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D50 # D50 grain size per grain type
D90 # D90 grain size per grain type
Hrms # Hrms wave height for instat = 0,1,2,3
Tlong # Wave group period for case instat = 1
Tm01switch # Turn off or on Tm01 or Tm-10 switch
Topt # Absolute period to optimize coefficient
Trep # Representative wave period for instat = 0,1,2,3
alfa # Angle of x-axis from East
aquiferbot # Level of uniform aquifer bottom
aquiferbotfile # Name of the aquifer bottom file
avalanching # Include avalanching (1) or exclude (0)
back # Switch for boundary at bay side, 0 = radiating boundary (Ad), 1 = reflective boundary; uu=0
bcfile # Name of spectrum file
bchwiz # Use beachwizard, 0 = beachwizard off, 1 beachwizard on, bed update off, 2 beachwiz on, bed update on. (also requires morphology == 1)
bedfricfile # Bed friction file (only valid with values of C)
bedfriction # Bed friction formulation: 'chezy','white-colebrook'
compi # Imaginary unit
depfile # Name of the input bathymetry file
dir0 # Mean wave direction (Nautical convention) for instat = 0,1,2,3
disch_loc_file # Name of discharge locations file
disch_timeseries_file # Name of discharge timeseries file
drifterfile # Name of drifter data file
dt # Computational time step, in hydrodynamic time
dthetaS_XB # The (counter-clockwise) angle in the degrees needed to rotate from the x-axis in SWAN to the x-axis pointing East
dx # Regular grid spacing in x-direction
dy # Regular grid spacing in y-direction
dzg1 # Thickness of top sediment class layers
dzg2 # Nominal thickness of variable sediment class layer
dzg3 # Thickness of bottom sediment class layers
flow # Include flow calculation (1), or exclude (0)
freewave # Switch for free wave propagation 0 = use cg (default); 1 = use sqrt(gh) in instat = 3
front # Switch for seaward flow boundary: 0 = radiating boundary(Ad), 1 = Van Dongeren, 1997
g # Gravitational acceleration
globalvars # Mnems of global output variables, not per se the same sice as nglobalvar (invalid variables, defaults)
gridform # Swicth to read in grid bathy files with 'XBeach' or 'Delft3D' format respectively
gw0 # Level initial groundwater level
gw0file # Name of initial groundwater level file
gwReturb # Reynolds number for start of turbulent flow in case of gwscheme = turbulent
gwfastsolve # Reduce full 2D non-hydrostatic solution to quasi-explicit in longshore direction
gwflow # Turn on (1) or off (0) groundwater flow module
gwheadmodel # Model to use for vertical groundwater head: 'parabolic' (default), or 'exponential'
gwhorinfil # switch to include horizontal infiltration from surface water to groundwater (default = 0)
gwnonh # Switch to turn on or off non-hydrostatic pressure for groundwater
gwscheme # Scheme for momentum equation (laminar, turbulent)
hotstartflow # Switch to hotstart flow conditions with pressure gradient balanced by wind and bed stress
instat # Wave boundary condtion type
kmax # Number of sigma layers in Quasi-3D model; kmax = 1 (default) is without vertical structure of flow and suspensions
kx # Darcy-flow permeability coefficient in x-direction [m/s]
ky # Darcy-flow permeability coefficient in y-direction [m/s]
kz # Darcy-flow permeability coefficient in z-direction [m/s]
lat # Latitude at model location for computing Coriolis
left # Switch for lateral boundary at ny+1, 'neumann' = vv computed from NSWE, 'wall' = reflective wall; vv=0
leftwave # old name for lateralwave
lwave # Include short wave forcing on NLSW equations and boundary conditions (1), or exclude (0)
maxiter # Maximum number of iterations in wave stationary
meanvars # Mnems of mean output variables (by variables)
mmpi # Number of domains in m direction (cross-shore) when manually specifying mpi domains
morfac # Morphological acceleration factor
morfacopt # Option indicating whether times should be adjusted (1) or not(0) for morfac
morphology # Include morphology (1) or exclude (0)
morstart # Start time morphology, in morphological time
morstop # Stop time morphology, in morphological time
mpiboundary # Fix mpi boundaries along y-lines ('y'), x-lines ('x'), use manual defined domains ('man') or find shortest boundary ('auto')
ncfilename # xbeach netcdf output file name
ncross # Number of output cross sections
nd # Number of computational layers in the bed
nd_var # Index of layer with variable thickness
ndischarge # Number of discharge locations
ndrifter # Number of drifers
ne_layer # Name of file containing depth of hard structure
ngd # Number of sediment classes
nglobalvar # Number of global output variables (as specified by user)
nhbreaker # Turn on or off nonhydrostatic breaker model
nmeanvar # Number of mean,min,max,var output variables
nmpi # Number of domains in n direction (alongshore) when manually specifying mpi domains
