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Earth Surface Dynamics
An interactive open-access journal of the European Geosciences Union
Journal topic
- About
- Editorial board
- Articles
- Special issues
- Highlight articles
- Manuscript tracking
- Subscribe to alerts
- Peer review
- For authors
- For reviewers
- EGU publications
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IF 3.928
3.864CiteScore
6.2SNIP 1.469
SJR 1.666
index 21h5-index 23
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Abstracted/indexed
ESurf | Articles | Volume 7, issue 1
Earth Surf. Dynam., 7, 147–169, 2019
https://doi.org/10.5194/esurf-7-147-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-7-147-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Earth Surf. Dynam., 7, 147–169, 2019
https://doi.org/10.5194/esurf-7-147-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-7-147-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article 31 Jan 2019
Research article | 31 Jan 2019
Glacial limitation of tropical mountain height
Maxwell T. Cunningham et al.
Related authors
No articles found.
Roberto Fernández, Gary Parker, and Colin P. Stark
Earth Surf. Dynam., 7, 949–968, https://doi.org/10.5194/esurf-7-949-2019, https://doi.org/10.5194/esurf-7-949-2019, 2019
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This paper describes the case of a meandering bedrock river with loose sediment on the bed. In such rivers, the sediment hits and erodes the bed as it moves with the flow. We did experiments in a laboratory flume to identify the areas where the sediment moves and those where it deposits. We discovered that the size and location of those areas change with the amount of sediment in the channel and its curvature. The fluctuations of sediment cover over the bed drive the erosion potential.
Joshua M. Maurer, Summer B. Rupper, and Joerg M. Schaefer
The Cryosphere, 10, 2203–2215, https://doi.org/10.5194/tc-10-2203-2016, https://doi.org/10.5194/tc-10-2203-2016, 2016
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Here we utilize declassified spy satellite imagery to quantify ice volume loss of glaciers in the eastern Himalayas over approximately the last three decades. Clean-ice and debris-covered glaciers show similar magnitudes of ice loss, while calving glaciers are contributing a disproportionately large amount to total ice loss. Results highlight important physical processes affecting the ice mass budget and associated water resources in the Himalayas.
Shaun R. Eaves, Andrew N. Mackintosh, Brian M. Anderson, Alice M. Doughty, Dougal B. Townsend, Chris E. Conway, Gisela Winckler, Joerg M. Schaefer, Graham S. Leonard, and Andrew T. Calvert
Clim. Past, 12, 943–960, https://doi.org/10.5194/cp-12-943-2016, https://doi.org/10.5194/cp-12-943-2016, 2016
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Geological evidence for past changes in glacier length provides a useful source of information about pre-historic climate change. We have used glacier modelling to show that air temperature reductions of −5 to −7 °C, relative to present, are required to simulate the glacial extent in the North Island, New Zealand, during the last ice age (approx. 20000 years ago). Our results provide data to assess climate model simulations, with the aim of determining the drivers of past natural climate change.
C. Hibert, C. P. Stark, and G. Ekström
Nat. Hazards Earth Syst. Sci., 15, 1265–1273, https://doi.org/10.5194/nhess-15-1265-2015, https://doi.org/10.5194/nhess-15-1265-2015, 2015
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We carry out a study of the seismic signals generated by the devastating Oso-Steelhead landslides. We invert the long-period seismic signals generated by the first main event and obtain estimates of its trajectory, kinematics and mass. No distinct long-period surface waves were recorded for the second failure, which prevents inversion for its source parameters. However, from the comparison of the energy of the short-period waves generated by both events, we can estimate the volume of the second.
L. Zhang, G. Parker, C. P. Stark, T. Inoue, E. Viparelli, X. Fu, and N. Izumi
Earth Surf. Dynam., 3, 113–138, https://doi.org/10.5194/esurf-3-113-2015, https://doi.org/10.5194/esurf-3-113-2015, 2015
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The saltation-abrasion model captures bedrock incision due stones striking bedrock. We present the Macro-Roughness-based Saltation-Abrasion-Alluviation (MRSAA) model, which tracks spatiotemporal variation of both bedload and alluvial thickness. It captures migrating waves of incision upstream and alluviation downstream. We apply it to incision problems not captured by saltation-abrasion, including the response to alluviation and stripping, and a simplified graben with uplift and subsidence.
