An advanced approach for leaf flammability index estimation
Coşkun Okan Güney
A * , Abdullah Sarı B , Hatice Oncel Cekim C , Ecir Uğur Küçüksille D , Özdemir Şentürk E , Serkan Gülsoy F and Kürşad Özkan F
+ Author Affiliations
- Author Affiliations
A Department of Forest Fires, Aegean Forest Research Institute, 35430 İzmir, Turkey.
B Department of Forest Fires, Southwest Anatolia Forest Research Institute, 07010 Antalya, Turkey.
C Department of Statistics, Hacettepe University, 06800 Ankara, Turkey.
D Department of Computer Engineering, Süleyman Demirel University, 32260 Isparta, Turkey.
E Department of Forestry, Burdur Mehmet Akif Ersoy University, 15400 Burdur, Turkey.
F Department of Soil Science and Ecology, Isparta University of Applied Science, 32200 Isparta, Turkey.
* Correspondence to: coskunokanguney@ogm.gov.tr
International Journal of Wildland Fire 31(3) 277-290 https://doi.org/10.1071/WF21022
Submitted: 14 February 2021 Accepted: 11 January 2022 Published: 18 February 2022
© 2022 The Author(s) (or their employer(s)). Published by CSIRO Publishing on behalf of IAWF.
Abstract
Vegetation is the only component that can be directly managed to reduce the negative consequences of wildland fires. Flammability indexes provide information about plant flammability characteristics and are commonly used in wildland fuel management. However, previous flammability indexes were usually based on only two or three flammability components. We propose an advanced approach for leaf flammability index estimation that integrates all four flammability components (ignitability, combustibility, sustainability and consumability) using cluster and linear discriminant analyses. We measured time to ignition, ignition temperature, maximum flame height, combustion time, mass loss percentage and fuel moisture content of 15 plant species most affected by forest fires in Turkey (every two weeks, from May to September). Species were divided into different flammability classes and ranked according to their flammability index (FI) values. Classifications and FI rankings showed seasonal variations for some of the species. During May and June, fuel moisture contents explained ~50–60% of variation in leaf flammability but this relationship steadily decreased towards September (13%) when weather conditions became drier. The proposed approach for FI estimation offers a more detailed flammability assessment and comparison between plants. It can be used to identify less flammable plants for fuel breaks and landscaping in the wildland–urban interface.
Keywords: fire hazard, flammability classification, forest fire, fuel management, fuel moisture content, green fuel breaks, Mediterranean, wildland–urban interface.
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