nonh # Non-hydrostatic pressure option: 0 = NSWE, 1 = NSW + non-hydrostatic pressure compensation Stelling & Zijlema, 2003
nonhspectrum # Switch between spectrum format for wave action balance of nonhydrostatic waves
npoints # Number of output point locations
npointvar # Number of point output variables
nrugauge # Number of output runup gauge locations
nship # Number of ships
nspectrumloc # Number of input spectrum locations
nspr # nspr = 1 long wave direction forced into centres of short wave bins, nspr = 0 regular long wave spreadin
ntdischarge # Length of discharge time series
nveg # Number of vegetation species
nx # Number of computiation cell corners in x-direction
ny # Number of computiation cell corners in y-direction
oldhu # Turn on / off old hu calculation
oldnyq # Turn off or on old nyquist switch
outputformat # Choice of output file format: 'netcdf', 'fortran', or 'debug'
paulrevere # Specifies tide on sea and land ('land') or two sea points ('sea') if tideloc = 2
pointtypes # Point types (0 = point, 1=rugauge)
pointvars # Mnems of point output variables (by variables)
posdwn # Bathymetry is specified positive down (1) or positive up (-1)
projection # projection string
px # Pi
q3d # Turn on (1) or off (0) quasi-3D sediment transport module
random # Random seed on (1) or off (0) for instat = 4,5,6 boundary conditions
rho # Density of water
rhoa # Air density
rhog8 # 1/8*rho*g
rhos # Solid sediment density (no pores)
right # Switch for lateral boundary at right, 0 = vv computed from NSWE, 1 = reflective wall; vv=0
rightwave # old name for lateralwave
rotate # Rotate (1) postprocess output with the rotate function.
rt # Duration of wave spectrum at offshore boundary, in morphological time
sedtrans # Include sediment transport (1) or exclude (0)
shipfile # Name of ship data file
ships # Turn on (1) or off (0) ship waves
solver # Solver used to solve the linear system, sip, or tridiag (only for 1d)
solver_maxit # Maximum number of iterations in the linear sip solver
struct # Switch for hard structures
swave # Include short waves (1), exclude short waves (0)
swrunup # Turn on (1) or off (0) short wave runup
t # Computational time, in hydrodynamic time
taper # Spin-up time of wave boundary conditions, in morphological time
thetamax # Higher directional limit (angle w.r.t computational x-axis)
thetamin # Lower directional limit (angle w.r.t computational x-axis)
thetanaut # Thetamin,thetamax in cartesian (0) or nautical convention (1)
thetanum # Coefficient determining whether upwind (1) or central scheme (0.5) is used.
tideloc # Number of corner points on which a tide time series is specified
tidetype # Switch for offfshore boundary, velocity boundary or instant water level boundary (default)
timings # Switch to turn on (1) or off (0) progress output to screen
tintc # Interval time of cross section output
tintg # Interval time of global output
tintm # Interval time of mean,var,max,min output
tintp # Interval time of point and runup gauge output
tnext # Next time point for output or wave stationary calculation, in hydrodynamic time
tscross # Name of file containing timings of cross section output
tsglobal # Name of file containing timings of global output
tsmean # Name of file containing timings of mean, max, min and var output
tspoints # Name of file containing timings of point output
tstart # Start time of output, in morphological time
tstop # Stop time of simulation, in morphological time
tunits # Units can be defined in udunits format (seconds since 1970-01-01 00:00:00.00 +1:00)
vardx # Switch for variable grid spacing: 1 = irregular spacing, 0 = regular grid spacing
vegetation # Turn on (1) or off (0) interaction of waves and flow with vegetation
vegiefile # Name of vegie species list file
vegiemapfile # Name of vegie species map file
wbcversion # Version of wave boundary conditions
wearth # Angular velocity of earth calculated as: 1/rotation_time (in hours), later changed in calculation code to rad/s
windfile # Name of file with non-stationary wind data
windth # Nautical wind direction, in case of stationary wind
windv # Wind velocity, in case of stationary wind
xfile # Name of the file containing x-coordinates of the calculation grid
xori # X-coordinate of origin of axis
xyfile # Name of the file containing (Delft3D) xy-coordinates of the calculation grid
yfile # Name of the file containing y-coordinates of the calculation grid
yori # Y-coordinate of origin of axis
zs0 # Inital water level
zs0file # Name of tide boundary condition series
zsinitfile # Name of inital condition file zs
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ARC
Also added the following parameters to ignore list, because of zero-influence:
