/10.5194/esurf-10-421-2022, 2022
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Arctic rivers erode into permafrost and mobilize organic carbon, which can react to form greenhouse gasses or be re-buried in floodplain deposits. We collected samples on a permafrost floodplain in Alaska to determine if more carbon is eroded or deposited by river meandering. The floodplain contained a mixture of young carbon fixed by the biosphere and old, re-deposited carbon. Thus, sediment storage may allow Arctic river floodplains to retain aged organic carbon even when permafrost thaws.
Florian Hofmann, Emily H. G. Cooperdock, A. Joshua West, Dominic Hildebrandt, Kathrin Strößner, and Kenneth A. Farley
Geochronology, 3, 395–414, https://doi.org/10.5194/gchron-3-395-2021, https://doi.org/10.5194/gchron-3-395-2021, 2021
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We use microCT scanning to improve the quality of 3He exposure ages measured in detrital magnetite. We show that the presence of inclusions can significantly increase the measured amount of 3He and thereby the exposure age. By prescreening magnetite with microCT and analyzing only inclusion-free grains, this problem can be avoided. We also calibrate the cosmogenic 3He production rate in magnetite relative to 10Be in quartz, which can be used for similar studies in the future.
Mark A. Torres, Ajay B. Limaye, Vamsi Ganti, Michael P. Lamb, A. Joshua West, and Woodward W. Fischer
Earth Surf. Dynam., 5, 711–730, https://doi.org/10.5194/esurf-5-711-2017, https://doi.org/10.5194/esurf-5-711-2017, 2017
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In this paper, we describe a new model for the storage times of sediments and organic carbon (OC) in river deposits. Comparisons between our model predictions and field data show good agreement, which suggests that our model accurately captures the relevant time and space scales. An implication of our model is that OC is stored in river deposits over geologic timescales and, as a result, we propose that fluvial storage plays a larger role in the carbon cycle than previously recognized.
K. E. Clark, A. J. West, R. G. Hilton, G. P. Asner, C. A. Quesada, M. R. Silman, S. S. Saatchi, W. Farfan-Rios, R. E. Martin, A. B. Horwath, K. Halladay, M. New, and Y. Malhi
Earth Surf. Dynam., 4, 47–70, https://doi.org/10.5194/esurf-4-47-2016, https://doi.org/10.5194/esurf-4-47-2016, 2016
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The key findings of this paper are that landslides in the eastern Andes of Peru in the Kosñipata Valley rapidly turn over the landscape in ~1320 years, with a rate of 0.076% yr-1. Additionally, landslides were concentrated at lower elevations, due to an intense storm in 2010 accounting for ~1/4 of the total landslide area over the 25-year remote sensing study. Valley-wide carbon stocks were determined, and we estimate that 26 tC km-2 yr-1 of soil and biomass are stripped by landslides.
P. A. Baker, S. C. Fritz, C. G. Silva, C. A. Rigsby, M. L. Absy, R. P. Almeida, M. Caputo, C. M. Chiessi, F. W. Cruz, C. W. Dick, S. J. Feakins, J. Figueiredo, K. H. Freeman, C. Hoorn, C. Jaramillo, A. K. Kern, E. M. Latrubesse, M. P. Ledru, A. Marzoli, A. Myrbo, A. Noren, W. E. Piller, M. I. F. Ramos, C. C. Ribas, R. Trnadade, A. J. West, I. Wahnfried, and D. A. Willard
Sci. Dril., 20, 41–49, https://doi.org/10.5194/sd-20-41-2015, https://doi.org/10.5194/sd-20-41-2015, 2015
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We report on a planned Trans-Amazon Drilling Project (TADP) that will continuously sample Late Cretaceous to modern sediment in a transect along the equatorial Amazon of Brazil, from the Andean foreland to the Atlantic Ocean. The TADP will document the evolution of the Neotropical forest and will link biotic diversification to changes in the physical environment, including climate, tectonism, and landscape. We will also sample the ca. 200Ma basaltic sills that underlie much of the Amazon.
A. J. West, M. Arnold, G. AumaÎtre, D. L. Bourlès, K. Keddadouche, M. Bickle, and T. Ojha
Earth Surf. Dynam., 3, 363–387, https://doi.org/10.5194/esurf-3-363-2015, https://doi.org/10.5194/esurf-3-363-2015, 2015
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Soils are vital resources put at risk by erosional loss. Evaluating agricultural effects on erosion is complicated where natural rates are high, as in central Nepal. This study infers erosion rates over thousands of years and compares these rates to those observed over the short term. Results suggest that effects of agriculture are small and that most erosion takes place through natural processes. However, present-day erosion on degraded lands is significantly faster than over the long term.
K. E. Clark, M. A. Torres, A. J. West, R. G. Hilton, M. New, A. B. Horwath, J. B. Fisher, J. M. Rapp, A. Robles Caceres, and Y. Malhi
Hydrol. Earth Syst. Sci., 18, 5377–5397, https://doi.org/10.5194/hess-18-5377-2014, https://doi.org/10.5194/hess-18-5377-2014, 2014
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This paper presents measurements of the balance of water inputs and outputs over 1 year for a river basin in the Andes of Peru. Our results show that the annual water budget is balanced within a few percent uncertainty; that is to say, the amount of water entering the basin was the same as the amount leaving, providing important information for understanding the water cycle. We also show that seasonal storage of water is important in sustaining the flow of water during the dry season.
R. G. Hilton, A. Galy, A. J. West, N. Hovius, and G. G. Roberts
Biogeosciences, 10, 1693–1705, https://doi.org/10.5194/bg-10-1693-2013, https://doi.org/10.5194/bg-10-1693-2013, 2013
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
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
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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
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Andrew Hollyday, Maureen E. Raymo, Jacqueline Austermann, Fred Richards, Mark Hoggard, and Alessio Rovere
Earth Surf. Dynam., 12, 883–905, https://doi.org/10.5194/esurf-12-883-2024, https://doi.org/10.5194/esurf-12-883-2024, 2024
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Sea level was significantly higher during the Pliocene epoch, around 3 million years ago. The present-day elevations of shorelines that formed in the past provide a data constraint on the extent of ice sheet melt and the global sea level response under warm Pliocene conditions. In this study, we identify 10 escarpments that formed from wave-cut erosion during Pliocene times and compare their elevations with model predictions of solid Earth deformation processes to estimate past sea level.
Gregory A. Ruetenik, Ken L. Ferrier, and Odin Marc
Earth Surf. Dynam., 12, 863–881, https://doi.org/10.5194/esurf-12-863-2024, https://doi.org/10.5194/esurf-12-863-2024, 2024
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Fluvial sediment fluxes increased dramatically in Taiwan during Typhoon Morakot in 2009, which produced some of the heaviest landsliding on record. We analyzed fluvial discharge and suspended sediment concentration data at 87 gauging stations across Taiwan to quantify fluvial sediment responses since Morakot. In basins heavily impacted by landsliding, rating curve coefficients sharply increased during Morakot and then declined exponentially with a characteristic decay time of <10 years.
Nil Carrion-Bertran, Albert Falqués, Francesca Ribas, Daniel Calvete, Rinse de Swart, Ruth Durán, Candela Marco-Peretó, Marta Marcos, Angel Amores, Tim Toomey, Àngels Fernández-Mora, and Jorge Guillén
Earth Surf. Dynam., 12, 819–839, https://doi.org/10.5194/esurf-12-819-2024, https://doi.org/10.5194/esurf-12-819-2024, 2024
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The sensitivity to the wave and sea-level forcing sources in predicting a 6-month embayed beach evolution is assessed using two different morphodynamic models. After a successful model calibration using in situ data, other sources are applied. The wave source choice is critical: hindcast data provide wrong results due to an angle bias, whilst the correct dynamics are recovered with the wave conditions from an offshore buoy. The use of different sea-level sources gives no significant differences.
