Rangeland Burning (Non-Federal Lands) Methodology

1
Rangeland Burning(Non-Federal Lands)Methodology

• Phase 2 Fire Emission Inventory
• WRAP FEJF

2
Rangeland Burning

• WRAPs first attempt to quantify rangeland
  burning for regional modeling
• Federal rangeland burning assumed to be in
  wildfire or prescribed fire activity data
• No centralized reporting system for non-federal
  (state, tribal, and private) burning
• Objective for geographically complete WRAP-wide
  emission inventory
• First cut based on FEJF Emission Task Team expert
  judgment
• Status Emissions calculated, event allocation
  and model ready file export still to do

3
Parameters

• First-cut non-federal rangeland acres burned by
  state provided by Pat Shaver
• Rangeland acres per county summarized from NRCS
  National Resource Inventory (1997)
• 1.75 ton/acre fuel loading selected(loading
  ranging from 1.5 2.0 ton/acre)
• WRAP Conservation Range Program (CRP) emission
  factor suite selected
• 17 lb/ton PM2.5, 18 lb/ton PM10, 12 lb/ton VOC

4
Top-Down Processing Overview

• Calculate emissions for each state
• Allocate state-wide activity and emissions to
  county level
• Allocate annual activity estimates to monthly
  basis
• Split monthly totals into realistically sized
  events
• Assign daily-ized events to date in month and
  rangeland location in county
• Export to model-ready format

5
Non-Federal Rangeland Activity
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Non-Federal Rangeland Activity
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Daily Event Allocation
Spatial Allocation
Event Allocation
PlumeClass Size Range Probability Packet (tons PM2.5)
1 0 1 0.975 0.064
2 1 - 10 0.024 2.202
3 10 - 100 0.0007 16.641
Blackout days not relevant to non-federal
rangeland burning
8
Preliminary Summary
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Natural / Anthropogenic Categorization Questions

• Categorize non-federal rangeland burning
  consistent with WRAP N/A Policy
• Select custom Source Classification Code (SCC) to
  identify non-federal rangeland burning as source
  category 2810016000?
• SCCs for Fire identified as either natural or
  anthropogenic
• SCCs coordinated with regional modeling center to
  track nat/anthro categorization for fire

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Method Limitations

• Activity based on ETT expert judgment
• Could gather further data
• Could revisit percent burned strategy
• Activity not specific to potential sub-state
  burning practice differences
• Single fuel loading value
• Simulated events calibrated to Ag statistics