nrugdepth # Switch for active reflection# compensationof atdepths seawardto boundary:compute 0runup =in reflective, 1 = weakly (non) reflective
BRfacrunup gauge
breakviscfac # Factor to increase viscosity during breaking
maxerror # Calibration factor surface slope
C # Maximum wave height error in wave stationary iteration
facrun # Chezy coefficient
CFL # calibration coefficient for short wave runup
maxbrsteep # Maximum Courant-Friedrichs-Lewy number
Cd # Maximum wave steepness criterium
Tm01 # Wind drag coefficient
Tbfac # Old name for Trep
split # Calibration factor for bore interval Tbore: Tbore = Tbfac*Tbore
Tsmin # Split threshold for variable sediment layer (ratio to nominal thickness)
wavint # Minimum adaptation time scale in advection diffusion equation sediment
alpha # Interval between wave module calls (only in stationary wave mode)
depthscale # Wave dissipation coefficient in Roelvink formulation
bed # depthscale of (lab)test simulated. 1 = default, which corresponds to teh real world (nature)
breakvisclen # Calibration factor for bed transports [0..1]
beta # Ratio between local depth and length scale in extra breaking viscosity
dtheta # Breaker slope coefficient in roller model
betad # Directional resolution
nsetbathy # DissipationNumber parameterof longprescribed wavebed breaking turbulence
breakupdates
frac_dz # Relative #thickness Typeto ofsplit breakertime formulation (1=roelvink, 2=baldock, 3=roelvink adapted, 4=roelvink on/off breaking)
breakerdelaystep for bed updating
setbathy # Turn on (1) or Provide timeseries of prescribed bathy input, 0 = off (0default), breaker1 delay= model
breakviscfacon
oldwbc # Factor(1) toUse increaseold viscosityversion duringwave breaking
breakvisclenboundary conditions for instat 4,5,6
m # Ratio between local depth and length scale in extra breaking viscosity
bulk # Power in cos^m directional distribution for instat = 0,1,2,3
Cd # Option to compute bedload and suspended load seperately; 0 = seperately, 1 = bulk (as# inWind previousdrag versions)coefficient
cats merge # Current averaging time scaleMerge threshold for wci,variable insediment termslayer of(ratio meanto wavenominal periodsthickness)
cfARC # FrictionSwitch coefficientfor flow
cmaxactive reflection compensation at seaward boundary: 0 = reflective, 1 = weakly (non) reflective
facua # Maximum allowed sediment concentration
correctHm0 # Calibration factor time averaged flows due to wave skewness and asymmetry
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BRfac # Turn off or on Hm0 correction
delta # Calibration factor surface slope
C # Fraction of wave height to add to water depth
depthscale # Chezy coefficient
CFL # depthscale of (lab)test simulated. 1 = default, which corresponds to teh real world (nature)
dispc # Maximum Courant-Friedrichs-Lewy number
Tbfac # Coefficient in front of the vertical pressure gradient, Default = 1.
dryslp # Calibration factor for bore interval Tbore: Tbore = Tbfac*Tbore
Tsmin # Critical avalanching slope above water (dz/dx and dz/dy)
dtbc # Minimum adaptation time scale in advection diffusion equation sediment
alpha # Timestep used to describe time series of wave energy and long wave flux at# offshoreWave boundarydissipation (notcoefficient affectedin byRoelvink morfac)formulation
dthetabed # Directional resolution
dwetlayer # Calibration factor for bed transports [0..1]
beta # Thickness of the top soil layer interacting more freely with the surface# water
dzmaxBreaker slope coefficient in roller model
betad # Maximum bedlevel change due to# avalanching
epsDissipation parameter long wave breaking turbulence
break # Threshold water depth# aboveType whichof cellsbreaker are considered wet
eps_sd formulation (1=roelvink, 2=baldock, 3=roelvink adapted, 4=roelvink on/off breaking)
breakerdelay # ThresholdTurn velocityon difference(1) toor determineoff conservation(0) ofbreaker energy head vs momentum
epsidelay model
bulk # RatioOption ofto meancompute currentbedload toand timesuspended varyingload currentseperately; through0 offshore boundary
facAs = seperately, 1 = bulk (as in previous versions)
cats # Calibration factor time averaged flows due to# waveCurrent asymmetry
facDcaveraging time scale for wci, in terms of mean wave periods
cf # Option to control sediment diffusion coefficient [0..1]
facSk # Friction coefficient flow
cmax # Calibration factor time averaged flows due to wave skewness
facrun# Maximum allowed sediment concentration
correctHm0 # calibrationTurn coefficientoff foror shorton waveHm0 runupcorrection
facsddelta # fractionFraction of thewave localheight waveto lengthadd to use for shoaling delaywater depth
facsldispc # FactorCoefficient bedslopein effect
facuafront of the vertical pressure gradient, Default = 1.
