Articles | Volume 6, issue 1
https://doi.org/10.5194/esurf-6-29-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-6-29-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Feb 2018
Research article |
| 06 Feb 2018
| 06 Feb 2018
Alluvial cover controlling the width, slope and sinuosity of bedrock channels
Jens Martin Turowski
CORRESPONDING AUTHOR
Helmholtz-Zentrum Potsdam, German Research Centre for Geosciences GFZ,
Telegrafenberg, 14473 Potsdam, Germany
Related authors
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
Short summary
Short summary
Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Chuanqi He, Ci-Jian Yang, Jens M. Turowski, Richard F. Ott, Jean Braun, Hui Tang, Shadi Ghantous, Xiaoping Yuan, and Gaia Stucky de Quay
Earth Syst. Sci. Data, 16, 1151–1166, https://doi.org/10.5194/essd-16-1151-2024, https://doi.org/10.5194/essd-16-1151-2024, 2024
Short summary
Short summary
The shape of drainage basins and rivers holds significant implications for landscape evolution processes and dynamics. We used a global 90 m resolution topography to obtain ~0.7 million drainage basins with sizes over 50 km2. Our dataset contains the spatial distribution of drainage systems and their morphological parameters, supporting fields such as geomorphology, climatology, biology, ecology, hydrology, and natural hazards.
Sophia Dosch, Niels Hovius, Marisa Repasch, Joel Scheingross, Jens M. Turowski, Stefanie Tofelde, Oliver Rach, and Dirk Sachse
EGUsphere, https://doi.org/10.5194/egusphere-2023-2485, https://doi.org/10.5194/egusphere-2023-2485, 2023
Short summary
Short summary
The transport of plant debris in rivers is an important part of the global carbon cycle and influences atmospheric carbon levels through time. We sampled plant debris at the bed of a lowland river and determined the sources as it is transported hundreds of kilometers. Plant debris can persist at the river bed, but mechanical breakdown reduces its amount, and it is only a small fraction compared to the suspended load. This plant debris and transport patterns need further investigations globally.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
Short summary
Short summary
Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Ci-Jian Yang, Pei-Hao Chen, Erica D. Erlanger, Jens M. Turowski, Sen Xu, Tse-Yang Teng, Jiun-Chuan Lin, and Jr-Chuang Huang
Earth Surf. Dynam., 11, 475–486, https://doi.org/10.5194/esurf-11-475-2023, https://doi.org/10.5194/esurf-11-475-2023, 2023
Short summary
Short summary
Observations of the interaction between extreme physical erosion and chemical weathering dynamics are limited. We presented major elements of stream water in the badland catchment at 3 h intervals during a 3 d typhoon. The excess sodium in the evaporite deposits causes material dispersion through deflocculation, which enhances the suspended sediment flux. Moreover, we observed a shift from predominantly evaporite weathering at peak precipitation to silicate weathering at peak discharge.
Odin Marc, Jens M. Turowski, and Patrick Meunier
Earth Surf. Dynam., 9, 995–1011, https://doi.org/10.5194/esurf-9-995-2021, https://doi.org/10.5194/esurf-9-995-2021, 2021
Short summary
Short summary
The size of grains delivered to rivers is an essential parameter for understanding erosion and sediment transport and their related hazards. In mountains, landslides deliver these rock fragments, but few studies have analyzed the landslide properties that control the resulting sizes. We present measurements on 17 landslides from Taiwan and show that their grain sizes depend on rock strength, landslide depth and drop height, thereby validating and updating a previous theory on fragmentation.
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
Short summary
Short summary
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.
Mitch K. D'Arcy, Taylor F. Schildgen, Jens M. Turowski, and Pedro DiNezio
Earth Surf. Dynam., 7, 755–771, https://doi.org/10.5194/esurf-7-755-2019, https://doi.org/10.5194/esurf-7-755-2019, 2019
Short summary
Short summary
The age of formation of sedimentary deposits is often interpreted to record information about past environmental changes. Here, we show that the timing of abandonment of surfaces also provides valuable information. We derive a new set of equations that can be used to estimate when a sedimentary surface was abandoned based on what is known about its activity from surface dating. Estimates of abandonment age can benefit a variety of geomorphic analyses, which we illustrate with a case study.
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
Short summary
Short summary
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.
Anne Schöpa, Wei-An Chao, Bradley P. Lipovsky, Niels Hovius, Robert S. White, Robert G. Green, and Jens M. Turowski
Earth Surf. Dynam., 6, 467–485, https://doi.org/10.5194/esurf-6-467-2018, https://doi.org/10.5194/esurf-6-467-2018, 2018
Short summary
Short summary
On 21 July 2014, a voluminous landslide entered the caldera lake at Askja, Iceland, and created tsunami waves inundating famous tourist spots. The high hazard potential of the site motivated our study in which we analysed seismic data and found a precursory tremor signal intensifying in the 30 min before the landslide. Our paper shows the potential of seismic monitoring techniques to detect precursory activity before a big landslide that could be used for an early-warning system.
Michael Dietze, Jens M. Turowski, Kristen L. Cook, and Niels Hovius
Earth Surf. Dynam., 5, 757–779, https://doi.org/10.5194/esurf-5-757-2017, https://doi.org/10.5194/esurf-5-757-2017, 2017
Short summary
Short summary
Rockfall is an essential geomorphic process and a hazard in steep landscapes which is hard to constrain with traditional approaches. Seismic methods allow for the detection, location, characterisation and linking of events to triggers by lag times. This new technique reveals 49 rockfalls in 6 months with seasonally varying locations. Freeze–thaw action accounts for only 5 events, whereas 19 rockfalls were caused by rain with a 1 h peak lag time, and 17 events were due to diurnal thermal forcing.
Albrecht von Boetticher, Jens M. Turowski, Brian W. McArdell, Dieter Rickenmann, Marcel Hürlimann, Christian Scheidl, and James W. Kirchner
Geosci. Model Dev., 10, 3963–3978, https://doi.org/10.5194/gmd-10-3963-2017, https://doi.org/10.5194/gmd-10-3963-2017, 2017
Short summary
Short summary
The open-source fluid dynamic solver presented in v. Boetticher et al. (2016) combines a Coulomb viscosplastic rheological model with a Herschel–Bulkley model based on material properties for 3-D debris flow simulations. Here, we validate the solver and illustrate the model sensitivity to water content, channel curvature, content of fine material and channel bed roughness. We simulate both laboratory-scale and large-scale debris-flow experiments, using only one of the two calibration parameters.
Michael Dietze, Solmaz Mohadjer, Jens M. Turowski, Todd A. Ehlers, and Niels Hovius
Earth Surf. Dynam., 5, 653–668, https://doi.org/10.5194/esurf-5-653-2017, https://doi.org/10.5194/esurf-5-653-2017, 2017
Short summary
Short summary
We use a seismometer network to detect and locate rockfalls, a key process shaping steep mountain landscapes. When tested against laser scan surveys, all seismically detected events could be located with an average deviation of 81 m. Seismic monitoring provides insight to the dynamics of individual rockfalls, which can be as small as 0.0053 m3. Thus, seismic methods provide unprecedented temporal, spatial and kinematic details about this important process.
Antonius Golly and Jens M. Turowski
Earth Surf. Dynam., 5, 557–570, https://doi.org/10.5194/esurf-5-557-2017, https://doi.org/10.5194/esurf-5-557-2017, 2017
Short summary
Short summary
Researchers of fluvial geomorphology require reliable information on channel width and its change in space and time. For example, to study bank erosion rates we need the local position of channel banks before and after a high flood event. Although deriving these metrics seems simple, researchers often use manual or arbitrary approaches that are not objective and reproducible. Here, we present an open-source software tool
cmgo(R package) that meets the requirements of academic research.
Fabian Walter, Arnaud Burtin, Brian W. McArdell, Niels Hovius, Bianca Weder, and Jens M. Turowski
Nat. Hazards Earth Syst. Sci., 17, 939–955, https://doi.org/10.5194/nhess-17-939-2017, https://doi.org/10.5194/nhess-17-939-2017, 2017
Short summary
Short summary
Debris flows are naturally occuring mass motion events, which mobilize loose material in steep Alpine torrents. The destructive potential of debris flows is well known and demands early warning. Here we apply the amplitude source location (ASL) method to seismic ground vibrations induced by a debris flow event in Switzerland. The method efficiently detects the initiation of the event and traces its front propagation down the torrent channel.
Jens M. Turowski and Rebecca Hodge
Earth Surf. Dynam., 5, 311–330, https://doi.org/10.5194/esurf-5-311-2017, https://doi.org/10.5194/esurf-5-311-2017, 2017
Short summary
Short summary
Bedrock incision by rivers is driven by the impacts of sediment particles moved by the water flow. Sediment residing on the bed can protect the rock from impacts, thereby reducing erosion rates, a phenomenon known as the cover effect. The cover effect has been shown to be important in many field and laboratory experiments. Here, we develop a mathematical framework to describe the cover effect which can be used to compare data and to predict the extent of cover in streams.
Alexander R. Beer, James W. Kirchner, and Jens M. Turowski
Earth Surf. Dynam., 4, 885–894, https://doi.org/10.5194/esurf-4-885-2016, https://doi.org/10.5194/esurf-4-885-2016, 2016
Short summary
Short summary
Spatial bedrock erosion data from stream channels are important for engineering issues and landscape evolution model assessment. However, acquiring such data is challenging and only few data sets exist. Detecting changes in repeated photographs of painted bedrock surfaces easily allows for semi-quantitative conclusions on the spatial distribution of sediment transport and its effects: abrasion on surfaces facing the streamflow and shielding of surfaces by abundant sediment.
Albrecht von Boetticher, Jens M. Turowski, Brian W. McArdell, Dieter Rickenmann, and James W. Kirchner
Geosci. Model Dev., 9, 2909–2923, https://doi.org/10.5194/gmd-9-2909-2016, https://doi.org/10.5194/gmd-9-2909-2016, 2016
Short summary
Short summary
Debris flows are characterized by unsteady flows of water with different content of clay, silt, sand, gravel, and large particles, resulting in a dense moving mixture mass. Here we present a three-dimensional fluid dynamic solver that simulates the flow as a mixture of a pressure-dependent rheology model of the gravel mixed with a Herschel–Bulkley rheology of the fine material suspension. We link rheological parameters to the material composition. The user must specify two free model parameters.
Arnaud Burtin, Niels Hovius, and Jens M. Turowski
Earth Surf. Dynam., 4, 285–307, https://doi.org/10.5194/esurf-4-285-2016, https://doi.org/10.5194/esurf-4-285-2016, 2016
A. von Boetticher, J. M. Turowski, B. W. McArdell, D. Rickenmann, M. Hürlimann, C. Scheidl, and J. W. Kirchner
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmdd-8-6379-2015, https://doi.org/10.5194/gmdd-8-6379-2015, 2015
Preprint withdrawn
M. Jochner, J. M. Turowski, A. Badoux, M. Stoffel, and C. Rickli
Earth Surf. Dynam., 3, 311–320, https://doi.org/10.5194/esurf-3-311-2015, https://doi.org/10.5194/esurf-3-311-2015, 2015
Short summary
Short summary
The export of coarse particulate organic matter (CPOM) from mountain catchments seems to be strongly linked to rising discharge, but the mechanism leading to this is unclear. We show that log jams in a steep headwater stream are an effective barrier for CPOM export. Exceptional discharge events play a dual role: First, they destroy existing jams, releasing stored material. Second, they intensify channel--hillslope coupling, thereby recruiting logs to the channel, around which new jams can form.
