Geografic-Information-System/imagery/i.biomass/i.biomass.html

<H2>DESCRIPTION</H2>

<EM>i.biomass</EM> Calculates the biomass growth for a day after [1][2]. 

Input:
<ul>
 <li>fPAR, the modified Photosynthetic Active Radiation for crops.
 <li>Light Use Efficiency [0.0-1.0], in Uzbekistan cotton is at 1.9 most of the time.
 <li>Latitude [0.0-90.0], from i.latlong.
 <li>DOY [1-366].
 <li>Transmissivity of the Atmosphere single-way [0.0-1.0], mostly around 0.7+ in clear sky.
 <li>Water availability [0.0-1.0], possibly using direct output from i.eb.evapfr.
</ul>

<H2>NOTES</H2>
It can use the output of i.eb.evapfr directly as water availability input.

<H2>TODO</H2>
remove Latitude, DOY and Tsw from input and replace with a raster input compatible with r.sun output.

<H2>SEE ALSO</H2>

<em>
<A HREF="i.eb.evapfr">i.eb.evapfr</A><br>
</em>

<H2>REFERENCES</H2>

  <p>[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. 

  <p>[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.


<H2>AUTHORS</H2>

Yann Chemin, Bec de Mortagne, France<BR>


<p>
<i>Last changed: $Date$</i>