The influence of surficial features in lava flow modelling
Abstract Lava flows can cause substantial and immediate damage to the built environment and affect the economy and society over days through to decades. Lava flow modelling can be undertaken to help stakeholders prepare for and respond to lava flow crises. Traditionally, lava flow modelling is condu...
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Online Access: | http://link.springer.com/article/10.1186/s13617-020-00095-z |
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doaj-1487a29ef3d645a2a05a4adda65b35822020-11-25T03:54:42ZengBMCJournal of Applied Volcanology2191-50402020-06-019111210.1186/s13617-020-00095-zThe influence of surficial features in lava flow modellingSophia W. R. Tsang0Jan M. Lindsay1Giovanni Coco2Natalia I. Deligne3School of Environment, University of AucklandSchool of Environment, University of AucklandSchool of Environment, University of AucklandGNS ScienceAbstract Lava flows can cause substantial and immediate damage to the built environment and affect the economy and society over days through to decades. Lava flow modelling can be undertaken to help stakeholders prepare for and respond to lava flow crises. Traditionally, lava flow modelling is conducted on a digital elevation model, but this type of representation of the surface may not be appropriate for all settings. Indeed, we suggest that in urban areas a digital surface model may more accurately capture all of the obstacles a lava flow would encounter. We use three effusive eruption scenarios in the well-studied Auckland Volcanic Field (New Zealand) to demonstrate the difference between modelling on an elevation model versus on a surface model. The influence of surficial features on lava flow modelling results is quantified using a modified Jaccard coefficient. For the scenario in the most urbanised environment, the Jaccard coefficient is 40%, indicating less than half of the footprints overlap, while for the scenario in the least urbanised environment, the Jaccard coefficient is 90%, indicating substantial overlap. We find that manmade surficial features can influence the hazard posed by lava flows and that a digital surface model may be more applicable in highly modified environments.http://link.springer.com/article/10.1186/s13617-020-00095-zDEMDSMAuckland volcanic fieldLava flow hazard modellingBirkenheadMt. Eden |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sophia W. R. Tsang Jan M. Lindsay Giovanni Coco Natalia I. Deligne |
spellingShingle |
Sophia W. R. Tsang Jan M. Lindsay Giovanni Coco Natalia I. Deligne The influence of surficial features in lava flow modelling Journal of Applied Volcanology DEM DSM Auckland volcanic field Lava flow hazard modelling Birkenhead Mt. Eden |
author_facet |
Sophia W. R. Tsang Jan M. Lindsay Giovanni Coco Natalia I. Deligne |
author_sort |
Sophia W. R. Tsang |
title |
The influence of surficial features in lava flow modelling |
title_short |
The influence of surficial features in lava flow modelling |
title_full |
The influence of surficial features in lava flow modelling |
title_fullStr |
The influence of surficial features in lava flow modelling |
title_full_unstemmed |
The influence of surficial features in lava flow modelling |
title_sort |
influence of surficial features in lava flow modelling |
publisher |
BMC |
series |
Journal of Applied Volcanology |
issn |
2191-5040 |
publishDate |
2020-06-01 |
description |
Abstract Lava flows can cause substantial and immediate damage to the built environment and affect the economy and society over days through to decades. Lava flow modelling can be undertaken to help stakeholders prepare for and respond to lava flow crises. Traditionally, lava flow modelling is conducted on a digital elevation model, but this type of representation of the surface may not be appropriate for all settings. Indeed, we suggest that in urban areas a digital surface model may more accurately capture all of the obstacles a lava flow would encounter. We use three effusive eruption scenarios in the well-studied Auckland Volcanic Field (New Zealand) to demonstrate the difference between modelling on an elevation model versus on a surface model. The influence of surficial features on lava flow modelling results is quantified using a modified Jaccard coefficient. For the scenario in the most urbanised environment, the Jaccard coefficient is 40%, indicating less than half of the footprints overlap, while for the scenario in the least urbanised environment, the Jaccard coefficient is 90%, indicating substantial overlap. We find that manmade surficial features can influence the hazard posed by lava flows and that a digital surface model may be more applicable in highly modified environments. |
topic |
DEM DSM Auckland volcanic field Lava flow hazard modelling Birkenhead Mt. Eden |
url |
http://link.springer.com/article/10.1186/s13617-020-00095-z |
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