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CALPUV2T.for
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CALPUV2T.for
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SUBROUTINE CALPUV2T
C
C CHANGE RECORD
C ADDED ALTERNATE SOR EQUATION SOLVER RELAX2T
C ** SUBROUTINE CALPUV2T CALCULATES THE EXTERNAL SOLUTION FOR P, UHDYE,
C ** AND VHDXE, FOR FREE SURFACE FLOWS WITH PROVISIONS FOR WETTING
C ** AND DRYING OF CELLS
C
C ** SIGNIFICANTLY REWRITTEN SUBROUTINE BY PAUL M. CRAIG ON DEC-2004 TO
C ** ADDRESS INSTABIITIES. MODIFIED THE OPEN BOUNDARY CONDITION TREATMENT
C ** AND THE GENERATION OF THE FP ARRAY USED IN THE CONGRAD SOLVER.
C
USE GLOBAL
REAL,SAVE,ALLOCATABLE,DIMENSION(:)::QCHANUT
REAL,SAVE,ALLOCATABLE,DIMENSION(:)::QCHANVT
REAL,SAVE,ALLOCATABLE,DIMENSION(:)::QSUMTMP
IF(.NOT.ALLOCATED(QCHANUT))THEN
ALLOCATE(QCHANUT(NCHANM))
ALLOCATE(QCHANVT(NCHANM))
ALLOCATE(QSUMTMP(LCM))
QCHANUT=0.0
QCHANVT=0.0
QSUMTMP=0.0
ENDIF
C
IF(N.EQ.1)NHILOW=0
IF(DEBUG)THEN
IF(N.EQ.1.AND.ISDSOLV.EQ.1)THEN
OPEN(1,FILE='FUV1.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQCOEF1.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQTERM1.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='FP.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
ENDIF
IF(N.EQ.2.AND.ISDSOLV.EQ.1)THEN
OPEN(1,FILE='FUV2.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQCOEF2.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQTERM2.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='FP2.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
ENDIF
IF(ISDSOLV.EQ.1)THEN
OPEN(1,FILE='FUV.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQCOEF.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='EQTERM.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
OPEN(1,FILE='FP.OUT',STATUS='UNKNOWN')
CLOSE(1,STATUS='DELETE')
ENDIF
ENDIF
IF(ISDYNSTP.EQ.0)THEN
DELT=DT
DELTD2=0.5*DT
DELTI=1./DELT
ELSE
DELT=DTDYN
DELTD2=0.5*DTDYN
DELTI=1./DELT
END IF
ISTL=2
C
C ** CALCULATE EXPLICIT EXTERNAL PRESSURE GRADIENTS, IF NEEDED
C
IF(BSC.GT.1.E-6)THEN
! *** CALCULATE EXTERNAL BUOYANCY INTEGRALS AT TIME LEVEL (N)
CALL CALEBI
C
! *** CALCULATE EXPLICIT EXTERNAL PRESSURE GRADIENTS
DO L=2,LA
!SBX(L)=0.5*SUB(L)*DYU(L) !See "EFDC Buoyancy Issues.doc" for this correction
! FPGXE(L)=-SBX(L)*HU(L)*GP*((BI2(L)+BI2(L-1))*(HP(L)-HP(L-1))
! & +2.0*HU(L)*(BI1(L)-BI1(L-1))