dryslp # Calibration factor time# averagedCritical flowsavalanching dueslope toabove wave skewnesswater (dz/dx and asymmetry
fcutoffdz/dy)
dtbc # Low-freq cutoff frequency# forTimestep instatused = 4,5,6 boundary conditions
form to describe time series of wave energy and long wave flux at offshore boundary (not affected by morfac)
dwetlayer # Equilibrium sed. conc. formulation: 1 = Soulsby van Rijn,# 1997, 2 = Van Rijn 2008 with modifications by Van Thiel
frac_dzThickness of the top soil layer interacting more freely with the surface water
dzmax # Maximum Relativebedlevel change thicknessdue to splitavalanching
eps time step for bed updating
fw # Threshold water depth above which #cells Bedare frictionconsidered factor
fwcutoffwet
eps_sd # DepthThreshold greatervelocity thandifference whichto thedetermine bedconservation frictionof factorenergy ishead NOTvs appliedmomentum
gammaepsi # BreakerRatio parameterof inmean Baldockcurrent orto Roelvinktime formulation
gamma2varying current through offshore boundary
facAs # End of breaking parameter in# break = 4 formulation
gammaxCalibration factor time averaged flows due to wave asymmetry
facDc # MaximumOption ratioto wavecontrol heightsediment todiffusion water depth
hmin coefficient [0..1]
facSk # ThresholdCalibration waterfactor depthtime aboveaveraged whichflows Stokesdue driftto iswave includedskewness
hswitchfacsd # Water depth# atfraction whichof isthe switchedlocal fromwave wetslplength to dryslp
hwciuse for shoaling delay depth
facsl # Minimum depth until# whichFactor wave-current interaction is used
jetfac bedslope effect
fcutoff # OptionLow-freq tocutoff mimicfrequency turbulencefor productioninstat near revetments [0..1]
kdmin= 4,5,6 boundary conditions
form # Minimum value of kd ( pi/dx > minkd )
lws Equilibrium sed. conc. formulation: 1 = Soulsby van Rijn, 1997, 2 = Van Rijn 2008 with modifications by Van Thiel
fw # 1 = long wave stirring, 0 = no# longBed wavefriction stirringfactor
lwtfwcutoff # Depth greater than which the #bed Switchfriction 0/1factor longis waveNOT turbulenceapplied
mgamma # Breaker parameter in Baldock #or PowerRoelvink informulation
gamma2 cos^m directional distribution for instat = 0,1,2,3
maxbrsteep # End of breaking parameter #in Maximumbreak wave= steepness4 criteriumformulation
maxerrorgammax # Maximum ratio wave height errorto in wave stationary iteration
mergewater depth
hmin # MergeThreshold thresholdwater fordepth variableabove sedimentwhich layerStokes (ratiodrift to nominal thickness)
nis included
hswitch # Water depth at which is #switched Powerfrom inwetslp Roelvinkto dissipation modeldryslp
nchwci # SmoothingMinimum distancedepth (defineduntil aswhich nrwave-current ofinteraction cells) for estimating umean
nmaxis used
jetfac # Option to mimic #turbulence maximumproduction rationear of cg/c fro computing long wave boundary conditions
nrugdepthrevetments [0..1]
kdmin # Minimum Numbervalue of depthskd to( computepi/dx runup> inminkd runup gauge)
nsetbathylws # Number of prescribed bed updates
nuh # 1 = long wave stirring, 0 = no long wave stirring
lwt # Horizontal background viscosity
nuhfac # Switch 0/1 long wave turbulence
n # Viscosity switch for roller induced turbulent horizontal viscosity
nuhv # Power in Roelvink dissipation model
nc # Longshore viscosity enhancement factor, following Svendsen (?)
order # Smoothing distance (defined as nr of cells) for estimating umean
nmax # Switch for order of wave steering, 1 = first order wave steering (short wave energy only), 2# =maximum secondratio oderof wavecg/c steeringfro (boundcomputing long wave correspon\
ding to short wave forcing is added)
porboundary conditions
nuh # Horizontal background viscosity
nuhfac # Porosity
reformsteep # Viscosity Waveswitch steepnessfor criteriumroller toinduced reformturbulent afterhorizontal breakingviscosity
rfb nuhv # IfLongshore rfbviscosity =enhancement 1factor, thenfollowing maximum wave surface slope is feeded back in roller energy balance; else rfb = par%Beta
rollerSvendsen (?)
