| 1 | #include "cppdefs.h" | 
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| 2 |  | 
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| 3 | MODULE sed_bed_mod | 
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| 4 |  | 
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| 5 | #if defined NONLINEAR && defined SEDIMENT && !defined COHESIVE_BED | 
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| 6 | ! | 
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| 7 | !svn $Id: sed_bed.F 233 2008-09-18 02:05:28Z arango $ | 
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| 8 | !==================================================== John C. Warner === | 
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| 9 | !  Copyright (c) 2002-2008 The ROMS/TOMS Group      Hernan G. Arango   ! | 
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| 10 | !    Licensed under a MIT/X style license                              ! | 
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| 11 | !    See License_ROMS.txt                                              ! | 
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| 12 | !======================================================================= | 
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| 13 | !                                                                      ! | 
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| 14 | !  This routine computes sediment bed layer stratigraphy.              ! | 
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| 15 | !                                                                      ! | 
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| 16 | !  Warner, J.C., C.R. Sherwood, R.P. Signell, C.K. Harris, and H.G.    ! | 
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| 17 | !    Arango, 2008:  Development of a three-dimensional,  regional,     ! | 
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| 18 | !    coupled wave, current, and sediment-transport model, Computers    ! | 
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| 19 | !    & Geosciences, 34, 1284-1306.                                     ! | 
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| 20 | !                                                                      ! | 
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| 21 | !======================================================================= | 
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| 22 | ! | 
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| 23 | implicit none | 
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| 24 |  | 
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| 25 | PRIVATE | 
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| 26 | PUBLIC  :: sed_bed | 
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| 27 |  | 
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| 28 | CONTAINS | 
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| 29 | ! | 
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| 30 | !*********************************************************************** | 
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| 31 | SUBROUTINE sed_bed (ng, tile) | 
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| 32 | !*********************************************************************** | 
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| 33 | ! | 
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| 34 | USE mod_param | 
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| 35 | USE mod_forces | 
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| 36 | USE mod_grid | 
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| 37 | USE mod_ocean | 
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| 38 | USE mod_stepping | 
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| 39 | # ifdef BBL_MODEL | 
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| 40 | USE mod_bbl | 
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| 41 | # endif | 
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| 42 | ! | 
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| 43 | !  Imported variable declarations. | 
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| 44 | ! | 
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| 45 | integer, intent(in) :: ng, tile | 
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| 46 | ! | 
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| 47 | !  Local variable declarations. | 
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| 48 | ! | 
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| 49 | # include "tile.h" | 
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| 50 | ! | 
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| 51 | # ifdef PROFILE | 
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| 52 | CALL wclock_on (ng, iNLM, 16) | 
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| 53 | # endif | 
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| 54 | CALL sed_bed_tile (ng, tile,                                      & | 
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| 55 | &                   LBi, UBi, LBj, UBj,                            & | 
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| 56 | &                   IminS, ImaxS, JminS, JmaxS,                    & | 
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| 57 | &                   nstp(ng), nnew(ng),                            & | 
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| 58 | # ifdef WET_DRY | 
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| 59 | &                   GRID(ng) % rmask_wet,                          & | 
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| 60 | # endif | 
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| 61 | # ifdef BBL_MODEL | 
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| 62 | &                   BBL(ng) % bustrc,                              & | 
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| 63 | &                   BBL(ng) % bvstrc,                              & | 
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| 64 | &                   BBL(ng) % bustrw,                              & | 
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| 65 | &                   BBL(ng) % bvstrw,                              & | 
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| 66 | &                   BBL(ng) % bustrcwmax,                          & | 
