Fort.15 file format
The basic file structure of the fort.15 file is shown below. Each line of input data is represented by a line containing the input variable name(s). Inputs in the fort.15 file must be entered in the exact order shown on this page. Blank lines and headings are only to enhance readability. Loops indicate multiple lines of input.
Main Controls
Metadata and Logging
Parameter  Type  Required?  Description  Values 

RUNDES

32 character string  Always  Run description  Any alphanumeric 
RUNID

24 character string  Always  Run identification  Any alphanumeric 
NFOVER

integer  Always  Nonfatal error override option  0 or 1 
NABOUT

integer  Always  Logging level  1, 0, 1, 2, or 3 
NSCREEN

integer  Always  Logging output destination  1, 0, or 1 
Numerics & Physics
IHOT
 whether to read a hotstart file
ICS
 coordinate projection to run in
IM
 model run mode
IDEN
 density forcing mode, include this line only if: IM = 20, 21, 30, 31
, or if IM
's last 6digit entry is > 4 (e.g., 513115
).
NOLIBF
 bottom stress parameterization mode
NOLIFA
 finite amplitude term mode
NOLICA
 advection term mode
NOLICAT
 advection term mode
NWP
 number of nodal attributes
for j=1 to NWP
AttrName(j)
 nodal attributes to use, include this line only if:NWP > 0
end j loop
NCOR
 Coriolis control
NTIP
 tidal potential forcing control
NWS
 meteorological, wave, and ice forcing control
NRAMP
 forcing ramping control
G
 acceleration due to gravity
TAU0
 affects numerical diffusion/stability of governing equations
Tau0FullDomainMin Tau0FullDomainMax
 limits on TAU0
, include this line only if:TAU0 = 5.0
.
DTDP
 model time step (seconds) and predictorcorrector control
STATIM
 shifts numeric value of starting simulation time (days)
REFTIM
 shifts reference time for tidal harmonic analysis
Meteorological controls including WTIMINC, RSTIMINC
 include this line: for most cases of NWS ≠ 0
, see linked page for details.
RNDAY
 end time of simulation (days)
Ramping controls including DRAMP, FluxSettlingTime
 include this line only if: NRAMP > 0
, see linked page for details
A00 B00 C00
 time weighting factors in GWCE
H0
 minimum depth, include this line only if: NOLIFA = 0
or 1
H0
INTEGER
INTEGER
VELMIN
 alternate minimum depth controls, include this line only if: NOLIFA = 2
or 3
SLAM0 SFEA0
 longitude and latitude for center of CPP coordinate projection
TAU
 linear bottom friction coefficient, include this line only if: NOLIBF = 0
CF
 quadratic bottom friction coefficient or limit, include this line only if: NOLIBF = 1
CF
HBREAK
FTHETA
FGAMMA
 alternate quadratic bottom friction controls, include this line only if: NOLIBF = 2
ESLM
 horizontal eddy viscosity controls, include this line only if: IM = 0
, 1
, or 2
ESLM
ESLC
 alternate horizontal eddy viscosity controls, include this line only if: IM = 10
CORI
 constant Coriolis coefficient, only used if NCOR=0
Periodic (Tidal) Body Forcing
end k loop
Periodic (Tidal) Boundary Elevations
end k loop
for k=1 to NBFR
end k loop
Periodic (Tidal) Boundary Velocities
ANGINN
NFFR  include this line only if IBTYPE = 2, 12, 22, 32 or 52 in the Grid and Boundary Information File
for k=1 to NFFR
end k loop
for k=1 to NFFR
 ALPHA(k)
 for j=1 to NVEL
 QNAM(k,j), QNPH(k,j)  use this line if IBTYPE = 2, 12, 22 in the Grid and Boundary Information File
 QNAM(k,j), QNPH(k,j), ENAM(k,j), ENPH(k,j)  use this line if IBTYPE = 32 in the Grid and Boundary Information File
 QNAM(k,j), QNPH(k,j)  use this line if IBTYPE = 2, 12, 22 in the Grid and Boundary Information File
 end j loop
end k loop
Model Output
NOUTE, TOUTSE, TOUTFE, NSPOOLE
NSTAE
for k=1 to NSTAE
 XEL(k), YEL(k)  use these lines if NSTAE is positive. If negative, stations are listed in the elev_stat.151 file
end k loop
NOUTV, TOUTSV, TOUTFV, NSPOOLV
NSTAV
for k=1 to NSTAV
 XEV(k), YEV(k)  use these lines if NSTAV is positive. If negative, stations are listed in the vel_stat.151 file
end k loop
NOUTC, TOUTSC, TOUTFC, NSPOOLC  include this line only if IM =10
NSTAC  include this line only if IM =10
