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The Impact of Land Use Changes on the Future Tree Distributions

The Impact of Land Use Changes on the Future Tree Distributions. Presented by Jin-Oh Kim Community and Regional Planning School of Architecture University of Texas at Austin. Introduction.

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The Impact of Land Use Changes on the Future Tree Distributions

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  1. The Impact of Land Use Changes on the Future Tree Distributions Presented by Jin-Oh Kim Community and Regional Planning School of Architecture University of Texas at Austin

  2. Introduction Biogenic Volatile Organic Compounds (BVOC) forms ozone in ground-level when mixed with nitrogen oxides from anthropogenic sources. Differences in climatology including temperature and cloud cover, and land use strongly affect biogenic emissions. Few studies have focused on the relationship between land use patterns and its impact on spatial variation in biogenic emissions densities.  

  3. Relationship of Trees and Land Development in Air Quality Context Natural Environment (soil, water, temperature etc.) Temperature, Cloud cover + Land Development Trees (oak) BVOC Biogenic Volatile Organic Compounds Nitrogen Oxides Disaster (fire, flood, etc), disease (oak wilt) Volatile Organic Compounds HumanHealth VOC

  4. Problem Statements • In Texas, vegetation and forests in eastern and central Texas are the main sources of emissions of BVOC. • Even though most plants emit some VOCs, the largest emitters are oaks, pines, sweet gums, eucalyptus, and poplars. High Emission Density Density Map of Biogenic Emission in Texas in 1997 (EPA)

  5. Objectives 1. Predict Future Tree Distributions based on Land Use Scenarios 2. Understanding the Impact of Land Development on Oak Trees 3. Recommendations to Improve Land use Scenarios

  6. Research Areas Central Texas region (Travis, Williamson, Bastrop, Hays, Caldwell) Data Sources Texas Vegetation Map (From Dr. David Allen) Land Development Scenario Maps (Dr. Barbara Parmenter, Envision Central Texas Project) USDA Soils Data for Central Texas Area (Statsgo State Soil Database) Color infra-red Digital Orthophoto (TNRIS, http://www.tnris.state.tx.us/)       

  7. Analysis of Vegetation Types in Central Texas Post Oak, Woods, Forest and Grass Live Oak, Ashe Juniper Parks Post Oak Woods and Forest Live Oak, Mesquite, Ashe Juniper

  8. Impact of Land Development on Trees Scenario A Scenario B Tree Distribution in 2001 Scenario C Scenario D Land Development Scenarios Proposed by Envision Central Texas Project

  9. Projection of Future Land Development Impact on Trees Scenario A Scenario B Trees in 2001 Scenario D Scenario C

  10. Future Land Development Impact vs. Trees Scenario A Scenario B Downtown Town Residential Activity Center Large Lot Commercial Industrial Scenario D Scenario C

  11. Tree Existing Areas Predicted to be Developed Scenario A Scenario B Downtown Town Residential Activity Center Large Lot Commercial Industrial Scenario D Scenario C

  12. Development Types where Trees exist under Scenarios Scenario B Scenario A 1. Rural 2. Large Lot 3. Conservation rural 1. Residential 2. Rural 3. Large Lot Scenario D Scenario C 1. ConservationRural 2. Activity Center 3. Rural 1. Large Lot 2. Residential 3. Rural

  13. Prediction of Tree existing Areas Pervious Cover Assumption (%) Tree Area to be Preserved (under Scenarios) Tree Keeping Assumption (%) Actual Area of Trees to be Preserved Arc GIS Raster Calculations

  14. Trees predicted to be preserved for each development type under Scenario A Assumption Assumption Qualitative Research needs to be conducted

  15. Areas where Trees exist predicted to be developed under Scenario A

  16. Oak Tree Distributions 1. Post Oak, Woods, Forest and Grass 2. Live Oak, ashe Junifer Parks 3. Post Oak Woods and Forest

  17. Soil Composition in Oak Tree Areas

  18. Land Development Impact on Oak Trees Scenario A Scenario B Scenario D Scenario C

  19. Future Development vs. Oak trees Scenario A Scenario B Scenario D Scenario C

  20. Future Development within Oak tree area Scenario A Scenario B Scenario D Scenario C

  21. Conclusion & Future Work • Some highly urbanized area was revealed in dense oak tree areas • Need to focus specific types of land development to avoid air quality deterioration

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