im PublikationsserverTitelangaben
Rom, Jakob ; Haas, Florian
; Hofmeister, Florentin ; Fleischer, Fabian ; Altmann, Moritz ; Pfeiffer, Madlene ; Heckmann, Tobias ; Becht, Michael:
Analysing the Large-scale Debris Flow Event in July 2022 in Horlachtal, Austria Using Remote Sensing and Measurement Data.
In: Geosciences. 13 (2023) 4: 100.
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Link zum Volltext (externe URL): https://doi.org/10.3390/geosciences13040100 |
Kurzfassung/Abstract
High-quality in situ measurements are essential for hazard assessment of debris flow events. However, precise data on debris flow triggering thresholds, accumulation volumes and spatial characteristics of large-scale events on catchment scale are scarce due to the rare occurrence of debris flows and the challenges of acquiring accurate data for a larger area. In this study, we present quantitative analyses of a single extreme debris flow event in the Horlachtal, Austria, triggered by local high-intensity short-duration precipitation events on 20 and 23 July 2022. Pre- and post-event airborne LiDAR (light detection and ranging) data with a high spatial resolution reveal that 156 different debris flow processes were initiated during these events, with accumulation volumes of up to approximately 40,000 m³. The calculated debris flow deposition volumes also show a power-law relationship with the total amount of rainfall in the respective debris flow catchments. The spatial appearance of the debris flows shows a concentration of processes in a particular area rather than a uniform distribution, suggesting a local nature of the triggering event. This is further supported by the measurements from three meteorological stations and four discharge gauges within the study area. The gridded area-wide INCA (Integrated Nowcasting through Comprehensive Analysis) rainfall data further point to a local convective event on 20 July 2022, with a maximum rainfall intensity of 44 mm/h.
Forschungsprojekte
Research Unit SEHAG - Sensitivity of high Alpine geosystems to climate change since 1850 (SEHAG)
Weitere Angaben
| Publikationsform: | Artikel |
|---|---|
| Schlagwörter: | debris flows; precipitation event; Austrian Alps; Horlachtal; LiDAR |
| Sprache des Eintrags: | Englisch |
| Institutionen der Universität: | Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie |
| DOI / URN / ID: | 10.3390/geosciences13040100 |
| Open Access: Freie Zugänglichkeit des Volltexts?: | Ja |
| Peer-Review-Journal: | Ja |
| Titel an der KU entstanden: | Ja |
| KU.edoc-ID: | 31899 |
Letzte Änderung: 27. Mär 2023 10:29
URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/31899/
