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       i.eb.evapfr  - Computes evaporative fraction and root zone soil moisture.


       imagery, energy balance, soil moisture, evaporative fraction, SEBAL


       i.eb.evapfr --help
       i.eb.evapfr     [-m]     netradiation=name     soilheatflux=name     sensibleheatflux=name
       evaporativefraction=name   [soilmoisture=name]    [--overwrite]    [--help]    [--verbose]
       [--quiet]  [--ui]

           Root zone soil moisture output (Makin, Molden and Bastiaanssen, 2001)

           Allow output files to overwrite existing files

           Print usage summary

           Verbose module output

           Quiet module output

           Force launching GUI dialog

       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

           Name for output root zone soil moisture raster map


       i.eb.evapfr  calculates  the  evaporative  fraction  after  Bastiaanssen  1995.  The  main
       implementation follows Alexandridis et al.  (2009). The module  takes  as  input  the  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 Bastiaanssen, et al. (2000).


        i.eb.hsebal01, i.eb.netrad, i.eb.soilheatflux, r.sun


       Bastiaanssen, W.G.M., 1995.  Estimation of Land surface parameters by remote sensing under
       clear-sky conditions. PhD thesis,  Wageningen  University,  Wageningen,  The  Netherlands.

       Bastiaanssen,  W.G.M.,  Molden,  D.J.,  Makin,  I.W.,  2000.  Remote sensing for irrigated
       agriculture:  examples  from  research  and  possible  applications.  Agricultural   water
       management 46.2: 137-155.

       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.

       Alexandridis T.K., Cherif I., Chemin Y., Silleos N.G., Stavrinos E., Zalidis  G.C.,  2009.
       Integrated  methodology  for  estimating  water  use  in Mediterranean agricultural areas.
       Remote Sensing. 1, 445-465.  (PDF)

       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: 2016-06-02 20:19:40 +0200 (Thu, 02 Jun 2016) $


       Available at: i.eb.evapfr source code (history)

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