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C $Header: /u/gcmpack/MITgcm/pkg/fizhi/fizhi_lsm.F,v 1.8 2010/03/16 00:19:33 jmc Exp $ |
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C $Name: $ |
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|
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#include "FIZHI_OPTIONS.h" |
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SUBROUTINE TILE ( |
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I NCH, DTSTEP, ITYP, TRAINL,TRAINC, TSNOW, UM, |
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I ETURB, DEDQA, DEDTC, HSTURB, DHSDQA, DHSDTC, |
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I TM, QM, CD, SUNANG, PARDIR, PARDIF, |
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I SWNET, HLWDWN, PSUR, ZLAI, GREEN, Z2, |
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I SQSCAT, RSOIL1, RSOIL2, RDC, U2FAC, |
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I QSATTC, DQSDTC, ALWRAD, BLWRAD, |
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U TC, TD, QA, SWET1, SWET2, SWET3, CAPAC, SNOW, |
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O EVAP, SHFLUX, RUNOFF, BOMB, |
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O EINT, ESOI, EVEG, ESNO, SMELT, HLATN, |
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O HLWUP,GDRAIN,RUNSRF,FWSOIL, |
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O STRDG1, STRDG2, STRDG3, STRDG4, |
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O STRDG5, STRDG6, STRDG7, STRDG8, STRDG9 |
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& ) |
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|
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C SCCS VERSION @(#)lsm.f 1.2 11/3/92 |
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|
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C**** |
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C**** This subroutine computes the outgoing fluxes of sensible and |
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C**** latent heat from the land surface and updates the surface prognostic |
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C**** variables. |
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C**** |
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IMPLICIT NONE |
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C |
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C**** |
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#include "sibber.h" |
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C**** |
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INTEGER NCH |
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INTEGER ITYP(NCH) |
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_RL DTSTEP, TRAINL(NCH), TRAINC(NCH), TSNOW(NCH), UM(NCH), |
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& ETURB(NCH), DEDQA(NCH), HSTURB(NCH), DHSDTC(NCH), |
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& TM (NCH), CD(NCH), SUNANG(NCH), DHSDQA(NCH), |
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& QM (NCH), PARDIR(NCH), PARDIF(NCH), SWNET(NCH), |
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& HLWDWN(NCH), PSUR(NCH), ZLAI(NCH), GREEN(NCH), |
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& Z2(NCH), SQSCAT(NCH), DEDTC(NCH) |
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_RL RSOIL1(NCH), RSOIL2(NCH), RDC(NCH), U2FAC(NCH), |
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& QSATTC(NCH), DQSDTC(NCH), ALWRAD(NCH), BLWRAD(NCH), |
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& TC(NCH), TD(NCH), QA(NCH), BOMB(NCH), |
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& SWET1(NCH), SWET2(NCH), SWET3(NCH), CAPAC(NCH), |
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& SNOW(NCH), EVAP(NCH), SHFLUX(NCH), RUNOFF(NCH) |
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_RL EINT(NCH), ESOI(NCH), EVEG(NCH), ESNO(NCH), |
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& STRDG1(NCH), STRDG2(NCH), STRDG3(NCH), STRDG4(NCH), |
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& STRDG5(NCH), STRDG6(NCH), STRDG7(NCH), STRDG8(NCH), |
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& STRDG9(NCH), |
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& SMELT(NCH), HLATN(NCH), HLWUP(NCH), GDRAIN(NCH), |
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& RUNSRF(NCH), FWSOIL(NCH) |
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C**** |
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INTEGER ChNo |
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_RL SWET(nch,NLAY), VGPSAT(NTYPS), VGCSAT (NTYPS), |
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& VGZDEP(NLAY,NTYPS), VGSLOP(NTYPS), DELTC, |
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& DELEA, VGPH1(NTYPS), VGPH2(NTYPS), |
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& VGRPLN(NTYPS), CSOIL0(NTYPS), WSOI12, |
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& VGBEE(NTYPS), DELZ12(NTYPS), |
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& DELZ23(NTYPS) |
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C**** |
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|
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_RL PHLAY(nch,NLAY), AKLAY(nch,NLAY), SWET12(nch), |
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& CSOIL(nch), |
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& RCUN(nch), VPDSTR(nch), ESATTX(nch), |
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& VPDSTX(nch), VGBEEX(nch) |
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_RL EMAXRT(nch), VGWMAX(NLAY,NTYPS), FTEMP(nch), |
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& PHR(nch), SOILCO(nch), RC(nch), |
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& EAX(nch), TX(nch), RCX(nch), |
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& DRCDTC(nch), SATCAP(nch), PAR(nch), |
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& PDIR(nch), DUMMY(nch) |
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_RL FTEMPX(nch), DRCDEA(nch), VGPSAX(nch), VGCSAX(nch), |
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& VGZDEX(NLAY,nch), VGSLOX(nch), VGPH1X(nch), |
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& VGPH2X(nch), VGRPLX(nch) |
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_RL DEDEA(nch), DHSDEA(nch), EM(nch), ESATTC(nch), |
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& DESDTC(nch), EA(nch), RA(nch), ALHX(nch), |
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& WETEQ1(nch), WETEQ2(nch), |
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& RX1(nch), RX2(nch), SNWFRC(nch), POTFRC(nch), |
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& ESNFRC(nch), EIRFRC(nch), FCAN(nch), EPFRC, |
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& DEFCIT, EADJST, RTBS |
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_RL cmpbug |
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|
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C**** |
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DATA VGWMAX /8.4, 621.6, 840.0, |
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2 8.4, 621.6, 840.0, |
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3 8.4, 621.6, 840.0, |
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4 8.4, 197.4, 420.0, |
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5 8.704, 204.5, 435.2, |
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6 8.4, 71.4, 420.0, |
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7 4.000, 4.000, 130.56, |
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8 4.000, 4.000, 130.56, |
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9 8.704, 73.984, 130.56, |
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1 4.000, 4.000, 130.56 |
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& / |
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DATA VGBEE / 4., 4., 4., 4., 1.69, 4., |
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& 4., 1.69, 1.69, 1.69/ |
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C DATA VGBEE / 7., 7., 7., 7., 1.69, 7., |
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C & 7., 1.69, 1.69, 1.69/ |
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c DATA VGBEE / 4., 4., 4., 4., 0.95, 4., |
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c & 4., 0.95, 0.95, 0.95/ |
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C DATA VGBEE /7, 7, 7, 7, 2, 7, 7, 4, 2, 4/ |
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DATA VGPSAT/ -0.281, -0.281, -0.281, -0.281, |
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5 -0.073, -0.281, -0.281, -0.073, |
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9 -0.073 , -0.073/ |
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C DATA VGPSAT/ -0.086, -0.086, -0.086, -0.086, |
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C 5 -0.073, -0.086, -0.086, -0.073, |
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C 9 -0.073 , -0.073/ |
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c DATA VGPSAT/ -0.281, -0.281, -0.281, -0.281, |
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c 5 -0.014, -0.281, -0.281, -0.014, |