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| 67 | &                   BBL(ng) % bvstrcwmax,                          & | 
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| 68 | # else | 
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| 69 | &                   FORCES(ng) % bustr,                            & | 
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| 70 | &                   FORCES(ng) % bvstr,                            & | 
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| 71 | # endif | 
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| 72 | &                   OCEAN(ng) % t,                                 & | 
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| 73 | # ifdef SUSPLOAD | 
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| 74 | &                   OCEAN(ng) % ero_flux,                          & | 
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| 75 | &                   OCEAN(ng) % settling_flux,                     & | 
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| 76 | # endif | 
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| 77 | # if defined SED_MORPH | 
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| 78 | &                   GRID(ng) % bed_thick,                          & | 
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| 79 | # endif | 
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| 80 | &                   OCEAN(ng) % bed,                               & | 
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| 81 | &                   OCEAN(ng) % bed_frac,                          & | 
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| 82 | &                   OCEAN(ng) % bed_mass,                          & | 
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| 83 | &                   OCEAN(ng) % bottom) | 
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| 84 | # ifdef PROFILE | 
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| 85 | CALL wclock_off (ng, iNLM, 16) | 
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| 86 | # endif | 
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| 87 | RETURN | 
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| 88 | END SUBROUTINE sed_bed | 
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| 89 | ! | 
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| 90 | !*********************************************************************** | 
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| 91 | SUBROUTINE sed_bed_tile (ng, tile,                                & | 
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| 92 | &                         LBi, UBi, LBj, UBj,                      & | 
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| 93 | &                         IminS, ImaxS, JminS, JmaxS,              & | 
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| 94 | &                         nstp, nnew,                              & | 
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| 95 | # ifdef WET_DRY | 
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| 96 | &                         rmask_wet,                               & | 
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| 97 | # endif | 
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| 98 | # ifdef BBL_MODEL | 
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| 99 | &                         bustrc, bvstrc,                          & | 
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| 100 | &                         bustrw, bvstrw,                          & | 
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| 101 | &                         bustrcwmax, bvstrcwmax,                  & | 
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| 102 | # else | 
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| 103 | &                         bustr, bvstr,                            & | 
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| 104 | # endif | 
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| 105 | &                         t,                                       & | 
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| 106 | # ifdef SUSPLOAD | 
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| 107 | &                         ero_flux, settling_flux,                 & | 
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| 108 | # endif | 
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| 109 | # if defined SED_MORPH | 
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| 110 | &                         bed_thick,                               & | 
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| 111 | # endif | 
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| 112 | &                         bed, bed_frac, bed_mass,                 & | 
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| 113 | &                         bottom) | 
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| 114 | !*********************************************************************** | 
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| 115 | ! | 
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| 116 | USE mod_param | 
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| 117 | USE mod_scalars | 
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| 118 | USE mod_sediment | 
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| 119 | ! | 
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| 120 | USE bc_3d_mod, ONLY : bc_r3d_tile | 
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| 121 | # if defined EW_PERIODIC || defined NS_PERIODIC | 
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| 122 | USE exchange_2d_mod, ONLY : exchange_r2d_tile | 
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| 123 | # endif | 
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| 124 | # ifdef DISTRIBUTE | 
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| 125 | USE mp_exchange_mod, ONLY : mp_exchange3d, mp_exchange4d | 
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| 126 | # endif | 
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| 127 | ! | 
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| 128 | !  Imported variable declarations. | 
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| 129 | ! | 
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| 130 | integer, intent(in) :: ng, tile | 
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| 131 | integer, intent(in) :: LBi, UBi, LBj, UBj | 
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| 132 | integer, intent(in) :: IminS, ImaxS, JminS, JmaxS | 
