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CALSFT.for
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CALSFT.for
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SUBROUTINE CALSFT(ISTL_,IS2TL_)
C
C CHANGE RECORD
C ** SUBROUTINE CALSFT CALCULATES THE TRANSPORT OF SHELL FISH LARVAE
C ** AT TIME LEVEL (N+1).
C ** CALLED ONLY ON ODD THREE TIME LEVEL STEPS (PMC - NO, CALLED IN BOTH HDMT & HDMT2T)
C
USE GLOBAL
! *** DSLLC BEGIN BLOCK
REAL,SAVE,ALLOCATABLE,DIMENSION(:)::WTFKB
REAL,SAVE,ALLOCATABLE,DIMENSION(:)::WTFKC
IF(.NOT.ALLOCATED(WTFKB))THEN
ALLOCATE(WTFKB(KCM))
ALLOCATE(WTFKC(KCM))
! *** ZERO LOCAL ARRAYS
WTFKB=0.0
WTFKC=0.0
ENDIF
! *** DSLLC END BLOCK
C
CPMC DELT=DT2
! *** PMC
IF(ISTL_.EQ.2)THEN
IF(ISDYNSTP.EQ.0)THEN
DELT=DT
ELSE
DELT=DTDYN
END IF
ELSE
DELT=DT2
ENDIF
! *** PMC
C
C ** UPDATED TIME SERIES CONCENTRATION BOUNDARY CONDITIONS
C ** DETERMINE IF CURRENT TIME STEP IS DURING DAYLIGHT OR DARKNESS
C
IF(ISSFLDN.GE.1)THEN
ISDARK=1
IF(ISDYNSTP.EQ.0)THEN
TIME=(DT*FLOAT(N)+TCON*TBEGIN)/86400.
ELSE
TIME=TIMESEC/86400.
ENDIF
ITIME=INT(TIME)
RTIME=FLOAT(ITIME)
TIMTMP=TIME-RTIME
IF(TIMTMP.GE.TSRSF.AND.TIMTMP.LE.TSSSF) ISDARK=0
ENDIF
C
C ** DETERMINE IF LOCAL CONDITIONS ARE EBB OR FLOOD
C
IF(ISSFLFE.GE.1)THEN
IF(KC.EQ.1)THEN
WTFKB(1)=1.
WTFKC(1)=0.
ENDIF
IF(KC.EQ.2)THEN
WTFKB(1)=1.0
WTFKC(1)=0.0
WTFKB(2)=0.0
WTFKC(2)=1.0
ENDIF
IF(KC.EQ.3)THEN
DO K=1,KC
WTFKB(K)=FLOAT(KC-K)/FLOAT(KS)
WTFKC(K)=1.0-WTFKB(K)
ENDDO
ENDIF
C
C ** SET SWITCHES TO EBB
C
DO K=1,KC
DO L=2,LA
UUU(L,K)=0.
VVV(L,K)=1.
ENDDO
ENDDO
C
C ** RESET SWITCHES FOR FLOOD
C
DO K=1,KC
DO L=2,LA
LN=LNC(L)
FANGTMP=ACCWFLD(L,1)*WTFKB(K)+ACCWFLD(L,2)*WTFKC(K)
UTMP=0.5*STCUV(L)*(UWQ(L+1,K)+UWQ(L,K))
VTMP=0.5*STCUV(L)*(VWQ(LN ,K)+VWQ(L,K))
VELEKB=CUE(L)*UTMP+CVE(L)*VTMP+1.E-12
VELNKB=CUN(L)*UTMP+CVN(L)*VTMP
CURANG=ATAN2(VELNKB,VELEKB)
ANGDIF=ABS(FANGTMP-CURANG)
IF(ANGDIF.LT.1.5708)THEN
UUU(L,K)=1.
VVV(L,K)=0.