! & +(BE(L)+BE(L-1))*(BELV(L)-BELV(L-1)))
FPGXE(L)=-SBX(L)*HU(L)*GP*((BI2(L)+BI2(L-1))*(HP(L)-HP(L-1))
& +HU(L)*(BI1(L)-BI1(L-1))
& +(BE(L)+BE(L-1))*(BELV(L)-BELV(L-1)))
ENDDO
DO L=2,LA
LS=LSC(L)
!SBY(L)=0.5*SVB(L)*DXV(L) !See "EFDC Buoyancy Issues.doc" for this correction
! FPGYE(L)=-SBY(L)*HV(L)*GP*((BI2(L)+BI2(LS))*(HP(L)-HP(LS))
! & +2.0*HV(L)*(BI1(L)-BI1(LS))
! & +(BE(L)+BE(LS))*(BELV(L)-BELV(LS)))
FPGYE(L)=-SBY(L)*HV(L)*GP*((BI2(L)+BI2(LS))*(HP(L)-HP(LS))
& +HV(L)*(BI1(L)-BI1(LS))
& +(BE(L)+BE(LS))*(BELV(L)-BELV(LS)))
ENDDO
ENDIF
C
C ** CALCULATE EXPLICIT EXTERNAL UHDYE AND VHDXE EQUATION TERMS
C ** HRU=SUB*HMU*DYU/DXU & HRV=SVB*HMV*DXV/DYV
C
DO L=2,LA
LS=LSC(L)
!DXYU(L)=DXU(L)*DYU(L)
!DXIU(L)=1./DXU(L)
!HRUO(L)=SUBO(L)*DYU(L)*DXIU(L)
FUHDYE(L)=UHDYE(L)
& -DELTD2*SUB(L)*HRUO(L)*HU(L)*(P(L)-P(L-1))
& +SUB(L)*DELT*DXIU(L)*(DXYU(L)*(TSX(L)-RITB1*TBX(L))
& +FCAXE(L)+FPGXE(L)-SNLT*FXE(L))
C
!DXYV(L)=DXV(L)*DYV(L)
!DYIV(L)=1./DYV(L)
!HRVO(L)=SVBO(L)*DXV(L)*DYIV(L)
FVHDXE(L)=VHDXE(L)
& -DELTD2*SVB(L)*HRVO(L)*HV(L)*(P(L)-P(LS ))
& +SVB(L)*DELT*DYIV(L)*(DXYV(L)*(TSY(L)-RITB1*TBY(L))
& -FCAYE(L)+FPGYE(L)-SNLT*FYE(L))
ENDDO
IF(ISDSOLV.GE.1.AND.DEBUG)THEN
OPEN(1,FILE='FUV.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),UHDY1E(L),HRUO(L),HU(L),P1(L),
& P1(L-1),TSX1(L),TBX1(L),FCAXE(L),FPGXE(L),FXE(L)
ENDDO
CLOSE(1)
IF(N.EQ.1)THEN
OPEN(1,FILE='FUV1.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),UHDY1E(L),HRUO(L),HU(L),P1(L),
& P1(L-1),TSX1(L),TBX1(L),FCAXE(L),FPGXE(L),FXE(L)
ENDDO
CLOSE(1)
ENDIF
IF(N.EQ.2)THEN
OPEN(1,FILE='FUV2.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),UHDY1E(L),HRUO(L),HU(L),P1(L),
& P1(L-1),TSX1(L),TBX1(L),FCAXE(L),FPGXE(L),FXE(L)
ENDDO
CLOSE(1)
ENDIF
ENDIF
C
C ** SET IMPLICIT BOTTOM AND VEGETATION DRAG AS APPROPRIATE
C
DO L=2,LA
RCX(L)=1.
RCY(L)=1.
ENDDO
RCX(1)=0.
RCY(1)=0.
RCX(LC)=0.
RCY(LC)=0.
C
C * SINGLE LAYER NO VEGETATION
C
IF(KC.EQ.1)THEN
IF(ISVEG.EQ.0.AND.RITB.GT.0.)THEN
DO L=2,LA
RCX(L)=1./( 1.
& +RITB*DELT*HUI(L)*STBX(L)*SQRT(VU(L)*VU(L)+U(L,1)*U(L,1)))
RCY(L)=1./( 1.
& +RITB*DELT*HVI(L)*STBY(L)*SQRT(UV(L)*UV(L)+V(L,1)*V(L,1)))
FUHDYE(L)=FUHDYE(L)*RCX(L)
FVHDXE(L)=FVHDXE(L)*RCY(L)
ENDDO
ENDIF
C
C * SINGLE LAYER WITH VEGETATION
C
IF(ISVEG.GE.1)THEN
DO L=2,LA
RCX(L)=1./( 1.
& +RITB*DELT*HUI(L)*STBX(L)*SQRT(VU(L)*VU(L)+U(L,1)*U(L,1))
& +DELT*FXVEGE(L) )
RCY(L)=1./( 1.
