Appendix A

Complete List of Source-Term Module Input Parameter


The following tables list the computer code variable names for input parameters for the source-term module. They also show the relationship of those variables to the variables presented in the main body of the report. Note that there is not a direct one-to-one mapping of code variable names to variables presented in the report. For example, one computer code variable may represent one of a number of similar report equation variables, depending on which type of contamination scenario is being simulated. Furthermore, sometimes a computer code variable is input with a certain (more commonly available) set of units, and then the code converts the value to the set of units used in the report equations.
Table A.1. Site Constant Parameters
Name
Units
Description
Notation
SFDBULKD
g cm-3
Dry bulk density of surface soil
ßs
STAREA
cm2
Area ofthe waste site
A
STAVAILW
cm
Water-holding capacity of waste zone
wWHC
STAVTEMP
oC
Average air temperature at the waste site
T24
STAVWINDV
m s-1
Mean annual wind speed
STCFACTR
--
Vegetative cover factor
fv
STCLOUD
fraction
Fraction of sky with cloud cover
csky
STCORRSC
--
Non-erodible area correction factor
fne
STCRUST
fraction
Fraction of surface area covered with a crust layer
fcr
STDELTA_T 
yr
Length of time step
Dt
STELEV
m
Elevation of waste site
h1
STKFACTR
English Units(a)
Soil erodibility factor
Kfact
STLAT
degrees
Latitude of waste site
--
STLCDELEV
m
Elevation of Local Climatalogical Data (LCD) Station
h0
STLENGTH
cm
Length of site down erodible slope
Lslope
STLOCSUR
m
Surface roughness length
Lr
STMAXTIME
yr
Length of run
--
STMAXWIND
m s-1
Maximum wind speed at site
Umax
STMINWST
--
The minimum waste fraction for which analysis performed
--
STMNUMPRE
--
Number of monthly precipitation events
npj
STMOISTC
fraction
The volumetric moisture content fraction of the source zone
qw
STMPRECIP
cm
Monthly precipitation amount measured at LCD
dpruj
STNUMDIS
month-1
Frequency of mechanical disturbances to site
fd
STNUMPRCP
yr-1
Numberof days with 0.254mm precipitation
np
STOVLFLX
fraction
Overland flux for a ponded case as fraction of total water volume.
STPEI
--
Thornthwaite's Precipitation-Evaporation Index
fPE
STPFACTR
--
Erosion control practice factor
Pfact
STPRECIP
cm
2-yr, 6-hr, precipitation event
P2,6
STRHMAX
%
Maximum monthly relative humidity
STRHMIN
%
Minimum monthly relative humidity
STROADS
--
Flag to designate type of road travel
Control
STRTDIST
km
Distance traveled over contaminated surface
Lroad
STRTNUM
day-1
Average number of vehicles traveling over surface daily
nv
STSAND
%
Percent sand in surface soil
Psand
STSCSCN
--
SCS curveumber
nscs
STSILT
%
Percentof silt on road surface
Psilt
STSLOPE
%
Slope of waste site
Sslope
STSSOL
g cm-3
Concentration of suspended solids in surface impoundment
ßss
STSTORMI
--
Storm type index for location of waste site
--
STTEMP
oC
Temperature measured at LCD
T24
STTHICK 
cm
Thicknessof the waste zone
h, Lx, dp
STVEGFR
fraction
Fraction of surface area covered with vegetation
fv
STVSPEED
km hr-1
Mean vehicle speed at site
vveh
STVWEIGH
Mg
Mean vehicle weight
Mveh
STWHEELS
--
Mean number of wheels per vehicle
nw
STWINDHT
m
Height above ground of local wind measurements
hin
STWINDV
m s-1
Mean monthly wind speed at LCD
Ud2
WZDBULKD
g cm-3
Dry bulk density of waste zone
ßs




