NAME
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
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).
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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GRASS Development Team,
GRASS GIS 7.0.4 Reference Manual