Examining the impact of lahars on buildings using numerical modelling

Stuart R. Mead*, Christina Magill, Vincent Lemiale, Jean-Claude Thouret, Mahesh Prakash

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)
34 Downloads (Pure)

Abstract

Lahars are volcanic flows containing a mixture of fluid and sediment which have the potential to cause significant damage to buildings, critical infrastructure and human life. The extent of this damage is controlled by properties of the lahar, location of elements at risk and susceptibility of these elements to the lahar. Here we focus on understanding lahar-induced building damage. Quantification of building damage can be difficult due to the complexity of lahar behaviour (hazard), varying number and type of buildings exposed to the lahar (exposure) and the uncertain susceptibility of buildings to lahar impacts (vulnerability). In this paper, we quantify and examine the importance of lahar hazard, exposure and vulnerability in determining building damage with reference to a case study in the city of Arequipa, Peru. Numerical modelling is used to investigate lahar properties that are important in determining the inundation area and forces applied to buildings. Building vulnerability is quantified through the development of critical depth-pressure curves based on the ultimate bending moment of masonry structures. In the case study area, results suggest that building strength plays a minor role in determining overall building losses in comparison to the effects of building exposure and hydraulic characteristics of the lahar.

Original languageEnglish
Pages (from-to)703-719
Number of pages17
JournalNatural Hazards and Earth System Sciences
Volume17
Issue number5
DOIs
Publication statusPublished - 17 May 2017

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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