A. R. Beer and J. M. Turowski
Earth Surf. Dynam., 3, 291–309, https://doi.org/10.5194/esurf-3-291-2015, https://doi.org/10.5194/esurf-3-291-2015, 2015
Short summary
Short summary
We applied a spatiotemporally highly resolved dataset of discharge, sediment transport and bedrock erosion data to assess the validity of landscape evolution models at the process scale (resolution of square meters and minutes). The tools effect is found to be the dominant driver of erosion and an easy model is able to predict measured erosion. For larger scales common discharge-dependend modeling with a discharge threshold is adequate to regive the overal trend of the erosion signal.
A. Burtin, N. Hovius, B. W. McArdell, J. M. Turowski, and J. Vergne
Earth Surf. Dynam., 2, 21–33, https://doi.org/10.5194/esurf-2-21-2014, https://doi.org/10.5194/esurf-2-21-2014, 2014
J. M. Turowski, A. Badoux, K. Bunte, C. Rickli, N. Federspiel, and M. Jochner
Earth Surf. Dynam., 1, 1–11, https://doi.org/10.5194/esurf-1-1-2013, https://doi.org/10.5194/esurf-1-1-2013, 2013
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
Short summary
Short summary
Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Chuanqi He, Ci-Jian Yang, Jens M. Turowski, Richard F. Ott, Jean Braun, Hui Tang, Shadi Ghantous, Xiaoping Yuan, and Gaia Stucky de Quay
Earth Syst. Sci. Data, 16, 1151–1166, https://doi.org/10.5194/essd-16-1151-2024, https://doi.org/10.5194/essd-16-1151-2024, 2024
Short summary
Short summary
The shape of drainage basins and rivers holds significant implications for landscape evolution processes and dynamics. We used a global 90 m resolution topography to obtain ~0.7 million drainage basins with sizes over 50 km2. Our dataset contains the spatial distribution of drainage systems and their morphological parameters, supporting fields such as geomorphology, climatology, biology, ecology, hydrology, and natural hazards.
Sophia Dosch, Niels Hovius, Marisa Repasch, Joel Scheingross, Jens M. Turowski, Stefanie Tofelde, Oliver Rach, and Dirk Sachse
EGUsphere, https://doi.org/10.5194/egusphere-2023-2485, https://doi.org/10.5194/egusphere-2023-2485, 2023
Short summary
Short summary
The transport of plant debris in rivers is an important part of the global carbon cycle and influences atmospheric carbon levels through time. We sampled plant debris at the bed of a lowland river and determined the sources as it is transported hundreds of kilometers. Plant debris can persist at the river bed, but mechanical breakdown reduces its amount, and it is only a small fraction compared to the suspended load. This plant debris and transport patterns need further investigations globally.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
Short summary
Short summary
Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Ci-Jian Yang, Pei-Hao Chen, Erica D. Erlanger, Jens M. Turowski, Sen Xu, Tse-Yang Teng, Jiun-Chuan Lin, and Jr-Chuang Huang
Earth Surf. Dynam., 11, 475–486, https://doi.org/10.5194/esurf-11-475-2023, https://doi.org/10.5194/esurf-11-475-2023, 2023
Short summary
Short summary
Observations of the interaction between extreme physical erosion and chemical weathering dynamics are limited. We presented major elements of stream water in the badland catchment at 3 h intervals during a 3 d typhoon. The excess sodium in the evaporite deposits causes material dispersion through deflocculation, which enhances the suspended sediment flux. Moreover, we observed a shift from predominantly evaporite weathering at peak precipitation to silicate weathering at peak discharge.
Odin Marc, Jens M. Turowski, and Patrick Meunier
Earth Surf. Dynam., 9, 995–1011, https://doi.org/10.5194/esurf-9-995-2021, https://doi.org/10.5194/esurf-9-995-2021, 2021
Short summary
Short summary
The size of grains delivered to rivers is an essential parameter for understanding erosion and sediment transport and their related hazards. In mountains, landslides deliver these rock fragments, but few studies have analyzed the landslide properties that control the resulting sizes. We present measurements on 17 landslides from Taiwan and show that their grain sizes depend on rock strength, landslide depth and drop height, thereby validating and updating a previous theory on fragmentation.
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
Short summary
Short summary
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.
Mitch K. D'Arcy, Taylor F. Schildgen, Jens M. Turowski, and Pedro DiNezio
Earth Surf. Dynam., 7, 755–771, https://doi.org/10.5194/esurf-7-755-2019, https://doi.org/10.5194/esurf-7-755-2019, 2019
Short summary
Short summary
The age of formation of sedimentary deposits is often interpreted to record information about past environmental changes. Here, we show that the timing of abandonment of surfaces also provides valuable information. We derive a new set of equations that can be used to estimate when a sedimentary surface was abandoned based on what is known about its activity from surface dating. Estimates of abandonment age can benefit a variety of geomorphic analyses, which we illustrate with a case study.
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
Short summary
Short summary
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.
Anne Schöpa, Wei-An Chao, Bradley P. Lipovsky, Niels Hovius, Robert S. White, Robert G. Green, and Jens M. Turowski
Earth Surf. Dynam., 6, 467–485, https://doi.org/10.5194/esurf-6-467-2018, https://doi.org/10.5194/esurf-6-467-2018, 2018
Short summary
Short summary
On 21 July 2014, a voluminous landslide entered the caldera lake at Askja, Iceland, and created tsunami waves inundating famous tourist spots. The high hazard potential of the site motivated our study in which we analysed seismic data and found a precursory tremor signal intensifying in the 30 min before the landslide. Our paper shows the potential of seismic monitoring techniques to detect precursory activity before a big landslide that could be used for an early-warning system.
Michael Dietze, Jens M. Turowski, Kristen L. Cook, and Niels Hovius
Earth Surf. Dynam., 5, 757–779, https://doi.org/10.5194/esurf-5-757-2017, https://doi.org/10.5194/esurf-5-757-2017, 2017
Short summary
Short summary
Rockfall is an essential geomorphic process and a hazard in steep landscapes which is hard to constrain with traditional approaches. Seismic methods allow for the detection, location, characterisation and linking of events to triggers by lag times. This new technique reveals 49 rockfalls in 6 months with seasonally varying locations. Freeze–thaw action accounts for only 5 events, whereas 19 rockfalls were caused by rain with a 1 h peak lag time, and 17 events were due to diurnal thermal forcing.
Albrecht von Boetticher, Jens M. Turowski, Brian W. McArdell, Dieter Rickenmann, Marcel Hürlimann, Christian Scheidl, and James W. Kirchner
Geosci. Model Dev., 10, 3963–3978, https://doi.org/10.5194/gmd-10-3963-2017, https://doi.org/10.5194/gmd-10-3963-2017, 2017
Short summary
Short summary
The open-source fluid dynamic solver presented in v. Boetticher et al. (2016) combines a Coulomb viscosplastic rheological model with a Herschel–Bulkley model based on material properties for 3-D debris flow simulations. Here, we validate the solver and illustrate the model sensitivity to water content, channel curvature, content of fine material and channel bed roughness. We simulate both laboratory-scale and large-scale debris-flow experiments, using only one of the two calibration parameters.
Michael Dietze, Solmaz Mohadjer, Jens M. Turowski, Todd A. Ehlers, and Niels Hovius
Earth Surf. Dynam., 5, 653–668, https://doi.org/10.5194/esurf-5-653-2017, https://doi.org/10.5194/esurf-5-653-2017, 2017
Short summary
Short summary
We use a seismometer network to detect and locate rockfalls, a key process shaping steep mountain landscapes. When tested against laser scan surveys, all seismically detected events could be located with an average deviation of 81 m. Seismic monitoring provides insight to the dynamics of individual rockfalls, which can be as small as 0.0053 m3. Thus, seismic methods provide unprecedented temporal, spatial and kinematic details about this important process.
Antonius Golly and Jens M. Turowski
Earth Surf. Dynam., 5, 557–570, https://doi.org/10.5194/esurf-5-557-2017, https://doi.org/10.5194/esurf-5-557-2017, 2017
Short summary
Short summary
Researchers of fluvial geomorphology require reliable information on channel width and its change in space and time. For example, to study bank erosion rates we need the local position of channel banks before and after a high flood event. Although deriving these metrics seems simple, researchers often use manual or arbitrary approaches that are not objective and reproducible. Here, we present an open-source software tool
cmgo(R package) that meets the requirements of academic research.
Fabian Walter, Arnaud Burtin, Brian W. McArdell, Niels Hovius, Bianca Weder, and Jens M. Turowski
Nat. Hazards Earth Syst. Sci., 17, 939–955, https://doi.org/10.5194/nhess-17-939-2017, https://doi.org/10.5194/nhess-17-939-2017, 2017
Short summary
Short summary
Debris flows are naturally occuring mass motion events, which mobilize loose material in steep Alpine torrents. The destructive potential of debris flows is well known and demands early warning. Here we apply the amplitude source location (ASL) method to seismic ground vibrations induced by a debris flow event in Switzerland. The method efficiently detects the initiation of the event and traces its front propagation down the torrent channel.
Jens M. Turowski and Rebecca Hodge
Earth Surf. Dynam., 5, 311–330, https://doi.org/10.5194/esurf-5-311-2017, https://doi.org/10.5194/esurf-5-311-2017, 2017
Short summary
Short summary
Bedrock incision by rivers is driven by the impacts of sediment particles moved by the water flow. Sediment residing on the bed can protect the rock from impacts, thereby reducing erosion rates, a phenomenon known as the cover effect. The cover effect has been shown to be important in many field and laboratory experiments. Here, we develop a mathematical framework to describe the cover effect which can be used to compare data and to predict the extent of cover in streams.
Alexander R. Beer, James W. Kirchner, and Jens M. Turowski
Earth Surf. Dynam., 4, 885–894, https://doi.org/10.5194/esurf-4-885-2016, https://doi.org/10.5194/esurf-4-885-2016, 2016
Short summary
Short summary
Spatial bedrock erosion data from stream channels are important for engineering issues and landscape evolution model assessment. However, acquiring such data is challenging and only few data sets exist. Detecting changes in repeated photographs of painted bedrock surfaces easily allows for semi-quantitative conclusions on the spatial distribution of sediment transport and its effects: abrasion on surfaces facing the streamflow and shielding of surfaces by abundant sediment.
