E_Hamon: Lake evaporation (Hamon method)
In jmerc13/LakeIsodrology: Lake isotope hydrology

E_Hamon provides an estimate of daily evaporation, E (mm day^{-1}) using data related to day length.

1	E_Hamon(D, ps, a = 0.55, conv = 25.4)

`D`	Hours of daylight, D (hrs).
`ps`	saturation vapor density, ρ_{s} (g m^{-3}).
`a`	An empirical coefficient, assumed to be 0.55.
`conv`	A multiplier that converts base units to mm/day. It is assumed to be 25.4, but will need to be adjust for alternative units.

Daily evaporation is determined via (Hamon 1961, Rosenberry et al. 2007):

a \bigg(\frac{D}{12}\bigg)^{2} \frac{ρ_{s}}{100} \cdot 25.4

Hamon, WR. 1961. Estimating potential evapotranspiration. Proc. Amer. Soc. civ. Engrs. 87, 107–120.

Rosenberry DO, Winter TC, Buso DC, Likens GE. 2007. Comparison of 15 evaporation methods applied to a small mountain lake in the northeastern USA. Journal of Hydrology 340 (3–4): 149–166. DOI: 10.1016/j.jhydrol.2007.03.018.

jmerc13/LakeIsodrology documentation built on May 5, 2019, 5:52 p.m.