& +RITB*DELT*HVI(L)*STBY(L)*SQRT(UV(L)*UV(L)+V(L,1)*V(L,1))
& +DELT*FYVEGE(L) )
FUHDYE(L)=FUHDYE(L)*RCX(L)
FVHDXE(L)=FVHDXE(L)*RCY(L)
ENDDO
ENDIF
ENDIF
C
C * MULTIPLE LAYERS WITH VEGETATION
C
IF(KC.GT.1.AND.ISVEG.GE.1)THEN
DO L=2,LA
RCX(L)=1./( 1.+DELT*FXVEGE(L) )
RCY(L)=1./( 1.+DELT*FYVEGE(L) )
FUHDYE(L)=FUHDYE(L)*RCX(L)
FVHDXE(L)=FVHDXE(L)*RCY(L)
ENDDO
ENDIF
C
C ** ADJUST VOLUME SOURCE AND SINKS
C
IF(ISGWIE.EQ.0)THEN
DO L=2,LA
IF(QSUME(L).LE.0.)THEN
IF(H1P(L).LE.HDRY)THEN
QSUMTMP(L)=0.
ELSE
QSUMTMP(L)=-(H1P(L)-HDRY)*DXYP(L)*DELTI
QSUMTMP(L)=MAX(QSUMTMP(L),QSUME(L))
ENDIF
ELSE
QSUMTMP(L)=QSUME(L)
ENDIF
ENDDO
DO L=2,LA
DIFQVOL=QSUME(L)-QSUMTMP(L)
DO K=1,KC
QSUM(L,K)=QSUM(L,K)-DIFQVOL*DZC(K)
ENDDO
QSUME(L)=QSUMTMP(L)
ENDDO
ENDIF
C
C ** ADJUST SOURCES AND SINKS ESTIMATING SURFACE AND GROUNDWATER
C ** AVAILABLE FOR EVAPOTRANSPIRATON AND INFILTRATION
C
IF(ISGWIE.GE.1)THEN
DO L=2,LA
RIFTR(L)=0.
EVAPSW(L)=0.
EVAPGW(L)=0.
IF(H1P(L).GT.HDRY)THEN
C
C APPLY MAXIMUM ET
C
IF(EVAPCVT.LT.0.)THEN
SVPW=(10.**((0.7859+0.03477*TEM(L,KC))/
& (1.+0.00412*TEM(L,KC))))
EVAPT(L)=CLEVAP(L)*0.7464E-3*WINDST(L)*(SVPW-VPA(L))
& /PATMT(L)
ENDIF
EVAPSW(L)=EVAPT(L)*DXYP(L)
RIFTR(L)=0.
C
C CALCULATE DEPTH OF ACTIVE GROUNDWATER ELEV BELOW SURFACE
C
DTAGW=BELV(L)-AGWELV(L)
IF(DTAGW.GT.0.0)THEN
C
C INFLITRATION CAN OCCUR, CALCULATE LIMITING RATE TO BRING
C GW ELEV TO SOIL SURFACE
C
RIFTRL=RNPOR*DTAGW*DELTI
C
C SET RIFTRL TO MIN OF LIMITING RATE OR ACTUAL RATE
C
RIFTRL=MIN(RIFTRM,RIFTRL)
C
C ESTIMATE RATE BASED ON AVAILABLE SURFACE WATER
C
RAVAIL=(H1P(L)-HDRY)*DELTI-EVAPT(L)
C
C SET RIFTRL TO MIN OF AVAILABLE RATE OR LIMITING RATE
C
RIFTRL=MIN(RAVAIL,RIFTRL)
C
C CONVERT TO VOLUME FLOW UNITS
C
RIFTR(L)=RIFTRL*DXYP(L)
ENDIF
C
C ADJUST VOLUME OUTFLOWS OF WET CELLS
C
IF(QSUME(L).LT.0.0)THEN
QSUMIET=RIFTR(L)+EVAPSW(L)
QEAVAIL=DXYP(L)*(H1P(L)-HDRY)*DELTI-QSUMIET
QEAVAIL=MAX(QEAVAIL,0.0)
QEAVAIL=-QEAVAIL
QSUMTMP(L)=MAX(QSUME(L),QEAVAIL)
ELSE
QSUMTMP(L)=QSUME(L)
ENDIF
ELSE
RIFTR(L)=0.
EVAPSW(L)=0.