Albrecht von Boetticher, Jens M. Turowski, Brian W. McArdell, Dieter Rickenmann, and James W. Kirchner
Geosci. Model Dev., 9, 2909–2923, https://doi.org/10.5194/gmd-9-2909-2016, https://doi.org/10.5194/gmd-9-2909-2016, 2016
Short summary
Short summary
Debris flows are characterized by unsteady flows of water with different content of clay, silt, sand, gravel, and large particles, resulting in a dense moving mixture mass. Here we present a three-dimensional fluid dynamic solver that simulates the flow as a mixture of a pressure-dependent rheology model of the gravel mixed with a Herschel–Bulkley rheology of the fine material suspension. We link rheological parameters to the material composition. The user must specify two free model parameters.
Arnaud Burtin, Niels Hovius, and Jens M. Turowski
Earth Surf. Dynam., 4, 285–307, https://doi.org/10.5194/esurf-4-285-2016, https://doi.org/10.5194/esurf-4-285-2016, 2016
A. von Boetticher, J. M. Turowski, B. W. McArdell, D. Rickenmann, M. Hürlimann, C. Scheidl, and J. W. Kirchner
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmdd-8-6379-2015, https://doi.org/10.5194/gmdd-8-6379-2015, 2015
Preprint withdrawn
M. Jochner, J. M. Turowski, A. Badoux, M. Stoffel, and C. Rickli
Earth Surf. Dynam., 3, 311–320, https://doi.org/10.5194/esurf-3-311-2015, https://doi.org/10.5194/esurf-3-311-2015, 2015
Short summary
Short summary
The export of coarse particulate organic matter (CPOM) from mountain catchments seems to be strongly linked to rising discharge, but the mechanism leading to this is unclear. We show that log jams in a steep headwater stream are an effective barrier for CPOM export. Exceptional discharge events play a dual role: First, they destroy existing jams, releasing stored material. Second, they intensify channel--hillslope coupling, thereby recruiting logs to the channel, around which new jams can form.
A. R. Beer and J. M. Turowski
Earth Surf. Dynam., 3, 291–309, https://doi.org/10.5194/esurf-3-291-2015, https://doi.org/10.5194/esurf-3-291-2015, 2015
Short summary
Short summary
We applied a spatiotemporally highly resolved dataset of discharge, sediment transport and bedrock erosion data to assess the validity of landscape evolution models at the process scale (resolution of square meters and minutes). The tools effect is found to be the dominant driver of erosion and an easy model is able to predict measured erosion. For larger scales common discharge-dependend modeling with a discharge threshold is adequate to regive the overal trend of the erosion signal.
A. Burtin, N. Hovius, B. W. McArdell, J. M. Turowski, and J. Vergne
Earth Surf. Dynam., 2, 21–33, https://doi.org/10.5194/esurf-2-21-2014, https://doi.org/10.5194/esurf-2-21-2014, 2014
J. M. Turowski, A. Badoux, K. Bunte, C. Rickli, N. Federspiel, and M. Jochner
Earth Surf. Dynam., 1, 1–11, https://doi.org/10.5194/esurf-1-1-2013, https://doi.org/10.5194/esurf-1-1-2013, 2013
Related subject area
Physical: Geomorphology (including all aspects of fluvial, coastal, aeolian, hillslope and glacial geomorphology)
A physics-based model for fluvial valley width
Implications for the resilience of modern coastal systems derived from mesoscale barrier dynamics at Fire Island, New York
Quantifying the migration rate of drainage divides from high-resolution topographic data
Long-term monitoring (1953–2019) of geomorphologically active sections of Little Ice Age lateral moraines in the context of changing meteorological conditions
Coevolving edge rounding and shape of glacial erratics: the case of Shap granite, UK
Dimensionless argument: a narrow grain size range near 2 mm plays a special role in river sediment transport and morphodynamics
Path length and sediment transport estimation from DEMs of difference: a signal processing approach
Influence of cohesive clay on wave–current ripple dynamics captured in a 3D phase diagram
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 1: Erosion dynamics
Statistical characterization of erosion and sediment transport mechanics in shallow tidal environments – Part 2: Suspended sediment dynamics
Geomorphological and hydrological controls on sediment export in earthquake-affected catchments in the Nepal Himalaya
Optimization of passive acoustic bedload monitoring in rivers by signal inversion
Stochastic properties of coastal flooding events – Part 2: Probabilistic analysis
Field monitoring of pore water pressure in fully and partly saturated debris flows at Ohya landslide scar, Japan
Analysis of autogenic bifurcation processes resulting in river avulsion
Bedload transport fluctuations, flow conditions, and disequilibrium ratio at the Swiss Erlenbach stream: results from 27 years of high-resolution temporal measurements
Stochastic properties of coastal flooding events – Part 1: convolutional-neural-network-based semantic segmentation for water detection
Coexistence of two dune scales in a lowland river
Geomorphic risk maps for river migration using probabilistic modeling – a framework
Alpine hillslope failure in the western US: insights from the Chaos Canyon landslide, Rocky Mountain National Park, USA
Using repeat UAV-based laser scanning and multispectral imagery to explore eco-geomorphic feedbacks along a river corridor
Numerical modelling of the evolution of a river reach with a complex morphology to help define future sustainable restoration decisions
Method to evaluate large-wood behavior in terms of the convection equation associated with sediment erosion and deposition
Effects of seasonal variations in vegetation and precipitation on catchment erosion rates along a climate and ecological gradient: insights from numerical modeling
On the use of convolutional deep learning to predict shoreline change
Riverine Sediment Response to Deforestation in the Amazon Basin
On the use of packing models for the prediction of fluvial sediment porosity
Automated riverbed composition analysis using deep learning on underwater images
Marsh-induced backwater: the influence of non-fluvial sedimentation on a delta's channel morphology and kinematics
Spatial and temporal variations in rockwall erosion rates derived from cosmogenic 10Be in medial moraines at five valley glaciers around Pigne d'Arolla, Switzerland
Downstream rounding rate of pebbles in the Himalaya
Physical modeling of ice-sheet-induced salt movements using the example of northern Germany
Building a bimodal landscape: bedrock lithology and bed thickness controls on the morphology of Last Chance Canyon, New Mexico, USA
Geotechnical controls on erodibility in fluvial impact erosion
Linear-stability analysis of plane beds under flows with suspended loads
Stream hydrology controls on ice cliff generation, evolution, and survival on debris-covered glaciers
Estimating surface water availability in high mountain rock slopes using a numerical energy balance model
Sediment source and sink identification using Sentinel-2 and a small network of turbidimeters on the Vjosa River
Spatiotemporal bedload transport patterns over two-dimensional bedforms
Time-varying drainage basin development and erosion on volcanic edifices
Ice-buttressing-controlled rock slope failure on a cirque headwall, Lake District, UK
The probabilistic nature of dune collisions in 2D
Shape still matters: rockfall interactions with trees and deadwood in a mountain forest uncover a new facet of rock shape dependency
Earthquake contributions to coastal cliff retreat
Morphologic and morphometric differences between gullies formed in different substrates on Mars: new insights into the gully formation processes
Testing the sensitivity of the CAESAR-Lisflood landscape evolution model to grid cell size
Development of a machine learning model for river bed load
Modeling the spatially distributed nature of subglacial sediment transport and erosion
Confinement width and inflow-to-sediment discharge ratio control the morphology and braiding intensity of submarine channels: insights from physical experiments and reduced-complexity models
The influence of dune lee side shape on time-averaged velocities and turbulence
Jens Martin Turowski, Aaron Bufe, and Stefanie Tofelde
Earth Surf. Dynam., 12, 493–514, https://doi.org/10.5194/esurf-12-493-2024, https://doi.org/10.5194/esurf-12-493-2024, 2024
Short summary
Short summary
Fluvial valleys are ubiquitous landforms, and understanding their formation and evolution affects a wide range of disciplines from archaeology and geology to fish biology. Here, we develop a model to predict the width of fluvial valleys for a wide range of geographic conditions. In the model, fluvial valley width is controlled by the two competing factors of lateral channel mobility and uplift. The model complies with available data and yields a broad range of quantitative predictions.
Daniel J. Ciarletta, Jennifer L. Miselis, Julie C. Bernier, and Arnell S. Forde
Earth Surf. Dynam., 12, 449–475, https://doi.org/10.5194/esurf-12-449-2024, https://doi.org/10.5194/esurf-12-449-2024, 2024
Short summary
Short summary
We reconstructed the evolution of Fire Island, a barrier island in New York, USA, to identify drivers of landscape change. Results reveal Fire Island was once divided into multiple inlet-separated islands with distinct features. Later, inlets closed, and Fire Island’s landscape became more uniform as human activities intensified. The island is now less mobile and less likely to resist and recover from storm impacts and sea level rise. This vulnerability may exist for other stabilized barriers.
Chao Zhou, Xibin Tan, Yiduo Liu, and Feng Shi
Earth Surf. Dynam., 12, 433–448, https://doi.org/10.5194/esurf-12-433-2024, https://doi.org/10.5194/esurf-12-433-2024, 2024
Short summary
Short summary
The drainage-divide stability provides new insights into both the river network evolution and the tectonic and/or climatic changes. Several methods have been proposed to determine the direction of drainage-divide migration. However, how to quantify the migration rate of drainage divides remains challenging. In this paper, we propose a new method to calculate the migration rate of drainage divides from high-resolution topographic data.
Moritz Altmann, Madlene Pfeiffer, Florian Haas, Jakob Rom, Fabian Fleischer, Tobias Heckmann, Livia Piermattei, Michael Wimmer, Lukas Braun, Manuel Stark, Sarah Betz-Nutz, and Michael Becht
Earth Surf. Dynam., 12, 399–431, https://doi.org/10.5194/esurf-12-399-2024, https://doi.org/10.5194/esurf-12-399-2024, 2024
Short summary
Short summary
We show a long-term erosion monitoring of several sections on Little Ice Age lateral moraines with derived sediment yield from historical and current digital elevation modelling (DEM)-based differences. The first study period shows a clearly higher range of variability of sediment yield within the sites than the later periods. In most cases, a decreasing trend of geomorphic activity was observed.
Paul A. Carling
Earth Surf. Dynam., 12, 381–397, https://doi.org/10.5194/esurf-12-381-2024, https://doi.org/10.5194/esurf-12-381-2024, 2024
Short summary
Short summary
Edge rounding in Shap granite glacial erratics is an irregular function of distance from the source outcrop in northern England, UK. Block shape is conservative, evolving according to block fracture mechanics – stochastic and silver ratio models – towards either of two attractor states. Progressive reduction in size occurs for blocks transported at the sole of the ice mass where the blocks are subject to compressive and tensile forces of the ice acting against a bedrock or till surface.
Gary Parker, Chenge An, Michael P. Lamb, Marcelo H. Garcia, Elizabeth H. Dingle, and Jeremy G. Venditti
Earth Surf. Dynam., 12, 367–380, https://doi.org/10.5194/esurf-12-367-2024, https://doi.org/10.5194/esurf-12-367-2024, 2024
Short summary
Short summary
River morphology has traditionally been divided by the size 2 mm. We use dimensionless arguments to show that particles in the 1–5 mm range (i) are the finest range not easily suspended by alluvial flood flows, (ii) are transported preferentially over coarser gravel, and (iii), within limits, are also transported preferentially over sand. We show how fluid viscosity mediates the special status of sediment in this range.