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c 9 -0.014 , -0.014/ |
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c DATA VGCSAT / 0.00002, 0.00002, 0.00002, 0.00002, |
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c 5 0.0000583, 0.00002, 0.00002, 0.0000583, |
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c 9 0.0000583, 0.0000583 |
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c & / |
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DATA VGCSAT / 0.0000012, 0.0000012, 0.0000012, 0.0000012, |
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5 0.0000583, 0.0000012, 0.0000012, 0.0000583, |
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9 0.0000583, 0.0000583 |
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& / |
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C**** - - - - - - - - |
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C**** THE FOLLOWING 3 VARIABLES MUST MAINTAIN CONSISTENT VALUES. ZDEP12(N) = |
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C**** (VGZDEP(1,N)+VGZDEP(2,N))/2. ; SIMILARLY FOR ZDEP23(N). |
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C**** |
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DATA VGZDEP /.02, 1.48, 2.00, |
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2 .02, 1.48, 2.00, |
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3 .02, 1.48, 2.00, |
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4 .02, .47, 1.00, |
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5 .02, .47, 1.00, |
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6 .02, .17, 1.00, |
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7 .0092, .0092, .30, |
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8 .0092, .0092, .30, |
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9 .02, .17, .30, |
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1 .0092, .0092, .30 |
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& / |
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DATA DELZ12 / 0.75, 0.75, 0.75, 0.245, 0.245, 0.095, 0.0092, |
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8 0.0092, 0.095, 0.0092 / |
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DATA DELZ23 / 1.74, 1.74, 1.74, 0.735, 0.735, 0.585, 0.155, |
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8 0.155, 0.235, 0.155 / |
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C**** - - - - - - - - |
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DATA VGSLOP / .1736, .1736, .1736, .1736, |
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5 1.000, .1736, .1736, 1.000, |
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& 1.000 , 1.000 / |
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c DATA VGSLOP / .1736, .1736, .1736, .1736, |
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c 5 .0872, .1736, .1736, .0872, |
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c & .0872 , .0872 / |
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c DATA VGSLOP / 1., 1., 1., 1., 1., 1., 1., 1., 1.,1./ |
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DATA VGPH1 / -100., -190., -200., -120., |
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5 -200., -200., -200., -10., |
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9 -10., -10. / |
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DATA VGPH2 / -500., -250., -250., -230., |
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5 -400., -400., -250., -100., |
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9 -100., -100. / |
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DATA VGRPLN /0.245E+09, 0.245E+09, 0.245E+09, 0.250E+09, |
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5 0.250E+09, 0.250E+09, 0.245E+09, 0.1E+09, |
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9 0.1E+09, 0.100E+09 / |
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C**** |
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DATA DELTC /0.01/, DELEA /0.001/ |
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|
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c Note: SNWMID & CSOIL0 parameters modified from (Koster/Suarez) |
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c to obtain improved albedo, radswg, and annual/diurnal cycle (L.Takacs 2/17/00) |
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c ------------------------------------------------------------------------------------ |
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DATA CSOIL0 /175000.,175000.,175000.,175000.,175000., |
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. 175000.,175000.,120000.,175000., 70000./ |
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#include "snwmid.h" |
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|
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C**** |
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C**** --------------------------------------------------------------------- |
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C**** |
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CFPP$ EXPAND (TMPFAC, RCANOP, SOIL, WUPDAT, SMFAC) |
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C**** |
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C**** Expand data as specified by ITYP into arrays of size NCH. |
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C**** |
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DO 50 ChNo = 1, NCH |
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BOMB(CHNO) = 0. |
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VGBEEX(ChNo) = VGBEE(ITYP(ChNo)) |
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VGPSAX(ChNo) = VGPSAT(ITYP(ChNo)) |
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VGCSAX(ChNo) = VGCSAT(ITYP(ChNo)) |
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VGZDEX(SFCLY ,ChNo) = VGZDEP(SFCLY ,ITYP(ChNo)) |
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VGZDEX(ROOTLY,ChNo) = VGZDEP(ROOTLY,ITYP(ChNo)) |
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VGZDEX(RECHLY,ChNo) = VGZDEP(RECHLY,ITYP(ChNo)) |
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VGSLOX(ChNo) = VGSLOP(ITYP(ChNo)) |
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VGPH1X(ChNo) = VGPH1(ITYP(ChNo)) |
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VGPH2X(ChNo) = VGPH2(ITYP(ChNo)) |
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VGRPLX(ChNo) = VGRPLN(ITYP(ChNo)) |
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50 CONTINUE |
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|
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C**** |
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C**** Pre-process input arrays as necessary: |
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|
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DO 100 ChNo = 1, NCH |
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|
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DEDQA(CHNO) = MAX( DEDQA(CHNO), 500. _d 0/ALHE ) |
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DEDTC(CHNO) = MAX( DEDTC(CHNO), 0. _d 0) |
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DHSDQA(CHNO) = MAX( DHSDQA(CHNO), 0. _d 0) |
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DHSDTC(CHNO) = MAX( DHSDTC(CHNO), -10. _d 0) |
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|
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EM(CHNO) = QM(CHNO) * PSUR(CHNO) / EPSILON |
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EA(CHNO) = QA(CHNO) * PSUR(CHNO) / EPSILON |
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ESATTC(CHNO) = QSATTC(CHNO) * PSUR(CHNO) / EPSILON |
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DESDTC(CHNO) = DQSDTC(CHNO) * PSUR(CHNO) / EPSILON |
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C DEDEA(CHNO) = DEDQA(CHNO) * EPSILON / ( PSUR(CHNO) * ALHX(CHNO) ) |
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DEDEA(CHNO) = DEDQA(CHNO) * EPSILON / PSUR(CHNO) |
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DHSDEA(CHNO) = DHSDQA(CHNO) * EPSILON / PSUR(CHNO) |
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C DEDTC(CHNO) = DEDTC(CHNO) / ALHX(CHNO) |
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C ETURB(CHNO) = ETURB(CHNO) / ALHX(CHNO) |
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PAR(CHNO) = (PARDIR(CHNO) + PARDIF(CHNO) + 1.E-20) |
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PDIR(CHNO) = PARDIR(CHNO) / PAR(CHNO) |
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RA(CHNO) = ONE / ( CD(CHNO) * UM(CHNO) ) |
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SATCAP(ChNo) = 0.1 * ZLAI(ChNo) |
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CSOIL(CHNO) = CSOIL0(ITYP(ChNo)) |
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SWET(ChNo,SFCLY ) = max( min(SWET1(ChNo),1. _d 0), 0. _d 0) |
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SWET(ChNo,ROOTLY) = max( min(SWET2(ChNo),1. _d 0), 0. _d 0) |
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SWET(ChNo,RECHLY) = max( min(SWET3(ChNo),1. _d 0), 0. _d 0) |