Thomas J. Barnes, Thomas V. Schuler, Simon Filhol, and Karianne S. Lilleøren
Earth Surf. Dynam., 12, 801–818, https://doi.org/10.5194/esurf-12-801-2024, https://doi.org/10.5194/esurf-12-801-2024, 2024
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In this paper, we use machine learning to automatically outline landforms based on their characteristics. We test several methods to identify the most accurate and then proceed to develop the most accurate to improve its accuracy further. We manage to outline landforms with 65 %–75 % accuracy, at a resolution of 10 m, thanks to high-quality/high-resolution elevation data. We find that it is possible to run this method at a country scale to quickly produce landform inventories for future studies.
Eric Petersen, Regine Hock, and Michael G. Loso
Earth Surf. Dynam., 12, 727–745, https://doi.org/10.5194/esurf-12-727-2024, https://doi.org/10.5194/esurf-12-727-2024, 2024
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Ice cliffs are melt hot spots that increase melt rates on debris-covered glaciers which otherwise see a reduction in melt rates. In this study, we show how surface runoff streams contribute to the generation, evolution, and survival of ice cliffs by carving into the glacier and transporting rocky debris. On Kennicott Glacier, Alaska, 33 % of ice cliffs are actively influenced by streams, while nearly half are within 10 m of streams.
Daniel O'Hara, Liran Goren, Roos M. J. van Wees, Benjamin Campforts, Pablo Grosse, Pierre Lahitte, Gabor Kereszturi, and Matthieu Kervyn
Earth Surf. Dynam., 12, 709–726, https://doi.org/10.5194/esurf-12-709-2024, https://doi.org/10.5194/esurf-12-709-2024, 2024
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Understanding how volcanic edifices develop drainage basins remains unexplored in landscape evolution. Using digital evolution models of volcanoes with varying ages, we quantify the geometries of their edifices and associated drainage basins through time. We find that these metrics correlate with edifice age and are thus useful indicators of a volcano’s history. We then develop a generalized model for how volcano basins develop and compare our results to basin evolution in other settings.
Brayden Noh, Omar Wani, Kieran B. J. Dunne, and Michael P. Lamb
Earth Surf. Dynam., 12, 691–708, https://doi.org/10.5194/esurf-12-691-2024, https://doi.org/10.5194/esurf-12-691-2024, 2024
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In this paper, we propose a framework for generating risk maps that provide the probabilities of erosion due to river migration. This framework uses concepts from probability theory to learn the river migration model's parameter values from satellite data while taking into account parameter uncertainty. Our analysis shows that such geomorphic risk estimation is more reliable than models that do not explicitly consider various sources of variability and uncertainty.
Steven Y. J. Lai, David Amblas, Aaron Micallef, and Hervé Capart
Earth Surf. Dynam., 12, 621–640, https://doi.org/10.5194/esurf-12-621-2024, https://doi.org/10.5194/esurf-12-621-2024, 2024
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This study explores the creation of submarine canyons and hanging-wall fans on active faults, which can be defined by gravity-dominated breaching and underflow-dominated diffusion processes. The study reveals the self-similarity in canyon–fan long profiles, uncovers Hack’s scaling relationship and proposes a formula to estimate fan volume using canyon length. This is validated by global data from source-to-sink systems, providing insights into deep-water sedimentary processes.
Anuska Narayanan, Sagy Cohen, and John R. Gardner
Earth Surf. Dynam., 12, 581–599, https://doi.org/10.5194/esurf-12-581-2024, https://doi.org/10.5194/esurf-12-581-2024, 2024
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This study investigates the profound impact of deforestation in the Amazon on sediment dynamics. Novel remote sensing data and statistical analyses reveal significant changes, especially in heavily deforested regions, with rapid effects within a year. In less disturbed areas, a 1- to 2-year lag occurs, influenced by natural sediment shifts and human activities. These findings highlight the need to understand the consequences of human activity for our planet's future.
Jacob Hardt, Tim P. Dooley, and Michael R. Hudec
Earth Surf. Dynam., 12, 559–579, https://doi.org/10.5194/esurf-12-559-2024, https://doi.org/10.5194/esurf-12-559-2024, 2024
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We investigate the reaction of salt structures on ice sheet transgressions. We used a series of sandbox models that enabled us to experiment with scaled-down versions of salt bodies from northern Germany. The strongest reactions occurred when large salt pillows were partly covered by the ice load. Subsurface salt structures may play an important role in the energy transition, e.g., as energy storage. Thus, it is important to understand all processes that affect their stability.
Prakash Pokhrel, Mikael Attal, Hugh D. Sinclair, Simon M. Mudd, and Mark Naylor
Earth Surf. Dynam., 12, 515–536, https://doi.org/10.5194/esurf-12-515-2024, https://doi.org/10.5194/esurf-12-515-2024, 2024
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Pebbles become increasingly rounded during downstream transport in rivers due to abrasion. This study quantifies pebble roundness along the length of two Himalayan rivers. We demonstrate that roundness increases with downstream distance and that the rates are dependent on rock type. We apply this to reconstructing travel distances and hence the size of ancient Himalaya. Results show that the ancient river network was larger than the modern one, indicating that there has been river capture.
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
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Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Daniel J. Ciarletta, Jennifer L. Miselis, Julie C. Bernier, and Arnell S. Forde
Earth Surf. Dynam., 12, 449–475, https://doi.org/10.5194/esurf-12-449-2024, https://doi.org/10.5194/esurf-12-449-2024, 2024
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We reconstructed the evolution of Fire Island, a barrier island in New York, USA, to identify drivers of landscape change. Results reveal Fire Island was once divided into multiple inlet-separated islands with distinct features. Later, inlets closed, and Fire Island’s landscape became more uniform as human activities intensified. The island is now less mobile and less likely to resist and recover from storm impacts and sea level rise. This vulnerability may exist for other stabilized barriers.
Chao Zhou, Xibin Tan, Yiduo Liu, and Feng Shi
Earth Surf. Dynam., 12, 433–448, https://doi.org/10.5194/esurf-12-433-2024, https://doi.org/10.5194/esurf-12-433-2024, 2024
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The drainage-divide stability provides new insights into both the river network evolution and the tectonic and/or climatic changes. Several methods have been proposed to determine the direction of drainage-divide migration. However, how to quantify the migration rate of drainage divides remains challenging. In this paper, we propose a new method to calculate the migration rate of drainage divides from high-resolution topographic data.
Moritz Altmann, Madlene Pfeiffer, Florian Haas, Jakob Rom, Fabian Fleischer, Tobias Heckmann, Livia Piermattei, Michael Wimmer, Lukas Braun, Manuel Stark, Sarah Betz-Nutz, and Michael Becht
Earth Surf. Dynam., 12, 399–431, https://doi.org/10.5194/esurf-12-399-2024, https://doi.org/10.5194/esurf-12-399-2024, 2024
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We show a long-term erosion monitoring of several sections on Little Ice Age lateral moraines with derived sediment yield from historical and current digital elevation modelling (DEM)-based differences. The first study period shows a clearly higher range of variability of sediment yield within the sites than the later periods. In most cases, a decreasing trend of geomorphic activity was observed.
Paul A. Carling
Earth Surf. Dynam., 12, 381–397, https://doi.org/10.5194/esurf-12-381-2024, https://doi.org/10.5194/esurf-12-381-2024, 2024
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Edge rounding in Shap granite glacial erratics is an irregular function of distance from the source outcrop in northern England, UK. Block shape is conservative, evolving according to block fracture mechanics – stochastic and silver ratio models – towards either of two attractor states. Progressive reduction in size occurs for blocks transported at the sole of the ice mass where the blocks are subject to compressive and tensile forces of the ice acting against a bedrock or till surface.
