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R2oldv.f
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!== last modified 3-29-2004
SUBROUTINE R2OLDV(VOLEQ,HTTOT,DBHOB,DRC,FCLASS,VOL,ERRFLAG,PROD,
& MTOPP)
IMPLICIT NONE
C-- THIS SUBROUTINE DETERMINES THE VOLUME OF A TREE
C-- USING REGION 2 D*D*H VOLUME DETERMINATION EQUATIONS.
! YW 2018/09/05 Added International boardfoot volume and sawlog portion cubic volume calculation
! for 200DVEW122, 200DVEW746, 200DVEW108, 200DVEW093 and 212DVEW122. This calculation
! is from FIA volume codes.
! YW 2018/09/06 Added 201DEVW746 AND MYERS(1964) RM-6 TOP=8 (Scribner and international)
! YW 2018/09/12 Changed the FCLASS to be: 1 = sngle, others = multistem
! This is to make it consistent with R3 DVE equation.
! YW 2022/08/05 Added new equation (223DVEW122) for Black Hills non-saw product (DBH<9)
! also add the input variable STUMP to the subroutine
! YW 2022/11/22 Moved the codes for equation 223DVEW122 to its own subroution
C**************************************************************
CHARACTER*10 VOLEQ
INTEGER ERRFLAG,MSTEM,FCLASS,I
CHARACTER*2 PROD
REAL MTOPP,TOPWOOD,CV6,SPF,DIB,X1,X2,X3
REAL DBHOB,DRC,D2H,HTTOT,VOL(15),grsbdt,GCUFT,TCUFT,trevol
TREVOL = 0.0
grsbdt=0.0
GCUFT=0.0
TCUFT=0.0
ERRFLAG = 0
! Changed the FCLASS to be: 1 = single, others = multistem
! 2018/09/12
IF(FCLASS .EQ. 1) THEN
MSTEM = 1
ELSE
MSTEM = 0
ENDIF
C-- IF DBHOB OR HTTOT EQUALS ZERO THEN DON'T CALCULATE THE VOLUME
IF (DBHOB .LE. 0.0 .AND. DRC.LE.0.0) THEN
ERRFLAG = 3
GO TO 1000
ENDIF
IF( HTTOT .LE. 0.0)THEN
ERRFLAG = 4
GO TO 1000
ENDIF
DO 100, I=1,15
VOL(I) = 0
100 CONTINUE
C-- CALCULATE THE DIAMETER SQUARED TIMES HEIGHT
D2H = (DBHOB**2)*(HTTOT)
C--*********** ASPEN-RM232-TOTAL PG3 TOTAL CUBIC
IF (VOLEQ(8:10).EQ.'746' .AND. VOLEQ(1:3).EQ.'200') THEN
IF ( D2H .LE. 12470. ) THEN
TCUFT = 0.002219 * D2H
ELSE
TCUFT = 0.001896 * D2H + 4.0267
ENDIF
C--************** ASPEN-RM232-TOP=6 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LE. 2500. ) THEN
grsbdt = 8
ELSEIF ( D2H .LE. 8850. ) THEN
grsbdt = 0.011389 * D2H - 20.5112
ELSE
grsbdt = 0.010344 * D2H - 11.2615
ENDIF
! INTERNATIONAL BOARDFOOT VOLUME (YW 2018/0905)
IF(D2H.LE.11460) THEN
VOL(10)= .013472*D2H-25.5968
ELSE
VOL(10) = .011989*D2H-8.6015
ENDIF
ENDIF
C--*********** ASPEN-RM232-TOP=4
IF ( D2H .LE. 11800. ) THEN
GCUFT = 0.002195 * D2H - 0.9076
ELSE
GCUFT = 0.001837 * D2H + 3.3075
ENDIF
! SAWLOG PORTION CUBIC VOLUME (YW 2018/09/05)
IF(PROD.EQ.'01'.AND.MTOPP.GE.6.0)THEN
IF(DBHOB.LT.11.0) THEN
SPF = 0.0
ELSEIF (DBHOB.GT.42.0) THEN
SPF = .96
ELSE
SPF =.92-(.22*((42.0-DBHOB)/33.0)**1.4)
ENDIF
CV6 = SPF*GCUFT
IF(CV6.GT.0.0)THEN
TOPWOOD = GCUFT-CV6
VOL(7) = TOPWOOD
GCUFT = CV6
ENDIF
ENDIF
! --Aspen
!Peterson, Geraldine. 1961. Volume Tables for Aspen in Colorado. Forest Service, U.S. Department of Agriculture, Rocky Mountain
!Forest Range Experiment Station. Research Notes, No. 63. 4p.
