Estimation of volcanic ashfall deposit and removal works based on ash dispersion simulations

Volcanic ashfall can cause considerable social impacts to a wide geographical area. Given the challenge to predict volcanic eruptions, it is essential to simulate the dispersion of ash as soon as possible after an event and promptly estimate the distribution of deposits and necessary removal works....

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Bibliographic Details
Published in:Natural hazards (Dordrecht) 2020-09, Vol.103 (3), p.3377-3399
Main Authors: Tomii, Yosuke, Shibayama, Tomoya, Nishida, Yuta, Nakamura, Ryota, Okumura, Non, Yamaguchi, Hideaki, Tanokura, Yosuke, Oshima, Yu, Sugawara, Natsuko, Fujisawa, Kota, Wakita, Takayuki, Mikami, Takahito, Takabatake, Tomoyuki, Esteban, Miguel
Format: Article
Language:English
Subjects:
Accuracy
Ashes
Civil Engineering
Computer simulation
Dispersion
Earth and Environmental Science
Earth Sciences
Environmental Management
Floods
Fluvial deposits
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Infrastructure
Meteorological research
Model accuracy
Natural Hazards
Original Paper
Particle size
Polls & surveys
Removal
Research centers
River channels
Roads
Roads & highways
Social impact
Storm damage
Surveys
Transportation networks
Volcanic activity
Volcanic ash
Volcanic deposits
Volcanic eruption effects
Volcanic eruptions
Volcanoes
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Summary:Volcanic ashfall can cause considerable social impacts to a wide geographical area. Given the challenge to predict volcanic eruptions, it is essential to simulate the dispersion of ash as soon as possible after an event and promptly estimate the distribution of deposits and necessary removal works. In this study, a series of procedures to improve the accuracy of the WRF-FALL3D model for the case of the eruption of Mt. Kusatsu-Shirane in 2018 are proposed, which were verified through field surveys of ash deposits, showing that the accuracy of the model can be improved by selecting a range of column heights and promptly conducting field surveys following an event. Also, a methodology to estimate the amount of work necessary to clear road networks and river channels is proposed, which was applied to a volcanic event similar to that of the Hoei eruption of Mt. Fuji in 1707. The results also emphasize the need to improve the estimation of column heights in the future, which is of paramount importance to ensure the safety and operational continuity of human infrastructure in the vicinity of major active volcanoes.
ISSN:0921-030X
1573-0840
DOI:10.1007/s11069-020-04134-1