Cho-Hee Lee, Yeong Bae Seong, John Weber, Sangmin Ha, Dong-Eun Kim, and Byung Yong Yu
EGUsphere, https://doi.org/10.5194/egusphere-2024-198, https://doi.org/10.5194/egusphere-2024-198, 2024
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Geomorphic indices were used to understand topographic changes in response to tectonic activity. We applied indices to evaluate the relative tectonic intensity of Ulsan Fault Zone, one of the most active fault zones in Korea. We divided the UFZ into five segments based on spatial variation in intensity. We modelled the landscape evolution of study area and interpreted tectono-geomorphic history that the northern part of the UFZ experienced asymmetric uplift, while the southern part did not.
Johannes Leinauer, Michael Dietze, Sibylle Knapp, Riccardo Scandroglio, Maximilian Jokel, and Michael Krautblatter
EGUsphere, https://doi.org/10.5194/egusphere-2024-231, https://doi.org/10.5194/egusphere-2024-231, 2024
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Massive rock slope failures are a significant alpine hazard and change the earth´s surface. Therefore, we must understand what controls the preparation of such events. By correlating four years of slope displacements with meteorological and seismic data, we found that water from rain and snowmelt is the most important driver. Our approach is applicable to similar sites and indicates, where future climatic changes, e.g. in rain intensity and frequency, may alter the preparation of slope failure.
Gary Parker, Chenge An, Michael P. Lamb, Marcelo H. Garcia, Elizabeth H. Dingle, and Jeremy G. Venditti
Earth Surf. Dynam., 12, 367–380, https://doi.org/10.5194/esurf-12-367-2024, https://doi.org/10.5194/esurf-12-367-2024, 2024
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River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments to show that particles in the 1–5 mm range (i) are the finest range not easily suspended by alluvial flood flows, (ii) are transported preferentially over coarser gravel, and (iii), within limits, are also transported preferentially over sand. We show how fluid viscosity mediates the special status of sediment in this range.
Lindsay Marie Capito, Enrico Pandrin, Walter Bertoldi, Nicola Surian, and Simone Bizzi
Earth Surf. Dynam., 12, 321–345, https://doi.org/10.5194/esurf-12-321-2024, https://doi.org/10.5194/esurf-12-321-2024, 2024
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We propose that the pattern of erosion and deposition from repeat topographic surveys can be a proxy for path length in gravel-bed rivers. With laboratory and field data, we applied tools from signal processing to quantify this periodicity and used these path length estimates to calculate sediment transport using the morphological method. Our results highlight the potential to expand the use of the morphological method using only remotely sensed data as well as its limitations.
Aaron T. Steelquist, Gustav B. Seixas, Mary L. Gillam, Sourav Saha, Seulgi Moon, and George E. Hilley
EGUsphere, https://doi.org/10.5194/egusphere-2024-71, https://doi.org/10.5194/egusphere-2024-71, 2024
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The rates at which rivers erode their bed can be used to interpret the geologic history of a region. However, these rates depend significantly on the time window over which you measure. We use multiple dating methods to determine an incision rate on the San Juan River and compare it to regional rates with longer timescales. We demonstrate how specific geologic events, such as cutoffs of bedrock meander bends, are likely to preserve material we can date but also bias the rates we measure.
Xuxu Wu, Jonathan Malarkey, Roberto Fernández, Jaco H. Baas, Ellen Pollard, and Daniel R. Parsons
Earth Surf. Dynam., 12, 231–247, https://doi.org/10.5194/esurf-12-231-2024, https://doi.org/10.5194/esurf-12-231-2024, 2024
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The seabed changes from flat to rippled in response to the frictional influence of waves and currents. This experimental study has shown that the speed of this change, the size of ripples that result and even whether ripples appear also depend on the amount of sticky mud present. This new classification on the basis of initial mud content should lead to improvements in models of seabed change in present environments by engineers and the interpretation of past environments by geologists.
Andrea D'Alpaos, Davide Tognin, Laura Tommasini, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 181–199, https://doi.org/10.5194/esurf-12-181-2024, https://doi.org/10.5194/esurf-12-181-2024, 2024
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Sediment erosion induced by wind waves is one of the main drivers of the morphological evolution of shallow tidal environments. However, a reliable description of erosion events for the long-term morphodynamic modelling of tidal systems is still lacking. By statistically characterizing sediment erosion dynamics in the Venice Lagoon over the last 4 centuries, we set up a novel framework for a synthetic, yet reliable, description of erosion events in tidal systems.
Davide Tognin, Andrea D'Alpaos, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 201–218, https://doi.org/10.5194/esurf-12-201-2024, https://doi.org/10.5194/esurf-12-201-2024, 2024
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Reliable quantification of sediment transport processes is necessary to understand the fate of shallow tidal environments. Here we present a framework for the description of suspended sediment dynamics to quantify deposition in the long-term modelling of shallow tidal systems. This characterization, together with that of erosion events, allows one to set up synthetic, yet reliable, models for the long-term evolution of tidal landscapes.
Emma L. S. Graf, Hugh D. Sinclair, Mikaël Attal, Boris Gailleton, Basanta Raj Adhikari, and Bishnu Raj Baral
Earth Surf. Dynam., 12, 135–161, https://doi.org/10.5194/esurf-12-135-2024, https://doi.org/10.5194/esurf-12-135-2024, 2024
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Using satellite images, we show that, unlike other examples of earthquake-affected rivers, the rivers of central Nepal experienced little increase in sedimentation following the 2015 Gorkha earthquake. Instead, a catastrophic flood occurred in 2021 that buried towns and agricultural land under up to 10 m of sediment. We show that intense storms remobilised glacial sediment from high elevations causing much a greater impact than flushing of earthquake-induced landslides.
Mohamad Nasr, Adele Johannot, Thomas Geay, Sebastien Zanker, Jules Le Guern, and Alain Recking
Earth Surf. Dynam., 12, 117–134, https://doi.org/10.5194/esurf-12-117-2024, https://doi.org/10.5194/esurf-12-117-2024, 2024
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Hydrophones are used to monitor sediment transport in the river by listening to the acoustic noise generated by particle impacts on the riverbed. However, this acoustic noise is modified by the river flow and can cause misleading information about sediment transport. This article proposes a model that corrects the measured acoustic signal. Testing the model showed that the corrected signal is better correlated with bedload flux in the river.
Jessica Laible, Guillaume Dramais, Jérôme Le Coz, Blaise Calmel, Benoît Camenen, David J. Topping, William Santini, Gilles Pierrefeu, and François Lauters
EGUsphere, https://doi.org/10.5194/egusphere-2023-2348, https://doi.org/10.5194/egusphere-2023-2348, 2024
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Suspended-sand fluxes in rivers vary with time and space, complicating their measurement. The proposed method captures the vertical and lateral variations of suspended-sand concentration throughout a river cross section. It merges water samples taken at various positions throughout the cross section with high-resolution acoustic velocity and discharge measurements. The method also determines the sand flux uncertainty and can be easily applied to other sites using the available open-source code.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 105–115, https://doi.org/10.5194/esurf-12-105-2024, https://doi.org/10.5194/esurf-12-105-2024, 2024
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We provide a detailed characterization of the frequency, intensity and duration of flooding events at a site along the Texas coast. Our analysis demonstrates the suitability of relatively simple wave run-up models to estimate the frequency and intensity of coastal flooding. Our results validate and expand a probabilistic model of coastal flooding driven by wave run-up that can then be used in coastal risk management in response to sea level rise.
