1i.eb.eta(1) GRASS GIS User's Manual i.eb.eta(1)
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6 i.eb.eta - Actual evapotranspiration for diurnal period (Bastiaanssen,
7 1995).
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10 imagery, energy balance, actual evapotranspiration, SEBAL
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13 i.eb.eta
14 i.eb.eta --help
15 i.eb.eta netradiationdiurnal=name evaporativefraction=name tempera‐
16 ture=name output=name [--overwrite] [--help] [--verbose] [--quiet]
17 [--ui]
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19 Flags:
20 --overwrite
21 Allow output files to overwrite existing files
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23 --help
24 Print usage summary
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26 --verbose
27 Verbose module output
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29 --quiet
30 Quiet module output
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32 --ui
33 Force launching GUI dialog
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35 Parameters:
36 netradiationdiurnal=name [required]
37 Name of the diurnal net radiation map [W/m2]
38 Default: rnetday
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40 evaporativefraction=name [required]
41 Name of the evaporative fraction map [-]
42 Default: evapfr
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44 temperature=name [required]
45 Name of the surface skin temperature [K]
46 Default: tempk
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48 output=name [required]
49 Name of the output actual evapotranspiration layer [mm/d]
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52 i.eb.eta calculates the actual evapotranspiration (ETa ; mm/d) for di‐
53 urnal period after [1], implemented in [3]. It takes input of Diurnal
54 Net Radiation (see r.sun), evaporative fraction (see i.eb.evapfr) and
55 surface skin temperature.
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58 Full ETa processing will need those:
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60 • i.vi, i.albedo, r.latlong, i.emissivity
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62 • i.evapo.potrad (GRASS Addon)
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64 • i.eb.netrad, i.eb.soilheatflux, i.eb.hsebal01
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66 • i.eb.evapfr, i.eb.eta
67 (for time integration: i.evapo.time_integration)
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69 For more details on the algorithms see [1][2][3][4].
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72 [1] Bastiaanssen, W.G.M., 1995. Estimation of Land surface parameters
73 by remote sensing under clear-sky conditions. PhD thesis, Wageningen
74 University, Wageningen, The Netherlands. (PDF)
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76 [2] Chemin Y., Alexandridis T.A., 2001. Improving spatial resolution of
77 ET seasonal for irrigated rice in Zhanghe, China. Asian Journal of
78 Geoinformatics. 5(1):3-11,2004.
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80 [3] Alexandridis T.K., Cherif I., Chemin Y., Silleos N.G., Stavrinos
81 E., Zalidis G.C. Integrated methodology for estimating water use in
82 Mediterranean agricultural areas. Remote Sensing. 2009, 1, 445-465.
83 (PDF)
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85 [4] Chemin, Y., 2012. A Distributed Benchmarking Framework for Actual
86 ET Models, in: Irmak, A. (Ed.), Evapotranspiration - Remote Sensing and
87 Modeling. InTech. (PDF)
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90 r.sun, i.eb.evapfr, i.eb.netrad
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93 Yann Chemin, Asian Institute of Technology, Thailand
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96 Available at: i.eb.eta source code (history)
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98 Accessed: Saturday Oct 28 18:19:00 2023
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100 Main index | Imagery index | Topics index | Keywords index | Graphical
101 index | Full index
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103 © 2003-2023 GRASS Development Team, GRASS GIS 8.3.1 Reference Manual
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107GRASS 8.3.1 i.eb.eta(1)