1 / 26

Dust Definition Implementation

Dust Definition Implementation. Gerard Mansell, Julia Lester, Jason Conder ENVIRON International WRAP Carbon/Dust Conference May 24, 2006. Background: Dust Definition. Visibility standard references the “natural baseline”

brook
Download Presentation

Dust Definition Implementation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Dust Definition Implementation Gerard Mansell, Julia Lester, Jason Conder ENVIRON International WRAP Carbon/Dust Conference May 24, 2006

  2. Background: Dust Definition • Visibility standard references the “natural baseline” • How do you identify/quantify natural and anthropogenic dust sources/emissions? What mitigations are possible? • DEJF developed draft dust definition

  3. Category 2 Category 3 Category 1 Emissions due to anthropogenic influence Total Dust Emissions Emissions under healthy, natural conditions Mixed: Land impacted by native and non-native animals, dry lake shores / beds Pure Natural: Erupting volcanoes, sea spray, etc. Pure Anthro: construction, agriculture, roadways, etc. Feasibility Assessment Approach • Feasibility Report • related approaches, data/methodology resource assessment, Feasibility Assessment Protocol • Established 3 categories

  4. Partitioning of Category 3 Sources • Category 3 Partitioning, “Direct-Comparison” Approach • Compare Category 3 dust emissions at sites with actual or created “natural” reference sites (on site/source basis) • Reference areas, reference time periods • Ecosystem health as opposed to disturbance ranges • Modeling • Data information resources (Report, Appendix A) • Web location, cost, “owner,” description, spatial extent (location), user interface, user input, data format, spatial resolution, data export, user requirements, information need check-off, WRAP dust definition applicability score, and notes

  5. Feasibility Assessment Protocol • Identify the purpose and goals of the analysis • Conceptual Model and initial source rank order • Identify major Category 3 sources • Identify controls/mitigations, if desired • For major Category 3 sources, are existing methods/databases available to characterize, estimate, and/or partition the emissions? • If not, can the necessary methods/databases be developed and at what cost? • If the answers to 5 and/or 6 are yes, definition can be implemented

  6. Case Studies • Several potential case studies identified • 2 case studies identified through discussion with WRAP staff and the DEJF: • Saguaro West (SAWE) in Pima County Arizona • CoD / CoHA: 123 dust days of soil / coarse mass major contributors to 20% worst visibility days • Salt Creek Wilderness in New Mexico • CoD / CoHA • DRI CoD Backward Trajectory Analysis • Near Emissions Inventory • Interaction with the New Mexico SIP PilotProject

  7. Step 1: Purpose and Goals

  8. CM Geographic, geological, topographical, ecological, climatological and land use setting PM and Visibility setting Step 2: Conceptual Model WRAP Products/Tools: AoH, CoHA, CoD, In and Near Class 1 Areas, Near Emission Inventories State/Local Information Initial source ranking Major Category 3 Sources

  9. Salt Creek CM Building Blocks

  10. Step 2 (cont): Initial Ranking of Sources • Saguaro West • Most significant: Windblown from shrub land (Cat. 3) • Major: Other windblown (Cat. 3), agriculture (Cat. 1) • Unknown: Emissions and/or the natural “disturbance” due to burrowing animals • Salt Creek Wilderness • Most significant: Windblown from shrub/grass lands (Cat. 3) • Major: Other windblown (Cat 3.); agriculture, construction, road dust (Cat. 1) • Other: Emissions and/or the natural “disturbance” due to burrowing animals

  11. Step 3: Major Category 3 Sources • Saguaro West: Windblown (shrubland) • Salt Creek (with current inventory) • Windblown (shrubland & grasslands) • Others: to be determined

  12. Step 4: Mitigations / Control • Identify possible mitigations and controls that may be applied to Category 1 and specific Category 3 sources • Impact of controls/mitigations on Category 3 sources related to emission partitioning • Saguaro West – Not part of case study • Salt Creek Wilderness • Controls/ mitigations identified through the NM SIP Pilot Project

  13. Step 5: Resource Availability for Category 3 Sources • For major Category 3 contributors, are resources available to characterize, estimate, and/or partition the emissions? • Data and Model Resource Identification • Dust source characterization • Site-specific dust emission estimates • Emission partitioning

  14. Step 5: Emission Estimates • Saguaro: Rough, based on 12x12km estimates from windblown dust model • Salt Creek Wilderness: Refined inventory, based on WRAP modeling data, revised spatial allocation, local data, Causes of Haze (CoH) analyses (DRI), etc.

  15. Step 5: Emission Estimates WRAP modeling PM10 dust emission inventory data (includes TFs); spatially allocated to 100-km analysis area; reflects spatial allocation based on 1992 NLCD

  16. Step 5: Emission Estimates WRAP county-level PM10 dust emission inventory data (tpy)

  17. Refined Emission Estimates • Refine emission estimates through spatial allocation using updated LULC data • Incorporate local available data • Work is on-going • Utilize CoH analysis from DRI

  18. Current LULC for spatial allocation (1992 NLCD)

  19. Updated LULC for spatial allocation (2000 NALC)

  20. Spatial allocation to 100-km analysis area

  21. PM10 Dust emissions allocated to 100-km analysis area using 2000 NALC-based surrogates • Spatial allocation to 100-km analysis area

  22. Consider dust emission source areas based on back-trajectories for SACR • DRI Back-trajectory Analysis

  23. Step 5: Category 3 Partitioning • Saguaro West: Information available to generally identify impacted areas (e.g. unpaved road and grazing areas) and to identify a “natural” reference area, but no current analysis performed • Salt Creek Wilderness: • Results pending

  24. Dust Emissions from Burrowing Animals • Excavate as much as 5,100 tons soil/mi2•year • If fully entrained, may generate as much as 6 metric tons PM10 /mi2•year (Saguaro West) • Burrowing activity affects vegetation cover at landscape scales • In certain areas, there may be no additional emissions even if anthropogenic disturbances are present Botta’s pocket gopher Thomomys bottae

  25. CONCLUSIONS • Dust definition implementation feasible • No “one-size-fits all” approach • Wide variety of information resources available • Key challenges • Reconciling different emission estimates • Partitioning Category 3 sources • Identifying reference areas / time periods • Quantifying impact of natural disturbances • Assessment Report and draft Saguaro Study available • Provides a process (and a tool – Conceptual Model) for integrating WRAP tools/projects during SIP development – NM SIP Pilot Project • Feedback to emissions models

More Related