!volume to 4" top DIB
ELSEIF (VOLEQ(8:10).EQ.'746' .AND. VOLEQ(1:3).EQ.'201') THEN
DIB = (0.8954*DBHOB)+0.3168
X1 = LOG10(DIB-4.0)
X2 = LOG10(HTTOT-4.5)
X3 = X1*X2
GCUFT = (10**((0.0827*X1)+(0.4045*X2)+(.6593*X3)-0.4721))+0.3
C--*********** ASPEN-RM232-TOTAL PG3
ELSEIF (VOLEQ(8:10).EQ.'746' .AND. VOLEQ(1:3).EQ.'210') THEN
IF ( D2H .LE. 12470. ) THEN
GCUFT = 0.002219 * D2H
ELSE
GCUFT = 0.001896 * D2H + 4.0267
ENDIF
C******************************************************************
C--************* LODGEPOLE PINE-RM6-TOTAL PG5 TOTAL CUBIC
ELSEIF (VOLEQ(8:10).EQ.'108' .AND. VOLEQ(1:3).EQ.'200' ) THEN
IF ( D2H .LE. 7000.) THEN
TCUFT = 0.002777 * D2H + 0.027967
ELSE
TCUFT = 0.002332 * D2H + 3.446454
ENDIF
C--************* LODGEPOLE PINE-RM157-TOP=6 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LE. 22800. ) THEN
grsbdt = 0.01202 * D2H - 6.00933
ELSE
grsbdt = 0.01263 * D2H - 19.76641
ENDIF
! ADD INTERNATIONAL BOARDFOOT VOLUME FROM MYERS(1964) RM-6 TOP=8
IF(MTOPP.GE.8.0)THEN
IF(D2H.LE.15000.0)THEN
grsbdt = .012535*D2H-20.19057
VOL(10) = 0.015097*D2H - 26.28782
ELSE
grsbdt = .012893*D2H -29.24566
VOL(10) = 0.013766*D2H - 6.30999
ENDIF
ENDIF
ENDIF
C--************* LODGEPOLE PINE-RM6-TOP=4
IF ( D2H .LE. 7000.) THEN
GCUFT = 0.002798 * D2H - 1.04578
ELSE
GCUFT = 0.002256 * D2H + 2.836222
ENDIF
! SAWLOG PORTION CUBIC VOLUME (YW 2018/09/05)
IF(PROD.EQ.'01'.AND.MTOPP.GE.6.0)THEN
IF(DBHOB.LT.9.0) THEN
SPF = 0.0
ELSEIF (DBHOB.GT.42.0) THEN
SPF = .95
ELSE
SPF =.98-(.10*((42.0-DBHOB)/33.0)**4.0)
ENDIF
CV6 = SPF*GCUFT
IF(CV6.GT.0.0)THEN
TOPWOOD = GCUFT-CV6
VOL(7) = TOPWOOD
GCUFT = CV6
ENDIF
ENDIF
C--************* LODGEPOLE PINE-RM6-TOTAL PG5
ELSEIF (VOLEQ(8:10).EQ.'108' .AND. VOLEQ(1:3).EQ.'210') THEN
IF ( D2H .LE. 7000.) THEN
GCUFT = 0.002777 * D2H + 0.027967
ELSE
GCUFT = 0.002332 * D2H + 3.446454
ENDIF
C******************************************************************
C--************** PONDEROSA PINE PROSSER BLACK HILLS TOTAL TOTAL CUBIC
ELSEIF (VOLEQ(8:10).EQ.'122' .AND. VOLEQ(1:3).EQ.'203') THEN
IF ( D2H .LT. 6000. ) THEN
TCUFT = 0.0024506 * D2H + .3470564
ELSE
TCUFT = 0.0022325 * D2H + 3.2829984
ENDIF
C--************* PONDEROSA PINE PROSSER BLACK HILLS-TOP=6 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LT. 16000. ) THEN
grsbdt = .0132429 * D2H - 26.0553842
ELSE