QSUMTMP(L)=MAX(QSUME(L),0.0)
ENDIF
ENDDO
DO L=2,LA
DIFQVOL=QSUME(L)-QSUMTMP(L)
DO K=1,KC
QSUM(L,K)=QSUM(L,K)-DIFQVOL*DZC(K)
ENDDO
QSUME(L)=QSUMTMP(L)
ENDDO
ENDIF
C
C ** ADVANCE EXTERNAL VARIABLES
C
DO L=2,LA
UHDY1E(L)=UHDYE(L)
VHDX1E(L)=VHDXE(L)
P1(L)=P(L)
H1U(L)=HU(L)
H1V(L)=HV(L)
H1UI(L)=HUI(L)
H1VI(L)=HVI(L)
H2P(L)=H1P(L)
H1P(L)=HP(L)
ENDDO
C
IF(ISGWIE.GE.1)THEN
DO L=2,LA
AGWELV2(L)=AGWELV1(L)
AGWELV1(L)=AGWELV(L)
ENDDO
ENDIF
C
C ** SET OLD TIME LEVEL TERMS IN CONTINUITY EQUATION FOR NON-BOUNDARY POINTS
C ** HRU=HMU*DYU/DXU & HRV=HMV*DXV/DYV
C ** DXYIP=1/(DXP*DYP)
C
C *** DSLLC BEGIN BLOCK
C1=0.5*G
DO L=2,LA
LN=LNC(L)
FP(L)=DELTI*DXYP(L)*P(L)-C1*(UHDYE(L+1)-UHDYE(L)
& +VHDXE(LN )-VHDXE(L))
ENDDO
C
C ** SET NEW TIME LEVEL TERMS IN CONTINUITY EQUATION INCLUDING
C ** HOST-GUEST CHANNEL INTERACTION FOR NON BOUNDARY POINTS
C
DO L=2,LA
LN=LNC(L)
! *** THE SUB & SVB SWITCHES ALREADY ACCOUNTED FOR
FP(L)=FP(L)-C1*(FUHDYE(L+1)-FUHDYE(L)
& +FVHDXE(LN )-FVHDXE(L)
& -2.0*QSUME(L) )
ENDDO
C
IF(ISGWIE.GE.1)THEN
DO L=2,LA
FP(L)=FP(L)-G*SPB(L)*(RIFTR(L)+EVAPSW(L))
ENDDO
ENDIF
C
C1=-0.5*DELTD2*G
DO L=2,LA
LN=LNC(L)
CN(L)=C1*SVB(LN )*HRVO(LN )*RCY(LN )*HV(LN )
CS(L)=C1*SVB(L )*HRVO(L )*RCY(L )*HV(L )
CE(L)=C1*SUB(L+1)*HRUO(L+1)*RCX(L+1)*HU(L+1)
CW(L)=C1*SUB(L )*HRUO(L )*RCX(L )*HU(L )
ENDDO
C
C *** APPLY THE OPEN BOUNDARY CONDITIONS
C
IF(NBCSOP.GT.0) CALL SETOPENBC(DELT,DELTD2,DELTI,HU,HV)
C
! *** SET THE CENTER
DO L=2,LA
CC(L)=DELTI*DXYP(L)-CS(L)-CW(L)-CE(L)-CN(L)
ENDDO
C
! *** SCALE COEFFICIENTS IN EXTERNAL MODEL LINEAR EQUATION SYSTEM
CCMNM=1.E+18
DO L=2,LA
CCMNM=MIN(CCMNM,CC(L))
FPTMP(L)=FP(L)
ENDDO
CCMNMI=1./CCMNM
C
C *** APPLY THE OPEN BOUNDARY CONDITIONS FOR ADJACENT CELLS
C
IF(NBCSOP.GT.0) CALL SETOPENBC2
C
IF(ISDSOLV.GE.1.AND.DEBUG)THEN
OPEN(1,FILE='FP.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),FP(L),FUHDYE(L),FUHDYE(L+1),
& FVHDXE(L),FVHDXE(LNC(L)),QSUME(L),RIFTR(L),EVAPSW(L)
ENDDO
CLOSE(1)
IF(N.EQ.1)THEN
OPEN(1,FILE='FP.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),FP(L),FUHDYE(L),FUHDYE(L+1),
& FVHDXE(L),FVHDXE(LNC(L)),QSUME(L),RIFTR(L),EVAPSW(L)
ENDDO
CLOSE(1)
ENDIF
IF(N.EQ.2)THEN
OPEN(1,FILE='FP2.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),FP(L),FUHDYE(L),FUHDYE(L+1),
& FVHDXE(L),FVHDXE(LNC(L)),QSUME(L),RIFTR(L),EVAPSW(L)
ENDDO
CLOSE(1)
ENDIF
ENDIF
C
CC(1)=1.
CC(LC)=1.
