DESCRIPTION
i.biomass calculates the biomass growth for a day after [1][2].
Input:
- fPAR, the modified Photosynthetic Active Radiation for crops.
- Light Use Efficiency [0.0-1.0], in Uzbekistan cotton is at 1.9 most of the time.
- Latitude [0.0-90.0], from r.latlong.
- DOY [1-366].
- Transmissivity of the atmosphere single-way [0.0-1.0], mostly around 0.7+ in clear sky.
- 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.
SEE ALSO
i.eb.evapfr,
r.latlong,
r.sun
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.
AUTHOR
Yann Chemin, Bec de Mortagne, France
Last changed: $Date$