grsbdt = 0.0127305 * D2H - 15.5653183
ENDIF
ENDIF
C--************** PONDEROSA PINE BLACK HILLS MYERS TOP=4
IF ( D2H .LE. 6700. ) THEN
GCUFT = 0.002297 * D2H - 1.032297
ELSE
GCUFT = 0.002407 * D2H - 2.257724
ENDIF
C--************** PONDEROSA PINE BLACK HILLS MYERS-RM8-TOT PG5
ELSEIF (VOLEQ(8:10).EQ.'122' .AND. VOLEQ(1:3).EQ.'213') THEN
IF ( D2H .LE. 6000. ) THEN
GCUFT = 0.002213 * D2H + 0.030288
ELSE
GCUFT = 0.002474 * D2H - 1.557103
ENDIF
C******************************************************************
C--************** PONDEROSA PINE FRONT RANGE-RM218-TOTAL PG4 TOTAL CUBIC
ELSEIF (VOLEQ(8:10).EQ.'122' .AND. VOLEQ(1:3).EQ.'200') THEN
TCUFT = 0.00226 * D2H
C--************** PONDEROSA PINE FRONT RANGE-RM218-TOP=6 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LE. 2830. ) THEN
grsbdt = 8
ELSE
grsbdt = 0.01149 * D2H - 24.5404
ENDIF
! ADDED CALCULATION OF INTERNATIONAL BD YW 2018/09/04
IF ( D2H .LE. 2535. ) THEN
VOL(10) = 9.0
ELSE
VOL(10) = .01286*D2H-23.5932
ENDIF
ENDIF
C--************** PONDEROSA PINE FRONT RANGE-RM218-TOP-4
GCUFT = 0.00216 * D2H - 0.44670
! SAWLOG PORTION CUBIC VOLUME (YW 2018/09/05)
IF(PROD.EQ.'01'.AND.MTOPP.GE.6.0)THEN
IF(DBHOB.LT.9.0) THEN
SPF = 0.0
ELSEIF (DBHOB.GT.42.0) THEN
SPF = .93
ELSE
SPF =.95-(.26*((42.0-DBHOB)/33.0)**7.0)
ENDIF
CV6 = SPF*GCUFT
IF(CV6.GT.0.0)THEN
TOPWOOD = GCUFT-CV6
VOL(7) = TOPWOOD
GCUFT = CV6
ENDIF
ENDIF
C--************** PONDEROSA PINE FRONT RANGE-RM218-TOTAL PG4
ELSEIF (VOLEQ(8:10).EQ.'122' .AND. VOLEQ(1:3).EQ.'210') THEN
GCUFT = 0.00226 * D2H
C******************************************************************
C--************** ENGELMAN SPRUCE-RM95-TOTAL PG5 TOTAL CUBIC
ELSEIF (VOLEQ(8:10).EQ.'093' .AND. VOLEQ(1:3).EQ.'200') THEN
IF ( D2H .LE. 22500. ) THEN
TCUFT = 0.00239 * D2H + 0.06439
ELSE
TCUFT = 0.00193 * D2H + 10.41663
ENDIF
C--************** ENGELMANN SPRUCE-RM95-TOP=6 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LE. 12200. ) THEN
grsbdt = 0.01097 * D2H - 15.14466
ELSE
grsbdt = 0.01202 * D2H - 27.91343
ENDIF
IF(D2H.LE.27300.0) THEN
VOL(10)= .01391*D2H-25.61022
ELSE
VOL(10)= .01235*D2H+17.02079
ENDIF
ENDIF
C--************** ENGELMAN SPRUCE-RM95-TOP=4
IF ( D2H .LE. 27900. ) THEN
GCUFT = 0.00232 * D2H - 0.83010
ELSE
GCUFT = 0.00182 * D2H + 13.11320
ENDIF
! SAWLOG PORTION CUBIC VOLUME (YW 2018/09/05)
IF(PROD.EQ.'01'.AND.MTOPP.GE.6.0)THEN