ENDIF
ENDDO
ENDDO
ENDIF
C
C ** SET UP ADVECTION FIELD
C ** SET ATTACHED TO BOTTOM AND NO ADVECTIVE TRANSPORT IN BOTTOM
C ** LAYER DURING EBB IF APPROPRIATE
C
IF(ISSFLFE.GE.1)THEN
IF(SFNTBET.LT.1.)THEN
K=1
DO L=2,LA
LN=LNC(L)
UHDYWQ(L,K)=UUU(L,1)*UHDYWQ(L,1)+SFNTBET*VVV(L,1)*UHDYWQ(L,1)
VHDXWQ(L,K)=UUU(L,1)*UHDYWQ(L,1)+SFNTBET*VVV(L,1)*VHDXWQ(L,1)
UWQ(L,K)=UUU(L,1)*UWQ(L,1)+SFNTBET*VVV(L,1)*UWQ(L,1)
VWQ(L,K)=UUU(L,1)*VWQ(L,1)+SFNTBET*VVV(L,1)*VWQ(L,1)
ENDDO
ENDIF
ENDIF
! *** COMPUTE SHELLFISH LARVAE ADVECTION
CALL CALTRAN (ISTL_,IS2TL_,4,4,SFL,SFL2)
!CALL CALTRWQ (4,0,SFL,SFL2) ! PMC
C
C ** SET UP VERTICAL MIGRATION AND SETTLING BEHAVIOR
C ** INITIALIZE VERTICAL VELOCTIY TO TIME DEPENDENT SETTLING VELOCITY
C
DO K=1,KS
DO L=2,LA
WWQ(L,K)=-WSFLSTT
ENDDO
ENDDO
DO L=2,LA
WWQ(L,KC)=0.
WWQ(L,0)=0.
ENDDO
IF(ISSFLFE.GE.1.AND.ISSFLDN.GE.1)THEN
C
C ** DAYLIGHT CONDITIONS
C
IF(ISDARK.EQ.0)THEN
DO K=1,KS
RABOVE=FLOAT(KC-K)/FLOAT(KC)
DO L=2,LA
C
C ** DETERMINE DISTANCE TO SURFACE
C
HABOVE=RABOVE*HWQ(L)
IF(UUU(L,K).GT.0.)THEN
C
C ** FLOOD CONDITION : SWIM UP TO MIN DIST BELOW SURFACE
C
IF(HABOVE.GT.DSFLMNT) WWQ(L,K)=WSFLSMT
ELSE
C
C ** EBB CONDITION : CONTINUE TO SINK OR SWIM UP TO MAX DIST BL SURF
C
IF(HABOVE.GT.DSFLMXT) WWQ(L,K)=WSFLSMT
ENDIF
ENDDO
ENDDO
ENDIF
C
C ** DARK CONDITIONS
C
IF(ISDARK.EQ.1)THEN
DO K=1,KS
DO L=2,LA
C
C ** FLOOD CONDITION : SWIM UP TO SURFACE
C
WWQ(L,K)=VVV(L,K)*WWQ(L,K)+UUU(L,K)*WSFLSMT
ENDDO
ENDDO
ENDIF
ENDIF
IF(SFATBTT.GT.0.)THEN
DO L=2,LA
WWQ(L,0)=-WSFLSTT
ENDDO
ENDIF
C
C ** CALCULATE NET VERTICAL SWIMING OR SETTLING
C
IF(WSFLSMT.EQ.0.) GOTO 100
C
C ** LIMIT VERTICAL SETTLING AND/OR SWIMMING FOR STABILITY
C
DO K=0,KS
DO L=2,LA
WWW(L,K)=MIN(WWQ(L,K),0.)
WWW(L,K)=ABS(WWW(L,K))
WWQ(L,K)=MAX(WWQ(L,K),0.)