Lindsay Marie Capito, Enrico Pandrin, Walter Bertoldi, Nicola Surian, and Simone Bizzi
Earth Surf. Dynam., 12, 321–345, https://doi.org/10.5194/esurf-12-321-2024, https://doi.org/10.5194/esurf-12-321-2024, 2024
Short summary
Short summary
We propose that the pattern of erosion and deposition from repeat topographic surveys can be a proxy for path length in gravel-bed rivers. With laboratory and field data, we applied tools from signal processing to quantify this periodicity and used these path length estimates to calculate sediment transport using the morphological method. Our results highlight the potential to expand the use of the morphological method using only remotely sensed data as well as its limitations.
Xuxu Wu, Jonathan Malarkey, Roberto Fernández, Jaco H. Baas, Ellen Pollard, and Daniel R. Parsons
Earth Surf. Dynam., 12, 231–247, https://doi.org/10.5194/esurf-12-231-2024, https://doi.org/10.5194/esurf-12-231-2024, 2024
Short summary
Short summary
The seabed changes from flat to rippled in response to the frictional influence of waves and currents. This experimental study has shown that the speed of this change, the size of ripples that result and even whether ripples appear also depend on the amount of sticky mud present. This new classification on the basis of initial mud content should lead to improvements in models of seabed change in present environments by engineers and the interpretation of past environments by geologists.
Andrea D'Alpaos, Davide Tognin, Laura Tommasini, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 181–199, https://doi.org/10.5194/esurf-12-181-2024, https://doi.org/10.5194/esurf-12-181-2024, 2024
Short summary
Short summary
Sediment erosion induced by wind waves is one of the main drivers of the morphological evolution of shallow tidal environments. However, a reliable description of erosion events for the long-term morphodynamic modelling of tidal systems is still lacking. By statistically characterizing sediment erosion dynamics in the Venice Lagoon over the last 4 centuries, we set up a novel framework for a synthetic, yet reliable, description of erosion events in tidal systems.
Davide Tognin, Andrea D'Alpaos, Luigi D'Alpaos, Andrea Rinaldo, and Luca Carniello
Earth Surf. Dynam., 12, 201–218, https://doi.org/10.5194/esurf-12-201-2024, https://doi.org/10.5194/esurf-12-201-2024, 2024
Short summary
Short summary
Reliable quantification of sediment transport processes is necessary to understand the fate of shallow tidal environments. Here we present a framework for the description of suspended sediment dynamics to quantify deposition in the long-term modelling of shallow tidal systems. This characterization, together with that of erosion events, allows one to set up synthetic, yet reliable, models for the long-term evolution of tidal landscapes.
Emma L. S. Graf, Hugh D. Sinclair, Mikaël Attal, Boris Gailleton, Basanta Raj Adhikari, and Bishnu Raj Baral
Earth Surf. Dynam., 12, 135–161, https://doi.org/10.5194/esurf-12-135-2024, https://doi.org/10.5194/esurf-12-135-2024, 2024
Short summary
Short summary
Using satellite images, we show that, unlike other examples of earthquake-affected rivers, the rivers of central Nepal experienced little increase in sedimentation following the 2015 Gorkha earthquake. Instead, a catastrophic flood occurred in 2021 that buried towns and agricultural land under up to 10 m of sediment. We show that intense storms remobilised glacial sediment from high elevations causing much a greater impact than flushing of earthquake-induced landslides.
Mohamad Nasr, Adele Johannot, Thomas Geay, Sebastien Zanker, Jules Le Guern, and Alain Recking
Earth Surf. Dynam., 12, 117–134, https://doi.org/10.5194/esurf-12-117-2024, https://doi.org/10.5194/esurf-12-117-2024, 2024
Short summary
Short summary
Hydrophones are used to monitor sediment transport in the river by listening to the acoustic noise generated by particle impacts on the riverbed. However, this acoustic noise is modified by the river flow and can cause misleading information about sediment transport. This article proposes a model that corrects the measured acoustic signal. Testing the model showed that the corrected signal is better correlated with bedload flux in the river.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 105–115, https://doi.org/10.5194/esurf-12-105-2024, https://doi.org/10.5194/esurf-12-105-2024, 2024
Short summary
Short summary
We provide a detailed characterization of the frequency, intensity and duration of flooding events at a site along the Texas coast. Our analysis demonstrates the suitability of relatively simple wave run-up models to estimate the frequency and intensity of coastal flooding. Our results validate and expand a probabilistic model of coastal flooding driven by wave run-up that can then be used in coastal risk management in response to sea level rise.
Shunsuke Oya, Fumitoshi Imaizumi, and Shoki Takayama
Earth Surf. Dynam., 12, 67–86, https://doi.org/10.5194/esurf-12-67-2024, https://doi.org/10.5194/esurf-12-67-2024, 2024
Short summary
Short summary
The monitoring of pore water pressure in fully and partly saturated debris flows was performed at Ohya landslide scar, central Japan. The pore water pressure in some partly saturated flows greatly exceeded the hydrostatic pressure. The depth gradient of the pore water pressure in the lower part of the flow was generally higher than the upper part of the flow. We conclude that excess pore water pressure is present in many debris flow surges and is an important mechanism in debris flow behavior.
Gabriele Barile, Marco Redolfi, and Marco Tubino
Earth Surf. Dynam., 12, 87–103, https://doi.org/10.5194/esurf-12-87-2024, https://doi.org/10.5194/esurf-12-87-2024, 2024
Short summary
Short summary
River bifurcations often show the closure of one branch (avulsion), whose causes are still poorly understood. Our model shows that when one branch stops transporting sediments, the other considerably erodes and captures much more flow, resulting in a self-sustaining process. This phenomenon intensifies when increasing the length of the branches, eventually leading to branch closure. This work may help to understand when avulsions occur and thus to design sustainable river restoration projects.
Dieter Rickenmann
Earth Surf. Dynam., 12, 11–34, https://doi.org/10.5194/esurf-12-11-2024, https://doi.org/10.5194/esurf-12-11-2024, 2024
Short summary
Short summary
Field measurements of the bedload flux with a high temporal resolution in a steep mountain stream were used to analyse the transport fluctuations as a function of the flow conditions. The disequilibrium ratio, a proxy for the solid particle concentration in the flow, was found to influence the sediment transport behaviour, and above-average disequilibrium conditions – associated with a larger sediment availability on the streambed – substantially affect subsequent transport conditions.
Byungho Kang, Rusty A. Feagin, Thomas Huff, and Orencio Durán Vinent
Earth Surf. Dynam., 12, 1–10, https://doi.org/10.5194/esurf-12-1-2024, https://doi.org/10.5194/esurf-12-1-2024, 2024
Short summary
Short summary
Coastal flooding can cause significant damage to coastal ecosystems, infrastructure, and communities and is expected to increase in frequency with the acceleration of sea level rise. In order to respond to it, it is crucial to measure and model their frequency and intensity. Here, we show deep-learning techniques can be successfully used to automatically detect flooding events from complex coastal imagery, opening the way to real-time monitoring and data acquisition for model development.
Judith Y. Zomer, Bart Vermeulen, and Antonius J. F. Hoitink
Earth Surf. Dynam., 11, 1283–1298, https://doi.org/10.5194/esurf-11-1283-2023, https://doi.org/10.5194/esurf-11-1283-2023, 2023
Short summary
Short summary
Secondary bedforms that are superimposed on large, primary dunes likely play a large role in fluvial systems. This study demonstrates that they can be omnipresent. Especially during peak flows, they grow large and can have steep slopes, likely affecting flood risk and sediment transport dynamics. Primary dune morphology determines whether they continuously or intermittently migrate. During discharge peaks, the secondary bedforms can become the dominant dune scale.
Brayden Noh, Omar Wani, Kieran B. J. Dunne, and Michael P. Lamb
EGUsphere, https://doi.org/10.5194/egusphere-2023-2190, https://doi.org/10.5194/egusphere-2023-2190, 2023
Short summary
Short summary
In this manuscript, we propose a methodology to generate risk maps that provide the probabilities of erosion due to river migration. This methodology uses concepts from probability theory to learn the parameter values of the river migration model from satellite data while taking into account parameter uncertainty. Our analysis shows that such geomorphic risk estimation is more reliable than models that don't explicitly consider various sources of variability and uncertainty.
Matthew C. Morriss, Benjamin Lehmann, Benjamin Campforts, George Brencher, Brianna Rick, Leif S. Anderson, Alexander L. Handwerger, Irina Overeem, and Jeffrey Moore
Earth Surf. Dynam., 11, 1251–1274, https://doi.org/10.5194/esurf-11-1251-2023, https://doi.org/10.5194/esurf-11-1251-2023, 2023
Short summary
Short summary
In this paper, we investigate the 28 June 2022 collapse of the Chaos Canyon landslide in Rocky Mountain National Park, Colorado, USA. We find that the landslide was moving prior to its collapse and took place at peak spring snowmelt; temperature modeling indicates the potential presence of permafrost. We hypothesize that this landslide could be part of the broader landscape evolution changes to alpine terrain caused by a warming climate, leading to thawing alpine permafrost.
Christopher Tomsett and Julian Leyland
Earth Surf. Dynam., 11, 1223–1249, https://doi.org/10.5194/esurf-11-1223-2023, https://doi.org/10.5194/esurf-11-1223-2023, 2023
Short summary
Short summary
Vegetation influences how rivers change through time, yet the way in which we analyse vegetation is limited. Current methods collect detailed data at the individual plant level or determine dominant vegetation types across larger areas. Herein, we use UAVs to collect detailed vegetation datasets for a 1 km length of river and link vegetation properties to channel evolution occurring within the study site, providing a new method for investigating the influence of vegetation on river systems.
Rabab Yassine, Ludovic Cassan, Hélène Roux, Olivier Frysou, and François Pérès
Earth Surf. Dynam., 11, 1199–1221, https://doi.org/10.5194/esurf-11-1199-2023, https://doi.org/10.5194/esurf-11-1199-2023, 2023
Short summary
Short summary
Predicting river morphology evolution is very complicated, especially for mountain rivers with complex morphologies such as the Lac des Gaves reach in France. A 2D hydromorphological model was developed to reproduce the channel's evolution and provide reliable volumetric predictions while revealing the challenge of choosing adapted sediment transport and friction laws. Our model can provide decision-makers with reliable predictions to design suitable restoration measures for this reach.
Daisuke Harada and Shinji Egashira
Earth Surf. Dynam., 11, 1183–1197, https://doi.org/10.5194/esurf-11-1183-2023, https://doi.org/10.5194/esurf-11-1183-2023, 2023
Short summary
Short summary
This paper proposes a method for describing large-wood behavior in terms of the convection equation and the storage equation, which are associated with active sediment erosion and deposition. Compared to the existing Lagrangian method, the proposed method can easily simulate the behavior of large wood in the flow field with active sediment transport. The method is applied to the flood disaster in the Akatani River in 2017, and the 2-D flood flow computations are successfully performed.
