Articles | Volume 76, issue 3
https://doi.org/10.5194/gh-76-319-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gh-76-319-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Standard article
| 
14 Jul 2021
Standard article |
| 14 Jul 2021
| 14 Jul 2021
Assessing hillslope sediment generation potential by tree throw: a preliminary field study along a small river valley in the Jura Mountains, northwest Switzerland
Philip Greenwood
CORRESPONDING AUTHOR
Physical Geography & Environmental Change Research Group,
Department of Environmental Sciences, University of Basel,
Klingelbergstrasse 27, Basel-4056, Switzerland
Jan Bauer
Physical Geography & Environmental Change Research Group,
Department of Environmental Sciences, University of Basel,
Klingelbergstrasse 27, Basel-4056, Switzerland
Nikolaus J. Kuhn
Physical Geography & Environmental Change Research Group,
Department of Environmental Sciences, University of Basel,
Klingelbergstrasse 27, Basel-4056, Switzerland
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P. Greenwood, M. Hoelzle, and N. J. Kuhn
Geogr. Helv., 70, 311–313, https://doi.org/10.5194/gh-70-311-2015, https://doi.org/10.5194/gh-70-311-2015, 2015
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Editorial introducing the special issue of Geographica Helvetica: Mapping, Measuring and Modeling in Geomorphology.
L. Xiao, Y. Hu, P. Greenwood, and N. J. Kuhn
Geogr. Helv., 70, 167–174, https://doi.org/10.5194/gh-70-167-2015, https://doi.org/10.5194/gh-70-167-2015, 2015
P. Greenwood, S. Kuonen, W. Fister, and N. J. Kuhn
Geogr. Helv., 70, 63–73, https://doi.org/10.5194/gh-70-63-2015, https://doi.org/10.5194/gh-70-63-2015, 2015
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Alpine and mountain slopes represent important pathways that link high-altitude grazing areas to meadows and rangelands at lower elevations. Given the acute gradients associated with such environments, we hypothesize that terracettes act as efficient runoff conveyance routes that facilitate the movement of runoff and associated material during erosion events. This hypothesis was partially disproved during a series of rainfall/runoff simulations on a well-developed terracette system, however.
Nikolaus Josef Kuhn and Federica Trudu
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In many ways, the surface of the planet Mars is similar to that of Earth. However, Mars' lower gravity has an effect on the sedimentation and transport of sedimentary material and the texture of sedimentary rocks. Using specific experimental equipment to measure settling velocity aboard a parabolic flight, it was possible to observe how sediments settled at Martian gravity. These experiments serve as analogues for surface processes on Mars.
Brice Prudat, Wolfgang Fister, Lena Bloemertz, Juliane Krenz, and Nikolaus J. Kuhn
Geogr. Helv., 77, 39–51, https://doi.org/10.5194/gh-77-39-2022, https://doi.org/10.5194/gh-77-39-2022, 2022
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Soil quality depends on water availability for plants. Sandy soils with a poorly permeable layer (fragipan) are considered inept for agriculture. However they are cultivated in Namibia as they secure a minimum harvest during droughts. In order to understand the hydrological influence of fragipans in these soils, soil moisture content was measured. The results illustrate that the combination of sandy topsoil and shallow fragipan has beneficial effects on plant-available water during dry periods.
Matthias Hunziker, Olafur Arnalds, and Nikolaus J. Kuhn
SOIL, 5, 223–238, https://doi.org/10.5194/soil-5-223-2019, https://doi.org/10.5194/soil-5-223-2019, 2019
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Afforestation on severely degraded volcanic soils/landscapes is an important process concerning ecological restoration in Iceland. These landscapes have a high potential to act as carbon sinks. We tested the soil (0–30 cm) of different stages of afforested (mountain birch) landscapes and analysed the quantity and quality of the soil organic carbon. There is an increase in the total SOC stock during the encroachment. The increase is mostly because of POM SOC. Such soils demand SOC quality tests.
