Quantifying the influence of fuel age and weather on the annual extent of unplanned fires in the Sydney region of Australia
- 1 January 2011
- journal article
- Published by CSIRO Publishing in International Journal of Wildland Fire
- Vol. 20 (1), 142-151
- https://doi.org/10.1071/wf10016
Abstract
Planned fire is used globally to minimise the risk of unplanned fire, but it is important to measure the return for effort in terms of the reduction of risk per unit area of planned fire. Here, we use 30 years of fire mapping from four subregions of the Sydney region to compare the annual extent of unplanned fire with previous planned and unplanned fire. Using linear mixed modelling, we were able to discriminate the relative influence of previous fire, seasonal rainfall and weather during the peak fire season. The mean annual area burnt over the period was 4.11%, comprising 0.53% planned and 3.58% unplanned. We found that weather during the fire season was the most influential factor. Annual rainfall had a modest negative relationship with unplanned fire area. Past fire had some influence, but the relationship implied that approximately three units of planned fire are required to reduce the unplanned fire area by one unit. Managers would need to burn 5.4% per year to halve unplanned fire extent, a ten-fold increase on recent levels. This would increase the total area burnt, and have other effects that need to be considered (from smoke and greenhouse gas emissions, and changes to biodiversity).Keywords
This publication has 33 references indexed in Scilit:
- The effect of fuel age on the spread of fire in sclerophyll forest in the Sydney region of AustraliaInternational Journal of Wildland Fire, 2010
- Long-term impacts of prescribed burning on regional extent and incidence of wildfires—Evidence from 50 years of active fire management in SW Australian forestsForest Ecology and Management, 2009
- Potential for CO2 emissions mitigation in Europe through prescribed burning in the context of the Kyoto ProtocolForest Ecology and Management, 2007
- Self-Organised Criticality and the Response of Wildland Fires to Climate ChangeClimatic Change, 2007
- Does fire occurrence modify the probability of being burned again? A null hypothesis test from Mediterranean ecosystems in NE SpainEcological Modelling, 2005
- Future Area Burned in CanadaClimatic Change, 2005
- Modelling the effect of fire-exclusion and prescribed fire on wildfire size in Mediterranean ecosystemsEcological Modelling, 2005
- Applying landscape principles to fire hazard reductionForest Ecology and Management, 2004
- Statistical forecasting of soil dryness index in the southwest of Western AustraliaForest Ecology and Management, 2003
- Historic Fire Regime in Southern California ShrublandsConservation Biology, 2001