Hemanti Sharma and Todd A. Ehlers
Earth Surf. Dynam., 11, 1161–1181, https://doi.org/10.5194/esurf-11-1161-2023, https://doi.org/10.5194/esurf-11-1161-2023, 2023
Short summary
Short summary
Seasonality in precipitation (P) and vegetation (V) influences catchment erosion (E), although which factor plays the dominant role is unclear. In this study, we performed a sensitivity analysis of E to P–V seasonality through numerical modeling. Our results suggest that P variations strongly influence seasonal variations in E, while the effect of seasonal V variations is secondary but significant. This is more pronounced in moderate and least pronounced in extreme environmental settings.
Eduardo Gomez-de la Peña, Giovanni Coco, Colin Whittaker, and Jennifer Montaño
Earth Surf. Dynam., 11, 1145–1160, https://doi.org/10.5194/esurf-11-1145-2023, https://doi.org/10.5194/esurf-11-1145-2023, 2023
Short summary
Short summary
Predicting how shorelines change over time is a major challenge in coastal research. We here have turned to deep learning (DL), a data-driven modelling approach, to predict the movement of shorelines using observations from a camera system in New Zealand. The DL models here implemented succeeded in capturing the variability and distribution of the observed shoreline data. Overall, these findings indicate that DL has the potential to enhance the accuracy of current shoreline change predictions.
Anuska Narayanan, Sagy Cohen, and John Robert Gardner
EGUsphere, https://doi.org/10.5194/egusphere-2023-2271, https://doi.org/10.5194/egusphere-2023-2271, 2023
Short summary
Short summary
This study investigates Amazon deforestation's profound impact on sediment dynamics. Novel remote sensing data and statistical analyses reveal significant changes, especially in heavily deforested regions, with rapid effects within a year. In less disturbed areas, a 1- to 2-year lag occurs, influenced by natural sediment shifts and human activities. These findings highlight the need to understand human activities' consequences for our planet's future.
Christoph Rettinger, Mina Tabesh, Ulrich Rüde, Stefan Vollmer, and Roy M. Frings
Earth Surf. Dynam., 11, 1097–1115, https://doi.org/10.5194/esurf-11-1097-2023, https://doi.org/10.5194/esurf-11-1097-2023, 2023
Short summary
Short summary
Packing models promise efficient and accurate porosity predictions of fluvial sediment deposits. In this study, three packing models were reviewed, calibrated, and validated. Only two of the models were able to handle the continuous and large grain size distributions typically encountered in rivers. We showed that an extension by a cohesion model is necessary and developed guidelines for successful predictions in different rivers.
Alexander A. Ermilov, Gergely Benkő, and Sándor Baranya
Earth Surf. Dynam., 11, 1061–1095, https://doi.org/10.5194/esurf-11-1061-2023, https://doi.org/10.5194/esurf-11-1061-2023, 2023
Short summary
Short summary
A novel, artificial-intelligence-based riverbed sediment analysis methodology is introduced that uses underwater images to identify the characteristic sediment classes. The main novelties of the procedure are as follows: underwater images are used, the method enables continuous mapping of the riverbed along the measurement vessel’s route contrary to conventional techniques, the method is cost-efficient, and the method works without scaling.
Kelly M. Sanks, John B. Shaw, Samuel M. Zapp, José Silvestre, Ripul Dutt, and Kyle M. Straub
Earth Surf. Dynam., 11, 1035–1060, https://doi.org/10.5194/esurf-11-1035-2023, https://doi.org/10.5194/esurf-11-1035-2023, 2023
Short summary
Short summary
River deltas encompass many depositional environments (like channels and wetlands) that interact to produce coastal environments that change through time. The processes leading to sedimentation in wetlands are often neglected from physical delta models. We show that wetland sedimentation constrains flow to the channels, changes sedimentation rates, and produces channels more akin to field-scale deltas. These results have implications for the management of these vulnerable coastal landscapes.
Katharina Wetterauer and Dirk Scherler
Earth Surf. Dynam., 11, 1013–1033, https://doi.org/10.5194/esurf-11-1013-2023, https://doi.org/10.5194/esurf-11-1013-2023, 2023
Short summary
Short summary
In glacial landscapes, debris supply rates vary spatially and temporally. Rockwall erosion rates derived from cosmogenic 10Be concentrations in medial moraine debris at five Swiss glaciers around Pigne d'Arolla indicate an increase in erosion from the end of the Little Ice Age towards deglaciation but temporally more stable rates over the last ∼100 years. Rockwall erosion rates are higher where rockwalls are steep and north-facing, suggesting a potential slope and temperature control.
Prakash Pokhrel, Mikael Attal, Hugh D. Sinclair, Simon M. Mudd, and Mark Naylor
EGUsphere, https://doi.org/10.5194/egusphere-2023-2157, https://doi.org/10.5194/egusphere-2023-2157, 2023
Short summary
Short summary
Pebbles become increasingly rounded during downstream transport in rivers due to abrasion. This study quantifies pebble roundness along the length of two Himalayan rivers. We demonstrate that roundness increases with downstream distance and that the rates are dependent on rock type. We apply this to reconstructing travel distances, and hence size of ancient Himalayan. Results show that the ancient river network was larger than the modern indicating that there has been river capture.
Jacob Hardt, Tim Dooley, and Michael Hudec
EGUsphere, https://doi.org/10.5194/egusphere-2023-2104, https://doi.org/10.5194/egusphere-2023-2104, 2023
Short summary
Short summary
Subsurface salt structures may play an important role in the energy transition, e.g., as energy storage. Thus, it is important to understand all processes that affect their stability. We investigate into the reaction of salt structures on ice sheet transgressions. We used series of sandbox models that enabled us to experiment with scaled-down versions of salt bodies from northern Germany. The strongest reactions occurred when large salt pillows were partly covered by the ice load.
Sam Anderson, Nicole Gasparini, and Joel Johnson
Earth Surf. Dynam., 11, 995–1011, https://doi.org/10.5194/esurf-11-995-2023, https://doi.org/10.5194/esurf-11-995-2023, 2023
Short summary
Short summary
We measured rock strength and amount of fracturing in the two different rock types, sandstones and carbonates, in Last Chance Canyon, New Mexico, USA. Where there is more carbonate bedrock, hills and channels steepen in Last Chance Canyon. This is because the carbonate-type bedrock tends to be more thickly bedded, is less fractured, and is stronger. The carbonate bedrock produces larger boulders than the sandstone bedrock, which can protect the more fractured sandstone bedrock from erosion.
Jens M. Turowski, Gunnar Pruß, Anne Voigtländer, Andreas Ludwig, Angela Landgraf, Florian Kober, and Audrey Bonnelye
Earth Surf. Dynam., 11, 979–994, https://doi.org/10.5194/esurf-11-979-2023, https://doi.org/10.5194/esurf-11-979-2023, 2023
Short summary
Short summary
Rivers can cut into rocks, and their strength modulates the river's erosion rates. Yet, which properties of the rock control its response to erosive action is poorly understood. Here, we describe parallel experiments to measure rock erosion rates under fluvial impact erosion and the rock's geotechnical properties such as fracture strength, elasticity, and density. Erosion rates vary over a factor of a million between different rock types. We use the data to improve current theory.
Koji Ohata, Hajime Naruse, and Norihiro Izumi
Earth Surf. Dynam., 11, 961–977, https://doi.org/10.5194/esurf-11-961-2023, https://doi.org/10.5194/esurf-11-961-2023, 2023
Short summary
Short summary
We investigated the influence of sediment transport modes on the formation of bedforms using theoretical analysis. The results of the theoretical analysis were verified with published data of plane beds obtained by fieldwork and laboratory experiments. We found that suspended sand particles can promote the formation of plane beds on a fine-grained bed, which suggests that the presence of suspended particles suppresses the development of dunes under submarine sediment-laden gravity currents.
Eric Petersen, Regine Hock, and Michael G. Loso
EGUsphere, https://doi.org/10.5194/egusphere-2023-1913, https://doi.org/10.5194/egusphere-2023-1913, 2023
Short summary
Short summary
Ice cliffs are melt hot spots that increase melt rates on debris-covered glaciers which otherwise see a reduction in melt rates. In this study, we show how surface runoff streams contribute to the generation, evolution, and survival of ice cliffs by carving into the glacier and transporting rocky debris. On Kennicott Glacier, Alaska, 31.4 % of streams are actively influenced by streams, while nearly half are within 10 m of streams.
Matan Ben-Asher, Florence Magnin, Sebastian Westermann, Josué Bock, Emmanuel Malet, Johan Berthet, Ludovic Ravanel, and Philip Deline
Earth Surf. Dynam., 11, 899–915, https://doi.org/10.5194/esurf-11-899-2023, https://doi.org/10.5194/esurf-11-899-2023, 2023
Short summary
Short summary
Quantitative knowledge of water availability on high mountain rock slopes is very limited. We use a numerical model and field measurements to estimate the water balance at a steep rock wall site. We show that snowmelt is the main source of water at elevations >3600 m and that snowpack hydrology and sublimation are key factors. The new information presented here can be used to improve the understanding of thermal, hydrogeological, and mechanical processes on steep mountain rock slopes.
Jessica Droujko, Srividya Hariharan Sudha, Gabriel Singer, and Peter Molnar
Earth Surf. Dynam., 11, 881–897, https://doi.org/10.5194/esurf-11-881-2023, https://doi.org/10.5194/esurf-11-881-2023, 2023
Short summary
Short summary
We combined data from satellite images with data measured from a kayak in order to understand the propagation of fine sediment in the Vjosa River. We were able to find some storm-activated and some permanent sources of sediment. We also estimated how much fine sediment is carried into the Adriatic Sea by the Vjosa River: approximately 2.5 Mt per year, which matches previous findings. With our work, we hope to show the potential of open-access satellite images.
Kate C. P. Leary, Leah Tevis, and Mark Schmeeckle
Earth Surf. Dynam., 11, 835–847, https://doi.org/10.5194/esurf-11-835-2023, https://doi.org/10.5194/esurf-11-835-2023, 2023
Short summary
Short summary
Despite the importance of bedforms (e.g., ripples, dunes) to sediment transport, the details of sediment transport on a sub-bedform scale are poorly understood. This paper investigates sediment transport in the downstream and cross-stream directions over bedforms with straight crests. We find that the patterns of bedload transport are highly variable on the sub-bedform scale, which is important for our understanding of the evolution of bedforms with complex crest geometries.