ENDDO
ENDDO
TMPVAL=0.25/(DELT*FLOAT(KC))
DO K=1,KS
DO L=2,LA
WMAXX=TMPVAL*HWQ(L)
WWW(L,K)=MIN(WWW(L,K),WMAXX)
WWQ(L,K)=MIN(WWQ(L,K),WMAXX)
WWQ(L,K)=WWQ(L,K)-WWW(L,K)
ENDDO
ENDDO
DO K=1,KS
DO L=2,LA
FWU(L,K)=MAX(WWQ(L,K),0.)*SFL(L,K)
& +MIN(WWQ(L,K),0.)*SFL(L,K+1)
ENDDO
ENDDO
IF(SFATBTT.GT.0.)THEN
DO L=2,LA
SFLSBOT(L)=SFLSBOT(L)-DELT*FWU(L,0)
ENDDO
ENDIF
DO K=1,KC
DO L=2,LA
SFL(L,K)=SFL(L,K)
& +DELT*(FWU(L,K-1)-FWU(L,K))*DZIC(K)/HWQ(L)
ENDDO
ENDDO
GOTO 200
100 CONTINUE
C
C ** FULLY IMPLICIT SETTLING IF SWIMMING IS ZERO EVERYWHERE
C ** FULLY IMPLICIT SETTLING IN SURFACE LAYER
C
TMPVAL=DELT*WSFLSTT
DZCIT=TMPVAL/DZC(KC)
DO L=2,LA
TMPVAL1=DZCIT/HWQ(L)
SFL(L,KC)=SFL(L,KC)/(1.+TMPVAL1)
ENDDO
C
C ** FULLY IMPLICIT SETTLING IN REMAINING LAYERS
C
IF(KC.GT.1)THEN
DO K=KS,1,-1
DZCIT=TMPVAL/DZC(K)
DO L=2,LA
TMPVAL1=DZCIT/HWQ(L)
SFL(L,K)=(SFL(L,K)+TMPVAL1*SFL(L,K+1))/(1.+TMPVAL1)
ENDDO
ENDDO
ENDIF
IF(SFATBTT.GT.0.)THEN
DO L=2,LA
SFLSBOT(L)=SFLSBOT(L)+TMPVAL*SFL(L,1)
ENDDO
ENDIF
200 CONTINUE
DO L=2,LA
FWU(L,0)=0.
WWQ(L,0)=0.
WWW(L,0)=0.
ENDDO
C
C ** CALCULATE LINEAR DECAY
C
IF(RKDSFLT.GE.0.)THEN
CDYETMP=1./(1.+DELT*RKDSFLT)
DO K=1,KC
DO L=2,LA
SFL(L,K)=CDYETMP*SFL(L,K)
ENDDO
ENDDO
ENDIF
IF(KC.EQ.1) GOTO 2000
C
C ** VERTICAL DIFFUSION CALCULATION
C
DO L=2,LA
HWQI(L)=1./HWQ(L)
ENDDO
RCDZKK=-DELT*CDZKK(1)
DO ND=1,NDM
LF=2+(ND-1)*LDM
LL=LF+LDM-1
DO L=LF,LL
CCUBTMP=RCDZKK*HWQI(L)*AB(L,1)
CCMBTMP=1.-CCUBTMP
EEB=1./CCMBTMP
CU1(L,1)=CCUBTMP*EEB
SFL(L,1)=SFL(L,1)*EEB
ENDDO
ENDDO
DO ND=1,NDM
LF=2+(ND-1)*LDM
LL=LF+LDM-1
DO K=2,KS
RCDZKMK=-DELT*CDZKMK(K)
RCDZKK=-DELT*CDZKK(K)
DO L=LF,LL
CCLBTMP=RCDZKMK*HWQI(L)*AB(L,K-1)
CCUBTMP=RCDZKK*HWQI(L)*AB(L,K)
CCMBTMP=1.-CCLBTMP-CCUBTMP
EEB=1./(CCMBTMP-CCLBTMP*CU1(L,K-1))
CU1(L,K)=CCUBTMP*EEB
SFL(L,K)=(SFL(L,K)-CCLBTMP*SFL(L,K-1))*EEB
ENDDO
ENDDO
ENDDO
K=KC
RCDZKMK=-DELT*CDZKMK(K)
DO ND=1,NDM
LF=2+(ND-1)*LDM
LL=LF+LDM-1
DO L=LF,LL
CCLBTMP=RCDZKMK*HWQI(L)*AB(L,K-1)
CCMBTMP=1.-CCLBTMP
EEB=1./(CCMBTMP-CCLBTMP*CU1(L,K-1))
SFL(L,K)=(SFL(L,K)-CCLBTMP*SFL(L,K-1))*EEB
ENDDO
ENDDO
DO ND=1,NDM
LF=2+(ND-1)*LDM
LL=LF+LDM-1
DO K=KC-1,1,-1
DO L=LF,LL
SFL(L,K)=SFL(L,K)-CU1(L,K)*SFL(L,K+1)
ENDDO
ENDDO
ENDDO
C
C ** UPDATE SHELL FISH LARVAE CONCENTRATIONS
C
2000 CONTINUE
DO K=1,KC
DO L=2,LA
SFL2(L,K)=SFL(L,K)
ENDDO
ENDDO
RETURN
END