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
Parameterization of river incision models requires accounting for environmental heterogeneity: insights from the tropical Andes
Measuring river planform changes from remotely sensed data – a Monte Carlo approach to assessing the impact of spatially variable error
Entrainment and suspension of sand and gravel
Morphological evolution of bifurcations in tide-influenced deltas
Short communication: Landlab v2.0: a software package for Earth surface dynamics
Storm-induced sediment supply to coastal dunes on sand flats
Emerging crescentic patterns in modelled double sandbar systems under normally incident waves
Experimental evidence for bifurcation angles control on abandoned channel fill geometry
Large wood as a confounding factor in interpreting the width of spring-fed streams
River patterns reveal two stages of landscape evolution at an oblique convergent margin, Marlborough Fault System, New Zealand
Estimating sand bed load in rivers by tracking dunes: a comparison of methods based on bed elevation time series
Mass balance, grade, and adjustment timescales in bedrock channels
Determining flow directions in river channel networks using planform morphology and topology
Mātauranga Māori in geomorphology: existing frameworks, case studies and recommendations for Earth scientists
Stabilising large grains in self-forming steep channels
Dynamic allometry in coastal overwash morphology
Potential links between Baltic Sea submarine terraces and groundwater seeping
The impact of earthquakes on orogen-scale exhumation
Estimating the disequilibrium in denudation rates due to divide migration at the scale of river basins
Modelling impacts of spatially variable erosion drivers on suspended sediment dynamics
Permafrost distribution in steep rock slopes in Norway: measurements, statistical modelling and implications for geomorphological processes
Reconstruction of river valley evolution before and after the emplacement of the giant Seymareh rock avalanche (Zagros Mts., Iran)
Experiments on patterns of alluvial cover and bedrock erosion in a meandering channel
How does the downstream boundary affect avulsion dynamics in a laboratory bifurcation?
River channel width controls blocking by slow-moving landslides in California's Franciscan mélange
Introducing PebbleCounts: a grain-sizing tool for photo surveys of dynamic gravel-bed rivers
Quantifying the restoration success of wood introductions to increase coho salmon winter habitat
Seismic and geologic controls on spatial clustering of landslides in three large earthquakes
Evaluating the potential of post-processing kinematic (PPK) georeferencing for UAV-based structure- from-motion (SfM) photogrammetry and surface change detection
Percentile-based grain size distribution analysis tools (GSDtools) – estimating confidence limits and hypothesis tests for comparing two samples
A global delta dataset and the environmental variables that predict delta formation on marine coastlines
Displacement mechanisms of slow-moving landslides in response to changes in porewater pressure and dynamic stress
Quantifying sediment mass redistribution from joint time-lapse gravimetry and photogrammetry surveys
Evaluating post-glacial bedrock erosion and surface exposure duration by coupling in situ optically stimulated luminescence and 10Be dating
Alluvial channel response to environmental perturbations: fill-terrace formation and sediment-signal disruption
A coupled soilscape–landform evolution model: model formulation and initial results
Spatial and temporal patterns of sediment storage and erosion following a wildfire and extreme flood
An index concentration method for suspended load monitoring in large rivers of the Amazonian foreland
Testing a failure surface prediction and deposit reconstruction method for a landslide cluster that occurred during Typhoon Talas (Japan)
Sediment supply from lateral moraines to a debris-covered glacier in the Himalaya
Potential erosion capacity of gravity currents created by changing initial conditions
Modelling braided river morphodynamics using a particle travel length framework
Observations and scaling of tidal mass transport across the lower Ganges–Brahmaputra delta plain: implications for delta management and sustainability
Long-term erosion of the Nepal Himalayas by bedrock landsliding: the role of monsoons, earthquakes and giant landslides
Short communication: Challenges and applications of structure-from-motion photogrammetry in a physical model of a braided river
Short communication: The Topographic Analysis Kit (TAK) for TopoToolbox
Environmental signal shredding on sandy coastlines
Long-profile evolution of transport-limited gravel-bed rivers
The rarefied (non-continuum) conditions of tracer particle transport in soils, with implications for assessing the intensity and depth dependence of mixing from geochronology
Measuring subaqueous progradation of the Wax Lake Delta with a model of flow direction divergence
Benjamin Campforts, Veerle Vanacker, Frédéric Herman, Matthias Vanmaercke, Wolfgang Schwanghart, Gustavo E. Tenorio, Patrick Willems, and Gerard Govers
Earth Surf. Dynam., 8, 447–470, https://doi.org/10.5194/esurf-8-447-2020, https://doi.org/10.5194/esurf-8-447-2020, 2020
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In this contribution, we explore the spatial determinants of bedrock river incision in the tropical Andes. The model results illustrate the problem of confounding between climatic and lithological variables, such as rock strength. Incorporating rock strength explicitly into river incision models strongly improves the explanatory power of all tested models and enables us to clarify the role of rainfall variability in controlling river incision rates.
Timothée Jautzy, Pierre-Alexis Herrault, Valentin Chardon, Laurent Schmitt, and Gilles Rixhon
Earth Surf. Dynam., 8, 471–484, https://doi.org/10.5194/esurf-8-471-2020, https://doi.org/10.5194/esurf-8-471-2020, 2020
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Remote sensing is widely used to document historical fluvial dynamics. However, the geometric error affecting the inferred planform changes can result in undesired geomorphological misinterpretation. Here, we present a novel approach to quantify the uncertainty associated with eroded/deposited surfaces. Concluding that this uncertainty depends on the magnitude and the shape of the surficial changes, restoration programs targeting lateral mobility of streams can benefit from our approach.