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CAPAC(CHNO) = max( min(CAPAC(ChNo),SATCAP(CHNO)), 0. _d 0) |
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C**** |
| 213 |
|
| 214 |
SNWFRC(CHNO) = SNOW(CHNO) / ( SNOW(CHNO) + SNWMID(ITYP(CHNO)) ) |
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FCAN(CHNO) = MIN( 1. _d 0, MAX(0. _d 0,CAPAC(ChNo)/SATCAP(ChNo)) ) |
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POTFRC(CHNO)=1.-(1.-SNWFRC(CHNO))*(1.-FCAN(CHNO)) |
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|
| 218 |
|
| 219 |
WSOI12=SWET(ChNo,SFCLY ) * VGWMAX(SFCLY ,ITYP(ChNo)) + |
| 220 |
& SWET(ChNo,ROOTLY) * VGWMAX(ROOTLY,ITYP(ChNo)) |
| 221 |
SWET12(ChNo) = WSOI12 / |
| 222 |
& (VGWMAX(SFCLY,ITYP(ChNo)) + VGWMAX(ROOTLY,ITYP(ChNo))) |
| 223 |
|
| 224 |
EMAXRT(CHNO) = ( SNOW(CHNO) + CAPAC(CHNO) + WSOI12 ) / DTSTEP |
| 225 |
|
| 226 |
C**** |
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RUNOFF(CHNO) = 0. |
| 228 |
RUNSRF(CHNO) = 0. |
| 229 |
C**** (SMELT is zeroed in FLUXES) |
| 230 |
C SMELT(CHNO) = 0. |
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FWSOIL(CHNO) = 0. |
| 232 |
100 CONTINUE |
| 233 |
|
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C**** |
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C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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C**** STEP 1: COMPUTE EFFECTIVE RESISTANCE RC FOR ENERGY BALANCE. |
| 237 |
C**** (RCUNST computes the unstressed resistance, |
| 238 |
C**** VPDFAC computes the vapor pressure deficit stress term, |
| 239 |
C**** TMPFAC computes the temperature stress term, |
| 240 |
C**** SOIL computes soil moisture potentials and conds., |
| 241 |
C**** SMFAC computes rc given a leaf water potential stress, |
| 242 |
C**** RSURFP computes rc given a parallel resist. from the |
| 243 |
C**** surface, |
| 244 |
C**** RCANOP computes rc corrected for snow and interception.) |
| 245 |
C**** |
| 246 |
|
| 247 |
CALL RCUNST ( |
| 248 |
I NCH, ITYP, SUNANG, SQSCAT, PDIR, |
| 249 |
I PAR, ZLAI, GREEN, |
| 250 |
O RCUN |
| 251 |
& ) |
| 252 |
|
| 253 |
CALL VPDFAC ( |
| 254 |
I NCH, ITYP, ESATTC, EA, |
| 255 |
O VPDSTR |
| 256 |
& ) |
| 257 |
|
| 258 |
CALL TMPFAC ( |
| 259 |
I NCH, ITYP, TC, |
| 260 |
O FTEMP |
| 261 |
& ) |
| 262 |
|
| 263 |
CALL SOIL ( |
| 264 |
I NCH, ITYP, SWET12, VGBEEX, VGPSAX, VGCSAX, DELZ12, |
| 265 |
O PHR, SOILCO, DUMMY |
| 266 |
& ) |
| 267 |
|
| 268 |
cmpbug=0. |
| 269 |
|
| 270 |
CALL SMFAC ( |
| 271 |
I NCH, ITYP, ESATTC, EA, PHR, SOILCO, RCUN, |
| 272 |
I VPDSTR, FTEMP, TC, PSUR, Z2, RSOIL1, RSOIL2, |
| 273 |
I VGPH1X, VGPH2X, VGRPLX, |
| 274 |
O RC |
| 275 |
& ) |
| 276 |
|
| 277 |
CALL RSURFP ( |
| 278 |
I NCH, UM, U2FAC, Z2, RDC, SWET(1,SFCLY), |
| 279 |
I ESATTC, EA, |
| 280 |
U RC, |
| 281 |
O RX1, RX2 |
| 282 |
& ) |
| 283 |
|
| 284 |
CALL RCANOP ( |
| 285 |
I NCH, CAPAC, SNOW, SATCAP, RA, ETURB, SNWFRC, |
| 286 |
I POTFRC, |
| 287 |
U RC |
| 288 |
& ) |
| 289 |
|
| 290 |
C**** |
| 291 |
C**** - - - - - - - - - - - - - - |
| 292 |
C**** |
| 293 |
C**** Compute DRC/DT and DRC/DEA using temperature, v.p. perturbations: |
| 294 |
C**** |
| 295 |
|
| 296 |
DO 120 ChNo = 1, NCH |
| 297 |
TX(ChNo) = TC(ChNo) + DELTC |
| 298 |
ESATTX(ChNo) = ESATTC(ChNo) + DESDTC(CHNO) * DELTC |
| 299 |
EAX(ChNo) = EA(ChNo) + DELEA |
| 300 |
120 CONTINUE |
| 301 |
C**** |
| 302 |
C**** temperature: |
| 303 |
CALL VPDFAC (NCH, ITYP, ESATTX, EA, VPDSTX) |
| 304 |
CALL TMPFAC (NCH, ITYP, TX, FTEMPX) |
| 305 |
CALL SMFAC ( |
| 306 |
I NCH, ITYP, ESATTX, EA, PHR, SOILCO, RCUN, |
| 307 |
I VPDSTX, FTEMPX, TX, PSUR, Z2, RSOIL1, RSOIL2, |
| 308 |
I VGPH1X, VGPH2X, VGRPLX, |
| 309 |
O RCX |
| 310 |
& ) |
| 311 |
CALL RSURFP (NCH, UM, U2FAC, Z2, RDC, SWET(1,SFCLY), |
| 312 |
I ESATTX, EA, |
| 313 |
& RCX, |
| 314 |
O DUMMY,DUMMY |
| 315 |
& ) |
| 316 |
CALL RCANOP (NCH, CAPAC, SNOW, SATCAP, RA, ETURB, SNWFRC, |
| 317 |
& POTFRC, RCX) |
| 318 |
C**** |
| 319 |
DO 125 ChNo = 1, NCH |
| 320 |
DRCDTC(ChNo) = (RCX(ChNo) - RC(ChNo)) / DELTC |
| 321 |
125 CONTINUE |
| 322 |
C**** |
| 323 |
C**** vapor pressure: |
| 324 |
CALL VPDFAC (NCH, ITYP, ESATTC, EAX, VPDSTX) |
| 325 |
CALL SMFAC ( |
| 326 |
I NCH, ITYP, ESATTC, EAX, PHR, SOILCO, RCUN, |
| 327 |
I VPDSTX, FTEMP, TC, PSUR, Z2, RSOIL1, RSOIL2, |
| 328 |
I VGPH1X, VGPH2X, VGRPLX, |
| 329 |
O RCX |
| 330 |
& ) |
| 331 |
CALL RSURFP (NCH, UM, U2FAC, Z2, RDC, SWET(1,SFCLY), |
| 332 |
I ESATTC, EAX, |
| 333 |
& RCX, |
| 334 |
O DUMMY,DUMMY |
| 335 |
& ) |
| 336 |
CALL RCANOP (NCH, CAPAC, SNOW, SATCAP, RA, ETURB, SNWFRC, |
| 337 |
& POTFRC, RCX) |
| 338 |
C**** |
| 339 |
DO 150 ChNo = 1, NCH |
| 340 |
DRCDEA(ChNo) = (RCX(ChNo) - RC(ChNo)) / DELEA |
| 341 |
150 CONTINUE |
| 342 |
C**** |
| 343 |
|
| 344 |
C**** |
| 345 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 346 |
C**** STEP 2: Solve the energy balance at the surface. |
| 347 |
C**** |
| 348 |
C**** |
| 349 |
C**** Determine effective latent heat of vaporization based on |
| 350 |
C**** assumed fractional coverage of snow. This requires the |
| 351 |
C**** determination of the fractions of moisture taken from the various |
| 352 |
C**** reservoirs: |
| 353 |
C**** ESNFRC=fraction of total evap. coming from snow |
| 354 |
C**** EIRFRC=fraction of total evap. coming from interception res. |
| 355 |
|
| 356 |
DO 200 CHNO=1,NCH |
| 357 |
RTBS=RX1(CHNO)*RX2(CHNO)/(RX1(CHNO)+RX2(CHNO)) |
| 358 |
EPFRC=POTFRC(CHNO) * ( RA(CHNO) + RTBS ) / |
| 359 |
& ( RA(CHNO) + POTFRC(CHNO)*RTBS ) |
| 360 |
ESNFRC(CHNO)=EPFRC*SNWFRC(CHNO)/ |
| 361 |
& (SNWFRC(CHNO)+FCAN(CHNO)+1.E-20) |
| 362 |
EIRFRC(CHNO)=EPFRC*FCAN(CHNO)/(SNWFRC(CHNO)+FCAN(CHNO)+1.E-20) |
| 363 |
ALHX(CHNO) = (1.-ESNFRC(CHNO))*ALHE + ESNFRC(CHNO)*ALHS |
| 364 |
200 CONTINUE |
| 365 |
|
| 366 |
CALL FLUXES ( |
| 367 |
I NCH, ITYP, DTSTEP, ESATTC, DESDTC, ALHX, |
| 368 |
I ETURB, DEDEA, DEDTC, HSTURB, DHSDEA, DHSDTC, |
| 369 |
I RC, DRCDEA, DRCDTC, |
| 370 |
I SWNET, HLWDWN, ALWRAD, BLWRAD, ESNFRC, |
| 371 |
I TM, EM, CSOIL, PSUR, EMAXRT, VGWMAX, |
| 372 |
U TC, TD, EA, SWET, SNOW, |
| 373 |
O RUNOFF, EVAP, SHFLUX, SMELT, HLWUP, BOMB,STRDG1, |
| 374 |
O STRDG2, STRDG3, STRDG4, STRDG5, STRDG6, STRDG7, |
| 375 |
O STRDG8, STRDG9 |
| 376 |
& ) |
| 377 |
c**** |
| 378 |
C**** |
| 379 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 380 |
C**** STEP 3: Update the water quantities in the soil and in the |
| 381 |
C**** interception reservoir. |
| 382 |
C**** (WUPDAT reduces moisture contents using calculated |
| 383 |
C**** evap., |
| 384 |
C**** GWATER computes darcian flux of water between soil |
| 385 |
C**** layers.) |
| 386 |
C**** |
| 387 |
|
| 388 |
CALL WUPDAT ( |
| 389 |
I NCH, ITYP, DTSTEP, |
| 390 |
I EVAP, SATCAP, VGWMAX, TC, RA, RC, |
| 391 |
I RX1, RX2,ESNFRC,EIRFRC, |
| 392 |
U CAPAC, SNOW, SWET, RUNOFF, |
| 393 |
O EINT, ESOI, EVEG, ESNO, RUNSRF,FWSOIL |
| 394 |
& ) |
| 395 |
|
| 396 |
C**** |
| 397 |
C**** Correct any energy balance inconsistency. |
| 398 |
C**** |
| 399 |
DO 300 CHNO=1,NCH |
| 400 |
IF(EVAP(CHNO) .GT. 0.) THEN |
| 401 |
EADJST=(ESNO(CHNO)/DTSTEP) - ESNFRC(CHNO)*EVAP(CHNO) |
| 402 |
SHFLUX(CHNO)=SHFLUX(CHNO)-EADJST*(ALHS-ALHE) |
| 403 |
ENDIF |
| 404 |
300 CONTINUE |
| 405 |
|
| 406 |
|
| 407 |
|
| 408 |
CALL SOIL ( |
| 409 |
I NCH, ITYP, SWET (1, SFCLY), VGBEEX, |
| 410 |
I VGPSAX, VGCSAX, DELZ12, |
| 411 |
O PHLAY(1,SFCLY), AKLAY(1,SFCLY), DUMMY |
| 412 |
& ) |
| 413 |
CALL SOIL ( |
| 414 |
I NCH, ITYP, SWET(1,ROOTLY), VGBEEX, |
| 415 |
I VGPSAX, VGCSAX, DELZ12, |
| 416 |
O PHLAY(1,ROOTLY), AKLAY(1,ROOTLY), WETEQ1 |
| 417 |
& ) |
| 418 |
CALL SOIL ( |
| 419 |
I NCH, ITYP, SWET(1,RECHLY), VGBEEX, |
| 420 |
I VGPSAX, VGCSAX, DELZ23, |
| 421 |
O PHLAY(1,RECHLY), AKLAY(1,RECHLY), WETEQ2 |
| 422 |
& ) |
| 423 |
|
| 424 |
CALL GWATER ( |
| 425 |
I NCH, ITYP, VGWMAX, PHLAY, AKLAY, TC, DTSTEP, |
| 426 |
I VGZDEX, VGSLOX, WETEQ1, WETEQ2, |
| 427 |
I VGPSAX, VGCSAX, |
| 428 |
U SWET, RUNOFF, GDRAIN |
| 429 |
& ) |
| 430 |
|
| 431 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 432 |
C**** |
| 433 |
C**** STEP 4: Allow precipitation to fill interception reservoir |
| 434 |
C**** and top soil layer |
| 435 |
C**** |
| 436 |
|
| 437 |
CALL SOIL ( |
| 438 |
I NCH, ITYP, SWET(1,ROOTLY), VGBEEX, |
| 439 |
I VGPSAX, VGCSAX, DELZ12, |
| 440 |
O PHLAY(1,ROOTLY), AKLAY(1,ROOTLY), WETEQ1 |
| 441 |
& ) |
| 442 |
|
| 443 |
CALL INTERC ( |
| 444 |
I NCH, ITYP, DTSTEP, TRAINL, TRAINC, TSNOW, SATCAP, |
| 445 |
I VGWMAX, CSOIL, WETEQ1, |
| 446 |
U TC, CAPAC, SNOW, SWET, RUNOFF, RUNSRF, |
| 447 |
& SMELT, FWSOIL |
| 448 |
& ) |
| 449 |
|
| 450 |
|
| 451 |
C**** |
| 452 |
C**** |
| 453 |
C**** Process data for return to GCM: |
| 454 |
|
| 455 |
DO 2000 ChNo = 1, NCH |
| 456 |
QA(CHNO) = EA(CHNO) * EPSILON / PSUR(CHNO) |
| 457 |
C DEDTC(CHNO) = DEDTC(CHNO) * ALHX(CHNO) |
| 458 |
C ETURB(CHNO) = ETURB(CHNO) * ALHX(CHNO) |
| 459 |
HLATN (CHNO) = EVAP (CHNO) * ALHX(CHNO) |
| 460 |
SWET1(ChNo) = SWET(ChNo,SFCLY) |
| 461 |
SWET2(ChNo) = SWET(ChNo,ROOTLY) |
| 462 |
SWET3(ChNo) = SWET(ChNo,RECHLY) |
| 463 |
|
| 464 |
IF(SWET1(ChNo).LT.1.E-10) SWET1(CHNO) = 0.0 |
| 465 |
IF(SWET2(ChNo).LT.1.E-10) SWET2(CHNO) = 0.0 |
| 466 |
IF(SWET3(ChNo).LT.1.E-10) SWET3(CHNO) = 0.0 |
| 467 |
IF(CAPAC(ChNo).LT.1.E-10) CAPAC(CHNO) = 0.0 |