Shunsuke Oya, Fumitoshi Imaizumi, and Shoki Takayama
Earth Surf. Dynam., 12, 67–86, https://doi.org/10.5194/esurf-12-67-2024, https://doi.org/10.5194/esurf-12-67-2024, 2024
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The monitoring of pore water pressure in fully and partly saturated debris flows was performed at Ohya landslide scar, central Japan. The pore water pressure in some partly saturated flows greatly exceeded the hydrostatic pressure. The depth gradient of the pore water pressure in the lower part of the flow was generally higher than the upper part of the flow. We conclude that excess pore water pressure is present in many debris flow surges and is an important mechanism in debris flow behavior.
Gabriele Barile, Marco Redolfi, and Marco Tubino
Earth Surf. Dynam., 12, 87–103, https://doi.org/10.5194/esurf-12-87-2024, https://doi.org/10.5194/esurf-12-87-2024, 2024
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River bifurcations often show the closure of one branch (avulsion), whose causes are still poorly understood. Our model shows that when one branch stops transporting sediments, the other considerably erodes and captures much more flow, resulting in a self-sustaining process. This phenomenon intensifies when increasing the length of the branches, eventually leading to branch closure. This work may help to understand when avulsions occur and thus to design sustainable river restoration projects.
Dieter Rickenmann
Earth Surf. Dynam., 12, 11–34, https://doi.org/10.5194/esurf-12-11-2024, https://doi.org/10.5194/esurf-12-11-2024, 2024
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Field measurements of the bedload flux with a high temporal resolution in a steep mountain stream were used to analyse the transport fluctuations as a function of the flow conditions. The disequilibrium ratio, a proxy for the solid particle concentration in the flow, was found to influence the sediment transport behaviour, and above-average disequilibrium conditions – associated with a larger sediment availability on the streambed – substantially affect subsequent transport conditions.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 1–10, https://doi.org/10.5194/esurf-12-1-2024, https://doi.org/10.5194/esurf-12-1-2024, 2024
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Coastal flooding can cause significant damage to coastal ecosystems, infrastructure, and communities and is expected to increase in frequency with the acceleration of sea level rise. In order to respond to it, it is crucial to measure and model their frequency and intensity. Here, we show deep-learning techniques can be successfully used to automatically detect flooding events from complex coastal imagery, opening the way to real-time monitoring and data acquisition for model development.
Judith Y. Zomer, Bart Vermeulen, and Antonius J. F. Hoitink
Earth Surf. Dynam., 11, 1283–1298, https://doi.org/10.5194/esurf-11-1283-2023, https://doi.org/10.5194/esurf-11-1283-2023, 2023
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Secondary bedforms that are superimposed on large, primary dunes likely play a large role in fluvial systems. This study demonstrates that they can be omnipresent. Especially during peak flows, they grow large and can have steep slopes, likely affecting flood risk and sediment transport dynamics. Primary dune morphology determines whether they continuously or intermittently migrate. During discharge peaks, the secondary bedforms can become the dominant dune scale.
Matthew C. Morriss, Benjamin Lehmann, Benjamin Campforts, George Brencher, Brianna Rick, Leif S. Anderson, Alexander L. Handwerger, Irina Overeem, and Jeffrey Moore
Earth Surf. Dynam., 11, 1251–1274, https://doi.org/10.5194/esurf-11-1251-2023, https://doi.org/10.5194/esurf-11-1251-2023, 2023
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In this paper, we investigate the 28 June 2022 collapse of the Chaos Canyon landslide in Rocky Mountain National Park, Colorado, USA. We find that the landslide was moving prior to its collapse and took place at peak spring snowmelt; temperature modeling indicates the potential presence of permafrost. We hypothesize that this landslide could be part of the broader landscape evolution changes to alpine terrain caused by a warming climate, leading to thawing alpine permafrost.
Dominic T. Robson and Andreas C. W. Baas
EGUsphere, https://doi.org/10.5194/egusphere-2023-2900, https://doi.org/10.5194/egusphere-2023-2900, 2023
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We present simulations of large populations (swarms) of a type of sand dune known as barchans. Our findings reveal that the rate at which sand moves inside an asymmetric barchan is vital to the behaviour of swarms and that many observed properties of the dunes can be explained by similar rates. We also show that different directions of the wind and the density of dunes added to swarms play important roles in shaping their evolution.
Christopher Tomsett and Julian Leyland
Earth Surf. Dynam., 11, 1223–1249, https://doi.org/10.5194/esurf-11-1223-2023, https://doi.org/10.5194/esurf-11-1223-2023, 2023
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Vegetation influences how rivers change through time, yet the way in which we analyse vegetation is limited. Current methods collect detailed data at the individual plant level or determine dominant vegetation types across larger areas. Herein, we use UAVs to collect detailed vegetation datasets for a 1 km length of river and link vegetation properties to channel evolution occurring within the study site, providing a new method for investigating the influence of vegetation on river systems.
Rabab Yassine, Ludovic Cassan, Hélène Roux, Olivier Frysou, and François Pérès
Earth Surf. Dynam., 11, 1199–1221, https://doi.org/10.5194/esurf-11-1199-2023, https://doi.org/10.5194/esurf-11-1199-2023, 2023
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Predicting river morphology evolution is very complicated, especially for mountain rivers with complex morphologies such as the Lac des Gaves reach in France. A 2D hydromorphological model was developed to reproduce the channel's evolution and provide reliable volumetric predictions while revealing the challenge of choosing adapted sediment transport and friction laws. Our model can provide decision-makers with reliable predictions to design suitable restoration measures for this reach.
Daisuke Harada and Shinji Egashira
Earth Surf. Dynam., 11, 1183–1197, https://doi.org/10.5194/esurf-11-1183-2023, https://doi.org/10.5194/esurf-11-1183-2023, 2023
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This paper proposes a method for describing large-wood behavior in terms of the convection equation and the storage equation, which are associated with active sediment erosion and deposition. Compared to the existing Lagrangian method, the proposed method can easily simulate the behavior of large wood in the flow field with active sediment transport. The method is applied to the flood disaster in the Akatani River in 2017, and the 2-D flood flow computations are successfully performed.
Hemanti Sharma and Todd A. Ehlers
Earth Surf. Dynam., 11, 1161–1181, https://doi.org/10.5194/esurf-11-1161-2023, https://doi.org/10.5194/esurf-11-1161-2023, 2023
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Seasonality in precipitation (P) and vegetation (V) influences catchment erosion (E), although which factor plays the dominant role is unclear. In this study, we performed a sensitivity analysis of E to P–V seasonality through numerical modeling. Our results suggest that P variations strongly influence seasonal variations in E, while the effect of seasonal V variations is secondary but significant. This is more pronounced in moderate and least pronounced in extreme environmental settings.
Eduardo Gomez-de la Peña, Giovanni Coco, Colin Whittaker, and Jennifer Montaño
Earth Surf. Dynam., 11, 1145–1160, https://doi.org/10.5194/esurf-11-1145-2023, https://doi.org/10.5194/esurf-11-1145-2023, 2023
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Predicting how shorelines change over time is a major challenge in coastal research. We here have turned to deep learning (DL), a data-driven modelling approach, to predict the movement of shorelines using observations from a camera system in New Zealand. The DL models here implemented succeeded in capturing the variability and distribution of the observed shoreline data. Overall, these findings indicate that DL has the potential to enhance the accuracy of current shoreline change predictions.
Christoph Rettinger, Mina Tabesh, Ulrich Rüde, Stefan Vollmer, and Roy M. Frings
Earth Surf. Dynam., 11, 1097–1115, https://doi.org/10.5194/esurf-11-1097-2023, https://doi.org/10.5194/esurf-11-1097-2023, 2023
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Packing models promise efficient and accurate porosity predictions of fluvial sediment deposits. In this study, three packing models were reviewed, calibrated, and validated. Only two of the models were able to handle the continuous and large grain size distributions typically encountered in rivers. We showed that an extension by a cohesion model is necessary and developed guidelines for successful predictions in different rivers.