order # Switch for order of wave steering, 1 = first order wave #steering Turn(short onwave (1) or off(0) roller model
rugdepth energy only), 2 = second oder wave steering (bound long wave corresponding to short wave forcing is added)
por # Minimum depth for determination of last wet point in runup gauge
scheme # Porosity
reformsteep # Use first-order upwind (upwind_1), second order upwind (upwind_2) or Lax-Wendroff (lax_wendroff)
secbrsteep # Wave steepness criterium to reform after breaking
rfb # Secondary maximum wave steepness criterium
secorder # If rfb = 1 then maximum wave surface slope is feeded back in roller energy balance; else rfb = par%Beta
roller # Use second order corrections to advection/non-linear terms based on MacCormack scheme
sedcal # Turn on (1) or off(0) roller model
rugdepth # Sediment transport calibration coefficient per grain type
setbathy # Minimum depth for determination of last wet point in runup gauge
scheme # Provide timeseries of prescribed bathy input, 0 = off (default), 1 = on
setbathyfile # Use first-order upwind (upwind_1), second order upwind # Name of prescribed bed update file
shoaldelay(upwind_2) or Lax-Wendroff (lax_wendroff)
secbrsteep # TurnSecondary onmaximum (1)wave orsteepness off (0) shoaling delay
sigfaccriterium
secorder # Use second order corrections # dsig scales with log(sigfac). Default = 1.3
smag to advection/non-linear terms based on MacCormack scheme
sedcal # SwitchSediment fortransport smagorinskycalibration subgridcoefficient modelper forgrain viscocity
smax type
setbathyfile # BeingName tested:of maximumprescribed Shieldsbed parameter for ceq Diane Foster
snellsupdate file
shoaldelay # Turn on (1) or off (0) Snell's law for wave refraction
solver_accshoaling delay
sigfac # dsig accuracyscales with respect to the right-hand side used
solver_urelaxlog(sigfac). Default = 1.3
smag # Underrelaxation parameter
sourcesink # Switch for smagorinsky subgrid model for viscocity
smax # In suspended transport use source-sink terms to calculate bed level change (1) or sus transport gradients (0)
split # Being tested: maximum Shields parameter for ceq Diane Foster
snells # Split threshold for variable sediment layer (ratio to nominal thickness)
sprdthr # Turn on (1) or off (0) Snell's law for wave refraction
solver_acc # Threshold ratio to maxval of S above which spec# densaccuracy arewith readrespect into (default 0.08*maxval)
sus the right-hand side used
solver_urelax # Underrelaxation parameter
sourcesink # Calibration factor for suspensions transports [0..1]
sws # In suspended transport use source-sink terms to calculate bed level change (1) or sus transport gradients (0)
sprdthr # 1 = short wave & roller stirring and undertow, 0 = no short wave & roller stirring and undertow
trepfac # Threshold ratio to maxval of S above which spec dens are read in # Compute mean wave period over energy band: par%trepfac*maxval(Sf) for instat 4,5,6; converges to Tm01 for trepfac = 0.0 and
tsfac(default 0.08*maxval)
sus # Calibration factor for suspensions transports [0..1]
sws # Coefficient determining Ts = tsfac * h/ws in sediment source term
turb # 1 = short wave & roller stirring and undertow, 0 = no #short Switchwave to& includeroller shortstirring waveand turbulence:undertow
turbadvtrepfac # SwitchCompute 0/1mean towave activateperiod over turbulenceenergy advection modelband: par%trepfac*maxval(Sf) for short and or long wave turbulence
ucrcal instat 4,5,6; converges to Tm01 for trepfac = 0.0 and
tsfac # Critical velocity calibration coefficient per# grainCoefficient type
umindetermining Ts = tsfac * h/ws in sediment source term
turb # Threshold velocity for upwind velocity detection and for vmag2# inSwitch eq.to sedimentinclude concentration
waveformshort wave turbulence:
turbadv # Option for waveshape# model:Switch 0/1 =to Ruessinkactivate &turbulence Vanadvection Rijn,model 2for =short Vanand Thielor delong Vries,wave 2009turbulence
wavintucrcal # IntervalCritical betweenvelocity wavecalibration modulecoefficient callsper (only in stationary wave mode)
wcigrain type
umin # Threshold velocity for upwind #velocity Turnsdetection onand (1)for orvmag2 off (0) wave-current interaction
wetslpin eq. sediment concentration
waveform # Option #for Criticalwaveshape avalanchingmodel: slope1 under= water (dz/dx and dz/dy)
z0 Ruessink & Van Rijn, 2 = Van Thiel de Vries, 2009
wci # Zero flow velocity level in Soulsby# vanTurns Rijnon (19971) sed.conc. expression
or off (0) wave-current interaction
wetslp # Critical avalanching slope under water (dz/dx and dz/dy)
z0 # Zero flow velocity level in Soulsby van Rijn (1997) sed.conc. expression
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Marginal sensitivity analysis
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facsdfwcutoff # fraction of the local wave length to# useDepth forgreater shoalingthan delaywhich depth
hwcithe bed friction factor is NOT applied
hwci # Minimum depth until which wave-current interaction is used
scheme # Minimum depth until which wave-current interaction #is Use first-order upwind (upwind_1), second order upwind (upwind_2) or Lax-Wendroff (lax_wendroff)
jetfacused
jetfac # Option to mimic turbulence production near revetments [0..1]
nrugdepthdtbc # Number of depths to compute runup in runup gauge
smag # Timestep used to describe time series of wave energy and long #wave Switchflux forat smagorinskyoffshore subgridboundary model(not for viscocity