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| 133 | integer, intent(in) :: nstp, nnew | 
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| 134 | ! | 
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| 135 | # ifdef ASSUMED_SHAPE | 
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| 136 | #  ifdef WET_DRY | 
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| 137 | real(r8), intent(in) :: rmask_wet(LBi:,LBj:) | 
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| 138 | #  endif | 
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| 139 | #  ifdef BBL_MODEL | 
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| 140 | real(r8), intent(in) :: bustrc(LBi:,LBj:) | 
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| 141 | real(r8), intent(in) :: bvstrc(LBi:,LBj:) | 
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| 142 | real(r8), intent(in) :: bustrw(LBi:,LBj:) | 
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| 143 | real(r8), intent(in) :: bvstrw(LBi:,LBj:) | 
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| 144 | real(r8), intent(in) :: bustrcwmax(LBi:,LBj:) | 
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| 145 | real(r8), intent(in) :: bvstrcwmax(LBi:,LBj:) | 
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| 146 | #  else | 
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| 147 | real(r8), intent(in) :: bustr(LBi:,LBj:) | 
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| 148 | real(r8), intent(in) :: bvstr(LBi:,LBj:) | 
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| 149 | #  endif | 
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| 150 | #  if defined SED_MORPH | 
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| 151 | real(r8), intent(inout):: bed_thick(LBi:,LBj:,:) | 
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| 152 | #  endif | 
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| 153 | real(r8), intent(inout) :: t(LBi:,LBj:,:,:,:) | 
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| 154 | #  ifdef SUSPLOAD | 
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| 155 | real(r8), intent(inout) :: ero_flux(LBi:,LBj:,:) | 
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| 156 | real(r8), intent(inout) :: settling_flux(LBi:,LBj:,:) | 
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| 157 | #  endif | 
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| 158 | real(r8), intent(inout) :: bed(LBi:,LBj:,:,:) | 
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| 159 | real(r8), intent(inout) :: bed_frac(LBi:,LBj:,:,:) | 
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| 160 | real(r8), intent(inout) :: bed_mass(LBi:,LBj:,:,:,:) | 
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| 161 | real(r8), intent(inout) :: bottom(LBi:,LBj:,:) | 
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| 162 | # else | 
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| 163 | #  ifdef WET_DRY | 
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| 164 | real(r8), intent(in) :: rmask_wet(LBi:UBi,LBj:UBj) | 
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| 165 | #  endif | 
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| 166 | #  ifdef BBL_MODEL | 
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| 167 | real(r8), intent(in) :: bustrc(LBi:UBi,LBj:UBj) | 
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| 168 | real(r8), intent(in) :: bvstrc(LBi:UBi,LBj:UBj) | 
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| 169 | real(r8), intent(in) :: bustrw(LBi:UBi,LBj:UBj) | 
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| 170 | real(r8), intent(in) :: bvstrw(LBi:UBi,LBj:UBj) | 
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| 171 | real(r8), intent(in) :: bustrcwmax(LBi:UBi,LBj:UBj) | 
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| 172 | real(r8), intent(in) :: bvstrcwmax(LBi:UBi,LBj:UBj) | 
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| 173 | #  else | 
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| 174 | real(r8), intent(in) :: bustr(LBi:UBi,LBj:UBj) | 
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| 175 | real(r8), intent(in) :: bvstr(LBi:UBi,LBj:UBj) | 
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| 176 | #  endif | 
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| 177 | #  if defined SED_MORPH | 
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| 178 | real(r8), intent(inout):: bed_thick(LBi:UBi,LBj:UBj,2) | 
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| 179 | #  endif | 
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| 180 | real(r8), intent(inout) :: t(LBi:UBi,LBj:UBj,N(ng),3,NT(ng)) | 
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| 181 | #  ifdef SUSPLOAD | 
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| 182 | real(r8), intent(inout) :: ero_flux(LBi:UBi,LBj:UBj,NST) | 
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| 183 | real(r8), intent(inout) :: settling_flux(LBi:UBi,LBj:UBj,NST) | 
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| 184 | #  endif | 
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| 185 | real(r8), intent(inout) :: bed(LBi:UBi,LBj:UBj,Nbed,MBEDP) | 
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| 186 | real(r8), intent(inout) :: bed_frac(LBi:UBi,LBj:UBj,Nbed,NST) | 
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| 187 | real(r8), intent(inout) :: bed_mass(LBi:UBi,LBj:UBj,Nbed,1:2,NST) | 
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| 188 | real(r8), intent(inout) :: bottom(LBi:UBi,LBj:UBj,MBOTP) | 
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| 189 | # endif | 
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| 190 | ! | 
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| 191 | !  Local variable declarations. | 
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| 192 | ! | 
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| 193 | # ifdef DISTRIBUTE | 
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| 194 | #  ifdef EW_PERIODIC | 
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| 195 | logical :: EWperiodic=.TRUE. | 
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| 196 | #  else | 
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| 197 | logical :: EWperiodic=.FALSE. | 
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| 198 | #  endif | 
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| 199 | #  ifdef NS_PERIODIC | 
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| 200 | logical :: NSperiodic=.TRUE. | 