Daniel O'Hara, Liran Goren, Roos M. J. van Wees, Benjamin Campforts, Pablo Grosse, Pierre Lahitte, Gabor Kereszturi, and Matthieu Kervyn
EGUsphere, https://doi.org/10.5194/egusphere-2023-1921, https://doi.org/10.5194/egusphere-2023-1921, 2023
Short summary
Short summary
Understanding how volcanic edifices develop drainage basins remains an unexplored aspect of landscape evolution. Using Digital Evolution Models of volcanoes with varying ages, we quantify the geometries of their edifices and associated drainage basins through time. We find that these metrics correlate with edifice age, and are thus useful indicators of a volcano’s history. We then develop a generalized model for volcano basin develop and compare our results to basin evolution in other settings.
Paul A. Carling, John D. Jansen, Teng Su, Jane Lund Andersen, and Mads Faurschou Knudsen
Earth Surf. Dynam., 11, 817–833, https://doi.org/10.5194/esurf-11-817-2023, https://doi.org/10.5194/esurf-11-817-2023, 2023
Short summary
Short summary
Many steep glaciated rock walls collapsed when the Ice Age ended. How ice supports a steep rock wall until the ice decays is poorly understood. A collapsed rock wall was surveyed in the field and numerically modelled. Cosmogenic exposure dates show it collapsed and became ice-free ca. 18 ka ago. The model showed that the rock wall failed very slowly because ice was buttressing the slope. Dating other collapsed rock walls can improve understanding of how and when the last Ice Age ended.
Paul A. Jarvis, Clement Narteau, Olivier Rozier, and Nathalie M. Vriend
Earth Surf. Dynam., 11, 803–815, https://doi.org/10.5194/esurf-11-803-2023, https://doi.org/10.5194/esurf-11-803-2023, 2023
Short summary
Short summary
Sand dune migration velocity is inversely proportional to dune size. Consequently, smaller, faster dunes can collide with larger, slower downstream dunes. Such collisions can result in either coalescence or ejection, whereby the dunes exchange mass but remain separate. Our numerical simulations show that the outcome depends probabilistically on the dune size ratio, which we describe through an empirical function. Our numerical predictions compare favourably against experimental observations.
Adrian Ringenbach, Peter Bebi, Perry Bartelt, Andreas Rigling, Marc Christen, Yves Bühler, Andreas Stoffel, and Andrin Caviezel
Earth Surf. Dynam., 11, 779–801, https://doi.org/10.5194/esurf-11-779-2023, https://doi.org/10.5194/esurf-11-779-2023, 2023
Short summary
Short summary
Swiss researchers carried out repeated rockfall experiments with rocks up to human sizes in a steep mountain forest. This study focuses mainly on the effects of the rock shape and lying deadwood. In forested areas, cubic-shaped rocks showed a longer mean runout distance than platy-shaped rocks. Deadwood especially reduced the runouts of these cubic rocks. The findings enrich standard practices in modern rockfall hazard zoning assessments and strongly urge the incorporation of rock shape effects.
Colin K. Bloom, Corinne Singeisen, Timothy Stahl, Andrew Howell, and Chris Massey
Earth Surf. Dynam., 11, 757–778, https://doi.org/10.5194/esurf-11-757-2023, https://doi.org/10.5194/esurf-11-757-2023, 2023
Short summary
Short summary
Earthquakes can cause damaging coastal cliff retreat, but we have a limited understanding of how these infrequent events influence multidecadal retreat. This makes hazard planning a challenge. In this study, we use historic aerial images to measure coastal cliff-top retreat at a site in New Zealand. We find that earthquakes account for close to half of multidecadal retreat at this site, and our results have helped us to develop tools for estimating the influence of earthquakes at other sites.
Rishitosh K. Sinha, Dwijesh Ray, Tjalling De Haas, Susan J. Conway, and Axel Noblet
Earth Surf. Dynam., 11, 713–730, https://doi.org/10.5194/esurf-11-713-2023, https://doi.org/10.5194/esurf-11-713-2023, 2023
Short summary
Short summary
Our detailed investigation of Martian gullies formed in different substrates in 29 craters distributed between 30°–75° S latitude suggests that they can be differentiated from one another in terms of (1) morphology and length of alcoves and (2) mean gradient of the gully fans. The comparison between the Melton ratio, alcove length, and fan gradient of Martian and terrestrial gullies suggests that Martian gullies were likely formed by terrestrial debris-flow-like processes in the past.
Christopher J. Skinner and Thomas J. Coulthard
Earth Surf. Dynam., 11, 695–711, https://doi.org/10.5194/esurf-11-695-2023, https://doi.org/10.5194/esurf-11-695-2023, 2023
Short summary
Short summary
Landscape evolution models allow us to simulate the way the Earth's surface is shaped and help us to understand relevant processes, in turn helping us to manage landscapes better. The models typically represent the land surface using a grid of square cells of equal size, averaging heights in those squares. This study shows that the size chosen by the modeller for these grid cells is important, with larger sizes making sediment output events larger but less frequent.
Hossein Hosseiny, Claire C. Masteller, Jedidiah E. Dale, and Colin B. Phillips
Earth Surf. Dynam., 11, 681–693, https://doi.org/10.5194/esurf-11-681-2023, https://doi.org/10.5194/esurf-11-681-2023, 2023
Short summary
Short summary
It is of great importance to engineers and geomorphologists to predict the rate of bed load in rivers. In this contribution, we used a large dataset of measured data and developed an artificial neural network (ANN), a machine learning algorithm, for bed load prediction. The ANN model predicted the bed load flux close to measured values and better than the ones obtained from four standard bed load models with varying degrees of complexity.
Ian Delaney, Leif Anderson, and Frédéric Herman
Earth Surf. Dynam., 11, 663–680, https://doi.org/10.5194/esurf-11-663-2023, https://doi.org/10.5194/esurf-11-663-2023, 2023
Short summary
Short summary
This paper presents a two-dimensional subglacial sediment transport model that evolves a sediment layer in response to subglacial sediment transport conditions. The model captures sediment transport in supply- and transport-limited regimes across a glacier's bed and considers both the creation and transport of sediment. Model outputs show how the spatial distribution of sediment and water below a glacier can impact the glacier's discharge of sediment and erosion of bedrock.
Sam Y. J. Huang, Steven Y. J. Lai, Ajay B. Limaye, Brady Z. Foreman, and Chris Paola
Earth Surf. Dynam., 11, 615–632, https://doi.org/10.5194/esurf-11-615-2023, https://doi.org/10.5194/esurf-11-615-2023, 2023
Short summary
Short summary
We use experiments and a model to study the effects of confinement width and the inflow-to-sediment discharge ratio on the evolution of submarine braided channels. We find that confinement width controls most of the morphological changes. These trends are consistent for submarine braided channels both with and without confinement width effects and similar to fluvial braided rivers. Furthermore, we built a model that can simulate the flow bifurcation and confluence of submarine braided channels.
Alice Lefebvre and Julia Cisneros
Earth Surf. Dynam., 11, 575–591, https://doi.org/10.5194/esurf-11-575-2023, https://doi.org/10.5194/esurf-11-575-2023, 2023
Short summary
Short summary
Underwater dunes are found in various environments with strong hydrodynamics and sandy sediment. Using a numerical model, we investigated how the dune shape influences flow velocity and turbulence. We propose a classification with three types of dunes, depending on their mean lee side angles (low-angle dunes, intermediate-angle dunes and high-angle dunes). We discuss the implications of this classification on the interaction between dune morphology, flow and sediment transport.
Cited articles
Auel, C., Albayrak, I., Sumi, T., and Boes, R. M.: Sediment transport in
high-speed flows over a fixed bed: 2. Particle impacts and abrasion
prediction, Earth Surf. Proc. Land., 42, 1384–1396,
https://doi.org/10.1002/esp.4132, 2017.
Barbour, J. R.: The origin and significance of sinuosity along incising
bedrock rivers, Doctoral thesis, Columbia University, 187 pp., 2008.
Barry, J. J., Buffington, J. M., and King, J. G.: A general power equation
for predicting bed load transport rates in gravel bed rivers, Water Resour.
Res., 40, W10401, https://doi.org/10.1029/2004WR003190, 2004.
Beer, A. R. and Turowski, J. M.: Bedload transport controls bedrock erosion under sediment-starved conditions,
Earth Surf. Dynam., 3, 291–309, https://doi.org/10.5194/esurf-3-291-2015, 2015.
Beer, A. R., Kirchner, J. W., and Turowski, J. M.: Graffiti for science – erosion painting reveals spatially variable erosivity of sediment-laden flows,
Earth Surf. Dynam., 4, 885–894, https://doi.org/10.5194/esurf-4-885-2016, 2016.
Beer, A. R., Turowski, J. M., and Kirchner, J. W.: Spatial patterns of
erosion in a bedrock gorge, J. Geophys. Res.-Earth, 122, 191–214,
https://doi.org/10.1002/2016JF003850, 2017.
Buffington, J. M. and Montgomery, D. R.: A systematic analysis of eight
decades of incipient motion studies, with special reference to gravel-bedded
rivers, Water Resour. Res., 33, 1993–2029,
https://doi.org/10.1029/96WR03190, 1997.
Bunte, K., Potyondy, J. P., Abt, S. R., and Swingle, K. W.: Path of gravel
movement in a coarse stream channel, Proceedings of the Eighth Federal
Interagency Sedimentation Conference (8th FISC), 2006, Reno, NV, USA,
162–170, 2006.
Bunte, K., Abt, S. R., Potyondy, J. P., and Swingle, K. W.: A comparison of
coarse bedload transport measured with bedload traps and Helley-Smith
samplers, Geodin. Acta, 21/1-2, 53–66, https://doi.org/10.3166/ga.21.43-66,
2008.
Chatanantavet, P. and Parker, G.: Experimental study of bedrock channel
alluviation under varied sediment supply and hydraulic conditions, Water
Resour. Res., 44, W12446, https://doi.org/10.1029/2007WR006581, 2008.
Chatanantavet, P. and Parker, G.: Physically based modeling of bedrock
incision by abrasion, plucking, and macroabrasion, J. Geophys. Res.-Earth, 114, F04018, https://doi.org/10.1029/2008JF001044, 2009.
Cook, K. L., Turowski, J. M., and Hovius, N.: A demonstration of the
importance of bedload transport for fluvial bedrock erosion and knickpoint
propagation, Earth Surf. Proc. Land., 38, 683–695,
https://doi.org/10.1002/esp.3313, 2013.
Cook, K. L., Turowski, J. M., and Hovius, N.: River gorge eradication by
downstream sweep erosion, Nat. Geosci., 7, 682–686,
https://doi.org/10.1038/ngeo2224, 2014.
Davis, W. M.: The topographic maps of the United States Geological Survey,
Science, 21, 225–227, 1893.
Deal, E.: Process independent influence of climatic variability, Chap. 5,
in: A probabilistic approach to understanding the influence of rainfall on
landscape evolution, Doctoral thesis, Université Grenoble Alpes, 109–118, 2017.
DiBiase, R. A. and Whipple, K. X.: The influence of erosion thresholds and
runoff variability on the relationships among topography, climate, and
erosion rate, J. Geophys. Res., 116, F04036,
https://doi.org/10.1029/2011JF002095, 2011.