IF(DBHOB.LT.9.0) THEN
SPF = 0.0
ELSEIF (DBHOB.GT.42.0) THEN
SPF = .98
ELSE
SPF =.96-(.15*((42.0-DBHOB)/33.0)**3.0)
ENDIF
CV6 = SPF*GCUFT
IF(CV6.GT.0.0)THEN
TOPWOOD = GCUFT-CV6
VOL(7) = TOPWOOD
GCUFT = CV6
ENDIF
ENDIF
C--************** ENGELMAN SPRUCE-RM95-TOTAL PG5
ELSEIF (VOLEQ(8:10).EQ.'093' .AND. VOLEQ(1:3).EQ.'210') THEN
IF ( D2H .LE. 22500. ) THEN
GCUFT = 0.00239 * D2H + 0.06439
ELSE
GCUFT = 0.00193 * D2H + 10.41663
ENDIF
C******************************************************************
C--************** PONDEROSA PINE BLACK HILLS MYERS-RM8-TOT PG5 TOTAL CUBIC
ELSEIF (VOLEQ(8:10).EQ.'122' .AND. VOLEQ(1:3).EQ.'212') THEN
IF ( D2H .LE. 6000. ) THEN
TCUFT = 0.002213 * D2H + 0.030288
ELSE
TCUFT = 0.002474 * D2H - 1.557103
ENDIF
C--************** PONDEROSA PINE BLACK HILLS MYERS-RM8-TOP=8 BOARD FOOT
IF(DBHOB.GT.7)THEN
IF ( D2H .LE. 16000. ) THEN
grsbdt = 0.012331 * D2H - 34.167170
ELSE
grsbdt = 0.016318 * D2H - 99.212720
ENDIF
IF(D2H.LE.13000.0) THEN
VOL(10)= .015011*D2H-44.36046
ELSE
VOL(10)= .016991*D2H-68.7502
ENDIF
ENDIF
C--************** PONDEROSA PINE BLACK HILLS MYERS-RM8-TOP=4
IF ( D2H .LE. 6700. ) THEN
GCUFT = 0.002297 * D2H - 1.032297
ELSE
GCUFT = 0.002407 * D2H - 2.257724
ENDIF
! SAWLOG PORTION CUBIC VOLUME (YW 2018/09/05)
IF(PROD.EQ.'01'.AND.MTOPP.GE.6.0)THEN
IF(DBHOB.LT.9.0) THEN
SPF = 0.0
ELSEIF (DBHOB.GT.42.0) THEN
SPF = .93
ELSE
SPF =.95-(.26*((42.0-DBHOB)/33.0)**7.0)
ENDIF
CV6 = SPF*GCUFT
IF(CV6.GT.0.0)THEN
TOPWOOD = GCUFT-CV6
VOL(7) = TOPWOOD
GCUFT = CV6
ENDIF
ENDIF
C******************************************************************
C--************** Oneseed Juniper Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'069')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.19321+0.136101*D2H**(1./3.)+0.038187*MSTEM)**3.
GCUFT = TCUFT
C******************************************************************
C--************** Rocky Mountain Juniper Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'066')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (0.02434+0.119106*D2H**(1./3.))**3.
GCUFT = TCUFT
C******************************************************************
C--************** Utah Juniper Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'065')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.08728+0.135420*D2H**(1./3.)-0.019587*MSTEM)**3.