for k=1 to NSTAC
end k loop
NOUTM, TOUTSM, TOUTFM, NSPOOLM  include this line only if NWS is not equal to zero.
NSTAM  include this line only if NWS is not equal to zero.
for k=1 to NSTAM
 XEM(k), YEM(k)  use these lines if NSTAM is positive. If negative, stations are listed in the met_stat.151 file
end k loop
NOUTGE, TOUTSGE, TOUTFGE, NSPOOLGE
NOUTGV, TOUTSGV, TOUTFGV, NSPOOLGV
NOUTGC, TOUTSGC, TOUTFGC, NSPOOLGC  include this line only if IM =10
NOUTGW, TOUTSGW, TOUTFGW, NSPOOLGW  include this line only if NWS is not equal to zero.
Harmonic Analysis
end k loop
THAS, THAF, NHAINC, FMV
NHASE, NHASV, NHAGE, NHAGV
Hotstart Output and Numeric Controls
NHSTAR, NHSINC
ITITER, ISLDIA, CONVCR, ITMAX
For a 2DDI ADCIRC run that does not use netCDF nor namelists, the file ends here. For those controls, see further below in the NetCDF Controls and Namelists sections.
3D Model Run
IDEN
ISLIP, KP
Z0S,Z0B
ALP1,ALP2,ALP3
IGC, NFEN
for k=1 to NFEN (include this loop only if IGC = 0, k=1 at bottom, k= NFEN at surface)
end k loop
IEVC, EVMIN, EVCON
for k=1 to NFEN (include this loop only if IEVC = 0, k=1 at bottom, k= NFEN at surface)
end k loop
THETA1, THETA2(include this line only if IEVC = 50 or 51)
I3DSD,TO3DSDS,TO3DSDF,NSPO3DSD
NSTA3DD
for k=1 to NSTA3DD
end k loop
I3DSV,TO3DSVS,TO3DSVF,NSPO3DSV
NSTA3DV
for k=1 to NSTA3DV
end k loop
I3DST,TO3DSTS,TO3DSTF,NSPO3DST
NSTA3DT
for k=1 to NSTA3DT
end k loop
I3DGD,TO3DGDS,TO3DGDF,NSPO3DGD
I3DGV,TO3DGVS,TO3DGVF,NSPO3DGV
I3DGT,TO3DGTS,TO3DGTF,NSPO3DGT
The following line will be read in if IM is 21 or 31.
RES_BC_FLAG, BCFLAG_LNM, BCFLAG_TEMP
The following two lines will be read in if RES_BC_FLAG is negative.
RBCTIMEINC
BCSTATIM
The following two lines will be read in if RES_BC_FLAG = 2.
RBCTIMEINC, SBCTIMEINC
BCSTATIM, SBCSTATIM
The following two lines will be read in if RES_BC_FLAG = 3.
RBCTIMEINC, TBCTIMEINC
BCSTATIM, TBCSTATIM
The following two lines will be read in if RES_BC_FLAG = 4.
RBCTIMEINC, SBCTIMEINC, TBCTIMEINC
BCSTATIM, SBCSTATIM, TBCSTATIM
The following two lines will be read in if RES_BC_FLAG = 3 or 4 and BCFLAG_TEMP is not equal to 0.
TTBCTIMEINC, TTBCSTATIM
TTBCTIMEINC
The following two lines will be read in only if IM is 21 or 31.
SPONGEDIST
EQNSTATE
The following lines will be read in only if IDEN is > 0.
NLSD, NVSD
NLTD, NVTD
ALP4
The following line will be read in only if IDEN = 3 or 4.
NTF
NetCDF Controls
The following lines will be read in only if the NetCDF output or hotstart format is chosen
NCPROJ
NCINST
NCSOUR
NCHIST
NCREF
NCCOM
NCHOST
NCCONV
NCCONT
NCDATE
Namelists
The following Fortran namelist lines are optional, but if they appear, they must appear at the very end of the fort.15 file.
&metControl WindDragLimit=floatValue, DragLawString='stringValue', rhoAir=floatValue, outputWindDrag=logicalValue /
&timeBathyControl NDDT=integerValue, BTIMINC=floatValue, BCHGTIMINC=floatValue /
&waveCoupling WindWaveMultiplier=floatValue /
&SWANOutputControl SWAN_OutputHS=logicalValue, SWAN_OutputDIR=logicalValue, SWAN_OutputTM01=logicalValue, SWAN_OutputTPS=logicalValue, SWAN_OutputWIND=logicalValue, SWAN_OutputTM02=logicalValue, SWAN_OutputTMM10=logicalValue /
&subdomainModeling subdomainOn=logicalValue/
&wetDryControl outputNodeCode=logicalValue, outputNOFF=logicalValue, noffActive=logicalValue /
&inundationOutputControl inundationOutput=logicalValue0, inunThresh =floatValue /
&TVWControl use_TVW=logicalValue, TVW_file='stringValue', nout_TVW =integerValue, touts_TVW =floatValue, toutf_TVW=floatValue, nspool_TVW =integerValue /
&WarnElevControl WarnElev=floatValue, ErrorElev=floatValue, WarnElevDump=logicalValue, WarnElevDumpLimit=integerValue /
&dynamicWaterLevelCorrectionControl dynamicWaterLevelCorrectionFileName='stringValue' dynamicWaterLevelCorrectionMultiplier=floatValue, dynamicWaterLevelCorrectionRampStart=floatValue, dynamicWaterLevelCorrectionRampEnd=floatValue, dynamicWaterLevelCorrectionRampReferenceTime='stringValue', dynamicWaterLevelCorrectionSkipSnaps=integerValue /