Wolfgang Fister, Nina Goldman, Marius Mayer, Manuel Suter, and Nikolaus J. Kuhn
Geogr. Helv., 74, 81–91, https://doi.org/10.5194/gh-74-81-2019, https://doi.org/10.5194/gh-74-81-2019, 2019
Vladimir R. Wingate, Nikolaus J. Kuhn, Stuart R. Phinn, and Cornelis van der Waal
Biogeosciences Discuss., https://doi.org/10.5194/bg-2019-28, https://doi.org/10.5194/bg-2019-28, 2019
Manuscript not accepted for further review
Brice Prudat, Lena Bloemertz, and Nikolaus J. Kuhn
SOIL, 4, 47–62, https://doi.org/10.5194/soil-4-47-2018, https://doi.org/10.5194/soil-4-47-2018, 2018
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Soil degradation is a major threat for farmers of semi-arid north-central Namibia. Having tools to assess soil quality is important to evaluate soil conditions and helps targeting important issues. We developed a soil evaluation toolbox that integrates farmers' field experiences and technical knowledge. The combination of local soil descriptions, field soil texture evaluation and soil colour provides locally meaningful information that reveals soil quality improvement potentials.
P. Greenwood, M. Hoelzle, and N. J. Kuhn
Geogr. Helv., 70, 311–313, https://doi.org/10.5194/gh-70-311-2015, https://doi.org/10.5194/gh-70-311-2015, 2015
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L. Xiao, Y. Hu, P. Greenwood, and N. J. Kuhn
Geogr. Helv., 70, 167–174, https://doi.org/10.5194/gh-70-167-2015, https://doi.org/10.5194/gh-70-167-2015, 2015
P. Greenwood, S. Kuonen, W. Fister, and N. J. Kuhn
Geogr. Helv., 70, 63–73, https://doi.org/10.5194/gh-70-63-2015, https://doi.org/10.5194/gh-70-63-2015, 2015
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Alpine and mountain slopes represent important pathways that link high-altitude grazing areas to meadows and rangelands at lower elevations. Given the acute gradients associated with such environments, we hypothesize that terracettes act as efficient runoff conveyance routes that facilitate the movement of runoff and associated material during erosion events. This hypothesis was partially disproved during a series of rainfall/runoff simulations on a well-developed terracette system, however.
Y. Hu and N. J. Kuhn
Biogeosciences, 11, 6209–6219, https://doi.org/10.5194/bg-11-6209-2014, https://doi.org/10.5194/bg-11-6209-2014, 2014
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The potential of fragipans in sustaining pearl millet during drought periods in north-central Namibia
The 1513 Monte Crenone rock avalanche: numerical model and geomorphological analysis
Evolution of fluvial environments and history of human settlements on the Ticino river alluvial plain
Schmidt hammer exposure-age dating of periglacial and glacial landforms in the Southern Swiss Alps based on R-value calibration using historical data
Assessing the ecological value of dynamic mountain geomorphosites
Glacial lake outburst flood hazard assessment by satellite Earth observation in the Himalayas (Chomolhari area, Bhutan)
Reconstruction and actual trends of landslide activities in Bruust–Haltiwald, Horw, canton of Lucerne, Switzerland
Monitoring the crisis of a rock glacier with repeated UAV surveys
Regional-scale inventory of periglacial moving landforms connected to the torrential network system
Piecing together the Lateglacial advance phases of the Reussgletscher (central Swiss Alps)
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Avalanche fatalities in the European Alps: long-term trends and statistics
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The use of a raindrop aggregate destruction device to evaluate sediment and soil organic carbon transport
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Geogr. Helv., 77, 97–119, https://doi.org/10.5194/gh-77-97-2022, https://doi.org/10.5194/gh-77-97-2022, 2022
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Heidi Megerle, Simon Martin, and Géraldine Regolini
Geogr. Helv., 77, 53–66, https://doi.org/10.5194/gh-77-53-2022, https://doi.org/10.5194/gh-77-53-2022, 2022
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Geogr. Helv., 77, 39–51, https://doi.org/10.5194/gh-77-39-2022, https://doi.org/10.5194/gh-77-39-2022, 2022
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Soil quality depends on water availability for plants. Sandy soils with a poorly permeable layer (fragipan) are considered inept for agriculture. However they are cultivated in Namibia as they secure a minimum harvest during droughts. In order to understand the hydrological influence of fragipans in these soils, soil moisture content was measured. The results illustrate that the combination of sandy topsoil and shallow fragipan has beneficial effects on plant-available water during dry periods.