Jan de Leeuw, Michael P. Lamb, Gary Parker, Andrew J. Moodie, Daniel Haught, Jeremy G. Venditti, and Jeffrey A. Nittrouer
Earth Surf. Dynam., 8, 485–504, https://doi.org/10.5194/esurf-8-485-2020, https://doi.org/10.5194/esurf-8-485-2020, 2020
Arya P. Iwantoro, Maarten van der Vegt, and Maarten G. Kleinhans
Earth Surf. Dynam., 8, 413–429, https://doi.org/10.5194/esurf-8-413-2020, https://doi.org/10.5194/esurf-8-413-2020, 2020
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We investigated the effect of tides on the morphodynamic evolution of bifurcations in tide-influenced deltas. Using results from a numerical morphodynamic model (Delft3D), we found that tides cause less asymmetric bifurcations and thereby keep both downstream channels open. Our results explain why avulsion rarely occurs in tide-influenced deltas, whereas it occurs more often in river-dominated deltas.
Katherine R. Barnhart, Eric W. H. Hutton, Gregory E. Tucker, Nicole M. Gasparini, Erkan Istanbulluoglu, Daniel E. J. Hobley, Nathan J. Lyons, Margaux Mouchene, Sai Siddhartha Nudurupati, Jordan M. Adams, and Christina Bandaragoda
Earth Surf. Dynam., 8, 379–397, https://doi.org/10.5194/esurf-8-379-2020, https://doi.org/10.5194/esurf-8-379-2020, 2020
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Landlab is a Python package to support the creation of numerical models in Earth surface dynamics. Since the release of the 1.0 version in 2017, Landlab has grown and evolved: it contains 31 new process components, a refactored model grid, and additional utilities. This contribution describes the new elements of Landlab, discusses why certain backward-compatiblity-breaking changes were made, and reflects on the process of community open-source software development.
Filipe Galiforni-Silva, Kathelijne M. Wijnberg, and Suzanne J. M. H. Hulscher
Earth Surf. Dynam., 8, 335–350, https://doi.org/10.5194/esurf-8-335-2020, https://doi.org/10.5194/esurf-8-335-2020, 2020
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Storm surges are often related to coastal dune erosion. We found that, for specific coastal settings, storm surges may enhance dune growth rather than only undermine it. Using a computer model and elevation data, we noticed that storm surges could deposit sand onto the sand flat from sand previously deposited closer to the sea. As they move to areas farther from the sea, it becomes easier for the wind to move this sand to the dunes. These findings may help coastal managers and policymakers.
Giovanni Coco, Daniel Calvete, Francesca Ribas, Huib E. de Swart, and Albert Falqués
Earth Surf. Dynam., 8, 323–334, https://doi.org/10.5194/esurf-8-323-2020, https://doi.org/10.5194/esurf-8-323-2020, 2020
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Sandbars are ubiquitous features of the surf zone. They are rarely straight and often develop crescentic shapes. Double sandbar systems are also common, but the possibility of feedback between inner and outer sandbars has not been fully explored. The presence of double sandbar systems affects wave transformation and can result in a variety of spatial patterns. Here we model the conditions, waves and initial bathymetry that lead to the emergence of different patterns.
Léo Szewczyk, Jean-Louis Grimaud, and Isabelle Cojan
Earth Surf. Dynam., 8, 275–288, https://doi.org/10.5194/esurf-8-275-2020, https://doi.org/10.5194/esurf-8-275-2020, 2020
Dana Ariel Lapides and Michael Manga
Earth Surf. Dynam., 8, 195–210, https://doi.org/10.5194/esurf-8-195-2020, https://doi.org/10.5194/esurf-8-195-2020, 2020
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Spring-fed streams throughout volcanic regions of the western United States are wider than runoff-fed streams with similar flow levels. We used high-resolution satellite imagery in combination with flow and climate data to examine the relationship between wood loading and stream width in 38 spring-fed and 20 runoff-fed streams. This study identifies distinct wood dynamics in spring-fed and runoff-fed streams and a strong correlation between stream width and wood length in spring-fed streams.
Alison R. Duvall, Sarah A. Harbert, Phaedra Upton, Gregory E. Tucker, Rebecca M. Flowers, and Camille Collett
Earth Surf. Dynam., 8, 177–194, https://doi.org/10.5194/esurf-8-177-2020, https://doi.org/10.5194/esurf-8-177-2020, 2020
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In this study, we examine river patterns and the evolution of the landscape within the Marlborough Fault System, South Island, New Zealand, where the Australian and Pacific tectonic plates collide. We find that faulting, uplift, river capture and the long-lived nature of the drainage network all dictate river patterns at this site. Based on these results and a wealth of previous geologic studies, we propose two broad stages of landscape evolution over the last 25 million years of orogenesis.
Kate C. P. Leary and Daniel Buscombe
Earth Surf. Dynam., 8, 161–172, https://doi.org/10.5194/esurf-8-161-2020, https://doi.org/10.5194/esurf-8-161-2020, 2020
Jens Martin Turowski
Earth Surf. Dynam., 8, 103–122, https://doi.org/10.5194/esurf-8-103-2020, https://doi.org/10.5194/esurf-8-103-2020, 2020
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Bedrock channels are the conveyor belts of mountain regions, evacuating sediment produced by erosion. Bedrock channel morphology and dynamics affect sediment transport rates and local erosion and set the base level for hillslope response. Here, using mechanistic considerations of the processes of fluvial erosion and transport, and considerations of the mass balance of sediment and bedrock, I discuss the principles governing steady-state channel morphology and the dynamic paths to achieve it.
