Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments
<p>Different models have been used in science and practice to identify instream large-wood (LW) sources and to estimate LW supply to rivers. This contribution reviews the existing models proposed in the last 35 years and compares two of the most recent geographic information system (GIS)-based...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-06-01
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| Series: | Earth Surface Dynamics |
| Online Access: | https://esurf.copernicus.org/articles/11/487/2023/esurf-11-487-2023.pdf |
| _version_ | 1827921287261978624 |
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| author | N. Steeb V. Ruiz-Villanueva V. Ruiz-Villanueva A. Badoux C. Rickli A. Mini M. Stoffel M. Stoffel M. Stoffel D. Rickenmann |
| author_facet | N. Steeb V. Ruiz-Villanueva V. Ruiz-Villanueva A. Badoux C. Rickli A. Mini M. Stoffel M. Stoffel M. Stoffel D. Rickenmann |
| author_sort | N. Steeb |
| collection | DOAJ |
| description | <p>Different models have been used in science and practice to identify instream large-wood (LW) sources and to estimate LW supply to rivers. This
contribution reviews the existing models proposed in the last 35 years and compares two of the most recent geographic information system (GIS)-based models by applying them to 40 catchments in Switzerland. Both models, which we call here the empirical GIS approach (EGA) and fuzzy-logic GIS approach (FGA), consider landslides, debris flows, bank erosion, and mobilization of instream wood as recruitment processes and compute volumetric estimates of LW supply based on three different scenarios of process frequency and magnitude. Despite being developed following similar concepts and fed with similar input data, the results from the two models differ markedly. In general, estimated supply wood volumes were larger in each of the scenarios when computed with the FGA and lower with the EGA models. Landslides were the dominant process identified by the EGA, whereas bank erosion was the predominant process according to the FGA model. These differences are discussed, and results are compared to available observations coming from a unique database. Regardless of the limitations of these models, they are useful tools for hazard assessment, the design of infrastructure, and other management strategies.</p> |
| first_indexed | 2024-03-13T04:25:19Z |
| format | Article |
| id | doaj.art-e2203879a8164d4b9b44584d1d5b0a77 |
| institution | Directory Open Access Journal |
| issn | 2196-6311 2196-632X |
| language | English |
| last_indexed | 2024-03-13T04:25:19Z |
| publishDate | 2023-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Earth Surface Dynamics |
| spelling | doaj.art-e2203879a8164d4b9b44584d1d5b0a772023-06-20T07:14:11ZengCopernicus PublicationsEarth Surface Dynamics2196-63112196-632X2023-06-011148750910.5194/esurf-11-487-2023Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchmentsN. Steeb0V. Ruiz-Villanueva1V. Ruiz-Villanueva2A. Badoux3C. Rickli4A. Mini5M. Stoffel6M. Stoffel7M. Stoffel8D. Rickenmann9Swiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, SwitzerlandC-CIA-Climate Change Impacts and Risks in the Anthropocene, Institute for Environmental Sciences (ISE), University of Geneva, 1205 Geneva, SwitzerlandInstitute of Earth Surface Dynamics (IDYST), Faculty of Geoscience and Environment, University of Lausanne, 1015 Lausanne, SwitzerlandSwiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, SwitzerlandSwiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, SwitzerlandInstitute of Earth Surface Dynamics (IDYST), Faculty of Geoscience and Environment, University of Lausanne, 1015 Lausanne, SwitzerlandC-CIA-Climate Change Impacts and Risks in the Anthropocene, Institute for Environmental Sciences (ISE), University of Geneva, 1205 Geneva, SwitzerlandDendrolab.ch, Department of Earth Sciences, University of Geneva, Geneva, SwitzerlandDepartment F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, 1205 Geneva, SwitzerlandSwiss Federal Research Institute WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland<p>Different models have been used in science and practice to identify instream large-wood (LW) sources and to estimate LW supply to rivers. This contribution reviews the existing models proposed in the last 35 years and compares two of the most recent geographic information system (GIS)-based models by applying them to 40 catchments in Switzerland. Both models, which we call here the empirical GIS approach (EGA) and fuzzy-logic GIS approach (FGA), consider landslides, debris flows, bank erosion, and mobilization of instream wood as recruitment processes and compute volumetric estimates of LW supply based on three different scenarios of process frequency and magnitude. Despite being developed following similar concepts and fed with similar input data, the results from the two models differ markedly. In general, estimated supply wood volumes were larger in each of the scenarios when computed with the FGA and lower with the EGA models. Landslides were the dominant process identified by the EGA, whereas bank erosion was the predominant process according to the FGA model. These differences are discussed, and results are compared to available observations coming from a unique database. Regardless of the limitations of these models, they are useful tools for hazard assessment, the design of infrastructure, and other management strategies.</p>https://esurf.copernicus.org/articles/11/487/2023/esurf-11-487-2023.pdf |
| spellingShingle | N. Steeb V. Ruiz-Villanueva V. Ruiz-Villanueva A. Badoux C. Rickli A. Mini M. Stoffel M. Stoffel M. Stoffel D. Rickenmann Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments Earth Surface Dynamics |
| title | Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments |
| title_full | Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments |
| title_fullStr | Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments |
| title_full_unstemmed | Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments |
| title_short | Geospatial modelling of large-wood supply to rivers: a state-of-the-art model comparison in Swiss mountain river catchments |
| title_sort | geospatial modelling of large wood supply to rivers a state of the art model comparison in swiss mountain river catchments |
| url | https://esurf.copernicus.org/articles/11/487/2023/esurf-11-487-2023.pdf |
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