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Road_dust_parameter_table_v12_params.txt
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Road_dust_parameter_table_v12_params.txt
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NORTRIP model text parameter file (params)
-----------------------------------------
Tab seperated. 48 and 24 characters
Check log file to assess proper reading
-----------------------------------------
ROAD DUST SUB-MODEL PARAMETERS
Road wear
W0,roadwear (g km-1 veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 14.4 0.48 0.48
Light (li) 2.88 0.096 0.096
Parameters for speed dependence a1 a2 a3 Vref,roadwear Vmin,roadwear
Equation W=W0*(a1+a2*(V/Vref)a3) 0 1 1 70 30
Tyre wear
W0,tirewear (g km-1 veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 1.0 1.0 1.0
Light (li) 0.1 0.1 0.1
Parameters for speed dependence a1 a2 a3 Vref,tyrewear Vmin,tyrewear
Equation W=W0*(a1+a2*(V/Vref)a3) 0 1 1 70 30
Brake wear
W0,brakewear (g km-1 veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 0.10 0.10 0.10
Light (li) 0.01 0.01 0.01
Parameters for speed dependence a1 a2 a3 Vref,brakewear Vmin,brakewear
Equation W=W0*(a1+a2*(V/Vref)a3) 1 -0.75 1 120 30
Snow depth wear threshold
Parameter Value
sroadwear,thresh (mm w.e.) 6
Pavement type scaling factor
Number of pavement types 4
Index(p) Name hpave (p)
1 NBM19_SS11 3.6
2 NBM14_SS11 2.9
3 NBM10_SS11 2.32
4 NBM7_SS11 1.9
Driving cycle scaling factor
Number of driving cycle types 4
Index(d) Name hdrivingcycle (d)
1 Reference 1
2 Urban 1.5
3 Highway 0.5
4 Congested 2
Road suspension
f0,suspension(veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 6.0e-05 6.0e-05 6.0e-05
Light (li) 1.5e-06 1.5e-06 1.5e-06
Parameters for speed dependence a1 a2 a3 Vref,suspension Vmin,suspension
Equation fsus=fsus0*(a1+a2*(V/Vref)a3) 0 1 1 50 30
Suspension scaling factors
Source PMall - PM200 PM200 - PM10 PM10 - PM2.5 PM2.5
h0,roadwear 1 1 1 1
h0,tyrewear 1 1 1 1
h0,brakewear 1 1 1 1
h0,sand 10 1 1 1
h0,depo 1 1 1 1
h0,fugitive 1 1 1 1
h0,exhaust 1 1 1 1
h0,salt(1) 1 1 1 1
h0,salt(2) 1 1 1 1
h0,q_road 0 1 1 1
Abrasion factor
fabrasion (veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 1e-05 1e-05 1e-05
Light (li) 1e-06 1e-06 1e-06
Reference speed Vref,abrasion (km/hr) 60
Abrasion scaling factor PMall - PM200 PM200 - PM10 PM10 - PM2.5 PM2.5
h0,abrasion 1 0 0 0
Crushing factor
f0,crushing (veh-1) Studded tyres (st) Winter tyres (wi) Summer tyres (su)
Heavy (he) 1e-05 1e-05 1e-05
Light (li) 1e-06 1e-06 1e-06
Reference speed Vref,crushing (km/hr) 60
Crushing scaling factor PMall - PM200 PM200 - PM10 PM10 - PM2.5 PM2.5
h0,crushing 1 0 0 0
Sources participating in abrasion and crushing
Source Abrasion Crushing
p0,roadwear 0 0
p0,tyrewear 0 0
p0,brakewear 0 0
p0,sand 1 1
p0,depo 1 1
p0,fugitive 1 1
p0,exhaust 0 0
p0,salt(1) 0 0
p0,salt(2) 0 0
Direct emission factor
Source parameter Value
f0,dir-roadwear 0.5