Alessandro De Pedrini, Christian Ambrosi, and Cristian Scapozza
Geogr. Helv., 77, 21–37, https://doi.org/10.5194/gh-77-21-2022, https://doi.org/10.5194/gh-77-21-2022, 2022
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The Monte Crenone rock avalanche of 1513 is well known on the southern side of the Alps because in 1515 it generated the largest inundation that has occurred in Switzerland in the Common Era, the Buzza di Biasca. New geological and historical observations allowed the setup of a numerical model of this major event, permitting a better definition of the chain of consequences that affected the alluvial plain of the river Ticino from Biasca to Lake Maggiore between the 16th and the 19th century.
Dorota Czerski, Daphné Giacomazzi, and Cristian Scapozza
Geogr. Helv., 77, 1–20, https://doi.org/10.5194/gh-77-1-2022, https://doi.org/10.5194/gh-77-1-2022, 2022
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The paper presents the results of recent geoarchaeological studies on the Ticino river alluvial plain. The sedimentological descriptions are combined with archaeological observations and constrained with radiocarbon dating. This approach, together with data from previous research and historical sources, provides an interesting overview of the eveolution of Ticino river morphosedimentary dynamics in relation to human settlements since the Neolithic.
Cristian Scapozza, Chantal Del Siro, Christophe Lambiel, and Christian Ambrosi
Geogr. Helv., 76, 401–423, https://doi.org/10.5194/gh-76-401-2021, https://doi.org/10.5194/gh-76-401-2021, 2021
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Exposure ages make it possible to determine the time of weathering of a rock surface. They can be determined from rebound values measured with the Schmidt hammer and calibrated on surfaces of known age, defined in this study thanks to historical cartography and two mule tracks built in 300 and 1250 CE, which allowed us to reconstruct glacier fluctuations over the last 3 centuries in Val Scaradra and to define the time of deglaciation and rock glacier development in the Splügenpass region.
Jonathan Bussard and Elisa Giaccone
Geogr. Helv., 76, 385–399, https://doi.org/10.5194/gh-76-385-2021, https://doi.org/10.5194/gh-76-385-2021, 2021
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In mountain environments, active geomorphological processes have a strong influence on plant diversity because they act as renovators for habitats of pioneer species. In this paper, we propose criteria to assess the ecological value of dynamic mountain geomorphosites. We show that the interest of plant communities and the influence of geomorphological processes on plant communities are fundamental criteria for assessing ecological value in an exhaustive and objective way.
Cristian Scapozza, Christian Ambrosi, Massimiliano Cannata, and Tazio Strozzi
Geogr. Helv., 74, 125–139, https://doi.org/10.5194/gh-74-125-2019, https://doi.org/10.5194/gh-74-125-2019, 2019
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A glacial lake outburst flood hazard assessment by satellite Earth observation and numerical modelling was done for the lakes linked to the Thangothang Chhu glacier, Chomolhari area (Bhutan), combining detailed geomorphological mapping, landslide and rock glacier inventories, as well as surface displacements quantified by satellite InSAR. Outburst scenario modelling revealed that only a flood wave can have an impact on the two human settlements located downslope of the glacier.
Philippe Burkhalter, Markus Egli, and Holger Gärtner
Geogr. Helv., 74, 93–103, https://doi.org/10.5194/gh-74-93-2019, https://doi.org/10.5194/gh-74-93-2019, 2019
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A spatiotemporal reconstruction of slope movements on the edge of Lake Lucerne near the municipality of Horw, canton of Lucerne is presented. The reconstruction was realized by analyzing growth reactions of beech (Fagus sylvatica L.) and fir (Abies alba Mill.) trees growing on this slope. Results show that the area has been moving at least since 1948. A significant concentration of events was observed between 1990 and 2000 as well as after 2006.