Jon Schwenk, Anastasia Piliouras, and Joel C. Rowland
Earth Surf. Dynam., 8, 87–102, https://doi.org/10.5194/esurf-8-87-2020, https://doi.org/10.5194/esurf-8-87-2020, 2020
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Standing on a riverbank, it is usually obvious which direction the river flows. However, when observing a river from space, we cannot see the flowing water and must use other clues to determine flow directions. For complicated river channel networks like those of deltas and braided rivers, determining the flow direction of each channel within the network is not trivial. We present and demonstrate a method to automatically determine flow directions for each link in aerially viewed river channels.
Clare Wilkinson, Dan C. H. Hikuroa, Angus H. Macfarlane, and Matthew W. Hughes
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-5, https://doi.org/10.5194/esurf-2020-5, 2020
Revised manuscript accepted for ESurf
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This review highlights potential contributions that Indigenous knowledge can make to geomorphic research. We evaluate several frameworks and models for including Indigenous knowledge in geomorphic research and discuss how they can be adapted for use with Indigenous communities across the world. We propose that weaving Indigenous knowledge with geomorphic science has the potential to create new solutions and understandings that neither body of knowledge could produce in isolation.
William H. Booker and Brett C. Eaton
Earth Surf. Dynam., 8, 51–67, https://doi.org/10.5194/esurf-8-51-2020, https://doi.org/10.5194/esurf-8-51-2020, 2020
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Using experiments, we found that the form and behaviour of a river depends on its ability to move the larger of its constituents. The manner in which all particles move depends upon the rate and calibre of the supplied material, as well as the rate of supplied water. This goes against the prevailing theory of a single important and representative grain size under depositing conditions, and these results may alter how we interpret river deposits to explain their formation.
Eli D. Lazarus, Kirstin L. Davenport, and Ana Matias
Earth Surf. Dynam., 8, 37–50, https://doi.org/10.5194/esurf-8-37-2020, https://doi.org/10.5194/esurf-8-37-2020, 2020
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Scaling relationships mathematically describe how two geometric traits of a geomorphic feature change relative to each other in a systematic way (how length changes with area in drainage basins and sedimentary deposits, for example). Here we demonstrate the emergence of scaling relationships in coastal overwash morphology. These findings may help to predict overwash deposition and offer insight into how spatial patterns in overwash morphology may self-organise.
Martin Jakobsson, Matt O'Regan, Carl-Magnus Mörth, Christian Stranne, Elizabeth Weidner, Jim Hansson, Richard Gyllencreutz, Christoph Humborg, Tina Elfwing, Alf Norkko, Joanna Norkko, Björn Nilsson, and Arne Sjöström
Earth Surf. Dynam., 8, 1–15, https://doi.org/10.5194/esurf-8-1-2020, https://doi.org/10.5194/esurf-8-1-2020, 2020
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We studied coastal sea floor terraces in parts of the Baltic Sea using various types of sonar data, sediment cores, and video. Terraces (~1 m high, > 100 m long) are widespread in depths < 15 m and are formed in glacial clay. Our study supports an origin from groundwater flow through silty layers, undermining overlying layers when discharged at the sea floor. Submarine groundwater discharge like this may be a significant source of freshwater to the Baltic Sea that needs to be studied further.
Oliver R. Francis, Tristram C. Hales, Daniel E. J. Hobley, Xuanmei Fan, Alexander J. Horton, Gianvito Scaringi, and Runqiu Huang
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2019-64, https://doi.org/10.5194/esurf-2019-64, 2019
Revised manuscript accepted for ESurf
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Earthquakes can be responsible for up to half of the long-term erosion in a mountain range. However, singular events are hard to identify in geological records and landscapes. We use a numerical model of a tectonically active landscape to demonstrate that mixing of regolith within orogens reduces the time scale of the earthquake's perturbation of cosmogenic nuclide concentrations, resulting in them potentially being unrecorded potentially due to the low temporal resolution of exhumation records.
Timothée Sassolas-Serrayet, Rodolphe Cattin, Matthieu Ferry, Vincent Godard, and Martine Simoes
Earth Surf. Dynam., 7, 1041–1057, https://doi.org/10.5194/esurf-7-1041-2019, https://doi.org/10.5194/esurf-7-1041-2019, 2019
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The topographic steady-state assumption is often used in geomorphology. However, recent studies suggest that a drainage network is more mobile than previously thought. Using landscape evolution models, we show that those migrations have a significant impact on basin-wide denudation rates even if an overall topographic steady state is achieved at large scale. Our approach provides new tools to derive minimal uncertainties in basin-scale denudation rates due to this topographic disequilibrium.
Giulia Battista, Peter Molnar, and Paolo Burlando
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2019-59, https://doi.org/10.5194/esurf-2019-59, 2019
Revised manuscript accepted for ESurf
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Estimating suspended sediment load in rivers is complex due to the variability in the observed concentrations. We present a model for soil erosion and sediment transport in river basins that accounts for the main sources of this variability and can capture the scatter of the rating curve in a pre-alpine basin. We found that sediment load depends on the variability in space of erosion drivers, as this affects erosion rates and the location and connectivity to the channel of the erosion areas.
