Articles | Volume 74, issue 1
https://doi.org/10.5194/gh-74-81-2019
© Author(s) 2019. 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-74-81-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Testing of photogrammetry for differentiation of soil organic carbon and biochar in sandy substrates
Wolfgang Fister
CORRESPONDING AUTHOR
Physical Geography and Environmental Change Group, Department of
Environmental Sciences, University of Basel, Klingelbergstr. 27, 4056 Basel,
Switzerland
Nina Goldman
Physical Geography and Environmental Change Group, Department of
Environmental Sciences, University of Basel, Klingelbergstr. 27, 4056 Basel,
Switzerland
Marius Mayer
Physical Geography and Environmental Change Group, Department of
Environmental Sciences, University of Basel, Klingelbergstr. 27, 4056 Basel,
Switzerland
Manuel Suter
Physical Geography and Environmental Change Group, Department of
Environmental Sciences, University of Basel, Klingelbergstr. 27, 4056 Basel,
Switzerland
Nikolaus J. Kuhn
Physical Geography and Environmental Change Group, Department of
Environmental Sciences, University of Basel, Klingelbergstr. 27, 4056 Basel,
Switzerland
Related authors
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
Short summary
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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.
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.
Nikolaus Josef Kuhn and Federica Trudu
Earth Surf. Dynam. Discuss., https://doi.org/10.5194/esurf-2023-11, https://doi.org/10.5194/esurf-2023-11, 2023
Revised manuscript has not been submitted
Short summary
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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
Short summary
Short summary
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.
Philip Greenwood, Jan Bauer, and Nikolaus J. Kuhn
Geogr. Helv., 76, 319–333, https://doi.org/10.5194/gh-76-319-2021, https://doi.org/10.5194/gh-76-319-2021, 2021
Short summary
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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.
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.
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
Short summary
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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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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
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.
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
Related subject area
Others (Geographical Information Science, Remote Sensing, Cartography)
Die another day: explanations based on qualitative comparative analysis (QCA) for the survival and non-survival of isolated ski lifts in Switzerland
The State as a “form of life” and the space as Leistungsraum: the reception of Ratzel in the First and Second World Wars
People's knowledge and perceptions of Trachycarpus fortunei (Chinese windmill palm) invasions and their management in Ticino, Switzerland
What can we see from the road? Applications of a cumulative viewshed analysis on a US state highway network
Geological monitoring networks for risk management close to large rock cliffs: the case history of Gallivaggio and Cataeggio in the italian Alps
Fuzzy difference and data primitives: a transparent approach for supporting different definitions of forest in the context of REDD+
The bedrock topography of Gries- and Findelengletscher
Forests: the cross-linguistic perspective
Drones for justice: inclusive technology and river-related action research along the Kapuas
Une représentation du risque à l'intersection de l'aléa et de la vulnérabilité: cartographies des inondations lyonnaises
Estimating greenhouse gas emissions from travel – a GIS-based study
Steve Schlegel and Christoph Schuck
Geogr. Helv., 79, 85–99, https://doi.org/10.5194/gh-79-85-2024, https://doi.org/10.5194/gh-79-85-2024, 2024
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Why do isolated Swiss ski lifts die? A comprehensive survey of all isolated lifts ever established in Switzerland is conducted. Using a set-theoretical method (qualitative comparative analysis), it is shown that closed isolated lifts tend to be outdated and have no technical snowmaking facilities. Moreover, it is evident that the simultaneous occurrence of the lack of lift facility replacement, lack of snowmaking and high ski area competition has caused the closure of most isolated lifts.
Patricia Chiantera-Stutte
Geogr. Helv., 78, 29–39, https://doi.org/10.5194/gh-78-29-2023, https://doi.org/10.5194/gh-78-29-2023, 2023
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The relevance of the outbreak of the First and Second World Wars to the posthumous reception of Ratzel's work cannot be overestimated; Kjellen in particular was one of the main protagonists of Ratzel's revival. Kjellen and Schmitt appropriated and transformed Ratzel's concepts for their research aims, in order to highlight a new turning point in the political and juridical sciences and in politics. As a consequence, their Ratzel was oriented toward militant aims.
Micol Genazzi, Antoine Guisan, and Ross T. Shackleton
Geogr. Helv., 77, 443–453, https://doi.org/10.5194/gh-77-443-2022, https://doi.org/10.5194/gh-77-443-2022, 2022
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This paper assesses peoples' knowledge and perceptions of the invasive palm (Trachycarpus fortunei) in Ticino, Switzerland. Such information is important for guiding decision-making and management planning. In general, although the palm induces positive perceptions in most respondents, the majority of people realise the threat that invasions pose to the region. Therefore, most respondents supported the regulations and management for this popular ornamental plant.
