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NAME

i.eb.evapfr - Computes evaporative fraction (Bastiaanssen, 1995) and root zone soil moisture (Makin, Molden and Bastiaanssen, 2001)

KEYWORDS

imagery, evaporative fraction, soil moisture, energy balance, SEBAL

SYNOPSIS

i.eb.evapfr
i.eb.evapfr help
i.eb.evapfr [-m] rnet=name g0=name h0=name evapfr=name [theta=name] [--overwrite] [--verbose] [--quiet]

Flags:

-m
Root zone soil moisture output (Makin, Molden and Bastiaanssen, 2001)
--overwrite
Allow output files to overwrite existing files
--verbose
Verbose module output
--quiet
Quiet module output

Parameters:

rnet=name
Name of Net Radiation raster map [W/m2]
g0=name
Name of soil heat flux raster map [W/m2]
h0=name
Name of sensible heat flux raster map [W/m2]
evapfr=name
Name for output evaporative fraction raster map
theta=name
Name for output root zone soil moisture raster map

DESCRIPTION

i.eb.evapfr calculates the evaporative fraction after [1]. Main implementation in [3]. It takes input of Net Radiation (see r.sun, i.eb.netrad (grass-addons)), soil heat flux (see i.eb.g0) and sensible heat flux (see i.eb.h_SEBAL01). A flag adds a root zone empirical soil moisture output from the article of Makin, Molden and Bastiaanssen (2001).

NOTES

TODO

SEE ALSO

r.sun
i.eb.soilheatflux
i.eb.h_SEBAL01

REFERENCES

[1] Bastiaanssen, W.G.M., 1995. Estimation of Land surface paramters by remote sensing under clear-sky conditions. PhD thesis, Wageningen University, Wageningen, The Netherlands.

[2] Chemin Y., Alexandridis T.A., 2001. Improving spatial resolution of ET seasonal for irrigated rice in Zhanghe, China. Asian Journal of Geoinformatics. 5(1):3-11,2004.

[3] Alexandridis T.K., Cherif I., Chemin Y., Silleos N.G., Stavrinos E., Zalidis G.C. Integrated methodology for estimating water use in Mediterranean agricultural areas. Remote Sensing. -(-):,2009. (submitted))

AUTHORS

Yann Chemin, Asian Institute of Technology, Thailand

Last changed: $Date: 2009-06-19 08:40:23 -0700 (Fri, 19 Jun 2009) $


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