DiBiase, R. A., Whipple, K. X., Heimsath, A. M., and Ouimet, W. B.: Landscape
form and millennial erosion rates in the San Gabriel Mountains, CA, Earth Planet. Sc. Lett., 289, 134–144, https://doi.org/10.1016/j.epsl.2009.10.036,
2010.
Dietrich, W. E. and Smith, J. D.: Bed load transport in a river meander,
Water Resour. Res, 20, 1355–1380, https://doi.org/10.1029/WR020i010p01355,
1984.
Dingle, E. H., Attal, M., and Sinclair, H. D.: Abrasion-set limits on
Himalayan gravel flux, Nature, 544, 471–474,
https://doi.org/10.1038/nature22039, 2017.
Diplas, P., Dancey, C. L., Celik, A. O., Valyrakis, M., Greer, K., and Akar,
T.: The role of impulse on the initiation of particle movement under
turbulent flow conditions, Science, 322, 717–720,
https://doi.org/10.1126/science.1158954, 2008.
Dunne, T. and Leopold, L. B.: Water in Environmental Planning, Freeman, New
York, 818 pp., 1978.
Duvall, A., Kirby, E., and Burbank, D. W.: Tectonic and lithologic controls
on bedrock channel profiles and processes in coastal California, J. Geophys. Res.-Earth, 109, F03002, https://doi.org/10.1029/2003JF000086, 2004.
Edwards, B. F. and Smith, D. H.: River meandering dynamics, Phys. Rev. E,
65, 046303, https://doi.org/10.1103/PhysRevE.65.046303, 2002.
Einstein, A.: Die Ursache der Mäanderbildung der Flußläufe und
des sogenannten Baerschen Gesetzes, Naturwissenschaften, 11, 223–224,
https://doi.org/10.1007/BF01510300, 1926.
Einstein, H. A.: The bed-load function for sediment transportation in open
channel flows, US Dep. Agriculture, Tech. Bull. No. 1026, 1950.
Ferguson, R.: Flow resistance equations for gravel- and boulder-bed streams,
Water Resour. Res., 43, W05427, https://doi.org/10.1029/2006WR005422,
2007.
Ferguson, R. I., Sharma, B. P., Hodge, R. A., Hardy, R. J., and Warburton,
J.: Bed load tracer mobility in a mixed bedrock/alluvial channel, J. Geophys. Res.-Earth, 122, 807–822,
https://doi.org/10.1002/2016JF003946, 2017.
Finnegan, N. J. and Balco, G.: Sediment supply, base level, braiding, and
bedrock river terrace formation: Arroyo Seco, California, USA, Geol. Soc. Am. Bull., 125, 1114–1124, https://doi.org/10.1130/B30727.1, 2013.
Finnegan, N. J., Roe, G., Montgomery, D. R., and Hallet, B.: Controls on the
channel width of rivers: Implications for modelling fluvial incision of
bedrock, Geology, 33, 229–232, https://doi.org/10.1130/G21171.1, 2005.
Finnegan, N. J., Sklar, L. S., and Fuller, T. K.: Interplay of sediment
supply, river incision, and channel morphology revealed by the transient
evolution of an experimental bedrock channel, J. Geophys. Res.-Earth,
112, F03S11, https://doi.org/10.1029/2006JF000569, 2007.
Flint, J. J.: Stream gradient as a function of order, magnitude, and
discharge, Water Resour. Res., 10, 969–973,
https://doi.org/10.1029/WR010i005p00969, 1974.
Fuller, T. K., Gran, K. B., Sklar, L. S., and Paola, C.: Lateral erosion in
an experimental bedrock channel: The influence of bed roughness on erosion
by bed load impacts, J. Geophys. Res.-Earth, 121, 1084–1105,
https://doi.org/10.1002/2015JF003728, 2016.
Hack, J. T.: Studies of longitudinal stream profiles in Virginia and
Maryland, USGS Prof. Pap. 294-B, 1957.
Hancock, G. S. and Anderson, R. S.: Numerical modeling of fluvial
strath-terrace formation in response to oscillating climate, Geol. Soc. Am.
Bull., 114, 1131–1142, https://doi.org/10.1130/0016-7606(2002)114<1131:NMOFST>2.0.CO;2, 2002.
Harel, M.-A., Mudd, S. M., and Attal, M.: Global analysis of the stream power
law parameters based on worldwide 10Be denudation rates, Geomorphology,
268, 184–196, https://doi.org/10.1016/j.geomorph.2016.05.035, 2016.
Hodge, R. A., Hoey, T. B., and Sklar, L. S.: Bed load transport in bedrock
rivers: The role of sediment cover in grain entrainment, translation, and
deposition, J. Geophys. Res.-Earth, 116, F04028,
https://doi.org/10.1029/2011JF002032, 2011.
Hodge, R. A., Hoey, T. B., Maniatis, G., and Leprêtre, E.: Formation and
erosion of sediment cover in an experimental bedrock-alluvial channel, Earth Surf. Proc. Land., 41, 1409–1420, https://doi.org/10.1002/esp.3924,
2016.
Howard, A. D. and Knutson, T. R.: Sufficient conditions for river
meandering: A simulation approach, Water Resour. Res., 20, 1659–1667,
https://doi.org/10.1029/WR020i011p01659, 1984.
Ikeda, S., Parker, G., and Sawai, K.: Bend theory of river meanders. Part 1.
Linear development, J. Fluid Mech., 112, 363–377, 1981.
Inoue, T., Izumi, N., Shimizu, Y., and Parker, G.: Interaction among
alluvial cover, bed roughness, and incision rate in purely bedrock and
alluvial-bedrock channel, J. Geophys. Res., 119, 2123–2146,
https://doi.org/10.1002/2014JF003133, 2014.
Inoue, T., Iwasaki, T., Parker, G., Shimizu, Y., Izumi, N., Stark, C. P.,
and Funaki, J.: Numerical simulation of effects of sediment supply on
bedrock channel morphology, J. Hydraul. Eng., 142, 04016014,
https://doi.org/10.1061/(ASCE)HY.1943-7900.0001124, 2016.
Inoue, T., Parker, G., and Stark, C. P.: Morphodynamics of a
bedrock-alluvial meander bend that incises as it migrates outward:
approximate solution of permanent form, Earth Surf. Proc. Land., 42,
1342–1354, https://doi.org/10.1002/esp.4094, 2017.
Johnson, J. P. L. and Whipple, K. X.: Evaluating the controls on shear
stress, sediment supply, alluvial cover, and channel morphology on
experimental bedrock incision rate, J. Geophys. Res.-Earth, 115,
F02018, https://doi.org/10.1029/2009JF001335, 2010.
Johnson, J. P. L., Whipple, K. X., and Sklar, L. S.: Contrasting bedrock
incision rates from snowmelt and flash floods in the Henry Mountains, Utah,
Geol. Soc. Am. Bull., 122, 1600–1615, https://doi.org/10.1130/B30126.1,
2010.
Johnson, K. N. and Finnegan, N. J.: A lithologic control on active
meandering in bedrock channels, Geol. Soc. Am. Bull., 127,
1766–1776, https://doi.org/10.1130/B31184.1, 2015.
Julien, P. Y. and Anthony, D. J.: Bed load motion and grain sorting in a
meandering stream, J. Hydraul. Res., 40, 125–133,
https://doi.org/10.1080/00221680209499855, 2002.
Kirby, E. and Whipple, K.: Quantifying differential rock-uplift rates via
stream profile analysis, Geology, 29, 415–418, 2001.
Lague, D.: Reduction of long-term bedrock incision efficiency by short-term
alluvial cover intermittency, J. Geophys. Res.-Earth, 115, F02011,
https://doi.org/10.1029/2008JF001210, 2010.
Lague, D.: The stream power river incision model: evidence, theory and
beyond, Earth Surf. Proc. Land., 39, 38–61,
https://doi.org/10.1002/esp.3462, 2014.
Lague, D., Hovius, N., and Davy, P.: Discharge, discharge variability, and
the bedrock channel profile, J. Geophys. Res.-Earth, 110, F04006,
https://doi.org/10.1029/2004JF000259, 2005.
Lavé, J. and Avouac, J. P.: Fluvial incision and tectonic uplift across
the Himalayas of central Nepal, J. Geophys. Res.-Sol. Ea., 106,
26526–26591, https://doi.org/10.1029/2001JB000359, 2001.
Leopold, L. B., Wolman, M. G., and Miller, J. P.: Fluvial processes in
Geomorphology, W. H. Freeman, San Francisco, California, 522 pp., 1964.
Limaye, A. B. S. and Lamb, M. P.: Numerical simulations of bedrock valley
evolution by meandering rivers with variable bank material, J. Geophys. Res.-Earth, 119, 927–950, https://doi.org/10.1002/2013JF002997, 2014.
Mahard, R. H.: The origin and significance of intrenched meanders, J.
Geomorph., 5, 32–44, 1942.
Meshkova, L. V., Carling, P., and Buffin-Bélanger, T.: Nomenclature,
complexity, semi-alluvial channels and sediment-flux-driven bedrock erosion,
in: Gravel Bed Rivers: Processes, Tools, Environments, edited by: Church, M., Biron, P.,
and Roy, A., JohnWiley & Sons, Chichester, Chap. 31, 424–431,
https://doi.org/10.1002/9781119952497.ch31, 2012.
Meyer-Peter, E. and Müller, R.: Formulas for bedload transport, paper
presented at 2nd meeting Int. Assoc. Hydraulic Structures Res., Stockholm,
Sweden, 26 pp., 1948.
Molnar, P.: Climate change, flooding in arid environments, and erosion
rates, Geology, 29, 1071–1074,
https://doi.org/10.1130/0091-7613(2001)029<1071:CCFIAE>2.0.CO;2, 2001.
Moore, R. C.: Origin of inclosed meanders in the physiographic history of
the Colorado Plateau country, J. Geol., 34, 29–57, 1926.
Nelson, P. A. and Seminara, G.: Modeling the evolution of bedrock channel
shape with erosion from saltating bed load, Geophys. Res. Lett., 38, L17406,
https://doi.org/10.1029/2011GL048628, 2011.
Nelson, P. A. and Seminara, G.: A theoretical framework for the
morphodynamics of bedrock channels, Geophys. Res. Lett., 39, L06408,
https://doi.org/10.1029/2011GL050806, 2012.
Nitsche, M., Rickenmann, D., Turowski, J. M., Badoux, A., and Kirchner, J.
W.: Evaluation of bedload transport predictions using flow resistance
equations to account for macro-roughness in steep mountain streams, Water
Resour. Res., 47, W08513, https://doi.org/10.1029/2011WR010645, 2011.
Nitsche, M., Rickenmann, D., Kirchner, J. W., Turowski, J. M., and Badoux,
A.: Macroroughness and variations in reach-averaged flow resistance in steep
mountain streams, Water Resour. Res., 48, W12518,
https://doi.org/10.1029/2012WR012091, 2012.