f0,dir-tyrewear 0.5
f0,dir-brakewear 0.5
f0,dir-crushing 0
f0,dir-abrasion 0
f0,dir-exhaust 0.98
Fractional size distribution
Source PMall PM200 PM10 PM2.5
fPM,roadwear 1 1 0.28 0.022
fPM,tyrewear 1 1 0.1 0.01
fPM,brakewear 1 1 0.8 0.5
fPM,sand 1 0.05 0.008 0.002
fPM,depo 1 1 0.28 0.022
fPM,fugitive 1 1 0.28 0.022
fPM,exhaust 1 1 1 1
fPM,salt(1) 1 1 0.28 0.022
fPM,salt(2) 1 1 0.28 0.022
fPM,crushing 1 1 .16 0.04
fPM,abrasion 1 1 1 0.2
Reference speed Vref,PM-fraction (km/hr) 50
cPM-fraction (km/hr)-1 0.0
Wind blown dust emission factors
Parameter Value
twind (hr) 12
FFthresh (m/s) 5
Activity efficiency factors for dust and salt
Efficiency parameter dust PMall - PM200 PM200 - PM10 PM10 - PM2.5 PM2.5
hploughing-eff 0.1 0.01 0.01 0.01
hcleaning-eff 0.001 0.001 0.001 0.001
hdrainage-eff 0.002 0.002 0.002 0.002
hspraying-eff 0.1 0.1 0.1 0.1
Efficiency parameter salt Salt(1) Salt(2)
hploughing-eff 0.3 0.3
hcleaning-eff 0.2 0.2
hdrainage-eff 1 1
hspraying-eff 1 1
Deposition velocity
PM200 - PM10 PM10 - PM2.5 PM2.5
wx (m/s) 0.003 0.001 0.0005
Concentration conversion limit values
Parameter Value
NOX,concentration-min (µg/m3) 5
NOX,emission-min (g/km/hr) 50
MOISTURE SUB-MODEL PARAMETERS
Spray and splash factors
Parameter Water Snow Ice
f0,spray (veh-1) (he) 1.0e-04 1.0e-04 5.0e-05
f0,spray (veh-1) (li) 2.0e-05 2.0e-05 1.0e-05
Vref,spray (km/hr) 80 80 80
groad,sprayable-min (mm) 0.05 0.05 0.05
Power law factor for spray aspray 2 2 2
Vthresh,spray (km/hr) 40 40 40
Drainage parameters
Parameter Value (min all types) Val (thresh for type 3)
gdrainable (mm) 0.6 0.20
Snow retainment limit (mm) 2
Drainage time scale(hr) 12
Ploughing parameters
Parameter Water Snow Ice
Ploughing efficiency for snow removal 0.1 0.8 0.3
Ploughing threshold (mm) 100 3 3
Energy balance parameters
Parameter Value
groad,evap-thresh (mm) 0.02
Roughness lengths z0m,z0t,z0q (mm) 10 1 0.1
Snow albedo 0.6
Suburface slab depth (m) 0
Suburf temperature average time (h) 48
Subsurface parameters s (kg/m3) cs (J/kg/K) ks (W/m/K)
Subsurface parameters 2400 800 3.0
Traffic turbulent exchange and heat flux Heavy (he) Light (li)
atraffic (veh-1) 0.01 0.001
Hveh (W m-2 veh-1) 150 50
Retention parameters
Parameter Road Brake Dust binder (g/m2)
gretention-thresh (mm) 0.06 0.5 250
gretention-min (mm) 0.02 0.3 50
INTER-TRACK AND SHARED SUB-MODEL PARAMETERS
Surface texture parameters
Adjusted parameter texture_scaling(i) Master texture scaling
gdrainable (mm) 1 1
f0,suspension(veh-1) 1
f0,spray (veh-1) 1
hdrainage-eff (dust) 1
hspraying-eff (dust) 1
Road track parameters
Track type Include which tracks Fraction road area Fraction vehicles Migration factor (1/veh)
falltrack 1 1 1 0.01
fouttrack 0 0.9 0.9 0.01
fintrack 0 0.1 0.08 0.01
fshoulder 0 0 0.01 0.01
fkerb 0 0 0.01 0.01
Track type Suspension rescaling Spray rescaling None None
falltrack 1 1 0 0
fouttrack 1 1 0 0
fintrack 100 100 0 0
fshoulder 0.1 1 0 0
fkerb 0.1 1 0 0