| 468 |
IF(SNOW (ChNo).LT.1.E-10) SNOW (CHNO) = 0.0 |
| 469 |
IF(RUNOFF(ChNo).LT.1.E-10) RUNOFF(CHNO) = 0.0 |
| 470 |
|
| 471 |
EINT(CHNO) = EINT(CHNO) * ALHE / DTSTEP |
| 472 |
ESOI(CHNO) = ESOI(CHNO) * ALHE / DTSTEP |
| 473 |
EVEG(CHNO) = EVEG(CHNO) * ALHE / DTSTEP |
| 474 |
ESNO(CHNO) = ESNO(CHNO) * ALHS / DTSTEP |
| 475 |
|
| 476 |
DEFCIT = EVAP(CHNO) * ( RC(CHNO) + RA(CHNO) ) |
| 477 |
CCOOMMSTRDG1(CHNO) = DEFCIT / RA(CHNO) |
| 478 |
CCOOMMSTRDG2(CHNO) = DEFCIT / ( RA(CHNO) + RCUN(CHNO) ) |
| 479 |
CCOOMMSTRDG3(CHNO) = DEFCIT / ( RA(CHNO) + RCUN(CHNO)/VPDSTR(CHNO) ) |
| 480 |
CCOOMMSTRDG4(CHNO) = DEFCIT / ( RA(CHNO) + |
| 481 |
CCOOMM RCUN(CHNO)/(VPDSTR(CHNO)*FTEMP(CHNO)) ) |
| 482 |
|
| 483 |
2000 CONTINUE |
| 484 |
C**** |
| 485 |
|
| 486 |
RETURN |
| 487 |
END |
| 488 |
C**** |
| 489 |
C**** [ END CHIP ] |
| 490 |
C**** |
| 491 |
C**** ----------------------------------------------------------------- |
| 492 |
C**** ///////////////////////////////////////////////////////////////// |
| 493 |
C**** ----------------------------------------------------------------- |
| 494 |
C**** |
| 495 |
C**** [ BEGIN INTERC ] |
| 496 |
C**** |
| 497 |
SUBROUTINE INTERC ( |
| 498 |
I NCH, ITYP, DTSTEP, TRAINL, TRAINC, |
| 499 |
I TSNOW, SATCAP, WMAX, CSOIL, WETEQ1, |
| 500 |
U TC, CAPAC, SNOW, SWET1, RUNOFF, RUNSRF, |
| 501 |
U SMELT, FWSOIL |
| 502 |
& ) |
| 503 |
C**** |
| 504 |
C**** This routine uses the precipitation forcing to determine |
| 505 |
C**** changes in interception, snowcover, and soil moisture storage. |
| 506 |
C**** |
| 507 |
C**** Note: In this formulation, rain that falls on frozen ground |
| 508 |
C**** runs-off, rather than freezes. |
| 509 |
C**** |
| 510 |
IMPLICIT NONE |
| 511 |
C**** |
| 512 |
#include "sibber.h" |
| 513 |
C**** |
| 514 |
INTEGER NCH |
| 515 |
INTEGER ITYP(NCH), ChNo |
| 516 |
_RL TRAINL(NCH), TRAINC(NCH), TSNOW(NCH), SATCAP(NCH), |
| 517 |
& WMAX(NLAY,NTYPS), TC(NCH), CSOIL(NCH), CAPAC(NCH), |
| 518 |
& SNOW(NCH), SWET1(NCH), RUNOFF(NCH), SMELT(NCH), |
| 519 |
& RUNSRF(NCH), FWSOIL(NCH), WETEQ1(NCH), WETINT |
| 520 |
_RL DTSTEP, SNOWM, WATADD, CAVAIL, THRUC, WRUNC, WRUNL, |
| 521 |
& TIMFRL, TIMFRC, FWETL, FWETC, THRU1, THRU2, THRUL, XTCORR, |
| 522 |
& WETFRC |
| 523 |
C**** |
| 524 |
C DATA FWET0 /0.30/ |
| 525 |
DATA FWETL /1.00/, FWETC /0.20/, TIMFRL/1.00/, TIMFRC/0.125/ |
| 526 |
C**** |
| 527 |
C**** ------------------------------------------------------------------ |
| 528 |
C**** Loop over chips: |
| 529 |
DO 100 ChNo = 1, NCH |
| 530 |
C**** |
| 531 |
C**** Add to snow cover. Melt snow if necessary. |
| 532 |
SNOW(ChNo) = SNOW(ChNo) + TSNOW(ChNo)*DTSTEP |
| 533 |
SNOWM = 0. |
| 534 |
IF( SNOW(CHNO).GT.0. .AND. TC(CHNO).GT.TF ) THEN |
| 535 |
SNOWM = MIN( SNOW(ChNo), |
| 536 |
& MAX( 0. _d 0, (TC(ChNo)-TF)*CSOIL(ChNo)/ALHM ) ) |
| 537 |
IF( SNOWM .EQ. SNOW(CHNO) ) THEN |
| 538 |
TC(ChNo) = TC(ChNo) - SNOWM * ALHM / CSOIL(ChNo) |
| 539 |
SNOW(CHNO)=0. |
| 540 |
ELSE |
| 541 |
TC(CHNO)=TF |
| 542 |
SNOW(ChNo) = SNOW(ChNo) - SNOWM |
| 543 |
ENDIF |
| 544 |
SMELT(CHNO)=SMELT(CHNO)+SNOWM/DTSTEP |
| 545 |
ENDIF |
| 546 |
C**** |
| 547 |
C**** ======================================================= |
| 548 |
C**** |
| 549 |
C**** Load interception reservoir. STEP 1: Large scale condensation. |
| 550 |
C**** |
| 551 |
C**** Determine XTCORR, the fraction of a storm that falls on a previously |
| 552 |
C**** wet surface due to the time correlation of precipitation position. |
| 553 |
C**** (Time scale TIMFRL for large scale storms set to one for FWETL=1 |
| 554 |
C**** to reflect the effective loss of "position memory" when storm |
| 555 |
C**** covers entire grid square.) |
| 556 |
|
| 557 |
XTCORR= (1.-TIMFRL) * MIN( 1. _d 0,(CAPAC(CHNO)/SATCAP(CHNO))/ |
| 558 |
$ FWETL ) |
| 559 |
|
| 560 |
C**** |
| 561 |
C**** Fill interception reservoir with precipitation. |
| 562 |
C**** THRU1 is first calculated as the amount falling through the |
| 563 |
C**** canopy under the assumption that all rain falls randomly. |
| 564 |
C**** only a fraction 1-XTCORR falls randomly, though, so the result |
| 565 |
C**** is multiplied by 1-XTCORR. |
| 566 |
C**** |
| 567 |
WATADD = TRAINL(ChNo)*DTSTEP + SMELT(CHNO)*DTSTEP |
| 568 |
CAVAIL = ( SATCAP(CHNO) - CAPAC(CHNO) ) * FWETL |
| 569 |
WETINT = CAPAC(CHNO)/SATCAP(CHNO) |
| 570 |
IF( WATADD*(1.-WETINT) .LT. CAVAIL ) THEN |
| 571 |
THRU1 = WATADD*WETINT |
| 572 |
ELSE |
| 573 |
THRU1 = (WATADD - CAVAIL) |
| 574 |
ENDIF |
| 575 |
THRU1=THRU1*(1.-XTCORR) |
| 576 |
|
| 577 |
C**** THRU2 is the amount that falls immediately through the canopy due |
| 578 |
C**** to 'position memory'. |
| 579 |
|
| 580 |
THRU2=XTCORR*WATADD |
| 581 |
|
| 582 |
THRUL=THRU1+THRU2 |
| 583 |
CAPAC(CHNO)=CAPAC(CHNO)+WATADD-THRU1-THRU2 |
| 584 |
C**** |
| 585 |
C**** --------------------------------------------------- |
| 586 |
C**** |
| 587 |
C**** STEP 2: Moist convective precipitation. |
| 588 |
C**** |
| 589 |
C**** Determine XTCORR, the fraction of a storm that falls on a previously |
| 590 |
C**** wet surface due to the time correlation of precipitation position. |
| 591 |
|
| 592 |
XTCORR= (1.-TIMFRC) * MIN( 1. _d 0,(CAPAC(CHNO)/SATCAP(CHNO))/ |
| 593 |
$ FWETC ) |
| 594 |
|
| 595 |
C**** |
| 596 |
C**** Fill interception reservoir with precipitation. |
| 597 |
C**** THRU1 is first calculated as the amount falling through the |
| 598 |
C**** canopy under the assumption that all rain falls randomly. |
| 599 |
C**** only a fraction 1-XTCORR falls randomly, though, so the result |
| 600 |
C**** is multiplied by 1-XTCORR. |
| 601 |
C**** |
| 602 |
WATADD = TRAINC(ChNo)*DTSTEP |
| 603 |
CAVAIL = ( SATCAP(CHNO) - CAPAC(CHNO) ) * FWETC |
| 604 |
WETINT = CAPAC(CHNO)/SATCAP(CHNO) |
| 605 |
IF( WATADD*(1.-WETINT) .LT. CAVAIL ) THEN |
| 606 |
THRU1 = WATADD*WETINT |
| 607 |
ELSE |
| 608 |
THRU1 = (WATADD - CAVAIL) |
| 609 |
ENDIF |
| 610 |
THRU1=THRU1*(1.-XTCORR) |
| 611 |
|
| 612 |
C**** THRU2 is the amount that falls immediately through the canopy due |
| 613 |
C**** to 'position memory'. |
| 614 |
|
| 615 |
THRU2=XTCORR*WATADD |
| 616 |
|
| 617 |
THRUC=THRU1+THRU2 |
| 618 |
CAPAC(CHNO)=CAPAC(CHNO)+WATADD-THRU1-THRU2 |
| 619 |
C**** |
| 620 |
C***** ================================================================= |
| 621 |
C**** |
| 622 |
C**** Add precipitation moisture to soil, generate runoff. if |
| 623 |
C**** temperature is below freezing, all precipitation runs off. |
| 624 |
C**** |
| 625 |
C**** STEP 1: Large scale condensation: |
| 626 |
C**** |
| 627 |
IF(SWET1(CHNO).GT.WETEQ1(CHNO) .AND. WETEQ1(CHNO).NE.1.) THEN |
| 628 |
WETFRC=(SWET1(CHNO)-WETEQ1(CHNO))/(1.-WETEQ1(CHNO)) |
| 629 |
ELSE |
| 630 |
WETFRC=0. |
| 631 |
ENDIF |
| 632 |
|
| 633 |
CAVAIL = ( 1.-WETFRC)*FWETL*WMAX(1,ITYP(ChNo))*(1-WETEQ1(CHNO)) |
| 634 |
IF ( THRUL * (1-WETFRC) .LT. CAVAIL ) THEN |
| 635 |
WRUNL = THRUL * WETFRC |
| 636 |
SWET1(ChNo) = SWET1(ChNo) |
| 637 |
* + THRUL * ( 1. - WETFRC) / WMAX(1,ITYP(ChNo)) |
| 638 |
ELSE |
| 639 |
WRUNL = THRUL - CAVAIL |
| 640 |
SWET1(CHNO) = SWET1(CHNO) + CAVAIL / WMAX(1,ITYP(ChNo)) |
| 641 |
ENDIF |
| 642 |
C**** |
| 643 |
|
| 644 |
C**** STEP 2: Moist convective precipitation: |
| 645 |
C**** |
| 646 |
IF(SWET1(CHNO).GT.WETEQ1(CHNO) .AND. WETEQ1(CHNO).NE.1.) THEN |
| 647 |
WETFRC=(SWET1(CHNO)-WETEQ1(CHNO))/(1.-WETEQ1(CHNO)) |
| 648 |
ELSE |
| 649 |
WETFRC=0. |
| 650 |
ENDIF |
| 651 |
|
| 652 |
CAVAIL = (1.-WETFRC)*FWETC*WMAX(1,ITYP(ChNo))*(1-WETEQ1(CHNO)) |
| 653 |
IF ( THRUC * (1-WETFRC) .LT. CAVAIL ) THEN |
| 654 |
WRUNC = THRUC * WETFRC |
| 655 |
SWET1(ChNo) = SWET1(ChNo) |
| 656 |
* + THRUC * ( 1. - WETFRC) / WMAX(1,ITYP(ChNo)) |
| 657 |
ELSE |
| 658 |
WRUNC = THRUC - CAVAIL |
| 659 |
SWET1(CHNO) = SWET1(CHNO) + CAVAIL / WMAX(1,ITYP(ChNo)) |
| 660 |
ENDIF |
| 661 |
C**** |
| 662 |
RUNOFF(ChNo) = RUNOFF(ChNo) + (WRUNC+WRUNL)/DTSTEP |
| 663 |
RUNSRF(ChNo) = RUNSRF(ChNo) + (WRUNC+WRUNL)/DTSTEP |
| 664 |
FWSOIL(CHNO) = FWSOIL(CHNO) + (THRUC+THRUL-WRUNC-WRUNL)/DTSTEP |
| 665 |
C**** |
| 666 |
100 CONTINUE |
| 667 |
C**** |
| 668 |
RETURN |
| 669 |
END |
| 670 |
C**** |
| 671 |
C**** [ END INTERC ] |
| 672 |
C**** |
| 673 |
C**** ----------------------------------------------------------------- |
| 674 |
C**** ///////////////////////////////////////////////////////////////// |
| 675 |
C**** ----------------------------------------------------------------- |
| 676 |
C**** |
| 677 |
C**** [ BEGIN RCUNST ] |
| 678 |
C**** |
| 679 |
SUBROUTINE RCUNST ( |
| 680 |
I NCH, ITYP, SUNANG, SQSCAT, PDIR, |
| 681 |
I PAR, ZLAI, GREEN, |
| 682 |
O RCUN |
| 683 |
& ) |
| 684 |
C**** |
| 685 |
C**** This subroutine calculates the unstressed canopy resistance. |
| 686 |
C**** (p. 1353, Sellers 1985.) Extinction coefficients are computed first. |
| 687 |
C**** |
| 688 |
IMPLICIT NONE |
| 689 |
C**** |
| 690 |
#include "sibber.h" |
| 691 |
C**** |
| 692 |
INTEGER NCH |
| 693 |
INTEGER ITYP(NCH), ChNo |
| 694 |
|
| 695 |
_RL SUNANG(NCH), PDIR(NCH), PAR(NCH), ZLAI(NCH), |
| 696 |
& SQSCAT(NCH), GREEN(NCH), RCUN(NCH) |
| 697 |
|
| 698 |
_RL VGCHIL(NTYPS), VGZMEW(NTYPS), |
| 699 |
& VGRST1(NTYPS), VGRST2(NTYPS), VGRST3(NTYPS) |
| 700 |
|
| 701 |
_RL RHO4, EXTK1, EXTK2, |
| 702 |