Sterling D. Quinn
Geogr. Helv., 77, 165–178, https://doi.org/10.5194/gh-77-165-2022, https://doi.org/10.5194/gh-77-165-2022, 2022
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This study uses geographic information systems (GIS) to determine which landforms are most visible to motorists from the highways of the northwestern US. Using an elevation dataset, a computer determined the area visible from sample points taken at 1 km intervals along the highway network. Highly visible mountains, ridges, and valleys were identified and mapped. These methods can be used to identify scenic byways, inform infrastructure development, and improve maps and navigation apps.
Luca Dei Cas, Maria Luisa Pastore, Andrea Pavan, and Nicola Petrella
Geogr. Helv., 76, 85–101, https://doi.org/10.5194/gh-76-85-2021, https://doi.org/10.5194/gh-76-85-2021, 2021
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La riduzione del rischio, nelle aree poste in prossimità di pareti rocciose, mediante gestione dei sistemi di monitoraggio con finalità d'allerta evidenzia potenzialità, ma anche numerose criticità e limiti. L'articolo prende in esame due frane, originatesi da pareti rocciose, avvenute in prossimità di aree abitate nelle Alpi. Si analizzano costi ed efficacia sia delle opere di difesa sia dei sistemi di monitoraggio con funzione di early warning anche in relazione a soglie d'allerta e scenari.
Alexis Comber and Werner Kuhn
Geogr. Helv., 73, 151–163, https://doi.org/10.5194/gh-73-151-2018, https://doi.org/10.5194/gh-73-151-2018, 2018
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REDD+ requires forests to be measured. However, many communities have their own concepts of
forestwith different meanings. Global forest inventories frequently ignore these conceptualizations. This paper describes an approach for generating alternative measures of forest simultaneously to support the international objectives of activities such as REDD+ and to reflect local concepts and semantics associated with
forest.
Nadine Feiger, Matthias Huss, Silvan Leinss, Leo Sold, and Daniel Farinotti
Geogr. Helv., 73, 1–9, https://doi.org/10.5194/gh-73-1-2018, https://doi.org/10.5194/gh-73-1-2018, 2018
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This contribution presents two updated bedrock topographies and ice thickness distributions with a new uncertainty assessment for Gries- and Findelengletscher, Switzerland. The results are based on ground-penetrating radar (GPR) measurements and the
ice thickness estimation method (ITEM). The results show a total glacier volume of 0.28 ± 0.06 and 1.00 ± 0.34 km3 for Gries- and Findelengletscher, respectively, with corresponding average ice thicknesses of 56.8 ± 12.7 and 56.3 ± 19.6 m.
Niclas Burenhult, Clair Hill, Juliette Huber, Saskia van Putten, Konrad Rybka, and Lila San Roque
Geogr. Helv., 72, 455–464, https://doi.org/10.5194/gh-72-455-2017, https://doi.org/10.5194/gh-72-455-2017, 2017
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In this paper we explore semantic diversity observed in relation to forests. We do so on the basis of first-hand linguistic field data from a global sample of indigenous categorization systems as they are manifested in six diverse languages. We show that basic linguistic categories relating to tree cover vary considerably in their principles of semantic encoding across languages, and that
forestis a challenging category from the point of view of intercultural translatability.
Irendra Radjawali and Oliver Pye
Geogr. Helv., 72, 17–27, https://doi.org/10.5194/gh-72-17-2017, https://doi.org/10.5194/gh-72-17-2017, 2017
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This article discusses the potential of using drones for community based counter-mapping. Drawing on action research conducted along the Kapuas River in West Kalimantan, Indonesia, we describe how drones were used for political interventions against land grabs by palm oil and mining companies. We argue that self-built drones can be used by local activists in an emancipatory and inclusive way, thereby becoming a weapon of the weak against land and resource grabs.
F. Renard and D. Soto
Geogr. Helv., 70, 333–348, https://doi.org/10.5194/gh-70-333-2015, https://doi.org/10.5194/gh-70-333-2015, 2015
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Vulnerability analysis is essential to risk studies. Starting with the key concepts of risk, this work provides a procedure which allows precise knowledge of the local vulnerability, available to all types of hazards and applicable to all areas. Finally, in order to get an overall perspective of risk, assets vulnerabilities are crossed with the hazards areas, in accordance to the spatial distribution of both components and using innovative geomatics operations.
S. Kuonen
Geogr. Helv., 70, 185–192, https://doi.org/10.5194/gh-70-185-2015, https://doi.org/10.5194/gh-70-185-2015, 2015
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In this study, the GHG emissions from travel activities of attendees of the EGEA annual conference 2013 have been calculated in a GIS-based analysis. The travel activities of the participants result in total GHG emissions of 39,300 kg CO2-eq including both outward and return trip. On average a participant caused GHG emissions of 401 kg CO2-eq. The potential to reduce GHG emissions by substituting flights (-32.6%) and choosing a more central site (-26.3%) has also been assessed.
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