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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