assessment and calculations of plume rise for forest fires during texas air quality study period
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Assessment and Calculations of Plume Rise for Forest Fires during Texas Air Quality Study period. Uarporn Nopmongcol Dept. of Chemical Engineering The University of Texas Austin, Texas. adfd. Wild fires. - PowerPoint PPT PresentationTRANSCRIPT
Assessment and Calculations of Plume Rise for Forest Fires during Texas Air Quality
Study period.
Uarporn Nopmongcol
Dept. of Chemical Engineering
The University of Texas
Austin, Texas
adfd
Fires consumed vegetation on 1.6 and 1.7 million acres of lands in 1996 and 1997, respectively
Contribute PM, CO, and ozone precursors to atmosphere
Emission Inventory for Texas Air Quality Study (TexAQS) : August 1st- September 30th in 200
Wild fires
Why do we care plume rise??
Vertical displacement before dispersion process
not stack area sources
evaluate 1 out of 6 models and integrate results into CAMx
CAMx
Eulerian photochemical dispersion model that allows for integrated assessment of gaseous and particulate air pollution
Goals
Incorporate grid information to fire locations using ArcGIS
Extracting meteorological data from CAMx & MM5
Visual Basic Programming of Fire plume calculation
Fire Plume Model
Brown, 1999 , U. of Illinois
Atmospheric dispersion and air quality impacts from fires/smoke sources
Plume rise (Final Rise) - Brigg’s two-thirds law
Equations : Fire Plume Model
Stable Condition
Neutral Condition
Unstable Condition
Methodology : Input needed
Input Fireplume Model CALPUFF Model Meteorological data Temperature
Layer 1-2 in CAMx stucture
Layer 1-14 in CAMx stucture
Horizontal Wind Layer 3 in CAMx stucture
Layer 1-14 in CAMx stucture
Pressure Layer 1-14 in CAMx stucture
Mixing Height Heat Flux at Surface Plume Characteristics Temperature of release Exit vertical velocity Heat Release Acres Burned
Input Fireplume Model CALPUFF Model Meteorological data Temperature
Layer 1-2 in CAMx stucture
Layer 1-14 in CAMx stucture
Horizontal Wind Layer 3 in CAMx stucture
Layer 1-14 in CAMx stucture
Pressure Layer 1-14 in CAMx stucture
Mixing Height Heat Flux at Surface Plume Characteristics Temperature of release Exit vertical velocity Heat Release Acres Burned
Emission Inventory
Fire Characteristics
Plume temperature : 900-1600 K Heat release & Acres burned : Emission Inventory during
Texaqs period by CEER
Fire ID Fire Date/Start Date LatDD LongDD Total Acres
Burned Heat_Release
(Btu)/day 1085 31-Aug-00 30.5210 -93.0480 4000 2.15E+11 1033 30-Aug-00 30.2590 -95.0060 1000 8.42E+10 1094 01-Sep-00 30.9019 -93.5894 793.2 6.68E+10
Sample of fire events modeling episode between Aug 22nd- Sep 1st HG-BPA domain large fire > 500 acres
Build gridExcel Ascii
Add heading
ASCII
Grid
•spatial analysis
•convert
•raster to feature
Define projection
WOO HOO !!
Sample of fire eventsUsing Arc GIS to assemble the data
Fire ID Fire Date/Start
Date LatDD LongDD Total Acres
Burned Heat_Release
(Btu)/day X1 Y1 X2 Y2
1033 30-Aug-00 30.2590 -95.0060 1000 8.42E+10 31 45 66 77
1085 31-Aug-00 30.5210 -93.0480 4000 2.15E+11 77 56 112 88
1094 01-Sep-00 30.9019 -93.5894 793.2 6.68E+10 64 65 99 97
Methodology : Input Obtaining
Meteorological Data
CAMx binary input files - U, T
- Fortran Coding
MM5 binary output files : - Heat flux at surface, mixing height - Fortran Coding
- VB v.6 Coding , Greenwich to std time
Programming
All Input data is in Microsoft Access
VB v. 6 programming
Results: Both burning period and Temperature do not effect plume rise
Results and DiscussionFireplume calculations
Aug 30, Fire ID 1033 , 1000 acres
0
200
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1600
0 2 4 6 8 10 12 14 16 18 20 22time
plu
me
ris
e (
m.)
65
78
4
10
11
3
9
Fireplume calculations Sep 1, Fire ID 1094 , 800 acres
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1600
0 2 4 6 8 10 12 14 16 18 20 22time
plu
me
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e (
m.) 11
54
6
3
2
Conclusion & Future work
Conclusion : suggest low plume rise at night time and high peak during late afternoon.
Further study on different models is necessary
Acknowledgements
Dr. David Maidment Dr. Richard Corsi Dr. Dave T. Allen , CEER Dr. Yosuke Kimura, CEER CEER crews : Anil, Victoria, Matt
Questions?
Be my guest!