Alexander A. Ermilov, Gergely Benkő, and Sándor Baranya
Earth Surf. Dynam., 11, 1061–1095, https://doi.org/10.5194/esurf-11-1061-2023, https://doi.org/10.5194/esurf-11-1061-2023, 2023
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A novel, artificial-intelligence-based riverbed sediment analysis methodology is introduced that uses underwater images to identify the characteristic sediment classes. The main novelties of the procedure are as follows: underwater images are used, the method enables continuous mapping of the riverbed along the measurement vessel’s route contrary to conventional techniques, the method is cost-efficient, and the method works without scaling.
Kelly M. Sanks, John B. Shaw, Samuel M. Zapp, José Silvestre, Ripul Dutt, and Kyle M. Straub
Earth Surf. Dynam., 11, 1035–1060, https://doi.org/10.5194/esurf-11-1035-2023, https://doi.org/10.5194/esurf-11-1035-2023, 2023
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River deltas encompass many depositional environments (like channels and wetlands) that interact to produce coastal environments that change through time. The processes leading to sedimentation in wetlands are often neglected from physical delta models. We show that wetland sedimentation constrains flow to the channels, changes sedimentation rates, and produces channels more akin to field-scale deltas. These results have implications for the management of these vulnerable coastal landscapes.
Katharina Wetterauer and Dirk Scherler
Earth Surf. Dynam., 11, 1013–1033, https://doi.org/10.5194/esurf-11-1013-2023, https://doi.org/10.5194/esurf-11-1013-2023, 2023
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In glacial landscapes, debris supply rates vary spatially and temporally. Rockwall erosion rates derived from cosmogenic 10Be concentrations in medial moraine debris at five Swiss glaciers around Pigne d'Arolla indicate an increase in erosion from the end of the Little Ice Age towards deglaciation but temporally more stable rates over the last ∼100 years. Rockwall erosion rates are higher where rockwalls are steep and north-facing, suggesting a potential slope and temperature control.
Sam Anderson, Nicole Gasparini, and Joel Johnson
Earth Surf. Dynam., 11, 995–1011, https://doi.org/10.5194/esurf-11-995-2023, https://doi.org/10.5194/esurf-11-995-2023, 2023
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We measured rock strength and amount of fracturing in the two different rock types, sandstones and carbonates, in Last Chance Canyon, New Mexico, USA. Where there is more carbonate bedrock, hills and channels steepen in Last Chance Canyon. This is because the carbonate-type bedrock tends to be more thickly bedded, is less fractured, and is stronger. The carbonate bedrock produces larger boulders than the sandstone bedrock, which can protect the more fractured sandstone bedrock from erosion.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
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Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Koji Ohata, Hajime Naruse, and Norihiro Izumi
Earth Surf. Dynam., 11, 961–977, https://doi.org/10.5194/esurf-11-961-2023, https://doi.org/10.5194/esurf-11-961-2023, 2023
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We investigated the influence of sediment transport modes on the formation of bedforms using theoretical analysis. The results of the theoretical analysis were verified with published data of plane beds obtained by fieldwork and laboratory experiments. We found that suspended sand particles can promote the formation of plane beds on a fine-grained bed, which suggests that the presence of suspended particles suppresses the development of dunes under submarine sediment-laden gravity currents.
Matan Ben-Asher, Florence Magnin, Sebastian Westermann, Josué Bock, Emmanuel Malet, Johan Berthet, Ludovic Ravanel, and Philip Deline
Earth Surf. Dynam., 11, 899–915, https://doi.org/10.5194/esurf-11-899-2023, https://doi.org/10.5194/esurf-11-899-2023, 2023
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Quantitative knowledge of water availability on high mountain rock slopes is very limited. We use a numerical model and field measurements to estimate the water balance at a steep rock wall site. We show that snowmelt is the main source of water at elevations >3600 m and that snowpack hydrology and sublimation are key factors. The new information presented here can be used to improve the understanding of thermal, hydrogeological, and mechanical processes on steep mountain rock slopes.
Jessica Droujko, Srividya Hariharan Sudha, Gabriel Singer, and Peter Molnar
Earth Surf. Dynam., 11, 881–897, https://doi.org/10.5194/esurf-11-881-2023, https://doi.org/10.5194/esurf-11-881-2023, 2023
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We combined data from satellite images with data measured from a kayak in order to understand the propagation of fine sediment in the Vjosa River. We were able to find some storm-activated and some permanent sources of sediment. We also estimated how much fine sediment is carried into the Adriatic Sea by the Vjosa River: approximately 2.5 Mt per year, which matches previous findings. With our work, we hope to show the potential of open-access satellite images.
Kate C. P. Leary, Leah Tevis, and Mark Schmeeckle
Earth Surf. Dynam., 11, 835–847, https://doi.org/10.5194/esurf-11-835-2023, https://doi.org/10.5194/esurf-11-835-2023, 2023
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Despite the importance of bedforms (e.g., ripples, dunes) to sediment transport, the details of sediment transport on a sub-bedform scale are poorly understood. This paper investigates sediment transport in the downstream and cross-stream directions over bedforms with straight crests. We find that the patterns of bedload transport are highly variable on the sub-bedform scale, which is important for our understanding of the evolution of bedforms with complex crest geometries.
Cited articles
Allen, G. H., Barnes, J. B., Pavelsky, T. M., and Kirby, E.: Lithologic and
tectonic controls on bedrock channel form at the northwest Himalayan front:
Bedrock Channel Form, Mohand, India, J. Geophys. Res.-Earth Surf., 118, 1806–1825, https://doi.org/10.1002/jgrf.20113, 2013. a, b
Asahi, K.: Equilibrium-line altitudes of the present and Last Glacial Maximum
in the eastern Nepal Himalayas and their implications for SW monsoon
climate, Quatern. Int., 212, 26–34,
https://doi.org/10.1016/j.quaint.2008.08.004, 2010. a, b
Baynes, E. R. C., Attal, M., Niedermann, S., Kirstein, L. A., Dugmore, A. J.,
and Naylor, M.: Erosion during extreme flood events dominates Holocene canyon
evolution in northeast Iceland, P. Natl. Acad.
