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Article

Towards the Development of a Probabilistic Approach to Informal Settlement Fire Spread Using Ignition Modelling and Spatial Metrics

by
Antonio Cicione
1,*,
Lesley Gibson
2,
Colleen Wade
3,
Michael Spearpoint
4,
Richard Walls
1 and
David Rush
2
1
Department of Civil Engineering, Stellenbosch University, Private Bag X1, Matieland 7602, Stellenbosch, South Africa
2
School of Engineering, University of Edinburgh, Edinburgh EH9 3JL, UK
3
Fire Research Group Ltd., Christchurch 8023, New Zealand
4
OFR Consultants, Sevendale House, Lever St., Manchester M1 1JA, UK
*
Author to whom correspondence should be addressed.
Fire 2020, 3(4), 67; https://doi.org/10.3390/fire3040067
Submission received: 5 October 2020 / Revised: 28 October 2020 / Accepted: 6 November 2020 / Published: 15 November 2020
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Abstract

Large conflagrations of informal settlements occur regularly, leaving thousands of people homeless daily and taking tens of thousands of lives annually. Over the past few years, a large amount of data has been collected from a number of full-scale informal settlement fire experiments. This paper uses that data with a semi-probabilistic fire model previously proposed by the authors, to illustrate the potential applications of the fire spread method proposed. The current model is benchmarked against a 20-dwelling full-scale informal settlement fire experiment, and the effects of the (a) ignition criteria, (b) wind direction, and (c) wind speeds on the predicted fire spread rates are investigated through the use of a parametric study. Colour maps of the fire spread rates and patterns are then used to visually interpret the effects of different types of fire scenarios and fire breaks. Finally, the fire spread capability within B-RISK is used to derive a linear equation for the potential fire spread rate as a function of the settlement spatial metrics (e.g., density and distance to nearest neighbour). To further illustrate the potential application of this work, the fire spread rate equation is then applied across the whole of Cape Town, South Africa, to show the 10 informal settlement areas most at “risk” of large conflagrations.
Keywords: informal settlements; fire spread; ignition; spatial metrics; B-RISK; probabilistic simulation informal settlements; fire spread; ignition; spatial metrics; B-RISK; probabilistic simulation

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MDPI and ACS Style

Cicione, A.; Gibson, L.; Wade, C.; Spearpoint, M.; Walls, R.; Rush, D. Towards the Development of a Probabilistic Approach to Informal Settlement Fire Spread Using Ignition Modelling and Spatial Metrics. Fire 2020, 3, 67. https://doi.org/10.3390/fire3040067

AMA Style

Cicione A, Gibson L, Wade C, Spearpoint M, Walls R, Rush D. Towards the Development of a Probabilistic Approach to Informal Settlement Fire Spread Using Ignition Modelling and Spatial Metrics. Fire. 2020; 3(4):67. https://doi.org/10.3390/fire3040067

Chicago/Turabian Style

Cicione, Antonio, Lesley Gibson, Colleen Wade, Michael Spearpoint, Richard Walls, and David Rush. 2020. "Towards the Development of a Probabilistic Approach to Informal Settlement Fire Spread Using Ignition Modelling and Spatial Metrics" Fire 3, no. 4: 67. https://doi.org/10.3390/fire3040067

APA Style

Cicione, A., Gibson, L., Wade, C., Spearpoint, M., Walls, R., & Rush, D. (2020). Towards the Development of a Probabilistic Approach to Informal Settlement Fire Spread Using Ignition Modelling and Spatial Metrics. Fire, 3(4), 67. https://doi.org/10.3390/fire3040067

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