## DESCRIPTION

i.evapo.MH Calculates the reference ET after Hargreaves (1985) and Modified Hargreaves (2001).

## SEE ALSO

i.evapo.pt, i.evapo.pm, i.evapo.potrad, r.sun

## REFERENCES

Hargreaves GL, Hargreaves GH, Riley JP, 1985. Agricultural benefits for Senegal River Basin. Journal of Irrigation and Drainange Engineering, ASCE, 111(2):113-124.

Droogers P, Allen RG, 2002. Towards a simplified global reference evapotranspiration equation. Irrigation Science.

Droogers, P., and R.G. Allen. 2002. Estimating reference evapotranspiration under inaccurate data conditions. Irrigation and Drainage Systems 16: 33-45.

Hargreaves and Samani, 1985.

## AUTHORS

Yann Chemin, GRASS Development team, 2007-2011

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