Sebastián Vivero and Christophe Lambiel
Geogr. Helv., 74, 59–69, https://doi.org/10.5194/gh-74-59-2019, https://doi.org/10.5194/gh-74-59-2019, 2019
Mario Kummert and Reynald Delaloye
Geogr. Helv., 73, 357–371, https://doi.org/10.5194/gh-73-357-2018, https://doi.org/10.5194/gh-73-357-2018, 2018
Max Boxleitner, Susan Ivy-Ochs, Dagmar Brandova, Marcus Christl, Markus Egli, and Max Maisch
Geogr. Helv., 73, 241–252, https://doi.org/10.5194/gh-73-241-2018, https://doi.org/10.5194/gh-73-241-2018, 2018
Patrick Becker, Martin Funk, Christian Schlüchter, and Kolumban Hutter
Geogr. Helv., 72, 421–442, https://doi.org/10.5194/gh-72-421-2017, https://doi.org/10.5194/gh-72-421-2017, 2017
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This article studies the ice flow in the Valais region during the last glaciation (Würm) in detail. The numerical modelling shows a discrepancy of the height of the ice cap compared to the geomorphological evidence based on trimlines. However, geomorphological evidence at the Simplon Pass indicating an ice flow from the Rhone valley into the valley of Toce was confirmed. Furthermore it is shown that for this confirmation a sufficient ice thickness is obligatory.
Patrick Becker, Julien Seguinot, Guillaume Jouvet, and Martin Funk
Geogr. Helv., 71, 173–187, https://doi.org/10.5194/gh-71-173-2016, https://doi.org/10.5194/gh-71-173-2016, 2016
Frank Techel, Frédéric Jarry, Georg Kronthaler, Susanna Mitterer, Patrick Nairz, Miha Pavšek, Mauro Valt, and Gian Darms
Geogr. Helv., 71, 147–159, https://doi.org/10.5194/gh-71-147-2016, https://doi.org/10.5194/gh-71-147-2016, 2016
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During the last 45 years, about 100 people lost their lives in avalanches in the European Alps each year. Avalanche fatalities in settlements and on transportation corridors have considerably decreased since the 1970s. In contrast, the number of avalanche fatalities during recreational activities away from avalanche-secured terrain doubled between the 1960s and 1980s and has remained relatively stable since, despite a continuing strong increase in winter backcountry recreational activities.
Rachel Luethi and Marcia Phillips
Geogr. Helv., 71, 121–131, https://doi.org/10.5194/gh-71-121-2016, https://doi.org/10.5194/gh-71-121-2016, 2016
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Long-term borehole temperature monitoring in mountain permafrost environments is challenging under the hostile conditions reigning there. On the basis of data measured in the SLF borehole network we show situations where ground temperature data should be interpreted with caution. A selection of recently observed problems are discussed, and advantages and possible drawbacks of various solutions including data correction, measurement redundancy or alternate instrumentation are presented.
P. Greenwood, M. Hoelzle, and N. J. Kuhn
Geogr. Helv., 70, 311–313, https://doi.org/10.5194/gh-70-311-2015, https://doi.org/10.5194/gh-70-311-2015, 2015
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Editorial introducing the special issue of Geographica Helvetica: Mapping, Measuring and Modeling in Geomorphology.
C. Willi, C. Graf, Y. Deubelbeiss, and M. Keiler
Geogr. Helv., 70, 265–279, https://doi.org/10.5194/gh-70-265-2015, https://doi.org/10.5194/gh-70-265-2015, 2015
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The erosion of and depositions on channel bed surfaces are instrumental to understanding debris flow processes. We present different methods and highlight their pro and cons. Terrestrial and airborne laser scanning, erosion sensors, cross sections and geomorphological mapping are compared. Two of these approaches are tested and applied in a torrent. The results indicate that the methods are associated with variable temporal and spatial resolution as well as data quality and invested effort.