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| 201 | #  else | 
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| 202 | logical :: NSperiodic=.FALSE. | 
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| 203 | #  endif | 
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| 204 | # endif | 
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| 205 | integer :: Ksed, i, ised, j, k, ks | 
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| 206 | integer :: bnew | 
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| 207 |  | 
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| 208 | real(r8), parameter :: eps = 1.0E-14_r8 | 
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| 209 |  | 
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| 210 | real(r8) :: cff, cff1, cff2, cff3 | 
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| 211 | real(r8) :: thck_avail, thck_to_add | 
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| 212 |  | 
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| 213 | real(r8), dimension(IminS:ImaxS,NST) :: dep_mass | 
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| 214 | real(r8), dimension(IminS:ImaxS,JminS:JmaxS) :: tau_w | 
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| 215 |  | 
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| 216 | # include "set_bounds.h" | 
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| 217 |  | 
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| 218 | # ifdef BEDLOAD | 
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| 219 | bnew=nnew | 
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| 220 | # else | 
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| 221 | bnew=nstp | 
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| 222 | # endif | 
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| 223 | ! | 
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| 224 | !----------------------------------------------------------------------- | 
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| 225 | ! Compute sediment bed layer stratigraphy. | 
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| 226 | !----------------------------------------------------------------------- | 
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| 227 | ! | 
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| 228 | # if defined BEDLOAD_MPM || defined SUSPLOAD | 
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| 229 | #  ifdef BBL_MODEL | 
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| 230 | DO j=Jstr-1,Jend+1 | 
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| 231 | DO i=Istr-1,Iend+1 | 
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| 232 | tau_w(i,j)=SQRT(bustrcwmax(i,j)*bustrcwmax(i,j)+              & | 
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| 233 | &                    bvstrcwmax(i,j)*bvstrcwmax(i,j)) | 
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| 234 | #   ifdef WET_DRY | 
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| 235 | tau_w(i,j)=tau_w(i,j)*rmask_wet(i,j) | 
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| 236 | #   endif | 
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| 237 | END DO | 
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| 238 | END DO | 
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| 239 | #  else | 
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| 240 | #   ifdef EW_PERIODIC | 
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| 241 | #    define I_RANGE Istr-1,Iend+1 | 
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| 242 | #   else | 
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| 243 | #    define I_RANGE MAX(Istr-1,1),MIN(Iend+1,Lm(ng)) | 
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| 244 | #   endif | 
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| 245 | #   ifdef NS_PERIODIC | 
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| 246 | #    define J_RANGE Jstr-1,Jend+1 | 
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| 247 | #   else | 
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| 248 | #    define J_RANGE MAX(Jstr-1,1),MIN(Jend+1,Mm(ng)) | 
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| 249 | #   endif | 
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| 250 | DO i=I_RANGE | 
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| 251 | DO j=J_RANGE | 
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| 252 | tau_w(i,j)=0.5_r8*SQRT((bustr(i,j)+bustr(i+1,j))*             & | 
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| 253 | &                           (bustr(i,j)+bustr(i+1,j))+             & | 
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| 254 | &                           (bvstr(i,j)+bvstr(i,j+1))*             & | 
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| 255 | &                           (bvstr(i,j)+bvstr(i,j+1))) | 
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| 256 | #   ifdef WET_DRY | 
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| 257 | tau_w(i,j)=tau_w(i,j)*rmask_wet(i,j) | 
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| 258 | #   endif | 
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| 259 | END DO | 
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| 260 | END DO | 
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| 261 | #   undef I_RANGE | 
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| 262 | #   undef J_RANGE | 
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| 263 | #  endif | 
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| 264 | # endif | 
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| 265 | ! | 
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| 266 | !----------------------------------------------------------------------- | 
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| 267 | !  Update bed properties according to ero_flux and dep_flux. | 
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| 268 | !----------------------------------------------------------------------- | 
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| 269 | ! | 
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| 270 | # ifdef SUSPLOAD | 
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| 271 | J_LOOP : DO j=Jstr,Jend | 
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| 272 | SED_LOOP: DO ised=1,NST | 
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| 273 | ! | 
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| 274 | !  The deposition and resuspension of sediment on the bottom "bed" | 