Table A.2. Site Series Parameters

Name
Units
Description
Notation
STAIRSPC
fraction
The volumetric air content fraction of the source zone
qa
STAIRSPC_TIM
yr
Times for air space-time pairs
t
STAIRSPC_NUM
--
This is the number of different airspace percentages
Counter
STCLEAN
cm
The initial thickness of the clean layer
zt
STCLEAN_TIM
yr
Times for cover thickness-time pairs
t
STCLEAN_NUM
--
This is the number of different clean layer thicknesses
Counter
STDARCY
cm yr-1
Darcy infiltration rate center>qw
STDARCY_TIM
yr
Times for infiltration-time pairs
t
STDARCY_NUM
--
This is the number of different infiltration rates
Counter
STTOTPOR
fraction
The total porosity fraction of the source zone
qt
STTOTPOR_TIME
yr
Times for porosity-time pairs
t
STTOTPOR_NUM
--
This is the number of different total porosity percentages
Counter
STWATR 
cm yr-1
Water erosion rate
E
STWATR_TIM
yr
Times for water erosion-time pairs
t
STWATR_NUM
--
This is the number of different water erosion rates
Counter
STWIND 
cm yr-1
Wind erosion rate
S
STWIND_TIM
yr
Times for wind erosion-time pairs
t
STWIND_NUM
--
This is the number of different wind erosion rates
Counter

 
 
 
Table A.3. Contaminant Constant Parameters

Name
Units
Description
Notation
CLDIFCO
cm2 yr-1
Grout Diffusion Coefficient for each contaminant
Dg
CLHLC
Henry's Law Constant for each contaminant
H
CLKOW
mL g-1
Octanol-water partitioning coefficient for each contaminant
Kow
CLKTYPE
--
Contaminant type for each contaminant
Database 
Param
CLLAMBDA
yr-1
Decay/degradation constant for each contaminant
 l
CLSPECACT
Ci g-1
Specific activity for each contaminant
Database 
Param
CLVAP
mm Hg
Vapor Pressure for each contaminant
CLWM
g mol-1
Molecular weight for each contaminant
Mm
FSCASID
--
CAS ID for each contaminant
Database 
Param
NDS
--
Number of daughter products for each contaminant
Database 
Param
NUMALLCON
--
Number of all contaminants (parents plus progeny)
nc
NUMCON
--
Number of contaminants (parents only)
nc
STINVEN
g
Inventory quantity for each contaminant
Mio
STORGCON 
g cm-3
Concentration of organic contaminants in the organic phase
Co
STSOL
g mL-1
Aqueous solubility for each contaminant
STVOLRAT
fraction
Volatilization ratio used for control of volatilization
--

 
 
 
Table A.4. Contaminant Series Parameters
Name
Units
Description
Notation
STKD
mL g-1
Kd for each contaminant
Kd
STKD_TIM
yr
Time for Kd-time series
t
STKD_NUM 
--
Number of different Kd values used
Counter

 
 
 
Table A.5. Waste Form Series Parameters
Name
Units
Description
Notation
STGLASS 
yr-1
Glass dissolution rate
rg
STGLASS_TIM
yr
Times for dissolution-time series
t
STGLASS_NUM 
--
This is the number of different glass dissolution rates
Counter
STSURFVOL 
cm-1
Surface to volume ratio of the grout monolith
Asg/Vg
STSURFVOL_TIM 
yr
Times for surface/volume-time series
t
STSURFVOL_NUM
--
This is the number of different monolith surface to volume ratios
Counter

 
 
 
Table A.6. Pathway Series Parameters
Name
Units
Description
Notation
STLEACH
g yr-1
Known leaching flux rates
STLEACH_TIM
yr
Times for flux-time leaching series
t
STLEACH_NUM
-- 
Number of known leach loss flux rates
Counter
STOVL
g yr-1
Known overland flux rates

STOVL_TIM
yr
Times for flux-time overland series
t
STOVL_NUM
-- 
Number of known overland flux rates
Counter
STSUSP
g yr-1
Known wind suspension flux rates
STSUSP_TIM 
yr
Times for flux-time suspension series
t
STSUSP_NUM
-- 
Number of known suspension flux rates
Counter
STVOLAT
g yr-1
Known volatilization flux rates
STVOLAT_TIM
yr
Times for flux-time volatilization series
t
STVOLAT_NUM 
-- 
Number of different volatilization rates
Counter
STSOURCE 
g yr-1
Known flux rates for a source to the waste zone
STSOURCE_TIM
yr
Times for flux-time source series
t
STSOURCE_NUM
-- 
Number of different flux rates for a source to the waste zone
Counter



(a) English ton acre-1 yr-1 per unit Rfact in English units