S. Müller and D. Schaub
Geogr. Helv., 70, 193–198, https://doi.org/10.5194/gh-70-193-2015, https://doi.org/10.5194/gh-70-193-2015, 2015
L. Xiao, Y. Hu, P. Greenwood, and N. J. Kuhn
Geogr. Helv., 70, 167–174, https://doi.org/10.5194/gh-70-167-2015, https://doi.org/10.5194/gh-70-167-2015, 2015
C. Scapozza
Geogr. Helv., 70, 135–139, https://doi.org/10.5194/gh-70-135-2015, https://doi.org/10.5194/gh-70-135-2015, 2015
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In the scientific literature, “protalus ramparts” can designate both a nivo-gravitational landform (also called “pronival ramparts”) and a permafrost-related landform. Thanks to a selection of eight major diagnostic criteria defined from observations carried out in the Swiss Alps, it was highlighted that the structure, ice content and creep dynamics of protalus ramparts are the same as many rock glaciers. Protalus rampart were therefore defined simply as a (small) active talus rock glacier.
C. Ambrosi and C. Scapozza
Geogr. Helv., 70, 121–133, https://doi.org/10.5194/gh-70-121-2015, https://doi.org/10.5194/gh-70-121-2015, 2015
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Some examples of 3-D digital mapping for Quaternary geological and geomorphological cartography are presented in this paper. Examples concern in particular the Quaternary geological cartography around the well-know Flims rockslide area (Graubünden), performed in the framework of the GeoCover project launched by the Swiss Geological Survey, and the landslide and glacial/periglacial landform mapping and inventorying in the southern Swiss Alps (Ticino) for assessing the slope tectonic activity.
B. Staub, A. Marmy, C. Hauck, C. Hilbich, and R. Delaloye
Geogr. Helv., 70, 45–62, https://doi.org/10.5194/gh-70-45-2015, https://doi.org/10.5194/gh-70-45-2015, 2015
P. Greenwood, S. Kuonen, W. Fister, and N. J. Kuhn
Geogr. Helv., 70, 63–73, https://doi.org/10.5194/gh-70-63-2015, https://doi.org/10.5194/gh-70-63-2015, 2015
Short summary
Short summary
Alpine and mountain slopes represent important pathways that link high-altitude grazing areas to meadows and rangelands at lower elevations. Given the acute gradients associated with such environments, we hypothesize that terracettes act as efficient runoff conveyance routes that facilitate the movement of runoff and associated material during erosion events. This hypothesis was partially disproved during a series of rainfall/runoff simulations on a well-developed terracette system, however.
M. Stähli, C. Graf, C. Scheidl, C. R. Wyss, and A. Volkwein
Geogr. Helv., 70, 1–9, https://doi.org/10.5194/gh-70-1-2015, https://doi.org/10.5194/gh-70-1-2015, 2015
M. Hoelzle and E. Reynard
Geogr. Helv., 68, 225–226, https://doi.org/10.5194/gh-68-225-2013, https://doi.org/10.5194/gh-68-225-2013, 2013
M. Huss, A. Voinesco, and M. Hoelzle
Geogr. Helv., 68, 227–237, https://doi.org/10.5194/gh-68-227-2013, https://doi.org/10.5194/gh-68-227-2013, 2013
R. Weingartner, B. Schädler, and P. Hänggi
Geogr. Helv., 68, 239–248, https://doi.org/10.5194/gh-68-239-2013, https://doi.org/10.5194/gh-68-239-2013, 2013
P. Michna, W. Eugster, R. V. Hiller, M. J. Zeeman, and H. Wanner
Geogr. Helv., 68, 249–263, https://doi.org/10.5194/gh-68-249-2013, https://doi.org/10.5194/gh-68-249-2013, 2013
S. Schneider, S. Daengeli, C. Hauck, and M. Hoelzle
Geogr. Helv., 68, 265–280, https://doi.org/10.5194/gh-68-265-2013, https://doi.org/10.5194/gh-68-265-2013, 2013
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Short summary
Soil erosion by wind and water is a commonly recognized phenomenon on agricultural land. Erosion in forests is studied less and generally considered to be limited because of the soil protection by vegetation. However, trees, when toppled because of old age or wind, loosen a considerable amount of soil when their roots are pulled from the ground. In addition, the holes left in the ground act as collectors for water and concentrated runoff, causing significant soil loss on forested slopes.
Soil erosion by wind and water is a commonly recognized phenomenon on agricultural land. Erosion...
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