GCUFT = TCUFT
C******************************************************************
C--************** Gambel Oak Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'814')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.13600 + 0.145743*D2H**(1./3.))**3.
GCUFT = TCUFT
C******************************************************************
C--************** Bur Oak Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'823')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (0.12853 + 0.105885*D2H**(1./3.))**3.
GCUFT = TCUFT
C******************************************************************
C--************** Pinyon Pine
ELSEIF (VOLEQ(8:10).EQ.'106')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.20296 + 0.150283*D2H**(1./3.)+0.054178*MSTEM)**3.
GCUFT = TCUFT
C******************************************************************
C--************** Mountain Mahogany Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'475')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.13363 + 0.128222*D2H**(1./3.)+0.080208*MSTEM)**3.
!Set to 0.1 for tree with DIA < 3 to match FIA (20240426)
IF(DRC.LT.3.AND.DBHOB.LT.3) TCUFT = 0.1
GCUFT = TCUFT
C******************************************************************
C--************** Other Hardwoods Chojnacky INT-339
ELSEIF (VOLEQ(8:10).EQ.'998')THEN
c look for drc, if not use dbhob
IF(DRC .GT. 0) D2H = DRC*DRC*HTTOT
TCUFT = (-0.13822 + 0.121850*D2H**(1./3.))**3.
GCUFT = TCUFT
C-- (ENDIF FOR VOLEQU EQUAL TO A VALID EQUATION)
ELSE
ERRFLAG = 1
ENDIF
IF (TCUFT .LT. 0.0) THEN
TCUFT = 0.0
ENDIF
VOL(1) = TCUFT
IF (grsbdt .LT. 0.0) THEN
grsbdt = 0.0
ENDIF
VOL(2) = grsbdt
IF (GCUFT .LT. 0.0) THEN
GCUFT = 0.0
ENDIF
VOL(4) = GCUFT
1000 CONTINUE
RETURN
END
C**************************************************************
C Vol Equation 223DVEW122 for R2 Black Hills Ponderosa pine Non-saw prod
SUBROUTINE BH_NonSawPP(DBHOB,HTTOT,STUMP,MTOPP,MTOPS,
+ HT1PRD,HT2PRD,VOL,LOGVOL,LOGDIA,LOGLEN,BOLHT,LOGST,
+ NOLOGP,NOLOGS,SPFLG,PROD,ERRFLG)
IMPLICIT NONE
REAL DBHOB,HTTOT,STUMP,MTOPP,MTOPS,HT1PRD,HT2PRD
REAL VOL(15),LOGLEN(20),LOGVOL(7,20),LOGDIA(21,3),BOLHT(21)
REAL NOLOGP,NOLOGS,LOGLENT(20)
INTEGER LOGST,SPFLG,ERRFLG,I
CHARACTER*2 PROD
REAL TCUFT
! MRULE VARIABLES
CHARACTER*10 VOLEQ
CHARACTER*1 COR
CHARACTER*2 FORST
INTEGER EVOD,OPT,REGN,NUMSEG
REAL MAXLEN,MINLEN,MERCHL,TRIM
REAL MINLENT,MINBFD,BTR,DBTBH,LMERCH
