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Earth Surface Dynamics
An interactive open-access journal of the European Geosciences Union
Journal topic
- Articles & preprints
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- Policies
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IF 3.928
3.864CiteScore
6.2SNIP 1.469
SJR 1.666
index 21h5-index 23
Abstracted/indexed
Abstracted/indexed
Volume 3, issue 4
Earth Surf. Dynam., 3, 543–558, 2015
https://doi.org/10.5194/esurf-3-543-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esurf-3-543-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Earth Surf. Dynam., 3, 543–558, 2015
https://doi.org/10.5194/esurf-3-543-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/esurf-3-543-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article 01 Dec 2015
Research article | 01 Dec 2015
Block and boulder transport in Eastern Samar (Philippines) during Supertyphoon Haiyan
S. M. May et al.
Related authors
Dominik Brill, Simon Matthias May, Nadia Mhammdi, Georgina King, Christoph Burow, Dennis Wolf, Anja Zander, Benjamin Lehmann, and Helmut Brückner
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-46, https://doi.org/10.5194/esurf-2020-46, 2020
Preprint under review for ESurf
Short summary
Short summary
Wave-transported boulders are important records for storm and tsunami impact over geological timescales. Their use for hazard assessment requires chronological information. We investigated the potential of a new dating technique, luminescence rock surface exposure dating, for estimating transport ages of wave-emplaced boulders. Our results show that the new approach may provide chronological information over decadal to millennial timescales for boulders not datable by any other method so far.
Hannes Laermanns, Simon Matthias May, Daniel Kelterbaum, Giorgi Kirkitadze, Stephan Opitz, Levan Navrozashvili, Mikheil Elashvili, and Helmut Brückner
E&G Quaternary Sci. J., 68, 119–139, https://doi.org/10.5194/egqsj-68-119-2019, https://doi.org/10.5194/egqsj-68-119-2019, 2019
Short summary
Short summary
The landscape on the Black Sea coast of Georgia has changed significantly during the last few millennia. By using granulometric and geochemical analyses, we reconstructed significant sea level, coastline and palaeoenvironmental changes that have taken place in the surroundings of the Supsa fan since at least 4000 BCE.
Dominik Brill, Simon Matthias May, Max Engel, Michelle Reyes, Anna Pint, Stephan Opitz, Manuel Dierick, Lia Anne Gonzalo, Sascha Esser, and Helmut Brückner
Nat. Hazards Earth Syst. Sci., 16, 2799–2822, https://doi.org/10.5194/nhess-16-2799-2016, https://doi.org/10.5194/nhess-16-2799-2016, 2016
Short summary
Short summary
Sediments and landforms related to Typhoon Haiyan were documented for coastal settings on the Philippines. Sand sheets are restricted to coasts with strong inundation, while washover fans due to overtopping waves were more abundant. Wave-generated coral ridges are reported from an intertidal reef platform. As generated by an exceptional storm, documented signatures like the limited landward extent of sand sheets may potentially help to distinguish storm and tsunami in the geological record.
Dominik Brill, Simon Matthias May, Nadia Mhammdi, Georgina King, Christoph Burow, Dennis Wolf, Anja Zander, Benjamin Lehmann, and Helmut Brückner
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-46, https://doi.org/10.5194/esurf-2020-46, 2020
Preprint under review for ESurf
Short summary
Short summary
Wave-transported boulders are important records for storm and tsunami impact over geological timescales. Their use for hazard assessment requires chronological information. We investigated the potential of a new dating technique, luminescence rock surface exposure dating, for estimating transport ages of wave-emplaced boulders. Our results show that the new approach may provide chronological information over decadal to millennial timescales for boulders not datable by any other method so far.
Max Engel, Stefanie Rückmann, Philipp Drechsler, Dominik Brill, Stephan Opitz, Jörg W. Fassbinder, Anna Pint, Kim Peis, Dennis Wolf, Christoph Gerber, Kristina Pfeiffer, Ricardo Eichmann, and Helmut Brückner
E&G Quaternary Sci. J., 68, 215–236, https://doi.org/10.5194/egqsj-68-215-2020, https://doi.org/10.5194/egqsj-68-215-2020, 2020
Hannes Laermanns, Simon Matthias May, Daniel Kelterbaum, Giorgi Kirkitadze, Stephan Opitz, Levan Navrozashvili, Mikheil Elashvili, and Helmut Brückner
E&G Quaternary Sci. J., 68, 119–139, https://doi.org/10.5194/egqsj-68-119-2019, https://doi.org/10.5194/egqsj-68-119-2019, 2019
Short summary
Short summary
The landscape on the Black Sea coast of Georgia has changed significantly during the last few millennia. By using granulometric and geochemical analyses, we reconstructed significant sea level, coastline and palaeoenvironmental changes that have taken place in the surroundings of the Supsa fan since at least 4000 BCE.
