August 24, 2023
Prioritizing Prescribed Burning
Decision support tools to schedule and optimize the implementation of prescribed broadcast burning blocks have received relatively little attention despite the backlog that potentially exceeds several million acres on western US national forests and in other fire prone regions globally. The problem in many forests in the western US is that most of the prescribed fire backlog exists in areas that have marginal commercial thinning opportunities, yet maintenance prescribed fire treatments are needed to reduce surface fuels. ForSys was used to create projects in and around areas in need of prescribed fire treatments, bending the project boundaries along the ecological gradients of dry and moist mixed conifer forest types where the latter provided commercial thinning opportunities that could create a financially viable project. Inclusion of costs and benefits yielded financial treatment profiles for each planning area. A new measure of resiliency was created that measured the excess stand density index as a proportion of the site potential. In general, we found that restoration treatments in dry forests that included density reduction thinning and broadcast burning resulted in a net projected cost that ranged from $110 to $8,000 per ha. By contrast, density reduction thinning in moist mixed conifer forests on more productive microsites generated significant commercial timber volume and projected revenue that ranged from $4,000 to $20,000 per ha. Multiple project area sizes were also explored to understand the effect of restoration scale on financial outcomes. We found that optimal projects in terms of generating revenue to subsidize density reduction and broadcast burning were 810 ha and contained >50% of dry forest area. Larger projects and those with a higher percentage of dry forest area resulted in lower revenue, eliminating revenue when projects reached 2,700 ha. Forest restoration programs can use these methods to plan and design restoration projects that are financially viable while addressing the broadcast burn backlog in dry forests that require relatively expensive fuel reduction treatments prior to re-introducing fire.