INPUT GROUP: 12 -- Misc. Dispersion and Computational Parameters Parameter Description Value Vertical dispersion constant - stable conditions 0.01 CONK1 Vertical dispersion constant - neutral/unstable conditions 0.1 CONK2 Downwash scheme transition point option (<0 = Huber-Snyder, 1.5 = Schulman-Scire, 0.5 = ISC) 0.5 TBD Beginning land use category for which urban dispersion is assumed 10 IURB1 Ending land use category for which urban dispersion is assumed 19 IURB2 Land use category for modeling domain 20 ILANDUIN Roughness length for modeling domain (m) .25 Z0IN Leaf area index for modeling domain 3.0 XLAIIN Elevation above sea level (m) .0 ELEVIN Meteorological station latitude (deg) -999.0 XLATIN Meteorological station longitude (deg) -999.0 XLONIN Anemometer height (m) 10.0 ANEMHT Lateral turbulence format (0 = read sigma-theta, 1 = read sigma-v) 1 ISIGMAV Mixing heights read option (0 = predicted, 1 = observed) 0 IMIXCTDM Slug length (met grid units) 1 XMXLEN Maximum travel distance of a puff/slug (met grid units) 1 XSAMLEN Maximum number of slugs/puffs release from one source during one time step 99 MXNEW Maximum number of sampling steps for one puff/slug during one time step 99 MXSAM Number of iterations used when computing the transport wind for a sampling step that includes gradual rise 2 NCOUNT Minimum sigma-y for a new puff/slug (m) 1 SYMIN Minimum sigma-z for a new puff/slug (m) 1 SZMIN Maximum sigma-z allowed to avoid numerical problem in calculating virtual time or distance (m) 5000000 SZCAP_M Minimum turbulence velocities sigma-v (m/s) 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.37, 0.37, 0.37, 0.37, 0.37, 0.37 SVMIN Minimum turbulence velocities sigma-w (m/s) 0.2, 0.12, 0.08, 0.06, 0.03, 0.016, 0.2, 0.12, 0.08, 0.06, 0.03, 0.016 SWMIN Divergence criterion for dw/dz across puff (1/s) 0, 0 CDIV TIBL module search radius (met grid cells) 4 NLUTIBL Minimum wind speed allowed for non-calm conditions (m/s) 0.5 WSCALM Maximum mixing height (m) 3000 XMAXZI Minimum mixing height (m) 50 XMINZI Emissions scale-factors temperature categories (K) 265., 270., 275., 280., 285., 290., 295., 300., 305., 310., 315. TKCAT Wind speed profile exponent for stability classes 1 to 6 0.07, 0.07, 0.1, 0.15, 0.35, 0.55 PLX0 13/06/2022 CALPUFF View Version 9.0.0 by Lakes Environmental Software Page 8 of 10
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