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| 275 | !  is due to precepitation flux FC(:,0), already computed, and the | 
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| 276 | !  resuspension (erosion, hence called ero_flux). The resuspension is | 
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| 277 | !  applied to the bottom-most grid box value qc(:,1) so the total mass | 
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| 278 | !  is conserved. Restrict "ero_flux" so that "bed" cannot go negative | 
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| 279 | !  after both fluxes are applied. | 
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| 280 | ! | 
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| 281 | DO i=Istr,Iend | 
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| 282 | dep_mass(i,ised)=0.0_r8 | 
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| 283 |  | 
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| 284 | #  ifdef SED_MORPH | 
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| 285 | ! | 
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| 286 | ! Apply morphology factor. | 
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| 287 | ! | 
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| 288 | ero_flux(i,j,ised)=ero_flux(i,j,ised)*morph_fac(ised,ng) | 
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| 289 | settling_flux(i,j,ised)=settling_flux(i,j,ised)*            & | 
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| 290 | &                              morph_fac(ised,ng) | 
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| 291 | ! | 
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| 292 | #  endif | 
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| 293 | IF ((ero_flux(i,j,ised)-settling_flux(i,j,ised)).lt.        & | 
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| 294 | &           0.0_r8) THEN | 
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| 295 | ! | 
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| 296 | !  If first time step of deposit, then store deposit material in | 
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| 297 | !  temporary array, dep_mass. | 
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| 298 | ! | 
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| 299 | IF ((time(ng).gt.(bed(i,j,1,iaged)+1.1_r8*dt(ng))).and.   & | 
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| 300 | &            (bed(i,j,1,ithck).gt.newlayer_thick(ng))) THEN | 
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| 301 | dep_mass(i,ised)=settling_flux(i,j,ised)-               & | 
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| 302 | &                           ero_flux(i,j,ised) | 
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| 303 | END IF | 
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| 304 | bed(i,j,1,iaged)=time(ng) | 
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| 305 | END IF | 
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| 306 | ! | 
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| 307 | !  Update bed mass arrays. | 
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| 308 | ! | 
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| 309 | bed_mass(i,j,1,nnew,ised)=MAX(bed_mass(i,j,1,bnew,ised)-    & | 
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| 310 | &                                   (ero_flux(i,j,ised)-           & | 
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| 311 | &                                    settling_flux(i,j,ised)),     & | 
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| 312 | &                                    0.0_r8) | 
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| 313 | DO k=2,Nbed | 
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| 314 | bed_mass(i,j,k,nnew,ised)=bed_mass(i,j,k,nstp,ised) | 
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| 315 | END DO | 
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| 316 | END DO | 
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| 317 | END DO SED_LOOP | 
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| 318 | ! | 
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| 319 | !  If first time step of deposit, create new layer and combine bottom | 
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| 320 | !  two bed layers. | 
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| 321 | ! | 
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| 322 | DO i=Istr,Iend | 
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| 323 | cff=0.0_r8 | 
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| 324 | ! | 
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| 325 | !  Determine if deposition ocurred here. | 
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| 326 | ! | 
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| 327 | IF (Nbed.gt.1) THEN | 
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| 328 | DO ised=1,NST | 
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| 329 | cff=cff+dep_mass(i,ised) | 
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| 330 | END DO | 
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| 331 | IF (cff.gt.0.0_r8) THEN | 
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| 332 | ! | 
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| 333 | !  Combine bottom layers. | 
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| 334 | ! | 
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| 335 | bed(i,j,Nbed,iporo)=0.5_r8*(bed(i,j,Nbed-1,iporo)+        & | 
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| 336 | &                                    bed(i,j,Nbed,iporo)) | 
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| 337 | bed(i,j,Nbed,iaged)=0.5_r8*(bed(i,j,Nbed-1,iaged)+        & | 
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| 338 | &                                    bed(i,j,Nbed,iaged)) | 
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| 339 | DO ised=1,NST | 
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| 340 | bed_mass(i,j,Nbed,nnew,ised)=                           & | 
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| 341 | &                             bed_mass(i,j,Nbed-1,nnew,ised)+      & | 
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| 342 | &                             bed_mass(i,j,Nbed  ,nnew,ised) | 
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| 343 | END DO | 