Florence Magnin, Bernd Etzelmüller, Sebastian Westermann, Ketil Isaksen, Paula Hilger, and Reginald L. Hermanns
Earth Surf. Dynam., 7, 1019–1040, https://doi.org/10.5194/esurf-7-1019-2019, https://doi.org/10.5194/esurf-7-1019-2019, 2019
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This study proposes the first permafrost (i.e. ground with temperature permanently < 0 °C) map covering the steep rock slopes of Norway. It was created by using rock temperature data collected at the near surface of 25 rock walls spread across the country between 2010 and 2018. The map shows that permafrost mostly exists above 1300–1400 m a.s.l. in southern Norway and close to sea level in northern Norway. The results have strong potential for the study of rock wall sliding and failure.
Michele Delchiaro, Marta Della Seta, Salvatore Martino, Maryam Dehbozorgi, and Reza Nozaem
Earth Surf. Dynam., 7, 929–947, https://doi.org/10.5194/esurf-7-929-2019, https://doi.org/10.5194/esurf-7-929-2019, 2019
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This study provides insights into the causes and effects of the largest landslide and related damming that occurred on the emerged Earth surface. Understanding the hazard conditions is important for refining risk mitigation strategies for extreme landslide scenarios. We mapped and dated lacustrine and fluvial terrace sediments constraining the evolutionary model of the valley, thus providing the basis for future studies on the possible seismic trigger for such an extreme case study.
Roberto Fernández, Gary Parker, and Colin P. Stark
Earth Surf. Dynam., 7, 949–968, https://doi.org/10.5194/esurf-7-949-2019, https://doi.org/10.5194/esurf-7-949-2019, 2019
Short summary
Short summary
This paper describes the case of a meandering bedrock river with loose sediment on the bed. In such rivers, the sediment hits and erodes the bed as it moves with the flow. We did experiments in a laboratory flume to identify the areas where the sediment moves and those where it deposits. We discovered that the size and location of those areas change with the amount of sediment in the channel and its curvature. The fluctuations of sediment cover over the bed drive the erosion potential.
Gerard Salter, Vaughan R. Voller, and Chris Paola
Earth Surf. Dynam., 7, 911–927, https://doi.org/10.5194/esurf-7-911-2019, https://doi.org/10.5194/esurf-7-911-2019, 2019
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Bifurcations are the switches that steer water and sediment in delta and multithread river networks, playing an important role in shaping the landscape. In lab experiments, we found that when the downstream branches grow through time, frequent switching in the water and sediment partitioning occurs. In contrast, once sediment freely exits the downstream boundary, long periods of time when one branch dominates occur; however, unlike our theoretical prediction, these are not permanent.
Noah J. Finnegan, Kiara N. Broudy, Alexander L. Nereson, Joshua J. Roering, Alexander L. Handwerger, and Georgina Bennett
Earth Surf. Dynam., 7, 879–894, https://doi.org/10.5194/esurf-7-879-2019, https://doi.org/10.5194/esurf-7-879-2019, 2019
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In some settings, landslides trigger valley blockages that impound huge volumes of sediment, often drastically changing river habitat and habitability. In other settings, landslides appear to have little effect on rivers. In this study, we explore what governs the different sensitivity of rivers to blocking from landslide debris. We accomplish this by comparing two sites in California with dramatic differences in blocking from otherwise similar slow-moving landslides.
Benjamin Purinton and Bodo Bookhagen
Earth Surf. Dynam., 7, 859–877, https://doi.org/10.5194/esurf-7-859-2019, https://doi.org/10.5194/esurf-7-859-2019, 2019
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We develop and test new methods for counting pebble-size distributions in photos of gravel-bed rivers. Our open-source algorithms provide good estimates in complex imagery from high-energy mountain rivers. We discuss methods of river cross-section photo collection and processing into seamless georeferenced imagery. Application of a semi-automated version of the algorithm in small patches can be used as validation data for upscaling to entire survey sites using a fully automated version.
Russell T. Bair, Catalina Segura, and Christopher M. Lorion
Earth Surf. Dynam., 7, 841–857, https://doi.org/10.5194/esurf-7-841-2019, https://doi.org/10.5194/esurf-7-841-2019, 2019
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Large wood (LW) pieces are often part of fish habitat restoration projects. We investigated reach-scale changes after the addition of LW that are relevant to juvenile coho salmon. A survivable habitat for juvenile coho was characterized in terms of critical swim speed and bed stability. Model predictions showed that survivable habitat increased by 86–128 % in terms of flow velocity and bed stability. Our findings are applicable to stream restoration efforts throughout the Pacific Northwest.
Claire Rault, Alexandra Robert, Odin Marc, Niels Hovius, and Patrick Meunier
Earth Surf. Dynam., 7, 829–839, https://doi.org/10.5194/esurf-7-829-2019, https://doi.org/10.5194/esurf-7-829-2019, 2019
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Large earthquakes trigger thousands of landslides in the area of their epicentre. For three earthquake cases, we have determined the position of these landslides along hillslopes. These co-seismic landslides tend to cluster at ridge crests and slope toes. We show that crest clustering is specific to seismic triggering. But although co-seismic landslides locate higher in the landscape than rainfall-induced landslides, geological features strongly modulate their position along the hillslopes.
