i.biomass.1grass - Man Page

Computes biomass growth, precursor of crop yield calculation.


imagery, biomass, FPAR, yield


i.biomass --help
i.biomass fpar=name lightuse_efficiency=name latitude=name dayofyear=name transmissivity_singleway=name water_availability=name output=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]



Allow output files to overwrite existing files


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


fpar=name [required]

Name of fPAR raster map

lightuse_efficiency=name [required]

Name of light use efficiency raster map (UZB:cotton=1.9)

latitude=name [required]

Name of degree latitude raster map [dd.ddd]

dayofyear=name [required]

Name of Day of Year raster map [1-366]

transmissivity_singleway=name [required]

Name of single-way transmissivity raster map [0.0-1.0]

water_availability=name [required]

Value of water availability raster map [0.0-1.0]

output=name [required]

Name for output daily biomass growth raster map [kg/ha/d]


i.biomass calculates the biomass growth for a day after [1][2]. Input:


i.biomass can use the output of i.eb.evapfr directly as water availability input.


Remove Latitude, DOY and Tsw from input and replace with a raster input compatible with r.sun output.


[1] Bastiaanssen, W.G.M., Ali, S., 2002. A new crop yield forecasting model based on satellite measurements applied across the Indus Basin, Pakistan. Agriculture, Ecosystems and Environment, 94(3):321-340. (PDF)

[2] Chemin, Y., Platonov, A., Abdullaev, I., Ul-Hassan, M. 2005. Supplementing farm level water productivity assessment by remote sensing in transition economies. Water International. 30(4):513-521.

See Also

i.eb.evapfr, r.latlong, r.sun


Yann Chemin, Bec de Mortagne, France

Source Code

Available at: i.biomass source code (history)

Accessed: Tuesday Mar 19 11:02:28 2024

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