REAL a,b,HTLOW,HT2,DIB,DIBL
IF(DBHOB.LT.1.0)THEN
ERRFLG = 3
RETURN
ENDIF
IF(HTTOT.LT.4.5)THEN
ERRFLG = 4
RETURN
ENDIF
LOGST = 0
NOLOGP = 0
NOLOGS = 0
VOL = 0.0
LOGLEN = 0.0
LOGVOL = 0.0
LOGDIA = 0.0
BOLHT = 0.0
LOGLENT = 0.0
CALL BH_PPTCU(DBHOB,HTTOT,TCUFT)
VOL(1) = TCUFT
IF(MTOPP.LT.0.1) MTOPP = 4.0
IF(MTOPS.LT.0.1) MTOPS = 2.0
REGN = 2
FORST = '03'
VOLEQ = '223DVEW122'
BTR = 0.0
DBTBH = 0.0
HT2 = STUMP
NUMSEG = 0
CALL MRULES(REGN,FORST,VOLEQ,DBHOB,COR,EVOD,OPT,MAXLEN,
> MINLEN,MERCHL,MINLENT,MTOPP,MTOPS,STUMP,TRIM,BTR,DBTBH,
> MINBFD,PROD)
CALL GetRatioCoef(a,b)
IF(HT1PRD.LT.0.1)THEN
HTLOW = 0.0
CALL GetHT2TOPD2(TCUFT,a,b,HTTOT,MTOPP,HT1PRD,HTLOW)
ENDIF
LMERCH = HT1PRD - STUMP
IF(LMERCH.GE.MERCHL)THEN
CALL NUMLOG(OPT,EVOD,LMERCH,MAXLEN,MINLEN,TRIM,NUMSEG)
CALL SEGMNT(OPT,EVOD,LMERCH,MAXLEN,MINLEN,TRIM,NUMSEG,LOGLEN)
LOGST = 0
HT2 = 4.5
CALL GetHTDIB2(TCUFT,a,b,HTTOT,HT2,DIB)
LOGDIA(1,2)= DIB
LOGDIA(1,1)=NINT(DIB)
BOLHT(1) = HT2
C-- USE DIB AT DBHOB FOR LARGE END BUTT LOG
DIBL = LOGDIA(1,1)
HT2 = STUMP
CALL CalcLOGVOL(LOGST,NUMSEG,DIBL,HT2,TCUFT,TRIM,HTTOT,
+ LOGLEN,LOGDIA,LOGVOL,BOLHT,VOL,COR)
LOGST = NUMSEG
NOLOGP = NUMSEG
ENDIF
C Calculate topwood volume
IF(SPFLG.EQ.1.AND.MTOPS.LT.MTOPP)THEN
IF(HT2PRD.LT.0.1)THEN
CALL GetHT2TOPD2(TCUFT,a,b,HTTOT,MTOPS,HT2PRD,HT2)
ENDIF
LMERCH = HT2PRD - HT2
IF(LMERCH.GE.MINLENT)THEN
NUMSEG = 0
CALL NUMLOG(OPT,EVOD,LMERCH,MAXLEN,MINLEN,TRIM,NUMSEG)
CALL SEGMNT(OPT,EVOD,LMERCH,MAXLEN,MINLEN,TRIM,NUMSEG,LOGLENT)
NOLOGS = NUMSEG
!Add secondary log length to LOGLEN
DO 600 I = 1, NUMSEG
LOGLEN(I+LOGST) = LOGLENT(I)
600 CONTINUE
CALL CalcLOGVOL(LOGST,NUMSEG,DIBL,HT2,TCUFT,TRIM,HTTOT,
+ LOGLEN,LOGDIA,LOGVOL,BOLHT,VOL,COR)
LOGST = LOGST + NUMSEG
ENDIF
ENDIF
RETURN
END
C**************************************************************
SUBROUTINE BH_PPTCU(DBHOB,HTTOT,TCUFT)
IMPLICIT NONE
REAL DBHOB,HTTOT, TCUFT
REAL a0,b0,c0
C Total cubic volume equation vol=a*DBH^b*THT^c
C The coefficients was developed from sample trees collected in
C Black Hills volume and biomass study in 2022
a0 = 0.003573
b0 = 1.89865505
c0 = 0.95409984
TCUFT = a0*DBHOB**b0*HTTOT**c0
RETURN
END
C**************************************************************
SUBROUTINE GetRatioCoef(a,b)
IMPLICIT NONE
C Coefficients for the ratio of volume to a given height to total vol using the method
C developed by Phil Radtke from Virginia Tech for Black Hills
