Fuels & Fuel Treatments
In this issue:
- Fuels Guide for Sagebrush and Pinyon-Juniper Reduction Treatments: 10 years post-treatment
- Biological soil crusts as restoration targets in sagebrush steppe and woodland communities
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Higher tree density, more fuels, and a warmer, drier climate have caused an increase in the frequency, size, and severity of wildfires in western U.S. forests. There is an urgent need to restore forests across the western United States. To address this need, the U.S. Forest Service began the Four Forest Restoration Initiative (4FRI) to restore four national forests in Arizona. The objective of this study was to evaluate how restoration of ~400,000 ha under the 4FRI program and projected climate change would influence carbon dynamics and wildfire severity from 2010 to 2099. Specifically, we estimated forest carbon fluxes, carbon pools and wildfire severity under a moderate and fast 4FRI implementation schedule and compared those to status quo and no‐harvest scenarios using the LANDIS‐II simulation model and climate change projections.
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This study presents a fuel treatment optimization model to minimize risk to multiple water supplies based on constraints for treatment feasibility and cost. Risk is quantified as the expected sediment impact costs to water supplies by combining measures of fire likelihood and behavior, erosion, sediment transport and water supply vulnerability. We demonstrate the model’s utility for prioritizing fuel treatments in two large watersheds in Colorado, USA, that are critical for municipal water supply. Our results indicate that wildfire risk to water supplies can be substantially reduced by treating a small portion of the watersheds that have dense, fire-prone forests on steep slopes that drain to water supply infrastructure. Our results also show that the cost of fuel treatments outweighs the expected cost savings from reduced sediment inputs owing to the low probability of fuel treatments encountering wildfire and the high cost of thinning forests. This highlights the need to expand use of more cost-effective treatments, like prescribed fire, and to identify fuel treatment projects that benefit multiple resources.
Webinar recording and additional Q and A.
Federal and state agencies across Utah and the Great Basin have been actively treating pinyon and juniper woodlands to improve wildlife habitat, reduce fuel loads, and achieve watershed objectives. Increasingly these activities have been questioned by stakeholder groups and citizens who are concerned about the unintended consequences of such treatments. This webinar addresses some of the recent criticisms of pinyon-juniper treatment, sharing results of research on woody vegetation removal as well as identifying questions that still need to be answered through research and monitoring.
Speakers: Eric Thacker, Mark Brunson
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Spot fires caused by wind-blown burning embers are a significant mechanism of fire spread in the wildland and Wildland-Urban Interface (WUI). Fire spread and structure ignition by embers can be characterized by three major processes or mechanisms: ember production, ember transport, and ember ignition of fuel. This study investigates ember production from selected wildland and structural fuels under a range of environmental conditions through full-scale, intermediate-scale, and small-scale laboratory experiments.
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Abstracts of Recent Papers on Range Management in the West. Prepared by Charlie Clements, Rangeland Scientist, USDA Agricultural Research Service, Reno, NV.
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In this study we used the 79 western US national forests to examine tradeoffs between forest management scenarios targeting wildfire risk to the wildland urban interface (WUI) and those meeting agency convertible volume production targets. We quantified production frontiers to measure how the efficiency of meeting harvest volume targets is affected by prioritizing treatments to areas that transmit fire to the WUI. The results showed strong tradeoffs and scale effects on production frontiers, and more importantly substantial variation among planning areas and national forests. Prioritizing treatments to reduce fire transmission to the WUI resulted in an average harvest volume reduction of about 248m3 per ha treated. The analysis also identified opportunities where both management objectives can be achieved. This work represents the first large-scale tradeoff analysis for key management goals in forest and fuel management programs on national forests.
Researchers present results from a National Science Foundation-funded project studying management responses to Mountain Pine Beetle infestations in the western U.S. This research includes case studies of national forests and surrounding communities that were heavily affected by impacts from the beetle in Colorado, Montana, South Dakota, and Washington. The scale, scope, and public visibility of the beetle outbreak resulted in different responses in the four case study areas, including the use of different management approaches and policies. The rapid pace at which the epidemic spread also created challenges around managers’ inability to respond quickly enough. In this presentation, the scientists share findings on differences and similarities between how the different case studies responded to mountain pine beetle impacts and what policies, authorities, and approaches managers used to address beetle issues in their national forests.
Visit the Biomass Ready App website.
Biomass Ready is a quick and easy process to help teams design new community buildings that can better adapt to an uncertain energy future. Today the economics of biomass may not be favorable, but your community will own and operate your new building for decades, perhaps even a century. Over the lifetime of your building, your community may decide to install a biomass boiler system. Will your building be ready? Biomass Ready will help you avoid inadvertently creating barriers that make adding biomass in the future prohibitively expensive. If you can add a biomass system to your building without extensive deconstruction or demolition, your building is Biomass Ready. And Biomass Ready is simple enough that you can include it in your RFP (Request for Proposals) process – encouraging your bidders to compete on designing for future energy flexibility!
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This study compared seeding and not seeding mountain big sagebrush after juniper control (partial cutting followed with burning) in fully developed juniper woodlands (i.e., sagebrush had been largely excluded) at five sites, 7 and 8 yr after seeding. Sagebrush cover averaged ~ 30% in sagebrush seeded plots compared with ~ 1% in unseeded plots 8 yr after seeding, thus suggesting that sagebrush recovery may be slow without seeding after juniper control. Total herbaceous vegetation, perennial grass, and annual forb cover was less where sagebrush was seeded. Thus, there is a trade-off with herbaceous vegetation with seeding sagebrush. Our results suggest that seeding sagebrush after juniper control can accelerate the recovery of sagebrush habitat characteristics, which is important for sagebrush-associated wildlife. We suggest land manager and restoration practitioners consider seeding sagebrush and possibly other shrubs after controlling encroaching trees where residual shrubs are lacking after control.