i.eb.etagrass - Online in the Cloud

PROGRAM:

NAME

i.eb.eta - Actual evapotranspiration for diurnal period (Bastiaanssen, 1995).

KEYWORDS

imagery, energy balance, actual evapotranspiration, SEBAL

SYNOPSIS

i.eb.eta
i.eb.eta --help
i.eb.eta netradiationdiurnal=name evaporativefraction=name temperature=name output=name
[--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:
--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:
netradiationdiurnal=name [required]
Name of the diurnal net radiation map [W/m2]
Default: rnetday

evaporativefraction=name [required]
Name of the evaporative fraction map [-]
Default: evapfr

temperature=name [required]
Name of the surface skin temperature [K]
Default: tempk

output=name [required]
Name of the output actual evapotranspiration layer [mm/d]

DESCRIPTION

i.eb.eta calculates the actual evapotranspiration (ETa ; mm/d) for diurnal period after
[1], implemented in [3]. It takes input of Diurnal Net Radiation (see r.sun), evaporative
fraction (see i.eb.evapfr) and surface skin temperature.

NOTES

Full ETa processing will need those:

· i.vi, i.albedo, r.latlong, i.emissivity

· i.evapo.potrad (GRASS Addon)

· i.eb.netrad, i.eb.soilheatflux, i.eb.hsebal01

· i.eb.evapfr, i.eb.eta
(for time integration: i.evapo.time_integration)

For more details on the algorithms see [1][2][3][4].

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