He Zhang, Emilien Aldana-Jague, François Clapuyt, Florian Wilken, Veerle Vanacker, and Kristof Van Oost
Earth Surf. Dynam., 7, 807–827, https://doi.org/10.5194/esurf-7-807-2019, https://doi.org/10.5194/esurf-7-807-2019, 2019
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We evaluated the performance of a drone system to reconstruct 3-D topography. We used a direct georeferencing method to make the pictures have precise coordinates, which also improves the survey efficiency. With both consumer-grade and professional-grade camera and drone setups, we obtained centimetric accuracy, which provides a flexible application in topography remote sensing using drones.
Brett C. Eaton, R. Dan Moore, and Lucy G. MacKenzie
Earth Surf. Dynam., 7, 789–806, https://doi.org/10.5194/esurf-7-789-2019, https://doi.org/10.5194/esurf-7-789-2019, 2019
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Researchers studying gravel bed rivers almost always require a sample of the bed surface grain size range. These samples are typically expressed as cumulative frequency distributions. We present statistical techniques for generating and plotting confidence intervals for the various size percentiles and for determining whether size percentiles from two samples are statistically different. The techniques are implemented in an R package; a simplified version is implemented in a spreadsheet.
Rebecca L. Caldwell, Douglas A. Edmonds, Sarah Baumgardner, Chris Paola, Samapriya Roy, and Jaap H. Nienhuis
Earth Surf. Dynam., 7, 773–787, https://doi.org/10.5194/esurf-7-773-2019, https://doi.org/10.5194/esurf-7-773-2019, 2019
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River deltas are valuable resources that support biodiversity and human habitation. Despite this we do not have a global census of deltas nor do we know the conditions that promote their formation. We surveyed 5399 river mouths greater than 50 m wide and found that 2174 (40 %) create a delta. The conditions that lead to delta formation are high sediment input and low wave and tide conditions. These results can be used to understand how deltas will adapt to environmental changes.
Jonathan M. Carey, Chris I. Massey, Barbara Lyndsell, and David N. Petley
Earth Surf. Dynam., 7, 707–722, https://doi.org/10.5194/esurf-7-707-2019, https://doi.org/10.5194/esurf-7-707-2019, 2019
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Slow-moving landslides are a major hazard but their movement mechanisms during earthquakes and rainstorms are not fully understood. We collected samples from a slow-moving landslide complex in New Zealand and subjected them to a range of porewater pressure and dynamic stress scenarios in a dynamic back-pressured shear box. Our results show how the complex movement patterns, observed in many large slow-moving landslides, may be mobilized by strong earthquakes and significant rain events.
Maxime Mouyen, Philippe Steer, Kuo-Jen Chang, Nicolas Le Moigne, Cheinway Hwang, Wen-Chi Hsieh, Louise Jeandet, Laurent Longuevergne, Ching-Chung Cheng, Jean-Paul Boy, and Frédéric Masson
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2019-35, https://doi.org/10.5194/esurf-2019-35, 2019
Revised manuscript accepted for ESurf
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Land's erosion creates sediment particles that are redistributed from mountains to oceans, under the action of climate, tectonics or human activities. But measuring the mass of redistributed sediment is difficult. Here we describe a new method combining gravity and photogrammetry measures, which allows us to weigh the mass of sediment redistributed by a landslide and a river in Taiwan from 2015 to 2017. Trying this method in other regions shall help to better understand erosion processes.
Benjamin Lehmann, Frédéric Herman, Pierre G. Valla, Georgina E. King, and Rabiul H. Biswas
Earth Surf. Dynam., 7, 633–662, https://doi.org/10.5194/esurf-7-633-2019, https://doi.org/10.5194/esurf-7-633-2019, 2019
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Assessing the impact of glaciation at the Earth's surface requires simultaneous quantification of the impact of climate variability on past glacier fluctuations and on bedrock erosion. Here we present a new approach for evaluating post-glacial bedrock surface erosion in mountainous environments by combining two different surface exposure dating methods. This approach can be used to estimate how bedrock erosion rates vary spatially and temporally since glacier retreat in an alpine environment.
Stefanie Tofelde, Sara Savi, Andrew D. Wickert, Aaron Bufe, and Taylor F. Schildgen
Earth Surf. Dynam., 7, 609–631, https://doi.org/10.5194/esurf-7-609-2019, https://doi.org/10.5194/esurf-7-609-2019, 2019
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We performed seven physical experiments to explore terrace formation and sediment export from a braided alluvial river system that is perturbed by changes in water discharge, sediment supply, or base level. Each perturbation differently affects (1) the geometry of terraces and channels, (2) the timing of terrace formation, and (3) the transient response of sediment discharge. Our findings provide guidelines for interpreting fill terraces and sediment export from fluvial systems.