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| 344 | ! | 
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| 345 | !  Push layers down. | 
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| 346 | ! | 
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| 347 | DO k=Nbed-1,2,-1 | 
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| 348 | bed(i,j,k,iporo)=bed(i,j,k-1,iporo) | 
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| 349 | bed(i,j,k,iaged)=bed(i,j,k-1,iaged) | 
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| 350 | DO ised =1,NST | 
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| 351 | bed_mass(i,j,k,nnew,ised)=bed_mass(i,j,k-1,nnew,ised) | 
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| 352 | END DO | 
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| 353 | END DO | 
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| 354 | ! | 
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| 355 | !  Set new top layer parameters. | 
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| 356 | ! | 
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| 357 | DO ised=1,NST | 
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| 358 | bed_mass(i,j,2,nnew,ised)=MAX(bed_mass(i,j,2,nnew,ised)- & | 
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| 359 | &                                    dep_mass(i,ised),0.0_r8) | 
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| 360 | bed_mass(i,j,1,nnew,ised)=dep_mass(i,ised) | 
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| 361 | END DO | 
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| 362 | END IF | 
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| 363 | END IF !NBED=1 | 
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| 364 | ! | 
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| 365 | ! Recalculate thickness and fractions for all layers. | 
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| 366 | ! | 
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| 367 | DO k=1,Nbed | 
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| 368 | cff3=0.0_r8 | 
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| 369 | DO ised=1,NST | 
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| 370 | cff3=cff3+bed_mass(i,j,k,nnew,ised) | 
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| 371 | END DO | 
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| 372 | IF (cff3.eq.0.0_r8) THEN | 
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| 373 | cff3=eps | 
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| 374 | END IF | 
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| 375 | bed(i,j,k,ithck)=0.0_r8 | 
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| 376 | DO ised=1,NST | 
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| 377 | bed_frac(i,j,k,ised)=bed_mass(i,j,k,nnew,ised)/cff3 | 
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| 378 | bed(i,j,k,ithck)=MAX(bed(i,j,k,ithck)+                    & | 
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| 379 | &                         bed_mass(i,j,k,nnew,ised)/               & | 
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| 380 | &                         (Srho(ised,ng)*                          & | 
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| 381 | &                          (1.0_r8-bed(i,j,k,iporo))),0.0_r8) | 
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| 382 | END DO | 
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| 383 | END DO | 
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| 384 | END DO | 
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| 385 | END DO J_LOOP | 
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| 386 | ! | 
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| 387 | !  End of Suspended Sediment only section. | 
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| 388 | ! | 
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| 389 | # endif | 
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| 390 | ! | 
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| 391 | !  Ensure top bed layer thickness is greater or equal than active layer | 
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| 392 | !  thickness. If need to add sed to top layer, then entrain from lower | 
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| 393 | !  levels. Create new layers at bottom to maintain Nbed. | 
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| 394 | ! | 
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| 395 | J_LOOP2 : DO j=Jstr,Jend | 
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| 396 | DO i=Istr,Iend | 
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| 397 | ! | 
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| 398 | !  Calculate active layer thickness, bottom(i,j,iactv). | 
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| 399 | ! | 
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| 400 | bottom(i,j,iactv)=MAX(0.0_r8,                                 & | 
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| 401 | &                          0.007_r8*                               & | 
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| 402 | &                          (tau_w(i,j)-bottom(i,j,itauc))*rho0)+   & | 
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| 403 | &                          6.0_r8*bottom(i,j,isd50) | 
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| 404 | ! | 
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| 405 | # ifdef SED_MORPH | 
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| 406 | ! | 
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| 407 | ! Apply morphology factor. | 
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| 408 | ! | 
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| 409 | bottom(i,j,iactv)=MAX(bottom(i,j,iactv)*morph_fac(1,ng),      & | 
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| 410 | &                          bottom(i,j,iactv)) | 
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| 411 | # endif | 
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| 412 | ! | 
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| 413 | IF (bottom(i,j,iactv).gt.bed(i,j,1,ithck)) THEN | 
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| 414 | IF (Nbed.eq.1) THEN | 
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| 415 | bottom(i,j,iactv)=bed(i,j,1,ithck) | 
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| 416 | ELSE | 