breakviscfac affected by morfac)
sigfac # Factor to increase viscosity during breaking
sigfac # dsig scales with log(sigfac). Default = 1.3
gamma2 # End of breaking parameter in break = 4 formulation
maxerrorlwt # Maximum wave height error in wave stationary iteration
form # Switch 0/1 long wave turbulence
waveform # Equilibrium sed. conc. formulation: 1 = Soulsby van Rijn, 1997, 2 = Van Rijn 2008 with modifications by# VanOption Thiel
lwsfor waveshape model: 1 = Ruessink & Van Rijn, 2 = Van Thiel de Vries, 2009
facsd # 1 = long wave stirring, 0 = no long wave stirring
turb # fraction of the local #wave Switchlength to use includefor shortshoaling wavedelay turbulence:depth
facrunz0 # calibration coefficient for short wave runup
sourcesink # Zero flow #velocity Inlevel suspendedin transportSoulsby usevan source-sink terms to calculate bed level change (1) or sus transport gradients (0)
lwtRijn (1997) sed.conc. expression
betad # SwitchDissipation 0/1parameter long wave breaking turbulence
rollercorrectHm0 # Turn onoff (1) or off(0) roller model
waveformon Hm0 correction
BRfac # Option for waveshape model: 1 = Ruessink & Van Rijn, 2 = Van# ThielCalibration defactor Vries,surface 2009
turbadv slope
bed # Switch 0/1 to activate turbulence advection model for short and or long wave turbulence
sus # Calibration factor for suspensionsbed transports [0..1]
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fwcutoff # Maximum wave steepness criterium
sws # ? relevant for all
hwci # 1 = short wave & roller stirring and undertow, 0 = no short wave & roller stirring and undertow
Tm01 # only relevant for wci=1, default is wci=0
jetfac # Old name for Trep
split # only relevant # Split threshold for variable sediment layer (ratio to nominal thickness)
wavintfor swrunup=1, default is swrunup=0
dtbc # Interval between wave module calls (only# in? stationaryrelevant wavefor mode)
rfball
sigfac # If rfb = 1# thenonly maximumrelevant wavefor surfacekmax>1, slopedefault is feeded back in roller energy balance; else rfb = par%Beta
snellskmax=1
gamma2 # ? Turnrelevant on (1)for break=roelvink1 or off (0) Snell's law for wave refraction
wcibreak=roelvink2, default is break=roelvink2
lwt # Turns on (1) or off (0) wave-current interaction
bulk # ? relevant for turbulence computation, which is the default
waveform # Option to compute bedload and suspended load seperately; 0 = seperately, 1 = bulk (as in previous versions)
depthscale # only possible when turb!=bore_averaged, default is turb=bore_averaged
facsd # depthscale of (lab)test simulated. 1 = default, which corresponds to teh real world (nature)
breakvisclen # Ratioonly betweenrelevant local depth and length scale in extra breaking viscosity
dthetafor shoaldelay=1, default is shoaldelay=0
z0 # Directional resolution
dtbc # only relevant for form=soulsby_vanrijn, default is form=vanthiel_vanrijn
betad # Timestep used to describe time series of wave energy and long wave flux at offshore boundary (not affected by morfac)
z0 # only relevant for lwt=1, default is lwt=0
correctHm0 # Zero flow velocity level in Soulsby van Rijn (1997) sed.conc. expression
nsetbathy # ? relevant for all
BRfac # Number of prescribed bed updates
frac_dz # Relativeonly thicknessrelevant to split time step for bed updating
breakfor rfb=1, default is rfb=0
bed # Type of breaker formulation (1=roelvink, 2=baldock, 3=roelvink adapted, 4=roelvink on/off breaking)
betad # only relevant for bulk=0, default is bulk=1
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Proposed short list
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gamma # Dissipation parameter long wave breaking turbulence
setbathy # Breaker #parameter Providein timeseriesBaldock ofor prescribedRoelvink bathy input, 0 = off (default), 1 = on
correctHm0 # Turn off or on Hm0 correction
oldwbcformulation
facAs # Calibration factor time averaged flows due to wave asymmetry
fw # (1) Use old version wave boundary conditions for instat 4,5,6
BRfac # Bed friction factor
beta # Calibration factor surface slope
m # Breaker slope coefficient in roller #model
alpha Power in cos^m directional distribution for instat = 0,1,2,3
bed # CalibrationWave factordissipation forcoefficient bedin transports [0..1]
Cd # Wind drag coefficient
fwcutoffRoelvink formulation
wetslp # Critical avalanching slope under water (dz/dx and dz/dy)
facSk # Depth greater than which the bed friction factor is NOT applied
merge # Calibration factor time averaged flows due to wave skewness
gammax # Merge threshold for variable sediment layer (ratio to nominal thickness)
fcutoff # Low-freqMaximum cutoffratio frequencywave forheight instatto = 4,5,6 boundary conditions
ARCwater depth
cf # Switch for active reflection compensation at seaward boundary: 0 = reflective,# 1Friction = weakly (non) reflective
shoaldelay # Turn on (1) or off (0) shoaling delay
breakerdelay # Turn on (1) or off (0) breaker delay model
coefficient flow
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Expert Expert panel
- Dano Roelvink
- Ad Reniers
- Jaap van Thiel de Vries
- Robert McCall
- Ap van Dongeren
Short list
Variation matrix
Resolution vs. dimensions
We can choose either to vary a large number of parameters (dimensions) using a limited resolution or vary a small number of parameters using a high resolution.