& RCINV, GAMMA, EKAT, DUM1, |
| 703 |
& DUM2, DUM3, AA, BB, |
| 704 |
& ZK, CC |
| 705 |
|
| 706 |
|
| 707 |
DATA VGCHIL / 0.1, 0.25, 0.01, -0.3, |
| 708 |
5 0.01, 0.20, 0.0, 0.0, |
| 709 |
9 0.0, 0.0 / |
| 710 |
|
| 711 |
DATA VGZMEW/ 0.9809, 0.9638, 0.9980, 1.0773, |
| 712 |
5 0.9980, 0.9676, 1.000, 1.000, |
| 713 |
9 1.000, 1.0000 / |
| 714 |
|
| 715 |
DATA VGRST1 / 2335.9, 9802.2, 2869.7, 2582.0, |
| 716 |
5 93989.4, 9802.2, 0.0, 0.0, |
| 717 |
9 0.0 , 0.0/ |
| 718 |
|
| 719 |
DATA VGRST2 / 0.0, 10.6, 3.7, 1.1, |
| 720 |
5 0.01, 10.6, 0.0, 0.0, |
| 721 |
9 0.0 , 0.0/ |
| 722 |
|
| 723 |
DATA VGRST3 / 153.5, 180.0, 233.0, 110.0, |
| 724 |
5 855.0, 180.0, 1.0, 1.0, |
| 725 |
9 1.0, 1.0 / |
| 726 |
|
| 727 |
|
| 728 |
|
| 729 |
|
| 730 |
DO 100 ChNo = 1, NCH |
| 731 |
|
| 732 |
C**** First compute optical parameters. |
| 733 |
C**** (Note: CHIL is constrained to be >= 0.01, as in SiB calcs.) |
| 734 |
|
| 735 |
AA = 0.5 - (0.633 + 0.330*VGCHIL(ITYP(ChNo)))*VGCHIL(ITYP(ChNo)) |
| 736 |
BB = 0.877 * ( ONE - 2.*AA ) |
| 737 |
CC = ( AA + BB*SUNANG(ChNo) ) / SUNANG(ChNo) |
| 738 |
|
| 739 |
EXTK1 = CC * SQSCAT(ChNo) |
| 740 |
EXTK2 = (ONE / VGZMEW(ITYP(ChNo))) * SQSCAT(ChNo) |
| 741 |
|
| 742 |
DUM1 = PDIR(ChNo) * CC |
| 743 |
DUM2 = (ONE-PDIR(ChNo)) * ( BB*(ONE/3.+PIE/4.) + AA*1.5 ) |
| 744 |
|
| 745 |
C**** Bound extinction coefficient by 50./ZLAI: |
| 746 |
|
| 747 |
ZK = PDIR(ChNo) *MIN( EXTK1, 50. _d 0/ZLAI(ChNo) ) + |
| 748 |
& (ONE-PDIR(ChNo))*MIN( EXTK2, 50. _d 0/ZLAI(ChNo) ) |
| 749 |
|
| 750 |
C**** Now compute unstressed canopy resistance: |
| 751 |
|
| 752 |
GAMMA = VGRST1(ITYP(ChNo)) / VGRST3(ITYP(ChNo)) + |
| 753 |
& VGRST2(ITYP(ChNo)) |
| 754 |
|
| 755 |
EKAT = EXP( ZK*ZLAI(ChNo) ) |
| 756 |
RHO4 = GAMMA / (PAR(ChNo) * (DUM1 + DUM2)) |
| 757 |
|
| 758 |
DUM1 = (VGRST2(ITYP(ChNo)) - GAMMA) / (GAMMA + 1.E-20) |
| 759 |
DUM2 = (RHO4 * EKAT + ONE) / (RHO4 + ONE) |
| 760 |
DUM3 = ZK * VGRST3(ITYP(ChNo)) |
| 761 |
RCINV = ( DUM1*LOG(DUM2) + ZK*ZLAI(ChNo) ) / DUM3 |
| 762 |
|
| 763 |
RCUN(ChNo) = ONE / (RCINV * GREEN(ChNo) + 1.E-10) |
| 764 |
|
| 765 |
100 CONTINUE |
| 766 |
|
| 767 |
|
| 768 |
RETURN |
| 769 |
END |
| 770 |
C**** |
| 771 |
C**** [ END RCUNST ] |
| 772 |
C**** |
| 773 |
C**** ----------------------------------------------------------------- |
| 774 |
C**** ///////////////////////////////////////////////////////////////// |
| 775 |
C**** ----------------------------------------------------------------- |
| 776 |
C**** |
| 777 |
C**** [ BEGIN SOIL ] |
| 778 |
C**** |
| 779 |
SUBROUTINE SOIL ( |
| 780 |
I NCH, ITYP, WET, VGBEEX, VGPSAX, VGCSAX, DELZ, |
| 781 |
O PHR, SOILCO, WETEQ |
| 782 |
& ) |
| 783 |
C**** |
| 784 |
C**** This subroutine returns soil moisture potential and conductivity. |
| 785 |
|
| 786 |
IMPLICIT NONE |
| 787 |
C**** |
| 788 |
#include "sibber.h" |
| 789 |
C**** |
| 790 |
INTEGER NCH |
| 791 |
INTEGER ITYP(NCH), ChNo |
| 792 |
|
| 793 |
_RL WET(NCH), PHR(NCH), SOILCO(NCH), VGPSAX(NCH), |
| 794 |
& VGCSAX(NCH), VGBEEX(NCH), DELZ(NTYPS), WETEQ(NCH), |
| 795 |
& WEXPB, WET0, PHEQ |
| 796 |
|
| 797 |
DO 100 ChNo = 1, NCH |
| 798 |
|
| 799 |
WET0 = MAX(WET(CHNO),0.01 _d 0) |
| 800 |
WEXPB = WET0**VGBEEX(ChNo) |
| 801 |
|
| 802 |
PHR(ChNo) = VGPSAX(ChNo) / WEXPB |
| 803 |
SOILCO(ChNo) = VGCSAX(ChNo) * WEXPB * WEXPB * WET0 * WET0 * WET0 |
| 804 |
|
| 805 |
PHEQ = PHR(CHNO) - DELZ(ITYP(CHNO)) |
| 806 |
WETEQ(CHNO) = ( PHEQ/VGPSAX(CHNO) ) ** ( -1/VGBEEX(CHNO) ) |
| 807 |
|
| 808 |
100 CONTINUE |
| 809 |
|
| 810 |
RETURN |
| 811 |
END |
| 812 |
C**** |
| 813 |
C**** [ END SOIL ] |
| 814 |
C**** |
| 815 |
C**** ----------------------------------------------------------------- |
| 816 |
C**** ///////////////////////////////////////////////////////////////// |
| 817 |
C**** ----------------------------------------------------------------- |
| 818 |
C**** |
| 819 |
C**** [ BEGIN FLUXES ] |
| 820 |
C**** |
| 821 |
SUBROUTINE FLUXES ( |
| 822 |
I NCH, ITYP, DTSTEP, ESATTC, DESDTC, ALHX, |
| 823 |
I ETURB, DEDEA, DEDTC, HSTURB, DHSDEA, DHSDTC, |
| 824 |
I RC, DRCDEA, DRCDTC, |
| 825 |
I SWNET, HLWDWN, ALWRAD, BLWRAD, ESNFRC, |
| 826 |
I TM, EM, CSOIL, PSUR, EMAXRT, WMAX, |
| 827 |
U TC, TD, EA, SWET1, SNOW, |
| 828 |
O RUNOFF, EVAP, SHFLUX, SMELT, HLWUP, BOMB, STRDG1, |
| 829 |
O STRDG2, STRDG3, STRDG4, STRDG5, STRDG6, STRDG7, |
| 830 |
O STRDG8, STRDG9 |
| 831 |
& ) |
| 832 |
C**** |
| 833 |
C**** This subroutine computes the fluxes of latent and sensible heat |
| 834 |
C**** from the surface through an energy balance calculation. |
| 835 |
C**** |
| 836 |
IMPLICIT NONE |
| 837 |
C**** |
| 838 |
#include "sibber.h" |
| 839 |
C**** |
| 840 |
INTEGER NCH |
| 841 |
INTEGER ITYP(NCH), ChNo |
| 842 |
|
| 843 |
_RL DTSTEP, ESATTC(NCH), DESDTC(NCH), ALHX(NCH), |
| 844 |
& ETURB(NCH), DEDEA(NCH), DEDTC(NCH), |
| 845 |
& HSTURB(NCH), DHSDEA(NCH), DHSDTC(NCH), |
| 846 |
& RC(NCH), DRCDEA(NCH), DRCDTC(NCH), |
| 847 |
& SWNET(NCH), HLWDWN(NCH), ALWRAD(NCH), BLWRAD(NCH), |
| 848 |
& TM(NCH), EM(NCH), CSOIL(NCH), PSUR(NCH), |
| 849 |
& EMAXRT(NCH), WMAX(NLAY,NTYPS), |
| 850 |
& TC(NCH), TD(NCH), EA(NCH), ESNFRC(NCH), |
| 851 |
& SWET1(NCH,NLAY), SNOW(NCH), |
| 852 |
& RUNOFF(NCH), EVAP(NCH), SHFLUX(NCH), SMELT(NCH), |
| 853 |
& HLWUP(NCH), BOMB(NCH) |
| 854 |
_RL STRDG1(NCH),STRDG2(NCH),STRDG3(NCH),STRDG4(NCH) |
| 855 |
_RL STRDG5(NCH),STRDG6(NCH),STRDG7(NCH),STRDG8(NCH) |
| 856 |
_RL STRDG9(NCH) |
| 857 |
|
| 858 |
_RL HLWTC, CDEEPS, Q0, RHOAIR, CONST, DHLWTC, |
| 859 |
& EPLANT, A11, A12, A21, A22, F0, |
| 860 |
& DEA, DTC, SNLEFT, Q0X, Q0SNOW, |
| 861 |
& EANEW, ESATNW, EHARMN, DETERM, DENOM |
| 862 |
|
| 863 |
LOGICAL CHOKE |
| 864 |
_RL deepfac(ntyps) |
| 865 |
DATA deepfac /1.,1.,1.,1.,1.,1.,1.,1.,1.,1./ |
| 866 |
C**** |
| 867 |
C**** ------------------------------------------------------------------- |
| 868 |
|
| 869 |
DO 200 ChNo = 1, NCH |
| 870 |
C**** |
| 871 |
HLWTC = ALWRAD(CHNO) + BLWRAD(CHNO) * TC(CHNO) |
| 872 |
CDEEPS = PIE * CSOIL(ChNo) * 2. / 86400. |
| 873 |
RHOAIR = PSUR(ChNo) * 100. / (RGAS * TC(ChNo)) |
| 874 |
CONST = RHOAIR * EPSILON / PSUR(ChNo) |
| 875 |
DHLWTC = BLWRAD(CHNO) |
| 876 |
C**** |
| 877 |
C**** Compute matrix elements A11, A22, AND Q0 (energy balance equation). |
| 878 |
C**** |
| 879 |
|
| 880 |
A11 = CSOIL(ChNo)/DTSTEP + |
| 881 |
& DHLWTC + |
| 882 |
& DHSDTC(ChNo) + |
| 883 |
& ALHX(CHNO)*DEDTC(ChNo) + |
| 884 |
& CDEEPS |
| 885 |
A12 = DHSDEA(ChNo) + ALHX(CHNO) * DEDEA(ChNo) |
| 886 |
Q0 = SWNET(ChNo) + |
| 887 |
& HLWDWN(ChNo) - |
| 888 |
& HLWTC - |
| 889 |
& HSTURB(ChNo) - |
| 890 |
& ALHX(CHNO) * ETURB(ChNo) - |
| 891 |
& CDEEPS * (TC(ChNo) - TD(ChNo)) |
| 892 |
|
| 893 |
STRDG3(ChNo)=Q0/A11 |
| 894 |
STRDG4(ChNo)=(SWNET(ChNo)+HLWDWN(ChNo)-HLWTC)/A11 |
| 895 |
STRDG5(ChNo)=HSTURB(ChNo)/A11 |
| 896 |
STRDG6(ChNo)=ALHX(CHNO)*ETURB(ChNo)/A11 |
| 897 |
STRDG7(ChNo)=CDEEPS*(TC(ChNo) - TD(ChNo))/A11 |
| 898 |
STRDG9(ChNo)=A11 |
| 899 |
|
| 900 |
C**** |
| 901 |
C**** Compute matrix elements A21, A22, and F0 (canopy water budget |
| 902 |
C**** equation) and solve for fluxes. Three cases are considered: |
| 903 |
C**** |
| 904 |
C**** 1. Standard case: RC>0. |
| 905 |
C**** 2. RC = 0. Can only occur if CIR is full or ETURB is negative. |
| 906 |
C**** |
| 907 |
CHOKE = .TRUE. |
| 908 |
|
| 909 |
IF( RC(CHNO) .GT. 0.) THEN |
| 910 |
EPLANT = CONST * (ESATTC(ChNo) - EA(ChNo)) / RC(ChNo) |
| 911 |
IF(EPLANT*ETURB(ChNo).GE.0.) THEN |
| 912 |
EHARMN = 2.*EPLANT*ETURB(CHNO) / (EPLANT + ETURB(ChNo)) |
| 913 |
ELSE |
| 914 |
EHARMN=0. |
| 915 |
ENDIF |
| 916 |
C**** |
| 917 |
C**** Some limitations to A21 and A22 are applied: |
| 918 |
C**** we assume that the increase in plant evaporation |
| 919 |
C**** due to an increase in either TC or EA balances |
| 920 |
C**** or outweighs any decrease due to RC changes. |
| 921 |
C**** |
| 922 |
|
| 923 |
A21 = -DEDTC(ChNo)*RC(ChNo) + |
| 924 |
& max(0. _d 0, CONST*DESDTC(ChNo) - EHARMN*DRCDTC(ChNo) ) |
| 925 |
A22 = -( RC(ChNo)*DEDEA(ChNo) + |
| 926 |
& max( 0. _d 0, CONST + EHARMN*DRCDEA(ChNo) ) ) |
| 927 |
|
| 928 |
F0 = RC(ChNo) * (ETURB(ChNo) - EPLANT) |
| 929 |
DETERM = MIN( A12*A21/(A11*A22) - 1., -0.1 _d 0) |
| 930 |
DEA = ( Q0*A21 - A11*F0 ) / ( DETERM * A11*A22 ) |
| 931 |
DTC = ( Q0 - A12*DEA ) / A11 |
| 932 |
|
| 933 |
STRDG1(ChNo)=DTC |
| 934 |
STRDG2(ChNo)=DEA |
| 935 |
STRDG8(ChNo)=-A12*DEA/A11 |
| 936 |
|
| 937 |
EVAP(ChNo) = ETURB(ChNo) + DEDEA(ChNo)*DEA + DEDTC(ChNo)*DTC |
| 938 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 939 |
& DHSDTC(ChNo)*DTC |
| 940 |
DENOM = DETERM * A11*A22 |
| 941 |
ELSE |
| 942 |
CHOKE = .FALSE. |
| 943 |
A21 = -DESDTC(ChNo) |
| 944 |
A22 = 1. |
| 945 |
F0 = ESATTC(ChNo) - EA(ChNo) |
| 946 |
DEA = ( Q0*A21 - A11*F0 ) / ( A12*A21 - A11*A22 ) |
| 947 |
DTC = ( Q0 - A12*DEA ) / A11 |
| 948 |
|
| 949 |
STRDG1(ChNo)=DTC |
| 950 |
STRDG2(ChNo)=DEA |
| 951 |
STRDG8(ChNo)=-A12*DEA/A11 |
| 952 |
|
| 953 |
EVAP(ChNo) = ETURB(ChNo) + DEDEA(ChNo)*DEA + DEDTC(ChNo)*DTC |
| 954 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 955 |
& DHSDTC(ChNo)*DTC |
| 956 |
DENOM = A12 * A21 - A11*A22 |
| 957 |
ENDIF |
| 958 |
|
| 959 |
|
| 960 |
C**** - - - - - - - - - - - - - - - - - - - - |
| 961 |
C**** Account for snowmelt, if necessary. |