REAL a,b
a = 2.187093
b = 0.9399898
END
C**************************************************************
SUBROUTINE BH_PPRATIO(HTTOT,HT2,R)
IMPLICIT NONE
REAL HTTOT, HT2, R, X
REAL a,b
C Calculate the ratio of volume to a given height to total vol using the method
C developed by Phil Radtke from Virginia Tech for Black Hills
CALL GetRatioCoef(a,b)
X = HT2/HTTOT
R = (1.0-(1.0-X)**a)**b
RETURN
END
C**************************************************************
C Calculate height to a given TOPD
SUBROUTINE GetHT2TOPD(DBHOB,HTTOT,TOPD,MHT,HTLOW)
IMPLICIT NONE
REAL DBHOB, HTTOT,TOPD,MHT,HTLOW
REAL R,low,hi,diff,X,a,b,TCUFT,mid
INTEGER loopcnt
! Get total cuft vol
CALL BH_PPTCU(DBHOB,HTTOT,TCUFT)
C Ratio coefficients developed by Phil Radtke from Virginia Tech
CALL GetRatioCoef(a,b)
CALL GetHT2TOPD2(TCUFT,a,b,HTTOT,TOPD,MHT,HTLOW)
RETURN
END
C**************************************************************
C Calculate height to a given TOPD
SUBROUTINE GetHT2TOPD2(TCUFT,a,b,HTTOT,TOPD,MHT,HTLOW)
IMPLICIT NONE
REAL HTTOT,TOPD,MHT,HTLOW
REAL low,hi,diff,X,a,b,TCUFT,mid
INTEGER loopcnt
low = HTLOW
hi = HTTOT
diff = 1.0
loopcnt = 0
DO WHILE (ABS(diff).GT.0.01)
mid = (low+hi)/2
X = mid/HTTOT
diff = TOPD - ((TCUFT/0.005454154/HTTOT*a*b*
+ (1-X)**(a-1)*(1-(1-X)**a)**(b-1)))**0.5
IF(ABS(diff).LT.0.05) THEN
EXIT
ENDIF
IF(diff.LT.0.0)THEN
low = mid
ELSE
hi = mid
ENDIF
loopcnt = loopcnt +1
IF(loopcnt.GT.1000) EXIT
ENDDO
MHT = mid
RETURN
END
C**************************************************************
C Calculate DIB at a given height HT2
SUBROUTINE GetHTDIB(DBHOB,THT,HT2,DIB)
IMPLICIT NONE
REAL DBHOB,HT2,DIB,a,b,TCUFT,THT
CALL BH_PPTCU(DBHOB,THT,TCUFT)
CALL GetRatioCoef(a,b)
CALL GetHTDIB2(TCUFT,a,b,THT,HT2,DIB)
RETURN
END
C**************************************************************
C Calculate DIB at a given height HT2
SUBROUTINE GetHTDIB2(TCUFT,a,b,THT,HT2,DIB)
IMPLICIT NONE
REAL HT2,DIB,a,b,TCUFT,THT
DIB=SQRT((TCUFT/ 0.005454 / THT) * (a * b *
> (1-HT2/THT)**(a-1)*(1-(1 - HT2/THT)**a)**(b-1)))
RETURN
END
C**************************************************************
C Calculate LOGDIA, LOGVOL, BOLHT and VOL
SUBROUTINE CalcLOGVOL(LOGST,NUMSEG,DIBL,HT2,TCUFT,TRIM,THT,
+ LOGLEN,LOGDIA,LOGVOL,BOLHT,VOL,COR)
IMPLICIT NONE
INTEGER LOGST,NUMSEG,I
REAL DIBL,HT2,TCUFT,TRIM,DIB,a,b,THT,DIBS,LOGCV,LENTH,LOGV,BFINT