Dominik Brill, Simon Matthias May, Max Engel, Michelle Reyes, Anna Pint, Stephan Opitz, Manuel Dierick, Lia Anne Gonzalo, Sascha Esser, and Helmut Brückner
Nat. Hazards Earth Syst. Sci., 16, 2799–2822, https://doi.org/10.5194/nhess-16-2799-2016, https://doi.org/10.5194/nhess-16-2799-2016, 2016
Short summary
Short summary
Sediments and landforms related to Typhoon Haiyan were documented for coastal settings on the Philippines. Sand sheets are restricted to coasts with strong inundation, while washover fans due to overtopping waves were more abundant. Wave-generated coral ridges are reported from an intertidal reef platform. As generated by an exceptional storm, documented signatures like the limited landward extent of sand sheets may potentially help to distinguish storm and tsunami in the geological record.
Kelvin S. Rodolfo, A. Mahar F. Lagmay, Rodrigo C. Eco, Tatum Miko L. Herrero, Jerico E. Mendoza, Likha G. Minimo, and Joy T. Santiago
Nat. Hazards Earth Syst. Sci., 16, 2683–2695, https://doi.org/10.5194/nhess-16-2683-2016, https://doi.org/10.5194/nhess-16-2683-2016, 2016
Short summary
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In 2012, a village in southern Philippines was wiped out by catastrophic debris flows generated Super Typhoon Bopha. This area of the country is seldom hit by strong typhoons; nevertheless, geologic evidence shows that such events have happened in the past. We put this in the context of the expansion of human settlements to understand why the disaster happened. Doing so will enable communities that are not used to such events to prepare for them.
Paul Kenneth Luzon, Kristina Montalbo, Jam Galang, Jasmine May Sabado, Carmille Marie Escape, Raquel Felix, and Alfredo Mahar Francisco Lagmay
Nat. Hazards Earth Syst. Sci., 16, 875–883, https://doi.org/10.5194/nhess-16-875-2016, https://doi.org/10.5194/nhess-16-875-2016, 2016
Short summary
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To investigate the present-day morphology of the 2006 Guinsaugon landslide scar and potential failure that may occur, analysis of a 5 m resolution IfSAR-derived DTM was conducted using Coltop3D and Matterocking software to produce a structurally controlled landslide hazard map for Southern Leyte, Philippines. This type of simulated hazard maps would be useful for disaster prevention and to facilitate disaster risk reduction efforts for landslide-susceptible areas in the country.
J. P. Lapidez, J. Tablazon, L. Dasallas, L. A. Gonzalo, K. M. Cabacaba, M. M. A. Ramos, J. K. Suarez, J. Santiago, A. M. F. Lagmay, and V. Malano
Nat. Hazards Earth Syst. Sci., 15, 1473–1481, https://doi.org/10.5194/nhess-15-1473-2015, https://doi.org/10.5194/nhess-15-1473-2015, 2015
J. Tablazon, C. V. Caro, A. M. F. Lagmay, J. B. L. Briones, L. Dasallas, J. P. Lapidez, J. Santiago, J. K. Suarez, C. Ladiero, L. A. Gonzalo, M. T. F. Mungcal, and V. Malano
Nat. Hazards Earth Syst. Sci., 15, 557–570, https://doi.org/10.5194/nhess-15-557-2015, https://doi.org/10.5194/nhess-15-557-2015, 2015
A. M. F. Lagmay and R. Eco
Nat. Hazards Earth Syst. Sci., 14, 2795–2801, https://doi.org/10.5194/nhess-14-2795-2014, https://doi.org/10.5194/nhess-14-2795-2014, 2014
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
A 6-year lidar survey reveals enhanced rockwall retreat and modified rockfall magnitudes/frequencies in deglaciating cirques
Short communication: Field data reveal that the transport probability of clasts in Peruvian and Swiss streams mainly depends on the sorting of the grains
Alluvial cover on bedrock channels: applicability of existing models
Scale breaks of suspended sediment rating in large rivers in Germany induced by organic matter
Modelling impacts of spatially variable erosion drivers on suspended sediment dynamics
Mātauranga Māori in geomorphology: existing frameworks, case studies, and recommendations for incorporating Indigenous knowledge in Earth science
The impact of earthquakes on orogen-scale exhumation
Quantifying sediment mass redistribution from joint time-lapse gravimetry and photogrammetry surveys
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
On how sediment supply affects step formation, evolution and stability in steep streams: an experimental study
Experimental evidence for bifurcation angles control on abandoned channel fill geometry
A bed load transport equation based on the spatial distribution of shear stress – Oak Creek revisit
Morphometric properties of alternate bars and water discharge: a laboratory investigation
Timing of exotic, far-travelled boulder emplacement and paleo-outburst flooding in the central Himalaya
Large wood as a confounding factor in interpreting the width of spring-fed streams
Implementing a hydrodynamic model to complement water depth and flow velocity data for physical scale experiments of rivers and estuaries
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
Stabilising large grains in self-forming steep channels
Dynamic allometry in coastal overwash morphology
Potential links between Baltic Sea submarine terraces and groundwater seeping
