1. Wyoming WISE Agricultural Burning EI Development Day 1 – 2:45p Wyoming WISE Agricultural Burning EI Development

2. WISE Project Overview Wyoming Inventory System for Emissions Statewide 2002 emission inventory for stationary, area, mobile, biogenic, and fire sources Support regional haze obligations and in-state rule making Gather activity data and calculate emissions for wildfire, prescribed burning, and agricultural burning Building on methods developed by WRAP FEJF Estimate agricultural burning activity from scratch Note: WISE project is not complete, results presented here are preliminary

3. Agricultural EI Objectives Event based: date, location, crop type, and size of burn event in acres Monthly summary: month, county, crop type, total acres burned “Data Quality” tags in database distinguish –“Event quality” suitable for modeling or –“Summary” suitable for analysis on monthly/county basis

4. Agricultural Burning Activity: Bottom-Up Survey Mail survey to 75 Ag contacts gathered by WY-DEQ Request listing of events for 2002 or estimate of acres per crop by month for 2002 Result: 31 responses, 16 quantitative, 38 events/summaries totaling 1,577 acres for 2002

5. Agricultural Burning Activity: Top-Down Calculation Compile acres harvested by county by crop for (USDA NASS 2002 Agriculture Statistics) Identify crop-specific factors for percent-burned of acres harvested. Identify months of burning by crop (a la WRAP 1996 Ag EI by ERG) –Glean from survey responses –Follow up with county ag extension officers, irrigation districts, WY-NASS statistician, others –Zero out counties for which no burning declared Apply factors to NASS data to arrive at acres burned per month per county

6. Agricultural Burning Activity: Non-Residue Burning Categories Canals and ditches: –Length of irrigation systems allocated to county (Wyoming Irrigation Systems Report, WWDC 2003) –Surveys and Follow up: Average width, length of non- district ditches, percent burned factor CRP: One burn in surveys, no pattern identifiable from follow up Fenceline: Known to occur via follow up, but no pattern identifiable

7. Agricultural Activity – by Crop

8. All Fire Activity – By Source

9. Top-Down Activity Method: Comparison of Percent-Burned Activity levels checked against other percent-burned factors –ERG report for WRAP 1996 Agricultural EI Percent-burned factors from different states –Air Sciences’ compilation of “high, med, low” factors based on various “what if” scenarios Change in use of burning Change in crop production Serves as QC and scenario tool

10. Agricultural Activity – by Scenario