Cases
- Deltaflume ?
- Deltaflume 2006
- Boers ?
- 1953 storm surge
Result
Discussion
Several topics within this workflow are still being discussed. These discussions are briefly mentioned below.
Performance indicators
XBeach allows a variety of performance indicators to be used to compare the performance of one set of settings against another. For example, a profile comparison with measured data may be used by computing a BSS score. The BSS score itself, however, is subject to discussion for this purpose. Moreover, comparison data is often obtained from flume experiments on scale. These experiments use scaling rules that are derived by comparing erosion profiles rather than profile shape. The profile shape for these tests can thus not be used. For now, we use the erosion volume above SSL as performance indicator. Another advantage of this indicator is that it relates well to other calibration studies for dune assessment models in the Netherlands.
Scaling
...
- Gerben Ruessink
- Kees den Heijer
- Arnold van Rooijen
- Joost den Bieman
- ...
Invitation
—
Dear XBeach expert,
Deltares is reconsidering the default settings of XBeach for the use of XBeach as advanced assessment model for the Dutch coast. As scientific developer or advanced XBeach user we would like your opinion on this subject.
XBeach provides about 250 parameters to be set by the user. Many of those are related to case-specific input or are related to processes and functionalities that are not relevant for the application as assessment model for the Dutch coast. Discarding all these parameters, still a long list of over 80 parameters will be available to the user.
An assessment model is supposed to be suitable for application by ordinary users. Therefore we would like to minimise the fraction of these 80+ parameters exposed to these users, preferably by a 100% so that only case-specific data is to be provided by the user. In order to do so, we need to offer a default set of parameter settings that are applicable for dune assessment computations along the Dutch coast. We intend to derive such default set of parameters by systematically varying the parameter settings for a selected set of validation cases that are representative for the Dutch coast. Ultimately we will pick the set of parameters that resembles the validation measurements best.
Systematic variation of a set of 80+ parameters is, however, unfeasible. Only if we would pick 2 values per parameter and a single validation case it would take a zillion years to run the necessary computations. Therefore the first step is to eliminate the long list of 80+ parameters to a short list of less than 10 parameters based on expert judgement. This is where your help is appreciated.
Attached to this e-mail you will find a list of the 80+ relevant XBeach parameters. We would like you to assign 25 points to the parameters that should, according to you, be considered in the systematic variation. Optionally, you may indicate a value range for each parameter. We will divide about 10.000 XBeach simulations over the parameters that received the most points. The number of parameters is not set beforehand. We will consider including more parameters (dimensions) over including more variations per parameter (resolution). Parameters that are not included will be set to their current default value.
As a guidance, we also attached two plots that provide some insight in the (marginal) sensitivity of XBeach for the 80+ parameters found in the list. The marginal sensitivity is determined by running a 1D XBeach simulation using a schematised profile representative for the Dutch coast and normative storm conditions representative for the location Hoek van Holland. During each simulation only a single parameter is varied within it's applicable range. Some parameters depend on others (hwci, jetfac, waveform, facsd, z0, betad, BRfac, bed). In these cases both parameters are set, but only the parameter of interest is varied within it's range.
The first plot shows the sensitivity of the erosion volume above SSL for each parameter over it's valid range of values. The black dot depicts the default value. The red line is a linear fit excluding outliers. The second plot shows the range of erosion volumes found when varying each parameter, again excluding outliers. The second plot is ordered based on the variation of erosion volumes found. Outliers are excluded since they often correspond to valid, but unrealistic values (e.g. dzmax=0).