Sci., 112, 2355–2360, https://doi.org/10.1073/pnas.1415443112, 2015. a
Bharti, V. and Singh, C.: Evaluation of error in TRMM 3B42V7 precipitation
estimates over the Himalayan region: Evaluation Of Error In TRMM, J. Geophys. Res.-Atmos., 120, 12458–12473, https://doi.org/10.1002/2015JD023779, 2015. a
Bookhagen, B.: High Resolution Spatiotemporal Distribution of Rainfall
Seasonality and Extreme Events Based on a 12-year TRMM Time Series, ucsb [data set],
http://www.geog.ucsb.edu/~bodo/TRMM/index.php (last access: 26 April 2022), 2013. a
Bookhagen, B. and Burbank, D. W.: Topography, relief, and TRMM-derived
rainfall variations along the Himalaya, Geophys. Res. Lett., 33, L08405,
https://doi.org/10.1029/2006GL026037. a
Bookhagen, B. and Burbank, D. W.: Toward a complete Himalayan hydrological
budget: Spatiotemporal distribution of snowmelt and rainfall and their impact
on river discharge, J. Geophys. Res., 115, F03019,
https://doi.org/10.1029/2009JF001426, 2010. a, b
Brozović, N., Burbank, D. W., and Meigs, A. J.: Climatic Limits on Landscape
Development in the Northwestern Himalaya, Science, 276, 571,
https://doi.org/10.1126/science.276.5312.571, 1997. a
Burbank, D. W., Blythe, A. E., Putkonen, J., Pratt-Sitaula, B., Gabet, E.,
Oskin, M., Barros, A., and Ojha, T. P.: Decoupling of erosion and
precipitation in the Himalayas, Nature, 426, 652–655,
https://doi.org/10.1038/nature02187, 2003. a, b
Cenderelli, D. A. and Wohl, E. E.: Flow hydraulics and geomorphic effects of
glacial-lake outburst floods in the Mount Everest region, Nepal, Earth
Surf. Proc. Land., 28, 385–407, https://doi.org/10.1002/esp.448, 2003. a, b
Collins, B. D. and Jibson, R. W.: Assessment of Existing and Potential
Landslide Hazards Resulting from the 25 April 2015 Gorkha, Nepal Earthquake
Sequence, U.S. Geological Survey Open-File Report 2015-1142, 50 p., https://doi.org/10.3133/ofr20151142, 2015. a
Cook, K. L., Turowski, J. M., and Hovius, N.: A demonstration of the importance
of bedload transport for fluvial bedrock erosion and knickpoint propagation:
Bedload Transport And Fluvial Incision, Earth Surf. Proc. Land., 38, 683–695, https://doi.org/10.1002/esp.3313, 2013. a
Croissant, T., Lague, D., Steer, P., and Davy, P.: Rapid post-seismic landslide
evacuation boosted by dynamic river width, Nat. Geosci., 10, 680–684,
https://doi.org/10.1038/ngeo3005, 2017. a
Crosby, B. T. and Whipple, K. X.: Knickpoint initiation and distribution within
fluvial networks: 236 waterfalls in the Waipaoa River, North Island, New
Zealand, Geomorphology, 82, 16–38, https://doi.org/10.1016/j.geomorph.2005.08.023,
2006. a
Crosby, B. T., Whipple, K. X., Gasparini, N. M., and Wobus, C. W.: Formation of
fluvial hanging valleys: Theory and simulation, J. Geophys. Res., 112, F3, https://doi.org/10.1029/2006JF000566, 2007. a, b, c
Cunningham, M. T., Stark, C. P., Kaplan, M. R., and Schaefer, J. M.: Glacial limitation of tropical mountain height, Earth Surf. Dynam., 7, 147–169, https://doi.org/10.5194/esurf-7-147-2019, 2019. a
Dahlquist, M. P. and West, A. J.: Initiation and Runout of Post‐Seismic
Debris Flows: Insights From the 2015 Gorkha Earthquake, Geophys. Res. Lett., 46, 9658–9668, https://doi.org/10.1029/2019GL083548, 2019. a
Dahlquist, M. P. and West, A. J.: Data for: The imprint of erosion by glacial lake outburst floods in the topography of central Himalayan rivers, hydroshare [data set], http://www.hydroshare.org/resource/2883cfeebb3a43f2b9a1b222e2cfff29, last access: 27 June 2022. a
Davis, W. M.: Glacial Erosion in France, Switzerland and Norway, Proc. Boston Soc. Nat. History, 29, 273–321, 1900. a
DiBiase, R. A. and Whipple, K. X.: The influence of erosion thresholds and
runoff variability on the relationships among topography, climate, and
erosion rate, J. Geophys. Res., 116, F4,
https://doi.org/10.1029/2011JF002095, 2011. a, b
Dingle, E. H., Attal, M., and Sinclair, H. D.: Abrasion-set limits on Himalayan
gravel flux, Nature, 544, 471–474, https://doi.org/10.1038/nature22039, 2017. a
Egholm, D. L., Nielsen, S. B., Pedersen, V. K., and Lesemann, J.-E.: Glacial
effects limiting mountain height, Nature, 460, 884–887,
https://doi.org/10.1038/nature08263, 2009. a
Fan, X., Dufresne, A., Siva Subramanian, S., Strom, A., Hermanns, R.,
Tacconi Stefanelli, C., Hewitt, K., Yunus, A. P., Dunning, S., Capra, L.,
Geertsema, M., Miller, B., Casagli, N., Jansen, J. D., and Xu, Q.: The
formation and impact of landslide dams – State of the art, Earth-Sci.
Rev., 203, 103116, https://doi.org/10.1016/j.earscirev.2020.103116, 2020. a
Finnegan, N. J., Roe, G., Montgomery, D. R., and Hallet, B.: Controls on the
channel width of rivers: Implications for modeling fluvial incision of
bedrock, Geology, 33, 229, https://doi.org/10.1130/G21171.1, 2005. a
Finnegan, N. J., Schumer, R., and Finnegan, S.: A signature of transience in
bedrock river incision rates over timescales of 104–107 years, Nature, 505, 391–394, https://doi.org/10.1038/nature12913, 2014. a
Fischer, M., Korup, O., Veh, G., and Walz, A.: Controls of outbursts of moraine-dammed lakes in the greater Himalayan region, The Cryosphere, 15, 4145–4163, https://doi.org/10.5194/tc-15-4145-2021, 2021. a, b
Flint, J. J.: Stream gradient as a function of order, magnitude, and discharge, Water Resour. Res., 10, 969–973, https://doi.org/10.1029/WR010i005p00969, 1974. a, b
Forte, A. M. and Whipple, K. X.: Short communication: The Topographic Analysis Kit (TAK) for TopoToolbox, Earth Surf. Dynam., 7, 87–95, https://doi.org/10.5194/esurf-7-87-2019, 2019. a, b
Gansser, A.: Geology of the Himalayas, ed., Regional Geology Series, John Wiley and Sons Ltd, London, New York, Sydney (tr. Zurich), OCLC 463197816, 1964. a
Gardner, T. W., Jorgensen, D. W., Shuman, C., and Lemieux, R., C.: Geomorphic
and tectonic process rates: Effects of measured time interval, Geology, 15,
259–261, 1987. a
Gerrard, J.: The landslide hazard in the Himalayas: geological control and
human action, Geomorphology, 10, 221–230, 1994. a
Haeberli, W.: Frequency and Characteristics of Glacier Floods in the Swiss
Alps, Ann. Glaciol., 4, 85–90,
https://doi.org/10.3189/S0260305500005280, 1983. a
Hewitt, K.: Catastrophic landslides and their effects on the Upper Indus
streams, Karakoram Himalaya, northern Pakistan, Geomorphology, 26, 47–80,
https://doi.org/10.1016/S0169-555X(98)00051-8, 1998. a
Hilton, R. G. and West, A. J.: Mountains, erosion and the carbon cycle, Nat. Rev. Earth Environ., 1, 284–299, https://doi.org/10.1038/s43017-020-0058-6, 2020. a
Howard, A. D.: A detachment-limited model of drainage basin evolution, Water Resour. Res., 30, 2261–2285, https://doi.org/10.1029/94WR00757, 1994. a, b, c
Huber, M. L., Lupker, M., Gallen, S. F., Christl, M., and Gajurel, A. P.: Timing of exotic, far-traveled boulder emplacement and paleo-outburst flooding in the central Himalayas, Earth Surf. Dynam., 8, 769–787, https://doi.org/10.5194/esurf-8-769-2020, 2020. a, b, c
Jacquet, J., McCoy, S. W., McGrath, D., Nimick, D. A., Fahey, M.,
O'kuinghttons, J., Friesen, B. A., and Leidich, J.: Hydrologic and geomorphic
changes resulting from episodic glacial lake outburst floods: Rio Colonia,
Patagonia, Chile, Geophys. Res. Lett., 44, 854–864,
https://doi.org/10.1002/2016GL071374, 2017. a
Jansen, J. D., Fabel, D., Bishop, P., Xu, S., Schnabel, C., and Codilean,
A. T.: Does decreasing paraglacial sediment supply slow knickpoint retreat?,
Geology, 39, 543–546, https://doi.org/10.1130/G32018.1, 2011. a
Kirby, E. and Whipple, K.: Quantifying differential rock-uplift rates via
stream profile analysis, Geology, 29, 415,
https://doi.org/10.1130/0091-7613(2001)029<0415:QDRURV>2.0.CO;2, 2001. a
Kirchner, J. W., Finkel, R. C., Riebe, C. S., Granger, D. E., Clayton, J. L.,
King, J. G., and Megahan, W. F.: Mountain erosion over 10 yr, 10 k.y., and 10 m.y. time scales, Geology, 29, 591,
https://doi.org/10.1130/0091-7613(2001)029<0591:MEOYKY>2.0.CO;2, 2001. a
Kirchner, N., Greve, R., Stroeven, A. P., and Heyman, J.: Paleoglaciological
reconstructions for the Tibetan Plateau during the last glacial cycle:
evaluating numerical ice sheet simulations driven by GCM-ensembles,
Quaternary Sci. Rev., 30, 248–267,
https://doi.org/10.1016/j.quascirev.2010.11.006, 2011. a, b, c
Korup, O. and Tweed, F.: Ice, moraine, and landslide dams in mountainous
terrain, Quaternary Sci. Rev., 26, 3406–3422,
https://doi.org/10.1016/j.quascirev.2007.10.012, 2007. a
Korup, O., Montgomery, D. R., and Hewitt, K.: Glacier and landslide feedbacks
to topographic relief in the Himalayan syntaxes, Proc. Natl.