| 962 |
C**** - - - - - - - - - - - - - - - - - - - - |
| 963 |
SMELT(CHNO)=0. |
| 964 |
SNLEFT=SNOW(CHNO)-EVAP(CHNO)*DTSTEP*ESNFRC(CHNO) |
| 965 |
IF(TC(CHNO)+DTC .GT. TF .AND. SNLEFT.GT.0.) THEN |
| 966 |
|
| 967 |
C**** First re-calculate energy balance under assumption that all |
| 968 |
C**** snow is melted. |
| 969 |
|
| 970 |
Q0X=Q0-ALHM*SNLEFT/DTSTEP |
| 971 |
SMELT(CHNO)=SNLEFT/DTSTEP |
| 972 |
|
| 973 |
DEA = ( Q0X*A21 - A11*F0 ) / DENOM |
| 974 |
DTC = ( Q0X - A12*DEA ) / A11 |
| 975 |
|
| 976 |
C**** If TC+DTC is now less than TF, too much snow has melted. Now |
| 977 |
C**** solve for balance assuming only some of the snow has melted. |
| 978 |
C**** Set TC to TF. |
| 979 |
|
| 980 |
IF(TC(CHNO)+DTC .LT. TF) THEN |
| 981 |
DTC=TF-TC(CHNO) |
| 982 |
DEA=(F0-A21*DTC)/A22 |
| 983 |
Q0SNOW=A11*DTC+A12*DEA |
| 984 |
SMELT(CHNO)=(Q0-Q0SNOW)/ALHM |
| 985 |
ENDIF |
| 986 |
|
| 987 |
STRDG1(ChNo)=DTC |
| 988 |
STRDG2(ChNo)=DEA |
| 989 |
STRDG8(ChNo)=-A12*DEA/A11 |
| 990 |
|
| 991 |
EVAP(ChNo) = ETURB(ChNo) + DEDEA(ChNo)*DEA + |
| 992 |
& DEDTC(ChNo)*DTC |
| 993 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 994 |
& DHSDTC(ChNo)*DTC |
| 995 |
|
| 996 |
ENDIF |
| 997 |
|
| 998 |
C**** - - - - - - - - - - - - - - - - - - - - - - - |
| 999 |
C**** Adjustments |
| 1000 |
|
| 1001 |
C**** 1. Adjust deltas and fluxes if all available water evaporates |
| 1002 |
C**** during time step: |
| 1003 |
C**** |
| 1004 |
IF( EVAP(CHNO) .GT. EMAXRT(CHNO) ) THEN |
| 1005 |
CHOKE = .FALSE. |
| 1006 |
DEA = EM(CHNO) - EA(CHNO) |
| 1007 |
DTC = |
| 1008 |
& (Q0 + ALHX(CHNO)*(ETURB(ChNo)-EMAXRT(CHNO)) - DHSDEA(CHNO)*DEA) |
| 1009 |
& / ( A11 - ALHX(CHNO)*DEDTC(ChNo) ) |
| 1010 |
|
| 1011 |
STRDG1(ChNo)=DTC |
| 1012 |
STRDG2(ChNo)=DEA |
| 1013 |
STRDG8(ChNo)=0. |
| 1014 |
|
| 1015 |
EVAP(CHNO) = EMAXRT(CHNO) |
| 1016 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 1017 |
& DHSDTC(ChNo)*DTC |
| 1018 |
SMELT(CHNO)=0. |
| 1019 |
ENDIF |
| 1020 |
C**** |
| 1021 |
C**** Adjust DEA and DTC if solutions were pathological: |
| 1022 |
C**** |
| 1023 |
ESATNW = ESATTC(CHNO)+DESDTC(CHNO)*DTC |
| 1024 |
EANEW = EA(CHNO) + DEA |
| 1025 |
|
| 1026 |
|
| 1027 |
|
| 1028 |
C**** 2. Pathological cases. |
| 1029 |
|
| 1030 |
C**** Case 1: EVAP is positive in presence of negative gradient. |
| 1031 |
C**** Case 2: EVAP and ETURB have opposite sign, implying that |
| 1032 |
C**** "virtual effects" derivatives are meaningless and thus that we |
| 1033 |
C**** do not know the proper tendency terms. |
| 1034 |
C**** In both cases, assume zero evaporation for the time step. |
| 1035 |
|
| 1036 |
C IF( ( EVAP(CHNO) .LT. 0. .AND. EM(CHNO).LT.ESATNW ) |
| 1037 |
C & .OR. ( EVAP(CHNO)*ETURB(CHNO) .LT. 0. ) ) THEN |
| 1038 |
IF( EVAP(CHNO) .LT. 0. .AND. EM(CHNO).LT.ESATNW ) THEN |
| 1039 |
CHOKE = .FALSE. |
| 1040 |
DEA = EM(CHNO) - EA(CHNO) |
| 1041 |
DTC = ( Q0 + ALHX(CHNO)*ETURB(ChNo) - DHSDEA(CHNO)*DEA ) / |
| 1042 |
& ( A11 - ALHX(CHNO)*DEDTC(ChNo) ) |
| 1043 |
|
| 1044 |
STRDG1(ChNo)=DTC |
| 1045 |
STRDG2(ChNo)=DEA |
| 1046 |
STRDG8(ChNo)=0. |
| 1047 |
|
| 1048 |
EVAP(CHNO) = 0. |
| 1049 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 1050 |
& DHSDTC(ChNo)*DTC |
| 1051 |
|
| 1052 |
IF(TC(CHNO)+DTC .GT. TF .AND. SNOW(CHNO).GT.0.) THEN |
| 1053 |
Q0X=Q0-ALHM*SNOW(CHNO)/DTSTEP |
| 1054 |
SMELT(CHNO)=SNOW(CHNO)/DTSTEP |
| 1055 |
DTC = ( Q0X + ALHX(CHNO)*ETURB(ChNo) - DHSDEA(CHNO)*DEA ) / |
| 1056 |
& ( A11 - ALHX(CHNO)*DEDTC(ChNo) ) |
| 1057 |
IF(TC(CHNO)+DTC .LT. TF) THEN |
| 1058 |
DTC=TF-TC(CHNO) |
| 1059 |
Q0SNOW=A11*DTC+A12*DEA |
| 1060 |
SMELT(CHNO)=(Q0-Q0SNOW)/ALHM |
| 1061 |
ENDIF |
| 1062 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 1063 |
& DHSDTC(ChNo)*DTC |
| 1064 |
ENDIF |
| 1065 |
ENDIF |
| 1066 |
|
| 1067 |
|
| 1068 |
|
| 1069 |
C**** 3. Exceesive dea change: apply "choke". |
| 1070 |
|
| 1071 |
IF( CHOKE .AND. ABS(DEA) .GT. 0.5*EA(CHNO) ) THEN |
| 1072 |
DEA = SIGN(.5*EA(CHNO),DEA) |
| 1073 |
DTC = ( Q0 - A12*DEA ) / A11 |
| 1074 |
|
| 1075 |
STRDG1(ChNo)=DTC |
| 1076 |
STRDG2(ChNo)=DEA |
| 1077 |
STRDG8(ChNo)=-A12*DEA/A11 |
| 1078 |
|
| 1079 |
EVAP(ChNo) = ETURB(ChNo) + DEDEA(ChNo)*DEA + DEDTC(ChNo)*DTC |
| 1080 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 1081 |
& DHSDTC(ChNo)*DTC |
| 1082 |
IF(TC(CHNO)+DTC .GT. TF .AND. SNOW(CHNO).GT.0.) THEN |
| 1083 |
SNLEFT=SNOW(CHNO)-EVAP(CHNO)*DTSTEP*ESNFRC(CHNO) |
| 1084 |
Q0X=Q0-ALHM*SNLEFT/DTSTEP |
| 1085 |
SMELT(CHNO)=SNLEFT/DTSTEP |
| 1086 |
DTC = ( Q0X - A12*DEA ) / A11 |
| 1087 |
IF(TC(CHNO)+DTC .LT. TF) THEN |
| 1088 |
DTC=TF-TC(CHNO) |
| 1089 |
Q0SNOW=A11*DTC+A12*DEA |
| 1090 |
SMELT(CHNO)=(Q0-Q0SNOW)/ALHM |
| 1091 |
ENDIF |
| 1092 |
EVAP(ChNo) = ETURB(ChNo) + DEDEA(ChNo)*DEA + DEDTC(ChNo)*DTC |
| 1093 |
SHFLUX(ChNo) = HSTURB(ChNo) + DHSDEA(ChNo)*DEA + |
| 1094 |
& DHSDTC(ChNo)*DTC |
| 1095 |
ENDIF |
| 1096 |
ENDIF |
| 1097 |
|
| 1098 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1099 |
|
| 1100 |
TC(ChNo) = TC(ChNo) + DTC |
| 1101 |
EA(ChNo) = EA(ChNo) + DEA |
| 1102 |
TD(ChNo) = TD(ChNo) + |
| 1103 |
c CHANGED THIS: deep layer 2 times deeper |
| 1104 |
& DTSTEP * CDEEPS * (TC(ChNo) - TD(ChNo)) / |
| 1105 |
. (CSOIL(ChNo)*67.73*deepfac(ityp(ChNo))) |
| 1106 |
HLWUP(CHNO) = HLWTC + DHLWTC*DTC |
| 1107 |
|
| 1108 |
SNOW(CHNO)=SNOW(CHNO)-SMELT(CHNO)*DTSTEP |
| 1109 |
|
| 1110 |
C**** Make sure EA remains positive |
| 1111 |
|
| 1112 |
EA(CHNO) = MAX(EA(CHNO), 0.0 _d 0) |
| 1113 |
|
| 1114 |
200 CONTINUE |
| 1115 |
|
| 1116 |
|
| 1117 |
|
| 1118 |
RETURN |
| 1119 |
END |
| 1120 |
C**** |
| 1121 |
C**** [ END FLUXES ] |
| 1122 |
C**** |
| 1123 |
C**** ----------------------------------------------------------------- |
| 1124 |
C**** ///////////////////////////////////////////////////////////////// |
| 1125 |
C**** ----------------------------------------------------------------- |
| 1126 |
C**** |
| 1127 |
C**** [ BEGIN VPDFAC ] |
| 1128 |
C**** |
| 1129 |
SUBROUTINE VPDFAC ( |
| 1130 |
I NCH, ITYP, ESATTC, EA, |
| 1131 |
O VPDSTR |
| 1132 |
& ) |
| 1133 |
C**** |
| 1134 |
C**** This subroutine computes the vapor pressure deficit stress. |
| 1135 |
C**** |
| 1136 |
IMPLICIT NONE |
| 1137 |
C**** |
| 1138 |
#include "sibber.h" |
| 1139 |
C**** |
| 1140 |
INTEGER NCH |
| 1141 |
INTEGER ITYP(NCH), ChNo |
| 1142 |
_RL ESATTC(NCH), EA(NCH), VPDSTR(NCH) |
| 1143 |
c _RL VGDFAC(NTYPS) |
| 1144 |
C**** |
| 1145 |
c DATA VGDFAC / .0273, .0357, .0310, .0238, |
| 1146 |
c 5 .0275, .0275, 0., 0., |
| 1147 |
c 9 0., 0. / |
| 1148 |
C**** |
| 1149 |
C**** ----------------------------------------------------------------- |
| 1150 |
|
| 1151 |
DO 100 ChNo = 1, NCH |
| 1152 |
C**** |
| 1153 |
c VPDSTR(ChNo) = 1. - (ESATTC(ChNo)-EA(ChNo)) * VGDFAC(ITYP(ChNo)) |
| 1154 |
c VPDSTR (ChNo) = MIN( 1. _d 0, MAX( VPDSTR(ChNo), 1. _d -10 ) ) |
| 1155 |
VPDSTR(CHNO) = 1. |
| 1156 |
C**** |
| 1157 |
100 CONTINUE |
| 1158 |
C**** |
| 1159 |
RETURN |
| 1160 |
END |
| 1161 |
C**** |
| 1162 |
C**** [ END VPDFAC ] |
| 1163 |
C**** |
| 1164 |
C**** ----------------------------------------------------------------- |
| 1165 |
C**** ///////////////////////////////////////////////////////////////// |
| 1166 |
C**** ----------------------------------------------------------------- |
| 1167 |
C**** |
| 1168 |
C**** [ BEGIN TMPFAC ] |
| 1169 |
C**** |
| 1170 |
SUBROUTINE TMPFAC ( |
| 1171 |
I NCH, ITYP, TC, |
| 1172 |
O FTEMP |
| 1173 |
& ) |
| 1174 |
C**** |
| 1175 |
C**** Compute temperature stress factor. |
| 1176 |
C**** |
| 1177 |
IMPLICIT NONE |
| 1178 |
C**** |
| 1179 |
#include "sibber.h" |
| 1180 |
C**** |
| 1181 |
INTEGER NCH |
| 1182 |
INTEGER ITYP(NCH), ChNo, TypPtr |
| 1183 |
_RL TC(NCH), FTEMP(NCH) |
| 1184 |
_RL VGTLL(MemFac*NTYPS), VGTU(MemFac*NTYPS), |
| 1185 |
& VGTCF1(MemFac*NTYPS), VGTCF2(MemFac*NTYPS), |
| 1186 |
& VGTCF3(MemFac*NTYPS) |
| 1187 |
C**** |
| 1188 |
DATA VGTLL /MemFac*273., MemFac*273., MemFac*268., MemFac*283., |
| 1189 |
5 MemFac*283., MemFac*273., MemFac* 0., MemFac* 0., |
| 1190 |
9 MemFac* 0., MemFac* 0. / |
| 1191 |
DATA VGTU /MemFac*318., MemFac*318., MemFac*313., MemFac*328., |
| 1192 |
5 MemFac*323., MemFac*323., MemFac* 0., MemFac* 0., |
| 1193 |
9 MemFac* 0. , MemFac* 0./ |
| 1194 |
DATA VGTCF1 / MemFac*-1.43549E-06, MemFac*-6.83584E-07, |
| 1195 |
3 MemFac* 1.67699E-07, MemFac*-1.43465E-06, |
| 1196 |
5 MemFac*-2.76097E-06, MemFac*-1.58094E-07, |
| 1197 |
7 MemFac* 0., MemFac* 0., |
| 1198 |
9 MemFac* 0. , MemFac* 0./ |
| 1199 |
DATA VGTCF2 / MemFac* 7.95859E-04, MemFac* 3.72064E-04, |
| 1200 |
3 MemFac*-7.65944E-05, MemFac* 8.24060E-04, |
| 1201 |
5 MemFac* 1.57617E-03, MemFac* 8.44847E-05, |
| 1202 |
7 MemFac* 0., MemFac* 0., |
| 1203 |
9 MemFac* 0. , MemFac* 0./ |
| 1204 |
DATA VGTCF3 / MemFac*-1.11575E-01, MemFac*-5.21533E-02, |
| 1205 |
3 MemFac* 6.14960E-03, MemFac*-1.19602E-01, |
| 1206 |
5 MemFac*-2.26109E-01, MemFac*-1.27272E-02, |
| 1207 |
7 MemFac* 0., MemFac* 0., |
| 1208 |
9 MemFac* 0. , MemFac* 0./ |
| 1209 |
C**** |
| 1210 |
C**** ---------------------------------------------------------------- |
| 1211 |
|
| 1212 |
DO 100 ChNo = 1, NCH |
| 1213 |
C**** |
| 1214 |
TypPtr = MOD(ChNo,MemFac) + (ITYP(ChNo)-1)*MemFac + 1 |
| 1215 |
FTEMP(ChNo) = (TC(ChNo) - VGTLL(TypPtr)) * |
