i.biomass1grass
Computes biomass growth, precursor of crop yield calculation.
Usage
i.biomass
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]
Keywords
imagery, biomass, FPAR, yield
Overview
i.biomass calculates the biomass growth for a day after [1][2]. Input:
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fPAR, the modified Photosynthetic Active Radiation for crops.
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Light Use Efficiency [0.0-1.0], in Uzbekistan cotton is at 1.9 most of the time.
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Latitude [0.0-90.0], from r.latlong.
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DOY [1-366].
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Transmissivity of the atmosphere single-way [0.0-1.0], mostly around 0.7+ in clear sky.
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Water availability [0.0-1.0], possibly using direct output from i.eb.evapfr.
Notes
i.biomass can use the output of i.eb.evapfr directly as water availability input.
Todo
Remove Latitude, DOY and Tsw from input and replace with a raster input compatible with r.sun output.
References
[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.
Source code
Available at: i.biomass source code (history)
Accessed: Monday Feb 24 17:51:31 2025
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Releases
5 releases since Debian 9 (Stretch); the text changed 4 times.