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| 417 | thck_to_add=bottom(i,j,iactv)-bed(i,j,1,ithck) | 
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| 418 | thck_avail=0.0_r8 | 
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| 419 | Ksed=1                                        ! initialize | 
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| 420 | DO k=2,Nbed | 
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| 421 | IF (thck_avail.lt.thck_to_add) THEN | 
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| 422 | thck_avail=thck_avail+bed(i,j,k,ithck) | 
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| 423 | Ksed=k | 
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| 424 | END IF | 
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| 425 | END DO | 
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| 426 | ! | 
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| 427 | !  Catch here if there was not enough bed material. | 
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| 428 | ! | 
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| 429 | IF (thck_avail.lt.thck_to_add) THEN | 
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| 430 | bottom(i,j,iactv)=bed(i,j,1,ithck)+thck_avail | 
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| 431 | thck_to_add=thck_avail | 
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| 432 | END IF | 
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| 433 | ! | 
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| 434 | !  Update bed mass of top layer and fractional layer. | 
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| 435 | ! | 
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| 436 | cff2=MAX(thck_avail-thck_to_add,0.0_r8)/                  & | 
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| 437 | &             MAX(bed(i,j,Ksed,ithck),eps) | 
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| 438 | DO ised=1,NST | 
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| 439 | cff1=0.0_r8 | 
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| 440 | DO k=1,Ksed | 
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| 441 | cff1=cff1+bed_mass(i,j,k,nnew,ised) | 
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| 442 | END DO | 
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| 443 | cff3=cff2*bed_mass(i,j,Ksed,nnew,ised) | 
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| 444 | bed_mass(i,j,1   ,nnew,ised)=cff1-cff3 | 
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| 445 | bed_mass(i,j,Ksed,nnew,ised)=cff3 | 
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| 446 | END DO | 
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| 447 | ! | 
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| 448 | !  Update thickness of fractional layer ksource_sed. | 
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| 449 | ! | 
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| 450 | bed(i,j,Ksed,ithck)=MAX(thck_avail-thck_to_add,0.0_r8) | 
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| 451 | ! | 
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| 452 | !  Upate bed fraction of top layer. | 
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| 453 | ! | 
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| 454 | cff3=0.0_r8 | 
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| 455 | DO ised=1,NST | 
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| 456 | cff3=cff3+bed_mass(i,j,1,nnew,ised) | 
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| 457 | END DO | 
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| 458 | IF (cff3.eq.0.0_r8) THEN | 
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| 459 | cff3=eps | 
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| 460 | END IF | 
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| 461 | DO ised=1,NST | 
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| 462 | bed_frac(i,j,1,ised)=bed_mass(i,j,1,nnew,ised)/cff3 | 
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| 463 | END DO | 
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| 464 | ! | 
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| 465 | !  Upate bed thickness of top layer. | 
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| 466 | ! | 
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| 467 | bed(i,j,1,ithck)=bottom(i,j,iactv) | 
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| 468 | ! | 
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| 469 | !  Pull all layers closer to the surface. | 
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| 470 | ! | 
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| 471 | DO k=Ksed,Nbed | 
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| 472 | ks=Ksed-2 | 
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| 473 | bed(i,j,k-ks,ithck)=bed(i,j,k,ithck) | 
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| 474 | bed(i,j,k-ks,iporo)=bed(i,j,k,iporo) | 
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| 475 | bed(i,j,k-ks,iaged)=bed(i,j,k,iaged) | 
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| 476 | DO ised=1,NST | 
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| 477 | bed_frac(i,j,k-ks,ised)=bed_frac(i,j,k,ised) | 
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| 478 | bed_mass(i,j,k-ks,nnew,ised)=bed_mass(i,j,k,nnew,ised) | 
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| 479 | END DO | 
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| 480 | END DO | 
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| 481 | ! | 
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| 482 | !  Add new layers onto the bottom. Split what was in the bottom layer to | 
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| 483 | !  fill these new empty cells. ("ks" is the number of new layers). | 
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| 484 | ! | 
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| 485 | ks=Ksed-2 | 
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| 486 | cff=1.0_r8/REAL(ks+1,r8) | 
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| 487 | DO k=Nbed,Nbed-ks,-1 | 
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| 488 | bed(i,j,k,ithck)=bed(i,j,Nbed-ks,ithck)*cff | 
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| 489 | bed(i,j,k,iaged)=bed(i,j,Nbed-ks,iaged) | 
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| 490 | DO ised=1,NST | 
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| 491 | bed_frac(i,j,k,ised)=bed_frac(i,j,Nbed-ks,ised) | 