Acad. Sci., 107, 5317–5322, https://doi.org/10.1073/pnas.0907531107, 2010. a
Kummerow, C., Barnes, W., Kozu, T., Shiue, J., and Simpson, J.: The Tropical
Rainfall Measuring Mission (TRMM) Sensor Package, J. Atmos. Ocean. Technol., 15, 809–817,
https://doi.org/10.1175/1520-0426(1998)015<0809:TTRMMT>2.0.CO;2, 1998. a
Lague, D., Hovius, N., and Davy, P.: Discharge, discharge variability, and the
bedrock channel profile: Discharge Variability And Channel Profile,
J. Geophys. Res.-Earth Surf., 110, F04006,
https://doi.org/10.1029/2004JF000259, 2005. a
Lang, K. A., Huntington, K. W., and Montgomery, D. R.: Erosion of the Tsangpo
Gorge by megafloods, Eastern Himalaya, Geology, 41, 1003–1006,
https://doi.org/10.1130/G34693.1, 2013. a
Larsen, I. J. and Montgomery, D. R.: Landslide erosion coupled to tectonics and
river incision, Nat. Geosci., 5, 468–473, https://doi.org/10.1038/ngeo1479, 2012. a
Lavé, J. and Avouac, J. P.: Fluvial incision and tectonic uplift across the
Himalayas of central Nepal, J. Geophys. Res., 106, 26561–26591,
https://doi.org/10.1029/2001JB000359, 2001. a, b, c, d
Leopold, L. B. and Maddock, T.: The Hydraulic Geometry of Stream Channels and
Some Physiographic Implications, US Geological Survey Professional Paper
252, p. 57, https://doi.org/10.3133/pp252, 1953. a, b
Lutz, A. F., Immerzeel, W. W., Shrestha, A. B., and Bierkens, M. F. P.:
Consistent increase in High Asia's runoff due to increasing glacier melt and precipitation, Nat. Clim. Change, 4, 587–592, https://doi.org/10.1038/nclimate2237, 2014. a
Ma, N., Szilagyi, J., Zhang, Y., and Liu, W.:
Complementary‐Relationship‐Based Modeling of Terrestrial
Evapotranspiration Across China During 1982–2012: Validations and
Spatiotemporal Analyses, J. Geophys. Res.-Atmos., 124, 4326–4351, https://doi.org/10.1029/2018JD029850, 2019. a
Martens, B., Miralles, D. G., Lievens, H., van der Schalie, R., de Jeu, R. A. M., Fernández-Prieto, D., Beck, H. E., Dorigo, W. A., and Verhoest, N. E. C.: GLEAM v3: satellite-based land evaporation and root-zone soil moisture, Geosci. Model Dev., 10, 1903–1925, https://doi.org/10.5194/gmd-10-1903-2017, 2017. a
Mason, K.: Indus floods and Shyok glaciers, The Himalayan Journal, 1, 10–29,
1929. a
Massey, F. J.: The Kolmogorov-Smirnov Test for Goodness of Fit, J. Am. Stat. Assoc., 46, 68–78, 1951. a
Montgomery, D. R. and Foufoula-Georgiou, E.: Channel network source
representation using digital elevation models, Water Resour. Res., 29,
3925–3934, https://doi.org/10.1029/93WR02463, 1993. a
Montgomery, D. R., Hallet, B., Yuping, L., Finnegan, N., Anders, A., Gillespie,
A., and Greenberg, H. M.: Evidence for Holocene megafloods down the tsangpo
River gorge, Southeastern Tibet, Quaternary Res., 62, 201–207,
https://doi.org/10.1016/j.yqres.2004.06.008, 2004. a
Mool, P. K.: Glacier Lake Outburst Floods in Nepal, J. Nepal Geol. Soc., 11, 273–280, https://doi.org/10.3126/jngs.v11i0.32802, 1995. a
Pickering, J., Diamond, M., Goodbred, S., Grall, C., Martin, J., Palamenghi,
L., Paola, C., Schwenk, T., Sincavage, R., and Spieß, V.: Impact of
glacial-lake paleofloods on valley development since glacial termination
II: A conundrum of hydrology and scale for the lowstand Brahmaputra-Jamuna
paleovalley system, GSA Bulletin, 131, 58–70, https://doi.org/10.1130/B31941.1,
2019. a, b
Prasicek, G., Herman, F., Robl, J., and Braun, J.: Glacial Steady State
Topography Controlled by the Coupled Influence of Tectonics and Climate,
J. Geophys. Res.-Earth Surf., 123, 1344–1362,
https://doi.org/10.1029/2017JF004559, 2018. a
Ray, Y. and Srivastava, P.: Widespread aggradation in the mountainous catchment
of the Alaknanda–Ganga River System: timescales and implications to
Hinterland–foreland relationships, Quaternary Sci. Rev., 29,
2238–2260, https://doi.org/10.1016/j.quascirev.2010.05.023, 2010. a, b
Raymo, M. E. and Ruddiman, W. F.: Tectonic forcing of late Cenozoic climate,
Nature, 359, 117–122, https://doi.org/10.1038/359117a0, 1992. a
Roback, K., Clark, M. K., West, A. J., Zekkos, D., Li, G., Gallen, S. F.,
Chamlagain, D., and Godt, J. W.: The size, distribution, and mobility of
landslides caused by the 2015 M w 7.8 Gorkha earthquake, Nepal,
Geomorphology, 301, 121–138, https://doi.org/10.1016/j.geomorph.2017.01.030, 2018. a, b
Roe, G. H., Montgomery, D. R., and Hallet, B.: Orographic precipitation and the
relief of mountain ranges: Orographic Precipitation And Relief,
J. Geophys. Res.-Solid Earth, 108, B6, https://doi.org/10.1029/2001JB001521, 2003. a
Rosenbloom, N. A. and Anderson, R. S.: Hillslope and channel evolution in a
marine terraced landscape, Santa Cruz, California, J. Geophys. Res., 99,
14013–14029, https://doi.org/10.1029/94JB00048, 1994. a
Ruiz-Villanueva, V., Allen, S., Arora, M., Goel, N. K., and Stoffel, M.: Recent
catastrophic landslide lake outburst floods in the Himalayan mountain range,
Prog. Phys. Geog.-Earth Environ., 41, 3–28,
https://doi.org/10.1177/0309133316658614, 2017. a
Scherler, D., Munack, H., Mey, J., Eugster, P., Wittmann, H., Codilean, A. T.,
Kubik, P., and Strecker, M. R.: Ice dams, outburst floods, and glacial
incision at the western margin of the Tibetan Plateau: A >100 k.y. chronology from the Shyok Valley, Karakoram, Geol. Soc. Am. Bull., 126, 738–758, https://doi.org/10.1130/B30942.1, 2014. a
Schwanghart, W. and Scherler, D.: Short Communication: TopoToolbox 2 – MATLAB-based software for topographic analysis and modeling in Earth surface sciences, Earth Surf. Dynam., 2, 1–7, https://doi.org/10.5194/esurf-2-1-2014, 2014. a, b
Schwanghart, W., Bernhardt, A., Stolle, A., Hoelzmann, P., Adhikari, B. R.,
Andermann, C., Tofelde, S., Merchel, S., Rugel, G., Fort, M., and Korup, O.:
Repeated catastrophic valley infill following medieval earthquakes in the
Nepal Himalaya, Science, 351, 147–150, https://doi.org/10.1126/science.aac9865, 2016. a, b
Schwanghart, W., Molkenthin, C., and Scherler, D.: A systematic approach and
software for the analysis of point patterns on river networks, Earth Surf.