| 1216 |
& (TC(ChNo) - VGTU(TypPtr)) * |
| 1217 |
& ( VGTCF1(TypPtr)*TC(ChNo)*TC(ChNo) + |
| 1218 |
& VGTCF2(TypPtr)*TC(ChNo) + |
| 1219 |
& VGTCF3(TypPtr) ) |
| 1220 |
IF ( TC(ChNo) .LE. VGTLL(TypPtr) .OR. TC(ChNo) .GE. VGTU(TypPtr) ) |
| 1221 |
& FTEMP (ChNo) = 1.E-10 |
| 1222 |
FTEMP(CHNO) = MIN( 1. _d 0, MAX( FTEMP(ChNo), 1. _d -10 ) ) |
| 1223 |
C**** |
| 1224 |
100 CONTINUE |
| 1225 |
C**** |
| 1226 |
RETURN |
| 1227 |
END |
| 1228 |
C**** |
| 1229 |
C**** [ END TMPFAC ] |
| 1230 |
C**** |
| 1231 |
C**** ----------------------------------------------------------------- |
| 1232 |
C**** ///////////////////////////////////////////////////////////////// |
| 1233 |
C**** ----------------------------------------------------------------- |
| 1234 |
C**** |
| 1235 |
C**** [ BEGIN SMFAC ] |
| 1236 |
C**** |
| 1237 |
SUBROUTINE SMFAC ( |
| 1238 |
I NCH, ITYP, ESATTC, EA, PHR, SOILCO, |
| 1239 |
I RCUN, VPDSTR, FTEMP, TC, PSUR, Z2, |
| 1240 |
I RSOIL1, RSOIL2, VGPH1X, VGPH2X, VGRPLX, |
| 1241 |
O RC |
| 1242 |
& ) |
| 1243 |
C**** |
| 1244 |
C**** This subroutine estimates RC after computing the |
| 1245 |
C**** leaf water potential stress. |
| 1246 |
C**** |
| 1247 |
IMPLICIT NONE |
| 1248 |
C**** |
| 1249 |
#include "sibber.h" |
| 1250 |
C**** |
| 1251 |
INTEGER NCH |
| 1252 |
INTEGER ITYP(NCH), ChNo |
| 1253 |
_RL ESATTC(NCH), EA(NCH), PHR(NCH), SOILCO(NCH), |
| 1254 |
& RCUN(NCH), VPDSTR(NCH), FTEMP(NCH), TC(NCH), |
| 1255 |
& PSUR(NCH), Z2(NCH), RSOIL1(NCH), RSOIL2(NCH), |
| 1256 |
& VGPH1X(NCH), VGPH2X(NCH), VGRPLX(NCH), RC(NCH) |
| 1257 |
_RL RCUNTD, RHOAIR, CONST, DEF, D12, DR2, |
| 1258 |
& RSOIL, R0, EEST, RSTFAC |
| 1259 |
C**** |
| 1260 |
C**** ----------------------------------------------------------------- |
| 1261 |
|
| 1262 |
DO 100 ChNo = 1, NCH |
| 1263 |
C**** |
| 1264 |
RCUNTD = RCUN(ChNo) / ( VPDSTR(ChNo)*FTEMP(ChNo) ) |
| 1265 |
RHOAIR = PSUR(ChNo) * 100. / ( RGAS*TC(ChNo) ) |
| 1266 |
|
| 1267 |
C**** |
| 1268 |
CONST = RHOAIR * EPSILON / PSUR(ChNo) |
| 1269 |
DEF = ( ESATTC(ChNo) - EA(ChNo) ) * CONST |
| 1270 |
D12 = VGPH1X(ChNo) - VGPH2X(ChNo) |
| 1271 |
DR2 = PHR(ChNo) - Z2(ChNo) - VGPH2X(ChNo) |
| 1272 |
RSOIL = RSOIL1(ChNo) + RSOIL2(ChNo)/SOILCO(ChNo) |
| 1273 |
R0 = ( VGRPLX(ChNo) + RSOIL ) / RHOW |
| 1274 |
EEST = DEF*DR2 / ( RCUNTD*D12 + DEF*R0 ) |
| 1275 |
RSTFAC = ( DR2 - R0*EEST ) / D12 |
| 1276 |
RSTFAC = MIN( 1. _d 0, MAX( 0.001 _d 0, RSTFAC ) ) |
| 1277 |
RC(ChNo) = RCUNTD / RSTFAC |
| 1278 |
C**** |
| 1279 |
100 CONTINUE |
| 1280 |
C**** |
| 1281 |
RETURN |
| 1282 |
END |
| 1283 |
C**** |
| 1284 |
C**** [ END SMFAC ] |
| 1285 |
C**** |
| 1286 |
C**** ----------------------------------------------------------------- |
| 1287 |
C**** ///////////////////////////////////////////////////////////////// |
| 1288 |
C**** ----------------------------------------------------------------- |
| 1289 |
C**** |
| 1290 |
C**** [ BEGIN RSURFP ] |
| 1291 |
C**** |
| 1292 |
SUBROUTINE RSURFP ( |
| 1293 |
I NCH, UM, U2FAC, Z2, RDC, WET, ESATTC, EA, |
| 1294 |
U RC, |
| 1295 |
O RX1, RX2 |
| 1296 |
& ) |
| 1297 |
C**** |
| 1298 |
IMPLICIT NONE |
| 1299 |
INTEGER NCH |
| 1300 |
INTEGER ChNo |
| 1301 |
_RL UM(NCH), U2FAC(NCH), Z2(NCH), RDC(NCH), |
| 1302 |
& WET(NCH), ESATTC(NCH), EA(NCH), |
| 1303 |
& RC(NCH), RX1(NCH), RX2(NCH) |
| 1304 |
_RL U2, RSURF, HESAT |
| 1305 |
C**** |
| 1306 |
C**** ----------------------------------------------------------------- |
| 1307 |
|
| 1308 |
DO 100 ChNo = 1, NCH |
| 1309 |
C**** |
| 1310 |
U2 = UM(ChNo) * U2FAC(ChNo) |
| 1311 |
c RSURF = RDC(ChNo) / U2 + 30. / (1.E-20 + WET(ChNo)) |
| 1312 |
RSURF = RDC(ChNo) / U2 + 26. + 6. / (1.E-20 + WET(ChNo))**2 |
| 1313 |
|
| 1314 |
C**** Account for subsaturated humidity at soil surface: |
| 1315 |
C**** |
| 1316 |
HESAT = ESATTC(CHNO) * MIN( 1. _d 0, WET(CHNO)*2. _d 0) |
| 1317 |
IF( EA(CHNO) .LT. HESAT ) THEN |
| 1318 |
RSURF=RSURF*( 1. + (ESATTC(CHNO)-HESAT)/(HESAT-EA(CHNO)) ) |
| 1319 |
ELSE |
| 1320 |
RSURF=1.E10 |
| 1321 |
ENDIF |
| 1322 |
|
| 1323 |
|
| 1324 |
RX1(CHNO)=RC(CHNO) |
| 1325 |
RX2(CHNO)=RSURF |
| 1326 |
|
| 1327 |
RC(ChNo) = RC(CHNO) * RSURF / ( RC(ChNo) + RSURF ) |
| 1328 |
C**** |
| 1329 |
100 CONTINUE |
| 1330 |
C**** |
| 1331 |
RETURN |
| 1332 |
END |
| 1333 |
C**** |
| 1334 |
C**** [ END RSURFP ] |
| 1335 |
C**** |
| 1336 |
C**** ----------------------------------------------------------------- |
| 1337 |
C**** ///////////////////////////////////////////////////////////////// |
| 1338 |
C**** ----------------------------------------------------------------- |
| 1339 |
C**** |
| 1340 |
C**** [ BEGIN RCANOP ] |
| 1341 |
C**** |
| 1342 |
SUBROUTINE RCANOP ( |
| 1343 |
I NCH, CAPAC, SNOW, SATCAP, RA, ETURB, SNWFRC, |
| 1344 |
I POTFRC, |
| 1345 |
U RC |
| 1346 |
& ) |
| 1347 |
C**** |
| 1348 |
C**** The effective latent heat resistance RC depends on the quantity |
| 1349 |
C**** of interception reservoir water and the snow cover. POTFRC |
| 1350 |
C**** is the fraction of the tile from which potential evaporation |
| 1351 |
C**** occurs. |
| 1352 |
C**** |
| 1353 |
IMPLICIT NONE |
| 1354 |
INTEGER NCH |
| 1355 |
INTEGER ChNo |
| 1356 |
_RL CAPAC(NCH), SNOW(NCH), SATCAP(NCH), RA(NCH), ETURB(NCH), |
| 1357 |
& RC(NCH), SNWFRC(NCH), POTFRC(NCH) |
| 1358 |
_RL ETCRIT,RAMPFC |
| 1359 |
|
| 1360 |
C**** (Note: ETCRIT arbitrarily set to ~-5 W/m2, or -2.e-6 mm/sec.) |
| 1361 |
DATA ETCRIT/ -2.E-6 / |
| 1362 |
C**** |
| 1363 |
C**** ----------------------------------------------------------------- |
| 1364 |
|
| 1365 |
DO 100 ChNo = 1, NCH |
| 1366 |
|
| 1367 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1368 |
C**** Case 1: Vegetation present (SATCAP GT .001). Potential evap. from |
| 1369 |
c**** both interception reservoir and snow. |
| 1370 |
|
| 1371 |
IF(SATCAP(CHNO).GT..001) THEN |
| 1372 |
RC(ChNo)=RC(ChNo)*(1.-POTFRC(CHNO))/ |
| 1373 |
& ( 1.+POTFRC(CHNO)*RC(ChNo)/RA(ChNo) ) |
| 1374 |
ENDIF |
| 1375 |
|
| 1376 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1377 |
C**** Case 2: Vegetation absent (SATCAP LE .001). Potential evap. from |
| 1378 |
c**** snow only. |
| 1379 |
|
| 1380 |
IF(SATCAP(CHNO) .LE. .001) THEN |
| 1381 |
RC(ChNo)=RC(ChNo)*(1.-SNWFRC(CHNO))/ |
| 1382 |
& ( 1.+SNWFRC(CHNO)*RC(ChNo)/RA(ChNo) ) |
| 1383 |
ENDIF |
| 1384 |
|
| 1385 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1386 |
C**** Assume RC=0 for condensation (dew). |
| 1387 |
C**** RAMPFC is used to ensure continuity in RC. |
| 1388 |
|
| 1389 |
RAMPFC=ETURB(CHNO)/ETCRIT |
| 1390 |
IF ( RAMPFC .GE. 0. ) RC(CHNO) = RC(CHNO)*(1.-RAMPFC) |
| 1391 |
IF ( RAMPFC .GT. 1. ) RC(ChNo) = 0. |
| 1392 |
C**** |
| 1393 |
100 CONTINUE |
| 1394 |
C**** |
| 1395 |
RETURN |
| 1396 |
END |
| 1397 |
C**** |
| 1398 |
C**** [ END RCANOP ] |
| 1399 |
C**** |
| 1400 |
C**** ----------------------------------------------------------------- |
| 1401 |
C**** ///////////////////////////////////////////////////////////////// |
| 1402 |
C**** ----------------------------------------------------------------- |
| 1403 |
C**** |
| 1404 |
C***** [ BEGIN WUPDAT ] |
| 1405 |
C**** |
| 1406 |
SUBROUTINE WUPDAT ( |
| 1407 |
I NCH, ITYP, DTSTEP, |
| 1408 |
I EVAP, SATCAP, VGWMAX, TC, RA, RC, |
| 1409 |
I RX1, RX2,ESNFRC,EIRFRC, |
| 1410 |
U CAPAC, SNOW, SWET, RUNOFF, |
| 1411 |
O EINT, ESOI, EVEG, ESNO, RUNSRF, FWSOIL |
| 1412 |
& ) |
| 1413 |
C**** |
| 1414 |
C**** This subroutine allows evapotranspiration to adjust the water |
| 1415 |
C**** contents of the interception reservoir and the soil layers. |
| 1416 |
C**** |
| 1417 |
IMPLICIT NONE |
| 1418 |
C**** |
| 1419 |
#include "sibber.h" |
| 1420 |
C**** |
| 1421 |
INTEGER NCH |
| 1422 |
INTEGER ITYP(NCH), ChNo |
| 1423 |
_RL EVAP(NCH), SATCAP(NCH), VGWMAX(NLAY,NTYPS), |
| 1424 |
& TC(NCH), RA(NCH), RC(NCH), |
| 1425 |
& CAPAC(NCH), SNOW(NCH), SWET(nch,NLAY), |
| 1426 |
& RUNOFF(NCH), RX1(NCH), |
| 1427 |
& RX2(NCH), RUNSRF(NCH), FWSOIL(NCH), |
| 1428 |
& ESNFRC(NCH), EIRFRC(NCH) |
| 1429 |
_RL EINT(NCH), ESOI(NCH), EVEG(NCH), ESNO(NCH) |
| 1430 |
_RL DTSTEP, EGRO, FWS, THRU, DEWRUN, |
| 1431 |
& WTOTAL,WLAY1,WLAY2,ELAY1,ELAY2,EGROI |
| 1432 |
C**** |
| 1433 |
C**** ----------------------------------------------------------------- |
| 1434 |
|
| 1435 |
DO 100 ChNo = 1, NCH |
| 1436 |
C**** |
| 1437 |
C**** Partition evap between interception, snow, and ground reservoirs. |
| 1438 |
C**** |
| 1439 |
WLAY1 = SWET(ChNo,SFCLY) * VGWMAX(SFCLY,ITYP(ChNo)) |
| 1440 |
WLAY2 = SWET(ChNo,ROOTLY) * VGWMAX(ROOTLY,ITYP(ChNo)) |
| 1441 |
WTOTAL = WLAY1 + WLAY2 |
| 1442 |
C**** |
| 1443 |
ESNO(CHNO)=ESNFRC(CHNO)*EVAP(CHNO)*DTSTEP |
| 1444 |
EINT(CHNO)=EIRFRC(CHNO)*EVAP(CHNO)*DTSTEP |
| 1445 |
EGRO = EVAP(CHNO)*DTSTEP - ESNO(CHNO) - EINT(CHNO) |
| 1446 |
|
| 1447 |
C**** Ensure that individual capacities are not exceeded. |
| 1448 |
|
| 1449 |
IF(ESNO(CHNO) .GT. SNOW(CHNO)) THEN |
| 1450 |
EINT(CHNO)=EINT(CHNO)+(ESNO(CHNO)-SNOW(CHNO)) |
| 1451 |
ESNO(CHNO)=SNOW(CHNO) |
| 1452 |
ENDIF |
| 1453 |
EGROI=EGRO+EINT(CHNO) |
| 1454 |
IF(EGROI .GT. CAPAC(CHNO)+WTOTAL) THEN |
| 1455 |
ESNO(CHNO)=ESNO(CHNO)+EGROI-(CAPAC(CHNO)+WTOTAL) |
| 1456 |
EGROI=CAPAC(CHNO)+WTOTAL |
| 1457 |
ENDIF |
| 1458 |
|
| 1459 |
EINT(CHNO)=EGROI-EGRO |
| 1460 |
