1i.evapo.mh(1)               GRASS GIS User's Manual              i.evapo.mh(1)
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NAME

6       i.evapo.mh  - Computes evapotranspiration calculation modified or orig‐
7       inal Hargreaves formulation, 2001.
8

KEYWORDS

10       imagery, evapotranspiration
11

SYNOPSIS

13       i.evapo.mh
14       i.evapo.mh --help
15       i.evapo.mh  [-zhs]  netradiation_diurnal=name  average_temperature=name
16       minimum_temperature=name maximum_temperature=name  [precipitation=name]
17       output=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]
18
19   Flags:
20       -z
21           Set negative ETa to zero
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23       -h
24           Use original Hargreaves (1985)
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26       -s
27           Use Hargreaves-Samani (1985)
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29       --overwrite
30           Allow output files to overwrite existing files
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32       --help
33           Print usage summary
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35       --verbose
36           Verbose module output
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38       --quiet
39           Quiet module output
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41       --ui
42           Force launching GUI dialog
43
44   Parameters:
45       netradiation_diurnal=name [required]
46           Name of input diurnal net radiation raster map [W/m2/d]
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48       average_temperature=name [required]
49           Name of input average air temperature raster map [C]
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51       minimum_temperature=name [required]
52           Name of input minimum air temperature raster map [C]
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54       maximum_temperature=name [required]
55           Name of input maximum air temperature raster map [C]
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57       precipitation=name
58           Name of precipitation raster map [mm/month]
59           Disabled for original Hargreaves (1985)
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61       output=name [required]
62           Name for output raster map [mm/d]
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DESCRIPTION

65       i.evapo.mh calculates the reference evapotranspiration (ET) after Harg‐
66       reaves  et  al.  (1985),  Hargreaves and Samani (1985) and the Modified
67       Hargreaves version found in Droogers and Allen (2002).
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REFERENCES

70           •   Hargreaves GL, Hargreaves GH, Riley JP, 1985. Agricultural ben‐
71               efits  for  Senegal  River  Basin.  Journal  of  Irrigation and
72               Drainange Engineering, ASCE, 111(2):113-124.
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74           •   Droogers P, Allen RG, 2002. Towards a simplified global  refer‐
75               ence evapotranspiration equation. Irrigation Science.
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77           •   Droogers,  P.,  Allen RG. 2002. Estimating reference evapotran‐
78               spiration under  inaccurate  data  conditions.  Irrigation  and
79               Drainage Systems 16: 33-45.
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81           •   Hargreaves  GH, Samani ZA, 1985. Reference crop evapotranspira‐
82               tion from ambient air temperature. American Society of Agricul‐
83               tural  Engineers  (Microfiche  collection)(USA).  no. fiche no.
84               85-2517.
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SEE ALSO

87        i.evapo.pt, i.evapo.pm, i.evapo.time, r.sun
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AUTHOR

90       Yann Chemin, GRASS Development team, 2007-2016
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SOURCE CODE

93       Available at: i.evapo.mh source code (history)
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95       Accessed: Saturday Jan 21 21:16:36 2023
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97       Main index | Imagery index | Topics index | Keywords index |  Graphical
98       index | Full index
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100       © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
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104GRASS 8.2.1                                                      i.evapo.mh(1)
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