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| Titel |
Preliminary assessment for the use of VORIS as a tool for rapid lava flow simulation at Goma Volcano Observatory, Democratic Republic of the Congo |
| VerfasserIn |
A. M. Syavulisembo, H.-B. Havenith, B. Smets, N. d'Oreye, J. Martí |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 15, no. 10 ; Nr. 15, no. 10 (2015-10-22), S.2391-2400 |
| Datensatznummer |
250119724
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| Publikation (Nr.) |
 copernicus.org/nhess-15-2391-2015.pdf |
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| Zusammenfassung |
| Assessment and management of volcanic risk are important scientific,
economic, and political issues, especially in densely populated areas
threatened by volcanoes. The Virunga volcanic province in the Democratic
Republic of the Congo, with over 1 million inhabitants, has to cope permanently
with the threat posed by the active Nyamulagira and Nyiragongo volcanoes.
During the past century, Nyamulagira erupted at intervals of 1–4 years –
mostly in the form of lava flows – at least 30 times. Its summit and flank
eruptions lasted for periods of a few days up to more than 2 years, and
produced lava flows sometimes reaching distances of over 20 km from the
volcano. Though most of the lava flows did not reach urban areas, only
impacting the forests of the endangered Virunga National Park, some of them
related to distal flank eruptions affected villages and roads. In order to
identify a useful tool for lava flow hazard assessment at Goma Volcano
Observatory (GVO), we tested VORIS 2.0.1 (Felpeto et al., 2007), a freely
available software (http://www.gvb-csic.es) based on a probabilistic
model that considers topography as the main parameter controlling the lava
flow propagation. We tested different parameters and digital elevation
models (DEM) – SRTM1, SRTM3, and ASTER GDEM – to evaluate the sensitivity
of the models to changes in input parameters of VORIS 2.0.1. Simulations
were tested against the known lava flows and topography from the 2010
Nyamulagira eruption. The results obtained show that VORIS 2.0.1 is a quick,
easy-to-use tool for simulating lava-flow eruptions and replicates to a high
degree of accuracy the eruptions tested when input parameters are
appropriately chosen. In practice, these results will be used by GVO to
calibrate VORIS for lava flow path forecasting during new eruptions, hence
contributing to a better volcanic crisis management. |
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