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错误出在这个sub的第一行
SUBROUTINE CANOPY (DOY, MAXHT, RELHT, MAXLAI, MXMAI,RELLAI,RELMAI,
* SNOW,SNODEN, MXRTLN, MXKPL, CS, DENSEF, HEIGHT, LAI, SAI,
* MAI, RTLEN, RPLANT)
C canopy parameters
IMPLICIT NONE
C input
INTEGER DOY ! day of year (first day of DFILE and run)"
REAL MAXHT ! maximum height for the year, m, minimum of 0.01 m
REAL RELHT(*) ! ten pairs of DOY and relative canopy height
REAL MAXLAI ! maximum projected leaf area index for the year,m2/m2
REAL MXMAI
REAL RELLAI(*) ! ten pairs of DOY and relative LAI
REAL RELMAI
REAL SNOW ! water equivalent of snow on the ground, mm
REAL SNODEN ! snow density, mm/mm
REAL MXRTLN ! maximum root length per unit land area, m/m2
REAL MXKPL ! maximum plant conductivity, (mm/d)/MPa
REAL CS ! ratio of projected SAI to canopy height, m-1
REAL DENSEF ! density factor
C output
REAL HEIGHT ! canopy height above any snow, m, minimum of 0.01 m
REAL LAI ! leaf area index, m2/m2, minimum of 0.00001
REAL SAI ! stem area index, m2/m2
REAL MAI
REAL RTLEN ! root length per unit land area, m/m2
REAL RPLANT ! plant resistivity to water flow, MPa d/mm
C local
REAL SNODEP ! snow depth
REAL HNOSNO ! height of canopy without snow
REAL HSNO ! height of canopy above snow
REAL RATIO ! fraction of canopy above snow
REAL RELHIT ! RELHT for DOY
REAL KPL ! plant conductivity, mm d-1 MPa-1
C intrinsic
C REAL, MAX
C external functions needed
REAL INTERP
C
RELHIT = INTERP(10, RELHT, REAL(DOY))
SNODEP = .001 * SNOW / SNODEN
HNOSNO = MAX(.01, RELHIT * MAXHT)
HSNO = MAX(0., HNOSNO - SNODEP)
RATIO = HSNO / HNOSNO
HEIGHT = MAX(.01, HSNO)
C
LAI = RATIO * DENSEF * INTERP(10, RELLAI, REAL(DOY)) * MAXLAI
SAI = DENSEF * CS * HEIGHT
MAI = INTERP(10, RELMAI, REAL(DOY)) * MXMAI
IF (LAI .LT. .00001) LAI = .00001
C
RTLEN = DENSEF * RELHIT * MXRTLN
KPL = DENSEF * RELHIT * MXKPL
IF (KPL .LT. 1E-08) KPL = 1E-08
RPLANT = 1. / KPL
C
END
call 结婚(赵又廷,高圆圆)
call 结婚(张三,李四)
subroutine 结婚(男方,女方)
男方和女方领结婚证
男方和女方办酒席
end subroutine 结婚
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