i.eb.evapfr.1grass man page

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


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


i.eb.evapfr --help
i.eb.evapfr [-m] netradiation=name soilheatflux=name sensibleheatflux=name evaporativefraction=name  [soilmoisture=name]   [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]



Root zone soil moisture output (Makin, Molden and Bastiaanssen, 2001)


Allow output files to overwrite existing files


Print usage summary


Verbose module output


Quiet module output


Force launching GUI dialog


netradiation=name [required]

Name of Net Radiation raster map [W/m2]

soilheatflux=name [required]

Name of soil heat flux raster map [W/m2]

sensibleheatflux=name [required]

Name of sensible heat flux raster map [W/m2]

evaporativefraction=name [required]

Name for output evaporative fraction raster map


Name for output root zone soil moisture raster map


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), soil heat flux (see i.eb.soilheatflux) and sensible heat flux (see i.eb.hsebal01). A flag adds a root zone empirical soil moisture output from the article of Makin, Molden and Bastiaanssen (2001).

See Also

r.sun, i.eb.soilheatflux, i.eb.hsebal01


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

[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, 1, 445-465. (PDF)

[4] Chemin, Y., 2012. A Distributed Benchmarking Framework for Actual ET Models, in: Irmak, A. (Ed.), Evapotranspiration - Remote Sensing and Modeling. InTech. (PDF)


Yann Chemin, Asian Institute of Technology, Thailand

Last changed: $Date: 2015-01-25 18:56:33 +0100 (Sun, 25 Jan 2015) $

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