REAL LOGLEN(20),LOGVOL(7,20),LOGDIA(21,3),BOLHT(21),VOL(15)
CHARACTER*1 COR
CALL GetRatioCoef(a,b)
DO 500 I=1+LOGST,NUMSEG+LOGST
HT2=HT2+TRIM+LOGLEN(I)
CALL GetHTDIB2(TCUFT,a,b,THT,HT2,DIB)
LOGDIA(I+1,2)= DIB
LOGDIA(I+1,1)=NINT(DIB)
BOLHT(I+1) = HT2
DIBS = LOGDIA(I+1,1)
LOGCV = .00272708*(DIBL*DIBL+DIBS*DIBS)*LOGLEN(I)
LOGVOL(4,I) = ANINT(LOGCV*10)/10
DIBL = LOGDIA(I+1,1)
!Calculate boardfoot volume
DIB=LOGDIA(I+1,1)
LENTH=LOGLEN(I)
CALL SCRIB (DIB,LENTH,COR,LOGV)
if(cor.eq.'Y') then
LOGVOL(1,I) = LOGV * 10
else
LOGVOL(1,I) = ANINT(LOGV)
endif
CALL INTL14(DIB,LENTH,BFINT)
LOGVOL(7,I) = BFINT
IF(LOGST.GT.0) THEN
VOL(7)=VOL(7)+LOGVOL(4,I)
VOL(12) = VOL(12) + LOGVOL(1,I)
ELSE
VOL(4)=VOL(4)+LOGVOL(4,I)
VOL(2) = VOL(2) + LOGVOL(1,I)
VOL(10) = VOL(10) + BFINT
ENDIF
500 CONTINUE
RETURN
END
C********BOARD FOOT VOLUME EQUATION NUMBERS********
C-- 201 = ASPEN RM-232 - 6" TOP - PAGE 6
C-- 202 = LODGEPOLE PINE RESEARCH NOTE RM-157 - 6" TOP
C-- 203 = PONDEROSA PINE BLACK HILLS PROSSER - 6" TOP
C-- 204 = PONDEROSA PINE FRONT RANGE RM-218 - 6" TOP - PAGE 7
C-- 207 = ENGELMANN SPRUCE RM-95 - 6" TOP - PAGE 8
C-- 212 = PONDEROSA PINE BLACK HILLS MYERS RM-8-8" TOP - PG 8
C-- FOR LIMBER PINE USE EQUATION 204
C-- FOR SOUTHWEST PONDEROSA PINE USE EQUATION 204
C-- FOR DOUGLAS FIR USE EQUATION 207
C-- FOR TRUE FIRS USE EQUATION 207
C********CUBIC FOOT VOLUME EQUATION NUMBERS********
C-- 201 = ASPEN RM-232 - 4" TOP - PAGE 4
C-- 202 = LODGEPOLE PINE RM-6 - 4" TOP - PAGE 6
C-- 203 = PONDEROSA PINE MYERS RM-8-4" TOP
C-- 204 = PONDEROSA PINE FRONT RANGE RM-218 - 4" TOP - PAGE 5
C-- 207 = ENGELMANN SPRUCE RM-95 - 4" TOP - PAGE 6
C-- 212 = PONDEROSA PINE BLACK HILLS MYERS RM-8-4" TOP - PG 6
C-- FOR LIMBER PINE USE EQUATION 204
C-- FOR SOUTHWEST PONDEROSA PINE USE EQUATION 204
C-- FOR DOUGLAS FIR USE EQUATION 207
C-- FOR TRUE FIRS USE EQUATION 207
C*****CUBIC FOOT BIOMASS GROUND TO TIP VOLUME EQUATION NUMBERS
C-- 221 = ASPEN RM-232 - PAGE 3
C-- 222 = LODGEPOLE PINE RESEARCH NOTE RM-6 - PAGE 5
C-- 223 = PONDEROSA PINE BLACK HILLS MYERS RM-8 - PAGE 5
C-- 224 = PONDEROSA PINE FRONT RANGE RM-218 - PAGE 4
C-- 227 = ENGELMANN SPRUCE RM-95 - PAGE 5
C-- FOR LIMBER PINE USE EQUATION 204
C-- FOR SOUTHWEST PONDEROSA PINE USE EQUATION 204
C-- FOR DOUGLAS FIR USE EQUATION 207
C-- FOR TRUE FIRS USE EQUATION 207
C-- HTTOT - REAL - **TREE HEIGHT IN FT. FROM A 1 FOOT STUMP**