i.eb.evapfr.1grass man page

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

Keywords

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

Synopsis

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

Flags

-m

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

--overwrite

Allow output files to overwrite existing files

--help

Print usage summary

--verbose

Verbose module output

--quiet

Quiet module output

--ui

Force launching GUI dialog

Parameters

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

soilmoisture=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), 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

References

[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)

Author

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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