Estimating the disequilibrium in denudation rates due to divide migration at the scale of river basins
Permafrost distribution in steep rock slopes in Norway: measurements, statistical modelling and implications for geomorphological processes
Topographic controls on divide migration, stream capture, and diversification in riverine life
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
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
Ingo Hartmeyer, Markus Keuschnig, Robert Delleske, Michael Krautblatter, Andreas Lang, Lothar Schrott, Günther Prasicek, and Jan-Christoph Otto
Earth Surf. Dynam., 8, 753–768, https://doi.org/10.5194/esurf-8-753-2020, https://doi.org/10.5194/esurf-8-753-2020, 2020
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Rockfall size and frequency in two deglaciating cirques in the Central Alps, Austria, is analysed based on 6-year rockwall monitoring with terrestrial lidar (2011–2017). The erosion rates derived from this dataset are very high due to a frequent occurrence of large rockfalls in freshly deglaciated areas. The results obtained are important for rockfall hazard assessments, as, in rockwalls affected by glacier retreat, historical rockfall patterns are not good predictors of future events.
Fritz Schlunegger, Romain Delunel, and Philippos Garefalakis
Earth Surf. Dynam., 8, 717–728, https://doi.org/10.5194/esurf-8-717-2020, https://doi.org/10.5194/esurf-8-717-2020, 2020
Short summary
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We calculated the probability of sediment transport in coarse-grained mountainous streams in the Alps and the Andes where data on water discharge is available. We find a positive correlation between the predicted probability of sediment transport and the grain size sorting of the bed material. We suggest that besides sediment discharge, the bedload sorting exerts a significant influence on the mobility of sediment and thus on the stability of gravel bars in mountainous streams.
Jagriti Mishra and Takuya Inoue
Earth Surf. Dynam., 8, 695–716, https://doi.org/10.5194/esurf-8-695-2020, https://doi.org/10.5194/esurf-8-695-2020, 2020
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This study provides an extensive review of field- and laboratory-scale studies and mathematical models used for predicting the sediment processes in bedrock river channels. We tested the model capabilities by reproducing and comparing the results with laboratory-scale experiments. This study provides an insight into the strengths and shortcomings of various available models.
Thomas O. Hoffmann, Yannik Baulig, Helmut Fischer, and Jan Blöthe
Earth Surf. Dynam., 8, 661–678, https://doi.org/10.5194/esurf-8-661-2020, https://doi.org/10.5194/esurf-8-661-2020, 2020
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We study the dynamics of suspended matter and associated nutrients in large rivers in Germany. The relationship between suspended sediment concentration and discharge is diagnostic of the processes and sources of suspended matter. We show that suspended matter originates from organic growth within the river at low flow and from soil erosion at high flow. In a warmer climate with increased frequency of droughts, low flow states are likely to be more prolonged, affecting the behavior of rivers.
Giulia Battista, Peter Molnar, and Paolo Burlando
Earth Surf. Dynam., 8, 619–635, https://doi.org/10.5194/esurf-8-619-2020, https://doi.org/10.5194/esurf-8-619-2020, 2020
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Suspended sediment load in rivers is highly uncertain because of spatial and temporal variability. By means of a hydrology and suspended sediment transport model, we investigated the effect of spatial variability in precipitation and surface erodibility on catchment sediment fluxes in a mesoscale river basin.
We found that sediment load depends on the spatial variability in erosion drivers, as this affects erosion rates and the location and connectivity to the channel of the erosion areas.
Clare Wilkinson, Daniel C. H. Hikuroa, Angus H. Macfarlane, and Matthew W. Hughes
Earth Surf. Dynam., 8, 595–618, https://doi.org/10.5194/esurf-8-595-2020, https://doi.org/10.5194/esurf-8-595-2020, 2020
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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.
Oliver R. Francis, Tristram C. Hales, Daniel E. J. Hobley, Xuanmei Fan, Alexander J. Horton, Gianvito Scaringi, and Runqiu Huang
Earth Surf. Dynam., 8, 579–593, https://doi.org/10.5194/esurf-8-579-2020, https://doi.org/10.5194/esurf-8-579-2020, 2020
Short summary
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Large earthquakes can build mountains by uplifting bedrock, but they also erode them by triggering large volumes of coseismic landsliding. Using a zero-dimensional numerical model, we identify that the storage of sediment produced by earthquakes can affect surface uplift and exhumation rates across the mountain range. However, the storage also reduces the time span at which the impact of the earthquake can be measured, preventing the recognition of single earthquakes in many long-term records.