C
C ** SCALE BY MINIMUM DIAGONAL
C
IF(IRVEC.EQ.9.OR.IRVEC.EQ.9999)THEN
DO L=2,LA
CCS(L)=CS(L)*CCMNMI
CCW(L)=CW(L)*CCMNMI
CCE(L)=CE(L)*CCMNMI
CCN(L)=CN(L)*CCMNMI
CCC(L)=CC(L)*CCMNMI
FPTMP(L)=FPTMP(L)*CCMNMI
CCCI(L)=1./CCC(L)
ENDDO
ENDIF
C
C ** SCALE TO NORMAL FORM
C
IF(IRVEC.EQ.99)THEN
DO L=2,LA
CCS(L)=CS(L)/SQRT( CC(L)*CC(LSC(L)) )
CCW(L)=CW(L)/SQRT( CC(L)*CC(L-1 ) )
CCE(L)=CE(L)/SQRT( CC(L)*CC(L+1 ) )
CCN(L)=CN(L)/SQRT( CC(L)*CC(LNC(L)) )
CCC(L)=1.
FPTMP(L)=FPTMP(L)/SQRT( CC(L) )
P(L)=P(L)*SQRT( CC(L) )
CCCI(L)=1.
ENDDO
ENDIF
C
C *** IRVEC = 9 CALLS PRECONDITIONED CONJUGATE GRADIENT SOLVER
C *** IRVEC = 9999 CALLS A NEW RED-BLACK ORDERED SOR
C
C PMC IF(ISAVEC.EQ.0) THEN
IF(IRVEC.EQ.9999)THEN
CALL RELAX2T
ELSE
CALL CONGRAD(ISTL)
ENDIF
C PMC ELSE
C PMC CALL VCONGRAD (ISTL)
C PMC END IF
C
IF(IRVEC.EQ.99)THEN
DO L=2,LA
P(L)=P(L)/SQRT( CC(L) )
ENDDO
ENDIF
C
IF(ISDSOLV.GE.1.AND.DEBUG)THEN
OPEN(1,FILE='EQCOEF.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
SURFTMP=GI*P(L)
WRITE(1,1001)IL(L),JL(L),CS(L),CW(L),CC(L),CE(L),CN(L),
& FP(L),SURFTMP
ENDDO
CLOSE(1)
IF(N.EQ.1)THEN
OPEN(1,FILE='EQCOEF1.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
SURFTMP=GI*P(L)
WRITE(1,1001)IL(L),JL(L),CS(L),CW(L),CC(L),CE(L),CN(L),
& FP(L),SURFTMP
ENDDO
CLOSE(1)
ENDIF
IF(N.EQ.2)THEN
OPEN(1,FILE='EQCOEF2.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
SURFTMP=GI*P(L)
WRITE(1,1001)IL(L),JL(L),CS(L),CW(L),CC(L),CE(L),CN(L),
& FP(L),SURFTMP
ENDDO
CLOSE(1)
ENDIF
C
OPEN(1,FILE='EQTERM.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),SUB(L),SVB(L),HRUO(L),
& HRVO(L),HU(L),HV(L)
ENDDO
CLOSE(1)
IF(N.EQ.1)THEN
OPEN(1,FILE='EQTERM1.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),SUB(L),SVB(L),HRUO(L),
& HRVO(L),HU(L),HV(L)
ENDDO
CLOSE(1)
ENDIF
IF(N.EQ.2)THEN
OPEN(1,FILE='EQTERM2.OUT',POSITION='APPEND',STATUS='UNKNOWN')
WRITE(1,1001)N,ISTL
DO L=2,LA
WRITE(1,1001)IL(L),JL(L),SUB(L),SVB(L),HRUO(L),
& HRVO(L),HU(L),HV(L)
ENDDO
CLOSE(1)
ENDIF
ENDIF
1001 FORMAT(2I5,10(1X,E12.4))
1002 FORMAT(3I4,10(1X,E9.2))
C
C ** CALCULATE UHEX AND VHEX AND TOTAL DEPTHS AT TIME LEVEL (N+1)
C ** HRU=SUB*DYU/DXU & HRV=SVB*DXV/DYV
C
DO L=2,LA
LS=LSC(L)
UHDYE(L)=SUB(L)*( FUHDYE(L)