Proc. Land., 46, 1847–1862, https://doi.org/10.1002/esp.5127, 2021. a, b
Shields, A.: Application of similarity principles and turbulence research to
bed-load movement, CalTech library, Soil Conservation Service Cooperative
Laboratory, 25992, https://resolver.caltech.edu/CaltechKHR:HydroLabpub167 (last access: 11 July 2022), 1936. a
Sklar, L. S. and Dietrich, W. E.: Sediment and rock strength controls on river
incision into bedrock, Geology, 29, 1087,
https://doi.org/10.1130/0091-7613(2001)029<1087:SARSCO>2.0.CO;2, 2001. a, b
Sklar, L. S. and Dietrich, W. E.: The role of sediment in controlling
steady-state bedrock channel slope: Implications of the saltation–abrasion
incision model, Geomorphology, 82, 58–83,
https://doi.org/10.1016/j.geomorph.2005.08.019, 2006. a
Snyder, N. P., Whipple, K. X., Tucker, G. E., and Merritts, D. J.: Importance
of a stochastic distribution of floods and erosion thresholds in the bedrock
river incision problem: Floods And Thresholds In River Incision,
J. Geophys. Res.: Solid Earth, 108, B2, https://doi.org/10.1029/2001JB001655, 2003. a
Spearman, C.: The Proof and Measurement of Association between Two Things, The American Journal of Psychology, 100, 441–471, 1987. a
Steer, P., Simoes, M., Cattin, R., and Shyu, J. B. H.: Erosion influences the
seismicity of active thrust faults, Nat. Commun., 5, 5564,
https://doi.org/10.1038/ncomms6564, 2014. a
Sternberg, H.: Untersuchungen über längen- und Querprofil geschiebeführender
Flüsse, Zeitschrift für Bauwesen, 25, 486–506, 1875. a
Thomson, S. N., Brandon, M. T., Tomkin, J. H., Reiners, P. W., Vásquez, C.,
and Wilson, N. J.: Glaciation as a destructive and constructive control on
mountain building, Nature, 467, 313–317, https://doi.org/10.1038/nature09365, 2010. a
Turowski, J. M., Yager, E. M., Badoux, A., Rickenmann, D., and Molnar, P.: The
impact of exceptional events on erosion, bedload transport and channel
stability in a step-pool channel, Earth Surf. Proc. Land., 34,
1661–1673, https://doi.org/10.1002/esp.1855, 2009. a
Veh, G., Korup, O., von Specht, S., Roessner, S., and Walz, A.: Unchanged
frequency of moraine-dammed glacial lake outburst floods in the Himalaya,
Nat. Clim. Change, 9, 379–383, https://doi.org/10.1038/s41558-019-0437-5, 2019. a
Veh, G., Korup, O., and Walz, A.: Hazard from Himalayan glacier lake outburst
floods, P. Natl. Acad. Sci., 117, 907–912,
https://doi.org/10.1073/pnas.1914898117, 2020. a
West, A. J., Arnold, M., AumaÎtre, G., Bourlès, D. L., Keddadouche, K., Bickle, M., and Ojha, T.: High natural erosion rates are the backdrop for present-day soil erosion in the agricultural Middle Hills of Nepal, Earth Surf. Dynam., 3, 363–387, https://doi.org/10.5194/esurf-3-363-2015, 2015. a, b
Whittaker, A. C.: How do landscapes record tectonics and climate?, Lithosphere,
4, 160–164, https://doi.org/10.1130/RF.L003.1, 2012. a
Willett, S. D. and Brandon, M. T.: On steady states in mountain belts, Geology,
30, 175, https://doi.org/10.1130/0091-7613(2002)030<0175:OSSIMB>2.0.CO;2, 2002. a
Wilson, A., Hovius, N., and Turowski, J. M.: Upstream-facing convex surfaces:
Bedrock bedforms produced by fluvial bedload abrasion, Geomorphology,
180–181, 187–204, https://doi.org/10.1016/j.geomorph.2012.10.010, 2013. a
Wobus, C., Whipple, K. X., Kirby, E., Snyder, N., Johnson, J., Spyropolou, K.,
Crosby, B., and Sheehan, D.: Tectonics from topography: Procedures, promise,
and pitfalls, in: Special Paper 398: Tectonics, Climate, and Landscape
Evolution, Geol. Soc. Am., 398, 55–74,
https://doi.org/10.1130/2006.2398(04), 2006a. a, b
Wobus, C. W., Crosby, B. T., and Whipple, K. X.: Hanging valleys in fluvial
systems: Controls on occurrence and implications for landscape evolution, J. Geophys. Res.-Earth Surf., 111, F02017, https://doi.org/10.1029/2005JF000406, 2006b. a, b
Wobus, C. W., Whipple, K. X., and Hodges, K. V.: Neotectonics of the central
Nepalese Himalaya: Constraints from geomorphology, detrital 40
Ar/ 39 Ar thermochronology, and thermal modeling:
Neotectonics Of Central Nepal, Tectonics, 25, 4, https://doi.org/10.1029/2005TC001935, 2006c. a
Xu, D.: Characteristics of debris flow caused by outburst of glacial lake in
Boqu river, Xizang, China, 1981, GeoJournal, 17, 569–580, https://doi.org/10.1007/BF00209443, 1988. a
Yanites, B. J.: The Dynamics of Channel Slope, Width, and Sediment in Actively
Eroding Bedrock River Systems, J. Geophys. Res.-Earth
Surf., 123, 1504–1527, https://doi.org/10.1029/2017JF004405, 2018. a
Yanites, B. J., Mitchell, N. A., Bregy, J. C., Carlson, G. A., Cataldo, K.,
Holahan, M., Johnston, G. H., Nelson, A., Valenza, J., and Wanker, M.:
Landslides control the spatial and temporal variation of channel width in
southern Taiwan: Implications for landscape evolution and cascading hazards
in steep, tectonically active landscapes: Variation in channel morphology
controlled by landslides in s. Taiwan, Earth Surf. Proc. Land.,
43, 1782–1797, https://doi.org/10.1002/esp.4353, 2018. a
Short summary
Himalayan rivers are full of giant boulders that rarely move except during glacial lake outburst floods (GLOFs), which therefore must be important drivers of erosion in the Himalayas. GLOFs are rare, so little is known about their long-term erosional impact. We found that rivers in Nepal have channel geometry that, compared with markers of upstream glaciation, confirm GLOFs as a major control on erosion. This previously unrecognized control should be accounted for in landscape evolution studies.
Himalayan rivers are full of giant boulders that rarely move except during glacial lake outburst...