W. D. Dimuth P. Welivitiya, Garry R. Willgoose, and Greg R. Hancock
Earth Surf. Dynam., 7, 591–607, https://doi.org/10.5194/esurf-7-591-2019, https://doi.org/10.5194/esurf-7-591-2019, 2019
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The paper describes a model that simultaneously evolves both the soil profile and the landform, creating a coupled soilscape–landscape evolution model. The physics in the model is presented and justified from physical processes. The behaviour of the model is then explored for a variety of process formulations for a one-dimensional hillslope consisting of a flat upslope, steep midslope, and flat lowlands, exploring the erosion and deposition behaviour, and soil profile evolution over time.
Daniel J. Brogan, Peter A. Nelson, and Lee H. MacDonald
Earth Surf. Dynam., 7, 563–590, https://doi.org/10.5194/esurf-7-563-2019, https://doi.org/10.5194/esurf-7-563-2019, 2019
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We used high-resolution topography collected over 4 years to investigate how two watersheds in Colorado responded to the June 2012 High Park Fire and an extreme flood in September 2013. After the fire, sediment was eroded from the hillslopes and deposited in valley bottoms, and the large flood eroded much of this deposited sediment. Patterns of erosion and deposition were related to landscape characteristics, burn severity, and rainfall, which may inform future post-fire treatment strategies.
William Santini, Benoît Camenen, Jérôme Le Coz, Philippe Vauchel, Jean-Loup Guyot, Waldo Lavado, Jorge Carranza, Marco A. Paredes, Jhonatan J. Pérez Arévalo, Nore Arévalo, Raul Espinoza Villar, Frédéric Julien, and Jean-Michel Martinez
Earth Surf. Dynam., 7, 515–536, https://doi.org/10.5194/esurf-7-515-2019, https://doi.org/10.5194/esurf-7-515-2019, 2019
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A simple model is proposed to improve the sediment concentration monitoring in the large rivers of the Peruvian Amazon from an index concentration sampled in the flow. This powerful tool for optimizing the concentration sampling would allow for detailed uncertainty analysis on the sediment fluxes. It could be coupled with remote sensing and hydrological modeling to serve as a step toward the development of an integrated approach for assessing sediment fluxes in poorly monitored basins.
Michel Jaboyedoff, Masahiro Chigira, Noriyuki Arai, Marc-Henri Derron, Benjamin Rudaz, and Ching-Ying Tsou
Earth Surf. Dynam., 7, 439–458, https://doi.org/10.5194/esurf-7-439-2019, https://doi.org/10.5194/esurf-7-439-2019, 2019
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High-resolution digital elevation models (DEMs) can now be acquired using airborne laser scanners. This allows for a detailed analysis of the geometry of landslides. Several large landslides were triggered by Typhoon Talas in Japan in 2011. The comparison of pre- and post-DEMs allowed us to test a method of defining landslide failure surfaces before catastrophic movements. It provides new results about the curvature of the failure surface and the volume expansion of the deposit.
Teun van Woerkom, Jakob F. Steiner, Philip D. A. Kraaijenbrink, Evan S. Miles, and Walter W. Immerzeel
Earth Surf. Dynam., 7, 411–427, https://doi.org/10.5194/esurf-7-411-2019, https://doi.org/10.5194/esurf-7-411-2019, 2019
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Using data obtained from multiple UAV flights over a debris-covered glacier in the Himalaya between 2013 and 2018, we show that the adjacent moraines erode at rates of up to 16 cm per year, contributing to this debris cover. With retreating ice and resulting instability of moraines, this causes the glacier to cover a narrow zone along the lateral moraines in ever-thicker layers of rocks, resulting in a possible future decrease of local melt.
Jessica Zordan, Anton J. Schleiss, and Mário J. Franca
Earth Surf. Dynam., 7, 377–391, https://doi.org/10.5194/esurf-7-377-2019, https://doi.org/10.5194/esurf-7-377-2019, 2019
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The effect of buoyancy and bottom slope on the runout and entrainment capacity of experimentally reproduced saline gravity currents is studied. The shape of the current is modified due to the entrainment of ambient water, particularly within the body region. For steep slopes, two opposite mechanisms of mass exchange are identified: the current entrainment of water from the upper surface due to the enhanced friction at the interface and the head feeding by a rear-fed current.
Alan Kasprak, James Brasington, Konrad Hafen, Richard D. Williams, and Joseph M. Wheaton
Earth Surf. Dynam., 7, 247–274, https://doi.org/10.5194/esurf-7-247-2019, https://doi.org/10.5194/esurf-7-247-2019, 2019
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We present a modelling framework for the prediction of gravel-bed braided river evolution. The model is unique in that it simplifies sediment transport through the use of empirically-derived relationships between channel form and flood-scale particle transport distances, or path lengths, which ultimately allow for longer duration model runs with reduced computational demand. We use field surveys on two braided rivers to validate the model at the event, annual, and decadal timescales.
Richard Hale, Rachel Bain, Steven Goodbred Jr., and Jim Best
Earth Surf. Dynam., 7, 231–245, https://doi.org/10.5194/esurf-7-231-2019, https://doi.org/10.5194/esurf-7-231-2019, 2019
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In Bangladesh, we measure how water and sediment move through tidal channels in an area heavily impacted by both sea-level rise and the strategies that humans use to adapt. We found that the amount of water moving through the system is largely controlled by the strength of the tides, while the mass of sediment being transported is strongly connected to the season and to a lesser extent the tides. These results are important for developing strategies to protect both human and natural landscapes.