Please use these plots as guidance only. The plots are generated using a single model set-up only and not representative for all cases that should be taken into consideration. Also some parameters with large influence are not good candidates for systematic variation. For example, the parameter "sus" has a large influence, but it is probably not a good idea to calibrate XBeach turning suspended sediment transport on or off. On the other hand, it might not be so useful to include a parameter to the short list that has no influence at all.
A few remarks on the continuation of this calibration effort might be important to your input:
- We only consider 1D cases (transects)
- We only consider erosion volumes above SSL as performance indicator (we will look at profiles separately, later on)
- We will scale the validation cases to prototype scale and run XBeach at that scale (we will look into scaling issues separately, later on)
- We do not include the depthscale parameter in this study (it is always 1), but we will include the parameters set by the depthscale parameter (we will look into scaling issues seperately, later on)
- We exclude the following processes / functionalities from calibration beforehand:
- vegetation
- wind
- ships
- non-hydrostatic
- drifters
- mpi
- morfac
- discharge
- groundwater flow
- beach wizard
- sediment fractions
- stationary wave solver
Your input is highly appreciated. You can provide your point assignments by a reply to this e-mail. Any list in any regular file format will do.
If you do not wish to participate, or if you will not be able to provide your input before May, 15th 2014, please let is know.
Best regards,
Bas Hoonhout
Pieter van Geer
http://publicwiki.deltares.nl/display/XBEACH/Default+settings
—
Short list
Variation matrix
Resolution vs. dimensions
We can choose either to vary a large number of parameters (dimensions) using a limited resolution or vary a small number of parameters using a high resolution.
Cases
- Deltaflume ?
- Deltaflume 2006
- Boers ?
- 1953 storm surge
Result
Discussion
Several topics within this workflow are still being discussed. These discussions are briefly mentioned below.
Performance indicators
XBeach allows a variety of performance indicators to be used to compare the performance of one set of settings against another. For example, a profile comparison with measured data may be used by computing a BSS score. The BSS score itself, however, is subject to discussion for this purpose. Moreover, comparison data is often obtained from flume experiments on scale. These experiments use scaling rules that are derived by comparing erosion profiles rather than profile shape. The profile shape for these tests can thus not be used. For now, we use the erosion volume above SSL as performance indicator. Another advantage of this indicator is that it relates well to other calibration studies for dune assessment models in the Netherlands.
Scaling
Comparison with data is often done using data obtained from flume experiments. These experiments are performed on scale. XBeach allows us to simulate the experiment at the scale of the experiment rather than on a 1:1 scale. As for now, this is not done for two reasons. First, the scaling within XBeach is still subject to discussion. Second, other calibration studies for dune assessment models also first scaled the experiment results and then performed the calibration.
Depthscale
The depthscale parameter is subject to discussion and should preferably be omitted. It is therefore not part of the long list. A separate study will investigate the scaling performance in XBeach.
Processes / functionalities
What processes / functionalities do we include? Probably not the following:
- vegetation
- wind
- ships
- non-hydrostatic
- drifters
- mpi
- morfac
- discharge
- groundwater flow
- beach wizard
- sediment fractions
- stationary wave solver
But what about:
- structures
- short-wave runup
- shoaling delay
- breaker delay
- wave-current interaction
- long-wave stirring
- long-wave turbulence
Python toolbox
In order to efficiently perform the workflow described above, some Python tools have been developed. The toolbox is available through the OpenEarthTools repository: https://svn.oss.deltares.nl/repos/openearthtools/trunk/python/applications/xbeach/default_settings. A IPython notebook is available at the same location that illustrates the simple workings of the toolbox.
The main functions are as follows:
| Code Block |
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import default_settings
# read and write an overview of available XBeach parameters
default_settings.filesys.write_overview('all_params.txt')
ignore_params = default_settings.filesys.read_overview('ignore_params.txt')
# include dependencies and exclude parameters read from ignore list
dependencies = {'hwci' : {'wci' : 1},
'jetfac' : {'swrunup' : 1},
'waveform' : {'turb' : 'wave_averaged'},
'facsd' : {'shoaldelay' : 1},
'z0' : {'form' : 'soulsby_vanrijn'},
'betad' : {'lwt' : 1},
'BRfac' : {'rfb' : 1},
'bed' : {'bulk' : 0}}
params = default_settings.xbeach.get_parameters(dependencies=dependencies)
params_longlist = {k:v for k,v in params.iteritems() if k not in params_ignored}
# write models for marginal sensitivity analysis
default_settings.filesys.write_models(params_longlist, overwrite=False)
# run models for marginal sensitivity analysis
default_settings.filesys.run_models(overwrite=False)
# monitor model progress
default_settings.filesys.stat_models()
# read erosion volumes above SSL
V = default_settings.filesys.read_volumes()
# plot sensitivity
fig, axs = default_settings.plot.plot_volumes(V, params=params)
fig, axs = default_settings.plot.plot_sensitivity(V, params=params)
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