Starting with version 2.2, SMOKE contains an approach for computing plume rise for wildfire/prescribed fires using the Bluesky Pouliot-Godowitch plume rise algorithm (http://www.epa.gov/ttn/chief/conference/ei14/session12/pouliot.pdf). In SMOKE version 2.2, SMOKE can compute hourly plume rise from precomputed hourly heat flux, fuel loading and area burned data using the Bluesky CONSUME model. The SMOKE preprocessor Bluesky2Inv that converts the output from the CONSUME model into SMOKE-readable annual and daily inventory files (Section 5.3.4, “BlueSky2Inv”).
Starting with SMOKE version 2.3, SMOKE can compute hourly plume rise from an intenally computed heat flux using area burned and fuel loading data. This approach allows SMOKE to compute hourly heat flux based upon daily area burned, fuel loading, material burned and a constant default heat content (8000 BTU/lb) (Equation 1). The daily heat flux and emissions are temporally allocated to hourly values based upon the duration of the fire (begining and ending hours).
Heat Flux (BTU/hr) = [ Area Burned (acre/day) x Fuel Loading (tons/acre) x Heat Content (BTU/lb) x (2000lb/ton) ] / Duration of fire (hr/day)
The SMOKE plume rise requires two ORL formatted files for wildfire/prescribed fires. The master #ORL FIRE file (Section 8.2.10.5, “ORL FIRE Format”) contains the fire characteristics including country/state/county code, fire idenfication code, geographic coordinate, fire name, heat content, material burned and NFDRS code. The day-specific #ORL FIREEMIS file (“Section 8.2.8.3, “ORL FIRE Emission Format””) includes daily pollutant emissions, area burned, fuel loading, and fire begining and ending time.
NOTE: SMOKE requires that the fire inventory pollutant names are copied to the Chemical Absrtracts Service ( CAS ) number
column in the inventory table (INVTABLE) file (See Section 8.10.3, “INVTABLE: Inventory table”).
To compute plume rise for fires using SMOKE, following these steps. Add the fire inventory variables to the INVTABLE file:
HFLUX HFLUX Y 1 N N N N 0 tons/yrHEATCONTENT HEATCONTENT Y 1 N N N N 0 tons/yrFUEL_LOAD FUEL_LOAD Y 1 N N N N 0 tons/yrACRESBURNED ACRESBURNED Y 1 N N N N 0 tons/yrBEGHOUR BEGHOUR Y 1 N N N N 0 tons/yrENDHOUR ENDHOUR Y 1 N N N N 0 tons/yr
Run Smkinven with these settings,
Set RUN_SMKINVEN to Y
Set IMPORT_AVEINV_YN to Y
Set CHECK_STACKS_YN to N
Do not run Elevpoint,
Set RUN_ELEVPOINT to N
Set SMK_ELEV_METHOD to 0
Set SMK_PING_METHOD to 0
Run Laypoint with these settings, See more detail at Section 6.6.1.1, “Plume rise calculation for fires”.
Set RUN_LAYPOINT to Y
Set FIRE_PLUME_YN to Y
Set HOURLY_FIRE_YN to Y
Set SMK_SPECELEV_YN to N
Run Smkmerge with theses settings,
Set RUN_SMKMERGE to Y
Set SMK_ASCIIELEV_YN to N
Set these multiple program control settings.
Set DAY_SPECIFIC_YN to Y
Set EXPLICIT_PLUMES_YN to N
Set SMK_PING_METHOD to 0
Set QA_TYPE to part2