Fuel Management Objectives within Dry Forest Landscapes on the Okanogan-Wenatchee NF Dr. Richy J....
Transcript of Fuel Management Objectives within Dry Forest Landscapes on the Okanogan-Wenatchee NF Dr. Richy J....
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Fuel Management Objectives within Dry Forest Landscapes on
the Okanogan-Wenatchee NF
Dr. Richy J. HarrodOkanogan-Wenatchee National Forest
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Ecological Restoration
• Ecological restoration aims to enhance the resilience and sustainability of forests through treatments that incrementally return the ecosystem to a state that is within a historic range of conditions (Landres et al. 1999).
• The process of assisting the recovery and management of ecological integrity (Society for Ecological Restoration).
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Okanogan-Wenatchee NFDry Forest Strategy
• 2020.3 – FSM Policy1.All resource management programs have a
responsibility for ecological restoration…
• Emphasize restoration efforts in the dry and mesic forests
• Provided recommendations for types of and placement of treatments
• Key emphasis on integration of resource values
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Relatively open stands of ponderosa pine developed dense Douglas-fir, white fir, and grand fir understories.
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Goals of Fuel Management• Change how fire behaves within stands
and across landscapes• Create stands and landscapes that are
resilient to fire• Mitigate fire hazard in the
wildland/urban interface
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Fuel Management Objectives• Reduce surface fuels
• Increase height to live crown
• Decrease crown density
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Fuel Management Objectives• Treatment sequence
– Harvest, pile, pile burn, underburn– Thin, pile, underburn– Underburn
• Can use FCCS to determine sequence
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OW018
OW005
OW006
OW003
OW009
OW004
OW002
OW07OW001
0-15 15-25
none
none
none
none
none
none
OW012
OW010
OW008
OW011
25-40
OW013
OW015
none
OW019
OW014
PCT & Rx burn
40-80
PCT & Rx burn
none
OW017
80-150
OW020
OW022
OW023
PCT &
RX bur
n
none
none
PCT & Rx burn
none
PCT & Rx burnnone
PCT & Rx burn
OW025
OW027
OW028
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Potential Dry Douglas-fir, Ponderosa Pine, Grand Fir Fuelbed Series Pathway
Age
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OW026
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OW031
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OW021
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+no treat
Select cut
+no treat
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Reduce Surface Fuels• In dry forest types, average of 3-5
tons/acre within stands
• Loading should be discontinuous, variability is desired.
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Reduce Surface Fuels• Goal is to reduce flame length
– A measure of fire intensity which determines fire severity
– Long lengths leads to high torching potential
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Reduce Ladder Fuels• Decrease potential for torching
– Eliminate branches on large trees– Reduce understory density
• Variability throughout stand is desirable
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Decrease Crown Density• Reduce potential for crown fire
– Harvest or thinning– Torching through prescribed fire
• Variability is desirable• Retain large fire resistant trees!
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Hard to Meet Restoration Objectives
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LANDSCAPE CHARACTERISTICS
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Priority Treatment Areas-developed using AnalyticalHierarchy Process
•Weight factors•Applied at the landscapescale.
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Restoration ApproachDetermine where on the landscape to place
your treatments.
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Summary• Treatments need to be strategically placed on
the landscape• Stand level treatments should focus on three
principles of fuel management• Treatments need to consider the importance of
spatial patterns, fire tolerant structures, and species composition
• Important to integrate resource objectives, not about reducing fuels everywhere.