source: Roms_tools/Run/sediment.in @ 1

1  Stitle (a80)
ROMS - Sediment - Test

2  Sd(1-NST), CSED, SRHO,  WSED,  ERATE,  TAU_CE, TAU_CD, BED_FRAC(1:NLAY)
      0.125   9.9   2650.  9.4    25.0e-5  0.05    0.14    0.4  0.4
      0.050   0.0   2650.  1.6     4.0e-5  0.01    0.14    0.6  0.6

3 BTHK(1:NLAY)
       0.3E-2   10. 
            
4 BPOR(1:NLAY)
       0.41    0.42

5 Hrip             
       0.03  

6 Lrip
       0.14  

99 END of sediment input data

!
!=====================================================================
!  Copyright (c) 2004 UCLA/Rutgers
!==================================== Meinte Blaas | Hernan G. Arango =
!
   GLOSSARY
   ========

*** CARD 1: String with a maximum of eighty characters.

  Stitle    Sediment case title.


*** CARD 2: Sediment grain parameters & initial values (NST lines).

  Sd        Diameter of grain size class [mm].

  CSED      Initial concentration (spatially uniform) [mg/l].  
  
  SRHO      Density of sediment material of size class [kg/m3]. 
            Quartz: SRHO=2650 kg/m3  
  
  WSED      Settling velocity of size class [mm/s].   
            Typically WSED  = 1E3*  {visk*(sqrt(10.36^2+1.049*D^3)-10.36)/d50} [mm/s] (Soulsby 97)
            with  D=d50*(g*(srho/rhow-1)/(visk^2))^0.33333
                  rhow=1000 kg/m3; d50=Sd*1.e-3 m; 
                  visk=1.3e-3/rhow m2/s; g=9.8 m/s2  
            
  ERATE     Erosion rate of size class [kg/m2/s].  
            Typically ERATE  =gam0*WSED*1.e-3*SRHO [kg/m2s];
            with gam0=1E-3 - 1E-5 (Smith & McLean, Drake&al)
             
  TAU_CE    Critical shear stress for sediment motion [N/m2]
            (initiation of bedload for coarses, suspension for fines). 
            Typically TAU_CE =tau_cb=thetcr.*(g*(srho-rhow).*d50) [N/m2]; (Shields, bedload)
            with thetcr = 0.3./(1+1.2*D) + 0.055*(1-exp(-0.02*D)) (Soulsby & Whitehouse 97) 
            TAU_CE   = rhow*(0.8 WSED*1E-3)^2 [N/m2] (suspended load)
            
  TAU_CD    Critical shear stress for depostion of cohesive sediments [N/m2]
  
  BED_FRAC  Volume fraction of each size class in each bed layer (NLAY columns) [0<BED_FRAC<1] 


*** CARD 3: Sediment bed thickness, 1st field is top layer ('delt_a')

  BTHK      Initial thicknesses of bed layers [m]
            Bthk(1) active layer thickness, fixed in simulation unless SUM(Bthk(:))<Bthk(1)
  
*** CARD 4: Sediment bed porosity

   BPOR     Initial porosity of bed layers [m]
            used in ana_sediment ifdef ANA_SEDIMENT || not in init.nc*
  
*** CARD 5: Bottom ripple height         

   Hrip     Initial ripple height [m]
            used in ana_sediment ifdef ANA_SEDIMENT || not in init.nc*

*** CARD 6: Bottom ripple length

   Lrip     Initial ripple length [m]
            used in ana_sediment ifdef ANA_SEDIMENT || not in init.nc*