Ouimet, W. B., Whipple, K. X., and Granger, D. E.: Beyond threshold hillslopes: Channel adjustment to base-level fall in
tectonically active mountain ranges, Geology, 37, 579–582, https://doi.org/10.1130/G30013A.1, 2009.
Parker, G.: Self-formed straight rivers with equilibrium banks and mobile
bed. Part 2. The gravel river, J. Fluid Mech., 89, 127–146, 1978.
Parker, G.: Selective sorting and abrasion of river gravel. I: Theory, J. Hydraul. Eng., 117, 131–171,
https://doi.org/10.1061/(ASCE)0733-9429(1991)117:2(131), 1991.
Parker, G., Seminara, G., and Solari, L.: Bed load at low Shields stress on
arbitrarily sloping beds: Alternative entrainment formulation, Water Resour.
Res., 39, 1183, https://doi.org/10.1029/2001WR001253, 2003.
Rickenmann, D.: Comparison of bed load transport in torrent and gravel bed
streams, Water Resour. Res., 37, 3295–3305,
https://doi.org/10.1029/2001WR000319, 2001.
Roberts, G. G. and White, N.: Estimating uplift rate histories from river
profiles using African examples, J. Geophys. Res.-Sol. Ea., 115, B02406,
https://doi.org/10.1029/2009JB006692, 2010.
Rossi, M. W., Whipple, K. X., and Vivoni, E. R.: Precipitation and
evapotranspiration controls on daily runoff variability in the contiguous
United States and Puerto Rico, J. Geophys. Res.-Earth, 121, 128–145,
https://doi.org/10.1002/2015JF003446, 2016.
Schneider, J. M., Rickenmann, D., Turowski, J. M., Bunte, K., and Kirchner,
J. W.: Applicability of bed load transport models for mixed-size sediments
in steep streams considering macro-roughness, Water Resour. Res., 51,
5260–5283, https://doi.org/10.1002/2014WR016417, 2015.
Seidl, M. A., Dietrich, W. E., and Kirchner, J. W.: Longitudinal profile
development into bedrock: An analysis of Hawaiian channels, J. Geol., 102,
457–474, https://doi.org/10.1086/629686, 1994.
Seizilles, G., Lajeunesse, E., Devauchelle, O., and Bak M.: Cross-stream
diffusion in bedload transport, Phys. Fluids, 26, 013302, https://doi.org/10.1063/1.4861001, 2014.
Seminara, G.: Meanders, J. Fluid Mech., 554, 271–297, 2006.
Shepherd, R. G.: Incised river meanders: Evolution in simulated bedrock,
Science, 178, 409–411, https://doi.org/10.1126/science.178.4059.409,
1972.
Shobe, C. M., Tucker, G. E., and Barnhart, K. R.: The SPACE 1.0 model: a Landlab component for 2-D calculation of sediment
transport, bedrock erosion, and landscape evolution, Geosci. Model Dev., 10, 4577–4604, https://doi.org/10.5194/gmd-10-4577-2017, 2017.
Sklar, L. S. and Dietrich, W. E.: A mechanistic model for river incision
into bedrock by saltating bed load, Water Resour. Res., 40, W06301,
https://doi.org/10.1029/2003WR002496, 2004.
Smith, T. R.: A derivation of the hydraulic geometry of steady-state
channels from conservation principles and sediment transport laws, J. Geol.,
82, 98–103, 1974.
Smith, T. R. and Bretherton, F. P.: Stability and the conservation of mass
in drainage basin evolution, Water Resour. Res., 8, 1506–1529, 1972.
Snyder, N. P., Whipple, K. X., Tucker, G. E., and Merritts, D. J.: Channel
response to tectonic forcing: field analysis of stream morphology and
hydrology in the Mendocino triple junction region, northern California,
Geomorphology, 53, 97–127, https://doi.org/10.1016/S0169-555X(02)00349-5,
2003.
Stark, C. P.: A self-regulating model of bedrock river channel geometry,
Geophys. Res. Lett., 33, L04402, https://doi.org/10.1029/2005GL023193, 2006.
Stark, C. P., Barbour, J. R., Hayakawa, Y. S., Hattanji, T., Hovius, N.,
Chen, H., Lin, C.-W., Horng, M.-J., Xu, K.-Q., and Fukahata, Y.: The
climatic signature of incised river meanders, Science, 327, 1497–1501,
https://doi.org/10.1126/science.1184406, 2010.
Tinkler, K. J.: Active valley meanders in South-Central Texas and their
wider significance, Geol. Soc. Am. Bull., 82, 1783–1800, 1971.
Tinkler, K. J. and Wohl, E. E.: A primer on bedrock channels, in: Rivers
over rock: Fluvial processes in bedrock channels, edited by: Tinkler, K. J. and Wohl, E.
E., Geophysical Monograph Series 107, American Geophysical Union:
Washington, DC, 1–18, 1998.
Tomkin, J. H., Brandon, M. T., Pazzaglia, F. J., Barbour, J. R., and Willett, S. D.: Quantitative testing of bedrock incision models for the
Clearwater River, NW Washington State, J. Geophys. Res.-Earth, 108, 2308, https://doi.org/10.1029/2001JB000862,
2003.
Turowski, J. M.: Stochastic modeling of the cover effect and bedrock
erosion, Water Resour. Res., 45, W03422,
https://doi.org/10.1029/2008WR007262, 2009.
Turowski, J. M. and Bloem, J.-P.: The influence of sediment thickness on
energy delivery to the bed by bedload impacts, Geodin. Acta, 28, 199–208,
https://doi.org/10.1080/09853111.2015.1047195, 2016.
Turowski, J. M. and Hodge, R.: A probabilistic framework for the cover effect in bedrock erosion,
Earth Surf. Dynam., 5, 311–330, https://doi.org/10.5194/esurf-5-311-2017, 2017.
Turowski, J. M., Lague, D., and Hovius, N.: Cover effect in bedrock
abrasion: A new derivation and its implication for the modeling of bedrock
channel morphology, J. Geophys. Res.-Earth, 112, F04006,
https://doi.org/10.1029/2006JF000697, 2007.
Turowski, J. M., Hovius, N., Hsieh, M.-L., Lague, D., and Chen, M.-C.:
Distribution of erosion across bedrock channels, Earth Surf. Proc. Land., 33, 353–363, https://doi.org/10.1002/esp.1559, 2008a.
Turowski, J. M., Hovius, N., Wilson, A., and Horng, M.-J.: Hydraulic
geometry, river sediment and the definition of bedrock channels,
Geomorphology, 99, 26–38, https://doi.org/10.1016/j.geomorph.2007.10.001,
2008b.
Turowski, J. M., Lague, D., and Hovius, N.: Response of bedrock channel
width to tectonic forcing: insights from a numerical model, theoretical
considerations, and comparison with field data. J. Geophys. Res.-Earth, 114, F03016, https://doi.org/10.1029/2008JF001133, 2009.
Turowski, J. M., Rickenmann, D., and Dadson, S. J.: The partitioning of the
total sediment load of a river into suspended load and bedload: a review of
empirical data, Sedimentology, 57, 1126–1146,
https://doi.org/10.1111/j.1365-3091.2009.01140.x, 2010.
Turowski, J. M., Badoux, A., Leuzinger, J., and Hegglin, R.: Large floods,
alluvial overprint, and bedrock erosion, Earth Surf. Proc. Land., 38,
947–958, https://doi.org/10.1002/esp.3341, 2013.
Whipple, K. X.: Bedrock rivers and the geomorphology of active orogens,
Annu. Rev. Earth Pl. Sc., 32, 151–85,
https://doi.org/10.1146/annurev.earth.32.101802.120356, 2004.
Whipple, K. X., Dibiase, R. A., and Crosby, B. T.: Bedrock rivers, in:
Treatise on Geomorphology, edited by: Schroder, J. and Wohl, E., Academic Press: San
Diego, CA, 550–573, https://doi.org/10.1016/B978-0-12-374739-6.00254-2,
2013.
Whitbread, K., Jansen, J., Bishop, P., and Attal, M.: Substrate, sediment, and
slope controls on bedrock channel geometry in postglacial streams, J.
Geophys. Res., 120, 779–798, https://doi.org/10.1002/2014JF003295, 2015.
Whittaker, A. C., Cowie, P. A., Attal, M., Tucker, G. E., and Roberts, G. P.: Bedrock channel adjustment to tectonic forcing: Implications for
predicting river incision rates, Geology, 35, 103–106, https://doi.org/10.1130/G23106A.1, 2007.
Winslow, A.: The Osage River and its meanders, Science, 22, 32–32,
https://doi.org/10.1126/science.ns-22.546.31, 1893.
Wobus, C. W., Tucker, G. E., and Anderson, R. S.: Self-formed bedrock
channels, Geophys. Res. Lett., 33, L18408,
https://doi.org/10.1029/2006GL027182, 2006a.
Wobus, C., Whipple, K. X., Kirby, E., Snyder, N., Johnson, J., Spyropolou,
K., Crosby, B., and Sheehan, D.: Tectonics from topography: procedures,
promise, and pitfalls, in: Tectonics, Climate, and Landscape Evolution,
edited by: Willett, S. D., Hovius, N., Brandon, M. T., and Fisher, D., Geological
Society of America Special Paper 398, Geological Society of America:
Washington, DC, 55–74, https://doi.org/10.1130/2006.2398(04), 2006b.
Wohl, E. and David, G. C. L.: Consistency of scaling relations among
bedrock and alluvial channels, J. Geophys. Res.-Earth, 113, F04013,
https://doi.org/10.1029/2008JF000989, 2008.
Wohl, E. and Ikeda, H.: Experimental simulation of channel incision into a
cohesive substrate at varying gradients, Geology, 25, 295–298,
https://doi.org/10.1130/0091-7613(1997)025<0295:ESOCII>2.3.CO;2, 1997.
Yanites, B. J. and Tucker, G. E.: Controls and limits on bedrock channel
geometry, J. Geophys. Res.-Earth, 115, F04019,
https://doi.org/10.1029/2009jf001601, 2010.
Yanites, B. J., Tucker, G. E., Mueller, K. J., Chen, Y. G., Wilcox, T.,
Huang, S. Y., and Shi, K. W.: Incision and channel morphology across active
structures along the Peikang River, central Taiwan: implications for the
importance of channel width, Geol. Soc. Am. Bull., 122, 1192–1208,
https://doi.org/10.1130/B30035.1, 2010.
Zhang, L., Parker, G., Stark, C. P., Inoue, T., Viparelli, E., Fu, X., and Izumi, N.: Macro-roughness model of bedrock-alluvial river
morphodynamics, Earth Surf. Dynam., 3, 113–138, https://doi.org/10.5194/esurf-3-113-2015, 2015.
Short summary
Bedrock channels are a key component of mountainous landscapes. Here, a new model of the steady-state morphology, including channel width, slope and sinuosity, is derived from process physics considerations. The model compares favourably to observed scaling relations.
Bedrock channels are a key component of mountainous landscapes. Here, a new model of the...