& -DELTD2*HRUO(L)*RCX(L)*HU(L)*(P(L)-P(L-1)) )
VHDXE(L)=SVB(L)*( FVHDXE(L)
& -DELTD2*HRVO(L)*RCY(L)*HV(L)*(P(L)-P(LS )) )
ENDDO
DO L=2,LA
UHE(L)=UHDYE(L)*DYIU(L)
VHE(L)=VHDXE(L)*DXIV(L)
ENDDO
C
C ** CALCULATE REVISED CELL DEPTHS BASED ON NEW HORIZONTAL
C ** TRANSPORTS AT (N+1)
C
DO L=2,LA
LN=LNC(L)
HP(L)=H1P(L)+DELT*DXYIP(L)*(QSUME(L)
& -0.5*(UHDYE(L+1)+UHDY1E(L+1)-UHDYE(L)-UHDY1E(L)
& +VHDXE(LN) +VHDX1E(LN )-VHDXE(L)-VHDX1E(L)))
ENDDO
C
IF(ISGWIE.GE.1)THEN
DO L=2,LA
HP(L)=HP(L)-DELT*DXYIP(L)*(RIFTR(L)+EVAPSW(L))
ENDDO
ENDIF
C
! *** APPLY OPEN BOUNDARYS
DO LL=1,NBCSOP
L=LOBCS(LL)
HP(L)=GI*P(L)-BELV(L)
ENDDO
C *** PMC TESTING
if(.FALSE.)then
DO L=2,LA
IF(SPB(L).GT.0.5)THEN
PMC=SPB(L)*(GI*P(L)-BELV(L))
IF(ABS(PMC-HP(L)).GT.1.E-6)THEN
IPMC=0
ENDIF
ENDIF
ENDDO
endif
C
C ** PERFORM FINAL UPDATES OF P,HU, AND HV
C
DO L=2,LA
P(L)=G*(HP(L)+BELV(L))
ENDDO
DO L=2,LA
LS=LSC(L)
HU(L)=0.5*(DXYP(L)*HP(L)+DXYP(L-1)*HP(L-1))*DXYIU(L)
HV(L)=0.5*(DXYP(L)*HP(L)+DXYP(LS )*HP(LS ))*DXYIV(L)
ENDDO
DO L=2,LA
HPI(L)=1./HP(L)
HUI(L)=1./HU(L)
HVI(L)=1./HV(L)
ENDDO
C
C ** PERFORM UPDATE ON GROUNDWATER ELEVATION
C
IF(ISGWIE.GE.1)THEN
DO L=2,LA
QSUM(L,KC)=QSUM(L,KC)-EVAPSW(L)
QSUM(L,1 )=QSUM(L,1 )-RIFTR(L)
ENDDO
C
C INFILTRATION STEP
C
RNPORI=1./RNPOR
IF(ISTL.EQ.3)THEN
DO L=2,LA
AGWELV(L)=AGWELV2(L)+RNPORI*DELT*DXYIP(L)*RIFTR(L)
ENDDO
ELSE
DO L=2,LA
AGWELV(L)=AGWELV1(L)+RNPORI*DELT*DXYIP(L)*RIFTR(L)
ENDDO
ENDIF
DO L=2,LA
AGWELV(L)=MIN(AGWELV(L),BELV(L))
ENDDO
C
C ET STEP
C
DO L=2,LA
IF(EVAPCVT.LT.0.)THEN
SVPW=(10.**((0.7859+0.03477*TEM(L,KC))/
& (1.+0.00412*TEM(L,KC))))
EVAPT(L)=CLEVAP(L)*0.7464E-3*WINDST(L)*(SVPW-VPA(L))/PATMT(L)
ENDIF
ETGWTMP=EVAPT(L)-EVAPSW(L)*DXYIP(L)
ETGWTMP=MAX(ETGWTMP,0.0)
ETGWAVL=RNPOR*DELTI*(AGWELV(L)-BELAGW(L))
ETGWAVL=MAX(ETGWAVL,0.0)
ETGWTMP=MIN(ETGWTMP,ETGWAVL)
EVAPGW(L)=ETGWTMP*DXYP(L)
ENDDO
DO L=2,LA
AGWELV(L)=AGWELV(L)-RNPORI*DELT*DXYIP(L)*EVAPGW(L)
ENDDO
DO L=2,LA
AGWELV(L)=MAX(AGWELV(L),BELAGW(L))
ENDDO
ENDIF
C
C ** CHECK FOR NEGATIVE DEPTHS
C
ISTLX=ISTL
IF(ISNEGH.GE.1)CALL NEGDEP(QCHANUT,QCHANVT,ISTLX)
6910 FORMAT(' DRYING AT N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
6911 FORMAT(' DRY W FACE N,I,J =',I10,2I6,' HU,H,H1 =',3(2X,E12.4))