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| 492 | bed_mass(i,j,k,nnew,ised)=                            & | 
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| 493 | &                             bed_mass(i,j,Nbed-ks,nnew,ised)*cff | 
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| 494 | END DO | 
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| 495 | END DO | 
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| 496 | END IF  ! Nbed > 1 | 
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| 497 | END IF  ! increase top bed layer | 
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| 498 | END DO | 
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| 499 | END DO J_LOOP2 | 
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| 500 | ! | 
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| 501 | !----------------------------------------------------------------------- | 
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| 502 | ! Store old bed thickness. | 
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| 503 | !----------------------------------------------------------------------- | 
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| 504 | ! | 
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| 505 | # if defined SED_MORPH | 
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| 506 | DO j=JstrR,JendR | 
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| 507 | DO i=IstrR,IendR | 
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| 508 | bed_thick(i,j,nnew)=0.0_r8 | 
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| 509 | DO k=1,Nbed | 
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| 510 | bed_thick(i,j,nnew)=bed_thick(i,j,nnew)+                  & | 
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| 511 | &                            bed(i,j,k,ithck) | 
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| 512 | END DO | 
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| 513 | END DO | 
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| 514 | END DO | 
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| 515 | #  if defined EW_PERIODIC || defined NS_PERIODIC | 
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| 516 | CALL exchange_r2d_tile (ng, tile,                               & | 
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| 517 | &                          LBi, UBi, LBj, UBj,                     & | 
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| 518 | &                          bed_thick(:,:,nnew)) | 
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| 519 | #  endif | 
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| 520 | # endif | 
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| 521 | ! | 
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| 522 | !----------------------------------------------------------------------- | 
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| 523 | !  Apply periodic or gradient boundary conditions to property arrays. | 
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| 524 | !----------------------------------------------------------------------- | 
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| 525 | ! | 
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| 526 | DO ised=1,NST | 
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| 527 | CALL bc_r3d_tile (ng, tile,                                     & | 
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| 528 | &                    LBi, UBi, LBj, UBj, 1, Nbed,                  & | 
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| 529 | &                    bed_frac(:,:,:,ised)) | 
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| 530 | CALL bc_r3d_tile (ng, tile,                                     & | 
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| 531 | &                    LBi, UBi, LBj, UBj, 1, Nbed,                  & | 
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| 532 | &                    bed_mass(:,:,:,nnew,ised)) | 
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| 533 | END DO | 
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| 534 | # ifdef DISTRIBUTE | 
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| 535 | CALL mp_exchange4d (ng, tile, iNLM, 2,                            & | 
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| 536 | &                    LBi, UBi, LBj, UBj, 1, Nbed, 1, NST,          & | 
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| 537 | &                    NghostPoints, EWperiodic, NSperiodic,         & | 
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| 538 | &                    bed_frac,                                     & | 
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| 539 | &                    bed_mass(:,:,:,nnew,:)) | 
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| 540 | # endif | 
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| 541 |  | 
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| 542 | DO i=1,MBEDP | 
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| 543 | CALL bc_r3d_tile (ng, tile,                                     & | 
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| 544 | &                    LBi, UBi, LBj, UBj, 1, Nbed,                  & | 
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| 545 | &                    bed(:,:,:,i)) | 
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| 546 | END DO | 
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| 547 | # ifdef DISTRIBUTE | 
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| 548 | CALL mp_exchange4d (ng, tile, iNLM, 1,                            & | 
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| 549 | &                    LBi, UBi, LBj, UBj, 1, Nbed, 1, MBEDP,        & | 
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| 550 | &                    NghostPoints, EWperiodic, NSperiodic,         & | 
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| 551 | &                    bed) | 
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| 552 | # endif | 
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| 553 |  | 
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| 554 | RETURN | 
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| 555 | END SUBROUTINE sed_bed_tile | 
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| 556 | #endif | 
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| 557 | END MODULE sed_bed_mod | 
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