delleker north hazardous fuel reduction fuels & fire behavior assessment
DESCRIPTION
Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment. Project Funded by the Plumas NF with USDA Forest Service’s “Community Protection” program funds to reduce fuels on 50 acres. Plumas County. Wildland Fire Behavior Factors. * Fire Intensity - (Flame Length (FL) in feet) - PowerPoint PPT PresentationTRANSCRIPT
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Delleker North Hazardous Fuel ReductionFuels & Fire Behavior Assessment
Project Funded by the Plumas NF with USDA Forest Service’s “Community Protection” program funds to reduce fuels on 50 acres.Plumas County
![Page 2: Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment](https://reader036.vdocuments.us/reader036/viewer/2022062422/56814274550346895dae9b09/html5/thumbnails/2.jpg)
Wildland Fire Behavior Factors
* Fire Intensity - (Flame Length (FL) in feet)
* Crowning Potential - (FL + Crown to base height)
* Spotting Potential - (FL + Crowning = ember production)
* Resistance to Control (RTC) - (FL + spotting + volume of fuel)
Plumas County
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test
Fuelbed Factors Affecting Intensity, Crowning & Spotting Potential
Plumas County
• Fuel Loading (Tons/acre by size)• Fuel Arrangement (Horizontal & Vertical)
• Fuel Layers (Surface-Ladder-Canopy)
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Delleker North HFRMechanical Commercial Thinning of Stands
Surface Fuels –Scattered brush and heavy pockets of needles were disturbed, masticated and compacted in operations.Ladder Fuels – Trees were mechanically thinned.
Small trees were cut and chipped as biomass Trees greater than 12-14” were harvested as sawlogs
Canopy Fuels – Trees were thinned and harvested.
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Delleker North HFRCommercial Thinning of Stands
Pre-Treatment - Plot 1
Expected Fire Conditions Surface Flame Length = <4 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = Moderate
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Delleker North HFRCommercial Thinning of Stands
Post Treatment - Plot 1
Expected Fire Conditions Surface Flame Length = 2-4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low
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Delleker North HFRCommercial Thinning of Stands
Pre-Treatment - Plot 2
Expected Fire Conditions Surface Flame Length = 4-5 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = High
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Delleker North HFRCommercial Thinning of Stands
Post-Treatment - Plot 1
Expected Fire Conditions Surface Flame Length = <4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low
![Page 9: Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment](https://reader036.vdocuments.us/reader036/viewer/2022062422/56814274550346895dae9b09/html5/thumbnails/9.jpg)
Delleker North HFRCommercial Thinning of Stands
Pre-Treatment - Plot 3
Expected Fire ConditionsSurface Flame Length = 4-5 FeetCrowning Potential = HighSpotting Potential = HighResistance to Control = High
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Delleker North HFRCommercial Thinning of Stands
Pre-Treatment - Plot 3
Expected Fire Conditions Surface Flame Length = 4 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Moderate
![Page 11: Delleker North Hazardous Fuel Reduction Fuels & Fire Behavior Assessment](https://reader036.vdocuments.us/reader036/viewer/2022062422/56814274550346895dae9b09/html5/thumbnails/11.jpg)
Surface Fuels – Brush and scattered trees were rearranged in the masticating operation.
Ladder Fuels –Trees were mechanically thinned by a masticator to a spacing of approximately 20 feet.
Canopy Fuels –Due to stand conditions, no trees harvested as sawlogs.
Delleker North HFRMastication of non-commercial stands
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Delleker North HFRMastication of non-commercial stands
Pre-Treatment
Expected Fire Conditions Surface Flame Length = 4-6 Feet Crowning Potential = High Spotting Potential = High Resistance to Control = High
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Delleker North HFRMastication of non-commercial stands
Post Treatment
Expected Fire Conditions Surface Flame Length = 2-3 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low
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Surface Fuels – Pockets were rearranged in masticating operation.Ladder Fuels – Mechanically thinned in earlier harvesting activity.Canopy Fuels - Mechanically thinned in earlier harvesting activity.
Delleker North HFRMastication of Prior Activity Slash in
Commercially Thinned Stands
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Delleker North HFRPrior Activity Slash in
Commercially Thinned Stands
Expected Fire Conditions Surface Flame Length = 4-6 Feet Crowning Potential = Low Spotting Potential = Low Resistance to Control = Moderate
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Delleker North HFRMastication of Prior Activity Slash in
Commercial Thinning Stands
Expected Fire Behavior Surface Flame Length = 1 foot Crowning Potential = Low Spotting Potential = Low Resistance to Control = Low
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Pre Existing Slash
Slash following Mastication
Fuelbed ChangesFuelbed height was lowered, fine fuels were broken down & dirt was mixed into the fuel.Projected flame lengths dropped from 4-6 feet to 1 foot
Delleker North HFRMastication of Prior Activity Slash in Commercially Thinned Stands