Machine learning model can evaluate the effectiveness of management strategies for wildfire prevention

Machine learning model can evaluate the effectiveness of management strategies for wildfire prevention
Satellite image of Borneo in 2006 covered by smoke from fires (marked by red dots). Credit: Jeff Schmaltz, MODIS Rapid Response Team / NASA

Wildfires are a growing threat in a world shaped by climate change. Now, researchers at Aalto University have developed a neural network model that can accurately predict the occurrence of fires in peatlands. They used the new model to assess the effect of different strategies for managing fire risk and identified a suite of interventions that would reduce fire incidence by 50–76%.

The study focused on the Central Kalimantan province of Borneo in Indonesia, which has the highest density of fires in Southeast Asia. Drainage to support agriculture or residential expansion has made peatlands increasingly vulnerable to recurring fires. In addition to threatening lives and livelihoods, peatland fires release significant amounts of carbon dioxide. However, have faced difficulties because of the lack of clear, quantified links between proposed interventions and .

The new model uses measurements taken before each fire season in 2002–2019 to predict the distribution of peatland fires. While the findings can be broadly applied to peatlands elsewhere, a new analysis would have to be done for other contexts. "Our methodology could be used for other contexts, but this specific model would have to be re-trained on the new data," says Alexander Horton, the postdoctoral researcher who carried out study.

The researchers used a convolutional neural network to analyze 31 variables, such as the type of land cover and pre-fire indices of vegetation and drought. Once trained, the network predicted the likelihood of a peatland fire at each spot on the map, producing an expected distribution of fires for the year.

Overall, the neural network's predictions were correct 80–95% of the time. However, while the model was usually right in predicting a fire, it also missed many fires that actually occurred. About half of the observed fires weren't predicted by the model, meaning that it isn't suitable as an early-warning predictive system. Larger groupings of fires tended to be predicted well, while isolated fires were often missed by the network. With further work, the researchers hope to improve the network's performance so it can also serve as an early-warning system.

The team took advantage of the fact that fire predictions were usually correct to test the effect of different land management strategies. By simulating different interventions, they found that the most effective plausible strategy would be to convert shrubland and scrubland into swamp forests, which would reduce fire incidence by 50%. If this were combined with blocking all of the drainage canals except the major ones, fires would decrease by 70% in total.

However, such a strategy would have clear economic drawbacks. "The is in desperate need of long-term, stable cultivation to booster the ," says Horton.

An alternative strategy would be to establish more , since well-managed dramatically reduce the likelihood of fire. However, the plantations are among the key drivers of forest loss, and Horton points out 'the plantations are mostly owned by larger corporations, often based outside Borneo, which means the profits aren't directly fed back into the local economy beyond the provision of labor for the local workforce."

Ultimately, prevention strategies have to balance risks, benefits, and costs, and this research provides the information to do that, explains Professor Matti Kummu, who led the study team. "We tried to quantify how the different strategies would work. It's more about informing than providing direct solutions."

The findings were published in Communications Earth & Environment.

More information: Alexander J. Horton et al, Targeted land management strategies could halve peatland fire occurrences in Central Kalimantan, Indonesia, Communications Earth & Environment (2022). DOI: 10.1038/s43247-022-00534-2

Provided by Aalto University

Citation: Machine learning model can evaluate the effectiveness of management strategies for wildfire prevention (2022, September 9) retrieved 6 December 2022 from https://phys.org/news/2022-09-machine-effectiveness-strategies-wildfire.html
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