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., 8, 555–577, https://doi.org/10.5194/esurf-8-555-2020, https://doi.org/10.5194/esurf-8-555-2020, 2020
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Land erosion creates sediment particles that are redistributed from mountains to oceans through climatic, tectonic and human activities, but measuring the mass of redistributed sediment is difficult. Here we describe a new method combining gravity and photogrammetry measurements, which make it possible 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 will help us to better understand the erosion process.
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.
Matteo Saletti and Marwan A. Hassan
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-30, https://doi.org/10.5194/esurf-2020-30, 2020
Revised manuscript accepted for ESurf
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Mountain streams often display a stepped morphology but the conditions under which these steps form, remain stable, and eventually collapse are still not entirely clear. We run flume experiments to study how (a) the amount of sediment input and (b) channel width variations affect steps dynamic in steep channels. Steps form preferentially in areas of flow convergence (channel narrowing) and their frequency is higher when sediment supply is larger than zero but smaller than the transport capacity.
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
Angel Monsalve, Catalina Segura, Nicole Hucke, and Scott Katz
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-25, https://doi.org/10.5194/esurf-2020-25, 2020
Revised manuscript accepted for ESurf
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Part of the inaccuracies when estimating bedload transport in gravel-bed rivers is because we are not considering the wide distributions of shear stress in these systems. We modified a subsurface-based bedload transport equation to include these distributions. By doing so, our approach accurately predicts bedload transport rates when the pavement layer is still present while the original one predicts zero transport. For high flows, our method had a similar performance than the original equation.
Marco Redolfi, Matilde Welber, Mattia Carlin, Marco Tubino, and Walter Bertoldi
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-27, https://doi.org/10.5194/esurf-2020-27, 2020
Revised manuscript accepted for ESurf
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Alternate bars are large sediment deposits that tend to naturally form in rivers when the channel width is sufficiently large. Our laboratory experiments on a scaled model reveal that equilibrium properties of self-formed alternate bars highly depend on the water discharge with respect to the relevant theoretical thresholds. This work provides fundamental information for predicting the response of rivers to natural or human alterations of the flow regime.
Marius L. Huber, Maarten Lupker, Sean F. Gallen, Marcus Christl, and Ananta P. Gajurel
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-17, https://doi.org/10.5194/esurf-2020-17, 2020
Revised manuscript accepted for ESurf
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Large boulders found in two Himalayan valleys show signs of long fluvial transport (> 10 km). Paleo-discharges required to mobilise these boulders, exceed typical monsoon discharges. Exposure dating shows that a cluster of these boulders was emplaced ca. 5 kyrs ago. This period is coeval with a weakening of the Indian monsoon and glacier retreat in the area. We, therefore, suggest that glacier lake outburst floods are likely mechanisms that can explain these exceptional transport processes.
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.
Steven A. H. Weisscher, Marcio Boechat-Albernaz, Jasper R. F. W. Leuven, Wout M. Van Dijk, Yasuyuki Shimizu, and Maarten G. Kleinhans
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2020-14, https://doi.org/10.5194/esurf-2020-14, 2020
Revised manuscript under review for ESurf
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Accurate and continuous data collection is challenging in physical scale experiments. A novel means to augment measurements is to numerically model flow over the experimental digital elevation maps. We tested this modelling approach for one tidal and two river scale experiments and showed that modelled water depth and flow velocity closely resemble the measurements. The implication is that conducting experiments requires fewer measurements and results in flow data of better overall quality.
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.
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.
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.
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.
Nathan J. Lyons, Pedro Val, James S. Albert, Jane K. Willenbring, and Nicole M. Gasparini
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2019-55, https://doi.org/10.5194/esurf-2019-55, 2019
Revised manuscript accepted for ESurf
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Changes in topographic structure affect the geographic ranges of organisms by fragmenting habitats, which can lead to new species, and shrinking habitats, which increase extinction rates. We developed an approach and applied a new modelling tool to assess how changes in the course of a river impact riverine species. This first application of the tool demonstrates that following climatic and tectonic change, species can proliferate or diminish, depending on the details of topographic structure.
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
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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.
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.
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.
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Block and boulder fields record catastrophic coastal flooding events and play a pivotal role in coastal hazard assessment. After Supertyphoon Haiyan on 8 Nov 2013 the transport of extremely large blocks of up to 180 t in E Samar (Philippines) was documented, indicating that hydrodynamic conditions induced by tropical cyclones, including infragravity waves, and resulting coarse-clast transport patterns may be comparable to tsunamis.
Block and boulder fields record catastrophic coastal flooding events and play a pivotal role in...
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