IF(EINT(CHNO) .GT. CAPAC(CHNO)) THEN |
| 1461 |
EGRO=EGRO+EINT(CHNO)-CAPAC(CHNO) |
| 1462 |
EINT(CHNO)=CAPAC(CHNO) |
| 1463 |
ENDIF |
| 1464 |
IF(EGRO .GT. WTOTAL) THEN |
| 1465 |
EINT(CHNO)=EINT(CHNO)+EGRO-WTOTAL |
| 1466 |
EGRO=WTOTAL |
| 1467 |
ENDIF |
| 1468 |
C**** |
| 1469 |
C**** Separate egro into surface-evaporation/transpiration components: |
| 1470 |
C**** |
| 1471 |
IF( RX1(CHNO)+RX2(CHNO) .NE. 0. ) THEN |
| 1472 |
ESOI(CHNO)=EGRO*RX1(CHNO)/(RX1(CHNO)+RX2(CHNO)) |
| 1473 |
EVEG(CHNO)=EGRO - ESOI(CHNO) |
| 1474 |
ELSE |
| 1475 |
ESOI(CHNO)=EGRO/2. |
| 1476 |
EVEG(CHNO)=EGRO/2. |
| 1477 |
ENDIF |
| 1478 |
C**** |
| 1479 |
C**** Translate ESOI and EVEG into evaporation fluxes from layers 1 and 2: |
| 1480 |
C**** |
| 1481 |
IF( WTOTAL .GT. 0. ) THEN |
| 1482 |
FWS = EVEG(CHNO) / WTOTAL |
| 1483 |
ELSE |
| 1484 |
FWS = 1. |
| 1485 |
ENDIF |
| 1486 |
ELAY1 = WLAY1*FWS + ESOI(CHNO) |
| 1487 |
ELAY2 = WLAY2*FWS |
| 1488 |
C**** |
| 1489 |
C**** Ensure that enough soil water is available in each layer: |
| 1490 |
C**** |
| 1491 |
IF( ELAY1 .GT. WLAY1 ) THEN |
| 1492 |
ELAY2 = ELAY2 + (ELAY1 - WLAY1) |
| 1493 |
ELAY1 = WLAY1 |
| 1494 |
ENDIF |
| 1495 |
IF( ELAY2 .GT. WLAY2 ) THEN |
| 1496 |
ELAY1 = ELAY1 + (ELAY2 - WLAY2) |
| 1497 |
ELAY2 = WLAY2 |
| 1498 |
ENDIF |
| 1499 |
|
| 1500 |
C**** Special case for condensation: |
| 1501 |
IF(EVAP(CHNO) .LT. 0.) THEN |
| 1502 |
EINT(CHNO)=(1.-ESNFRC(CHNO))*EVAP(CHNO)*DTSTEP |
| 1503 |
ELAY1=0. |
| 1504 |
ELAY2=0. |
| 1505 |
ESOI(CHNO)=0. |
| 1506 |
EVEG(CHNO)=0. |
| 1507 |
ESNO(CHNO)=ESNFRC(CHNO)*EVAP(CHNO)*DTSTEP |
| 1508 |
ENDIF |
| 1509 |
|
| 1510 |
C**** |
| 1511 |
C**** Remove moisture from reservoirs: |
| 1512 |
C**** |
| 1513 |
SNOW(ChNo) = SNOW(ChNo) - ESNO(CHNO) |
| 1514 |
CAPAC(ChNo) = CAPAC(ChNo) - EINT(CHNO) |
| 1515 |
SWET(ChNo,SFCLY) = (WLAY1 - ELAY1) / VGWMAX(SFCLY,ITYP(ChNo)) |
| 1516 |
SWET(ChNo,ROOTLY) = (WLAY2 - ELAY2) / VGWMAX(ROOTLY,ITYP(CHNO)) |
| 1517 |
C**** |
| 1518 |
C**** Ensure against numerical precision problems: |
| 1519 |
SWET(ChNo,SFCLY) = MIN( 1. _d 0, MAX( 0. _d 0, SWET(ChNo,SFCLY) ) |
| 1520 |
$ ) |
| 1521 |
SWET(ChNo,ROOTLY) = MIN( 1. _d 0, MAX( 0. _d 0, SWET(ChNo,ROOTLY) |
| 1522 |
$ ) ) |
| 1523 |
C**** |
| 1524 |
C**** |
| 1525 |
C**** ------------------------------------------------- |
| 1526 |
C**** DEWFALL: |
| 1527 |
C**** |
| 1528 |
C**** If dewfall adds to cir, insure that it does not fill |
| 1529 |
C**** beyond capacity. If resulting throughfall adds to top soil layer, |
| 1530 |
C**** insure that it also does not fill beyond capacity. |
| 1531 |
C**** |
| 1532 |
IF( CAPAC(ChNo) .GT. SATCAP(ChNo) ) THEN |
| 1533 |
THRU = CAPAC(ChNo) - SATCAP(ChNo) |
| 1534 |
CAPAC(ChNo) = SATCAP(ChNo) |
| 1535 |
SWET(ChNo,SFCLY) = SWET(ChNo,SFCLY) + |
| 1536 |
& THRU / VGWMAX(SFCLY,ITYP(ChNo)) |
| 1537 |
DEWRUN=0. |
| 1538 |
IF ( SWET(ChNo,SFCLY) .GT. 1. ) THEN |
| 1539 |
DEWRUN = ( SWET(ChNo,SFCLY) - 1. ) * VGWMAX(SFCLY,ITYP(ChNo)) |
| 1540 |
SWET(ChNo,SFCLY) = 1. |
| 1541 |
RUNOFF(ChNo) = RUNOFF(ChNo) + DEWRUN/DTSTEP |
| 1542 |
RUNSRF(ChNo) = RUNSRF(ChNo) + DEWRUN/DTSTEP |
| 1543 |
ENDIF |
| 1544 |
FWSOIL(CHNO) = FWSOIL(CHNO) + (THRU-DEWRUN)/DTSTEP |
| 1545 |
ENDIF |
| 1546 |
C**** |
| 1547 |
100 CONTINUE |
| 1548 |
C**** |
| 1549 |
RETURN |
| 1550 |
END |
| 1551 |
C**** |
| 1552 |
C**** [ END WUPDAT ] |
| 1553 |
C**** |
| 1554 |
C**** ----------------------------------------------------------------- |
| 1555 |
C**** ///////////////////////////////////////////////////////////////// |
| 1556 |
C**** ----------------------------------------------------------------- |
| 1557 |
C**** |
| 1558 |
C**** [ BEGIN GWATER ] |
| 1559 |
C**** |
| 1560 |
SUBROUTINE GWATER ( |
| 1561 |
I NCH, ITYP, WSMAX, PHLAY, AKLAY, TC, |
| 1562 |
I DTSTEP, VGZDEX, VGSLOX, WETEQ1, WETEQ2, |
| 1563 |
I PHSAT, AKSAT, |
| 1564 |
U SWET, RUNOFF, GDRAIN |
| 1565 |
& ) |
| 1566 |
C**** |
| 1567 |
C**** This subroutine computes diffusion between soil layers. |
| 1568 |
C**** |
| 1569 |
IMPLICIT NONE |
| 1570 |
C**** |
| 1571 |
#include "sibber.h" |
| 1572 |
C**** |
| 1573 |
INTEGER NCH |
| 1574 |
INTEGER ITYP(NCH), ChNo |
| 1575 |
_RL VGSLOX(NCH), RUNOFF(NCH), GDRAIN(NCH) |
| 1576 |
_RL ZDEP12, AKAVE, GWFLUX, ZDEP23, HALFMX, DHDZ, |
| 1577 |
& FAREA, TFM2, FRAMP |
| 1578 |
|
| 1579 |
_RL WSMAX(NLAY,NTYPS), PHLAY(nch,NLAY), |
| 1580 |
& AKLAY(nch,NLAY), TC(NCH), |
| 1581 |
& DTSTEP, SWET(nch,NLAY), |
| 1582 |
& VGZDEX(NLAY,nch), WETEQ1(NCH), WETEQ2(NCH), |
| 1583 |
& PHSAT(NCH), AKSAT(NCH) |
| 1584 |
|
| 1585 |
C**** |
| 1586 |
C**** ---------------------------------------------------------------- |
| 1587 |
|
| 1588 |
DO 100 ChNo = 1, NCH |
| 1589 |
C**** |
| 1590 |
C**** Diffusion between layer 1 and 2: |
| 1591 |
ZDEP12 = VGZDEX(SFCLY,ChNo) + VGZDEX(ROOTLY,ChNo) |
| 1592 |
IF( SWET(CHNO,SFCLY) .GT. WETEQ1(CHNO) ) THEN |
| 1593 |
FAREA=(SWET(CHNO,SFCLY) - WETEQ1(CHNO)) / (1. - WETEQ1(CHNO)) |
| 1594 |
DHDZ = 1. + 2.*(PHSAT(CHNO)-PHLAY(CHNO,ROOTLY))/ZDEP12 |
| 1595 |
AKAVE = AKSAT(CHNO) |
| 1596 |
ELSE |
| 1597 |
FAREA = 1. |
| 1598 |
DHDZ = 1. + 2.*(PHLAY(ChNo,SFCLY)-PHLAY(ChNo,ROOTLY))/ZDEP12 |
| 1599 |
AKAVE = AKLAY(ChNo,ROOTLY) |
| 1600 |
ENDIF |
| 1601 |
C**** |
| 1602 |
GWFLUX = 1000. * DTSTEP * AKAVE * DHDZ * FAREA |
| 1603 |
C**** |
| 1604 |
C**** Test for limits on water holding capacity. |
| 1605 |
C**** |
| 1606 |
HALFMX=0.5*ABS( SWET(CHNO,SFCLY)-WETEQ1(CHNO) ) |
| 1607 |
& * WSMAX(SFCLY,ITYP(CHNO)) |
| 1608 |
IF (GWFLUX .GE. 0.) THEN |
| 1609 |
GWFLUX = MIN( GWFLUX, |
| 1610 |
& SWET(ChNo,SFCLY) * WSMAX(SFCLY,ITYP(ChNo)) ) |
| 1611 |
GWFLUX = MIN( GWFLUX, WSMAX(ROOTLY,ITYP(ChNo)) - |
| 1612 |
& SWET(ChNo,ROOTLY) * WSMAX(ROOTLY,ITYP(ChNo)) ) |
| 1613 |
GWFLUX = MIN( GWFLUX, HALFMX ) |
| 1614 |
ELSE |
| 1615 |
GWFLUX = -MIN( ABS(GWFLUX), |
| 1616 |
& SWET(ChNo,ROOTLY) * WSMAX(ROOTLY,ITYP(ChNo)) ) |
| 1617 |
GWFLUX = -MIN( ABS(GWFLUX), WSMAX(SFCLY,ITYP(ChNo)) - |
| 1618 |
& SWET(ChNo,SFCLY) * WSMAX(SFCLY,ITYP(ChNo)) ) |
| 1619 |
GWFLUX = -MIN( ABS(GWFLUX), HALFMX ) |
| 1620 |
ENDIF |
| 1621 |
C**** |
| 1622 |
C**** Prevent diffusion when ground is frozen (INCLUDE RAMPING): |
| 1623 |
TFM2=TF-2. |
| 1624 |
FRAMP=(TC(CHNO)-TFM2)/2. |
| 1625 |
FRAMP=MIN(1. _d 0, MAX(0. _d 0,FRAMP) ) |
| 1626 |
GWFLUX=GWFLUX*FRAMP |
| 1627 |
C**** |
| 1628 |
C**** Update water contents |
| 1629 |
SWET(ChNo,SFCLY) = SWET(ChNo,SFCLY) - |
| 1630 |
& GWFLUX / WSMAX(SFCLY,ITYP(ChNo)) |
| 1631 |
SWET(ChNo,ROOTLY) = SWET(ChNo,ROOTLY) + |
| 1632 |
& GWFLUX / WSMAX(ROOTLY,ITYP(ChNo)) |
| 1633 |
C**** |
| 1634 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1635 |
C**** Diffusion between root and recharge layers: |
| 1636 |
ZDEP23 = VGZDEX(ROOTLY,ChNo) + VGZDEX(RECHLY,ChNo) |
| 1637 |
DHDZ=1. + 2. * (PHLAY(ChNo,ROOTLY) - PHLAY(ChNo,RECHLY)) / ZDEP23 |
| 1638 |
IF(DHDZ.GE.0.) THEN |
| 1639 |
AKAVE = AKLAY(ChNo,ROOTLY) |
| 1640 |
ELSE |
| 1641 |
AKAVE = AKLAY(ChNo,RECHLY) |
| 1642 |
ENDIF |
| 1643 |
GWFLUX = 1000. * DTSTEP * AKAVE * DHDZ |
| 1644 |
C**** |
| 1645 |
C**** Test for limits on water holding capacity: |
| 1646 |
HALFMX=0.5*ABS( SWET(CHNO,ROOTLY)-WETEQ2(CHNO) ) |
| 1647 |
& * WSMAX(ROOTLY,ITYP(CHNO)) |
| 1648 |
IF (GWFLUX .GE. 0.) THEN |
| 1649 |
GWFLUX = MIN( GWFLUX, |
| 1650 |
& SWET(ChNo,ROOTLY) * WSMAX(ROOTLY,ITYP(ChNo)) ) |
| 1651 |
GWFLUX = MIN( GWFLUX, WSMAX(RECHLY,ITYP(ChNo)) - |
| 1652 |
& SWET(ChNo,RECHLY) * WSMAX(RECHLY,ITYP(ChNo)) ) |
| 1653 |
GWFLUX = MIN( GWFLUX, HALFMX ) |
| 1654 |
ELSE |
| 1655 |
GWFLUX = -MIN( ABS(GWFLUX), |
| 1656 |
& SWET(ChNo,RECHLY) * WSMAX(RECHLY,ITYP(ChNo)) ) |
| 1657 |
GWFLUX = -MIN( ABS(GWFLUX), WSMAX(ROOTLY,ITYP(ChNo)) - |
| 1658 |
& SWET(ChNo,ROOTLY) * WSMAX(ROOTLY,ITYP(ChNo)) ) |
| 1659 |
GWFLUX = -MIN( ABS(GWFLUX), HALFMX ) |
| 1660 |
ENDIF |
| 1661 |
C**** |
| 1662 |
C**** Prevent diffusion when ground is frozen (INCLUDE RAMPING): |
| 1663 |
FRAMP=(TC(CHNO)-TFM2)/2. |
| 1664 |
FRAMP=MIN(1. _d 0, MAX(0. _d 0,FRAMP) ) |
| 1665 |
GWFLUX=GWFLUX*FRAMP |
| 1666 |
C**** |
| 1667 |
C**** Update water contents |
| 1668 |
SWET(ChNo,ROOTLY) = SWET(ChNo,ROOTLY) - |
| 1669 |
& GWFLUX / WSMAX(ROOTLY,ITYP(ChNo)) |
| 1670 |
SWET(ChNo,RECHLY) = SWET(ChNo,RECHLY) + |
| 1671 |
& GWFLUX / WSMAX(RECHLY,ITYP(ChNo)) |
| 1672 |
GDRAIN(CHNO)=GWFLUX/DTSTEP |
| 1673 |
C**** |
| 1674 |
C**** - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| 1675 |
C**** Flux of moisture out of lower soil layer to water table |
| 1676 |
C**** (approximation to SiB) |
| 1677 |
C**** |
| 1678 |
GWFLUX = VGSLOX(ChNo) * AKLAY(ChNo,RECHLY) * 1000. * DTSTEP |
| 1679 |
|
| 1680 |
C**** Prevent diffusion when ground is frozen (INCLUDE RAMPING): |
| 1681 |
FRAMP=(TC(CHNO)-TFM2)/2. |
| 1682 |
FRAMP=MIN(1. _d 0, MAX(0. _d 0,FRAMP) ) |
| 1683 |
GWFLUX=GWFLUX*FRAMP |
| 1684 |
|
| 1685 |
GWFLUX = MIN( GWFLUX, |
| 1686 |
& SWET(ChNo,RECHLY) * WSMAX(RECHLY,ITYP(ChNo)) ) |
| 1687 |
SWET(ChNo,RECHLY) = SWET(ChNo,RECHLY) - |
| 1688 |
& GWFLUX / WSMAX(RECHLY,ITYP(ChNo)) |
| 1689 |
C**** |
| 1690 |
RUNOFF (ChNo) = RUNOFF (ChNo) + GWFLUX/DTSTEP |
| 1691 |
C**** |
| 1692 |
100 CONTINUE |
| 1693 |
C**** |
| 1694 |
RETURN |
| 1695 |
END |
| 1696 |
C**** |
| 1697 |
C**** [ END GWATER ] |
| 1698 |
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