Odin Marc, Robert Behling, Christoff Andermann, Jens M. Turowski, Luc Illien, Sigrid Roessner, and Niels Hovius
Earth Surf. Dynam., 7, 107–128, https://doi.org/10.5194/esurf-7-107-2019, https://doi.org/10.5194/esurf-7-107-2019, 2019
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We mapped eight monsoon-related (> 100 m2) and large (> 0.1 km2) landslides in the Nepal Himalayas since 1970. Adding inventories of Holocene landslides, giant landslides (> 1 km3), and landslides from the 2015 Gorkha earthquake, we constrain the size–frequency distribution of monsoon- and earthquake-induced landslides. Both contribute ~50 % to a long-term (> 10 kyr) total erosion of ~2 mm yr-1, matching the long-term exhumation rate. Large landslides rarer than 10Be sampling time drive erosion.
Pauline Leduc, Sarah Peirce, and Peter Ashmore
Earth Surf. Dynam., 7, 97–106, https://doi.org/10.5194/esurf-7-97-2019, https://doi.org/10.5194/esurf-7-97-2019, 2019
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This paper presents applications of structure-from-motion photogrammetry in a physical model of a braided river used to quantify morphology change and provide estimates of water depth, as well as image analysis for mapping bed surface texture.
Adam M. Forte and Kelin X. Whipple
Earth Surf. Dynam., 7, 87–95, https://doi.org/10.5194/esurf-7-87-2019, https://doi.org/10.5194/esurf-7-87-2019, 2019
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Quantitative analysis of digital topography is an important part of many modern geologic investigations. We have constructed a series of software tools, the Topographic Analysis Kit (TAK), built on top of the existing TopoToolbox library, to allow for efficient and easy analysis of topography that limits the required computing and domain-specific knowledge necessary to successfully produce robust analyses of topographic data.
Eli D. Lazarus, Mitchell D. Harley, Chris E. Blenkinsopp, and Ian L. Turner
Earth Surf. Dynam., 7, 77–86, https://doi.org/10.5194/esurf-7-77-2019, https://doi.org/10.5194/esurf-7-77-2019, 2019
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A single storm event can change the shape of a sandy beach dramatically, but beaches also exhibit a remarkable ability to recover. So how important are storm-driven changes to a beach in the long term? This question affects predictions of future shoreline change. Here we explore
signal shredding– when sediment transport erases any signature of outside driving forces. Our results suggest that major storm impacts may tell us little about long-term shoreline change and vice versa.
Andrew D. Wickert and Taylor F. Schildgen
Earth Surf. Dynam., 7, 17–43, https://doi.org/10.5194/esurf-7-17-2019, https://doi.org/10.5194/esurf-7-17-2019, 2019
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Rivers can raise or lower their beds by depositing or eroding sediments. We combine equations for flow, channel/valley geometry, and gravel transport to learn how climate and tectonics shape down-valley profiles of river-bed elevation. Rivers steepen when they receive more sediment (relative to water) and become straighter with tectonic uplift. Weathering and breakdown of gravel is needed to produce gradually widening river channels with concave-up profiles that are often observed in the field.
David Jon Furbish, Rina Schumer, and Amanda Keen-Zebert
Earth Surf. Dynam., 6, 1169–1202, https://doi.org/10.5194/esurf-6-1169-2018, https://doi.org/10.5194/esurf-6-1169-2018, 2018
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We present in this mostly theoretical contribution a systematic treatment of tracer particle mixing in soils. We elaborate the consequences of rarefied (non-continuum) conditions of transport and mixing, and we augment this with numerical analyses that reveal important information not readily apparent in the analytical formulations, including an illustration of the variability in 10Be concentrations and OSL ages of individual particles in soils, with implications for interpreting field data.
John B. Shaw, Justin D. Estep, Amanda R. Whaling, Kelly M. Sanks, and Douglas A. Edmonds
Earth Surf. Dynam., 6, 1155–1168, https://doi.org/10.5194/esurf-6-1155-2018, https://doi.org/10.5194/esurf-6-1155-2018, 2018
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Deltas are important landforms because many people live near them. Specific water flow patterns of spreading and contraction are produced where delta channel flow meets the ocean. Tracers on the water surface allow this pattern to be measured from space. We identify this pattern on a growing river delta in 40 years of images, allowing us to track its growth in a new way. This method has potential to improve monitoring of deltas worldwide.
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Short summary
Glacial erosion is known to limit the height of midlatitude mountain ranges affected by substantial glaciation during cold periods. Our study examines this phenomenon in the tropics. A new form of hypsometric analysis, along with other evidence, of 10 tropical ranges reveals widespread signs of a perched glacial base level at the ELA. Although glacial influence is moderate to weak in these environments, the evidence suggests that glacial erosion acts to limit the height of tropical ranges.
Glacial erosion is known to limit the height of midlatitude mountain ranges affected by...
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