6912 FORMAT(' DRY E FACE N,I,J =',I10,2I6,' HU,H,H1 =',3(2X,E12.4))
6913 FORMAT(' DRY S FACE N,I,J =',I10,2I6,' HV,H,H1 =',3(2X,E12.4))
6914 FORMAT(' DRY N FACE N,I,J =',I10,2I6,' HV,H,H1 =',3(2X,E12.4))
6920 FORMAT(' WETTING AT N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
6921 FORMAT(' WET S FACE N,I,J =',I10,2I6,' HV,H,H1 =',3(2X,E12.4))
6922 FORMAT(' WET W FACE N,I,J =',I10,2I6,' HU,H,H1 =',3(2X,E12.4))
6923 FORMAT(' WET E FACE N,I,J =',I10,2I6,' HU,H,H1 =',3(2X,E12.4))
6924 FORMAT(' WET N FACE N,I,J =',I10,2I6,' HV,H,H1 =',3(2X,E12.4))
6930 FORMAT(' WET BY VOL N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
6940 FORMAT(' RESOLVE, N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
6941 FORMAT(' RESOLVE, N,I,J =',I10,2I6,' HUE,HP,H1P ='
& ,3(2X,E12.4))
6942 FORMAT(' RESOLVE, N,I,J =',I10,2I6,' HUW,HP,H1P ='
& ,3(2X,E12.4))
6943 FORMAT(' RESOLVE, N,I,J =',I10,2I6,' HVS,HP,H1P ='
& ,3(2X,E12.4))
6944 FORMAT(' RESOLVE, N,I,J =',I10,2I6,' HVN,HP,H1P ='
& ,3(2X,E12.4))
6945 FORMAT(' RESOLVE NEG, N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
6950 FORMAT(' RESOLVE, NEG DEP N,I,J =',I10,2I6,' HP,H1P,H2P ='
& ,3(2X,E12.4))
C
C ** CALCULATE THE EXTERNAL DIVERGENCE
C
IF(ISDIVEX.EQ.1)THEN
DIVEXMX=0.
DIVEXMN=1000000.
DO L=2,LA
IF(SPB(L).NE.0)THEN
LN=LNC(L)
DIVEX=SPB(L)*(DXYP(L)*(HP(L)-H1P(L))*DELTI
& +0.5*(UHDYE(L+1)+UHDY1E(L+1)-UHDYE(L)-UHDY1E(L)
& +VHDXE(LN)+VHDX1E(LN)-VHDXE(L)-VHDX1E(L))-QSUME(L)
& +RIFTR(L)+EVAPSW(L))
IF(DIVEX.GT.DIVEXMX)THEN
DIVEXMX=DIVEX
LMAX=L
ENDIF
IF(DIVEX.LT.DIVEXMN)THEN
DIVEXMN=DIVEX
LMIN=L
ENDIF
ENDIF
ENDDO
IMAX=IL(LMAX)
JMAX=JL(LMAX)
IMIN=IL(LMIN)
JMIN=JL(LMIN)
WRITE(6,6628)DIVEXMX,IMAX,JMAX
WRITE(6,6629)DIVEXMN,IMIN,JMIN
ENDIF
566 FORMAT(' I=',I5,3X,'J=',I5,3X,'HP=',F12.4)
6628 FORMAT(' DIVEXMX=',E13.5,5X,2I10)
6629 FORMAT(' DIVEXMN=',E13.5,5X,2I10)
C
C ** UPDATE ZERO DIMENSION VOLUME BALANCE
C
C IF(ISDRY.GE.1.AND.ISTL.EQ.3)THEN
IF(ISDRY.GE.1)THEN
VOLADD=0.
DO L=2,LA
IF(SPB(L).NE.0)THEN
VOLADD=VOLADD+QSUME(L)-RIFTR(L)-EVAPSW(L)
ENDIF
ENDDO
VOLADD=VOLADD*DT
VOLZERD=VOLZERD+VOLADD
VETZERD=VETZERD+VOLADD+DT*EVAPSW(L)
ENDIF
5303 FORMAT(2X,F10.4,2X,F10.5,3(2X,E13.5))
C
!CALL NOW_CHECK ! PMC TESTING
C
RETURN
END