GRASS logo

NAME - Computes evapotranspiration calculation modified or original Hargreaves formulation, 2001.


imagery, evapotranspiration

SYNOPSIS --help [-zhs] netradiation_diurnal=name average_temperature=name minimum_temperature=name maximum_temperature=name [precipitation=name] output=name [--overwrite] [--help] [--verbose] [--quiet] [--ui]


Set negative ETa to zero
Use original Hargreaves (1985)
Use Hargreaves-Samani (1985)
Allow output files to overwrite existing files
Print usage summary
Verbose module output
Quiet module output
Force launching GUI dialog


netradiation_diurnal=name [required]
Name of input diurnal net radiation raster map [W/m2/d]
average_temperature=name [required]
Name of input average air temperature raster map [C]
minimum_temperature=name [required]
Name of input minimum air temperature raster map [C]
maximum_temperature=name [required]
Name of input maximum air temperature raster map [C]
Name of precipitation raster map [mm/month]
Disabled for original Hargreaves (1985)
output=name [required]
Name for output raster map [mm/d]

Table of contents

DESCRIPTION calculates the reference evapotranspiration (ET) after Hargreaves et al. (1985), Hargreaves and Samani (1985) and the Modified Hargreaves version found in Droogers and Allen (2002).

SEE ALSO,, i.evapo.time, r.sun



Yann Chemin, GRASS Development team, 2007-2016

Last changed: $Date: 2016-01-27 14:51:14 -0800 (Wed, 27 Jan 2016) $


Available at: source code (history)

Main index | Imagery index | Topics index | Keywords index | Graphical index | Full index

© 2003-2017 GRASS Development Team, GRASS GIS 7.2.3svn Reference Manual