E_Papadakis: Lake evaporation (Papadakis method)

In jmerc13/LakeIsodrology: Lake isotope hydrology

Description

E_Papadakis returns an estimate of evaporation, E (mm day^{-1}), based on data related to saturation vapor pressure and number of days in a month.

Usage

E_Papadakis(esmax, esmin, day, a = 0.5625, b = 2, conv = 10)

Arguments

esmax	Maximum saturation vapor pressure for a given day, e_{s,max} (kPa).
esmin	Minimum saturation vapor pressure for a given day, e_{s,min} (kPa).
day	Number of days in a month, day (days).
a	An emperical coefficient, assumed to be 0.5625.
b	An emperical coefficient, assumed to be 2.
conv	A multiplier that converts base units to mm/day. It is assumed to be 10, but will need to be adjust for alternative units.

Details

E is determined by (Papadakis 1965, McGuinness and Bordne 1972, Rosenberry et al. 2007):

E = a (e_{s,max} - [e_{s,min} - b]) \bigg(\frac{10}{day} \bigg)

Papadakis J. 1965. Potential evapotranspiration. Bueuos Aires, 54 pp.

McGuinness JL, Bordne EF. 1972. A comparison of lysimeter-derived potential evapotranspiration with computed values. Technical Bulletin 1452, US Department of Agriculture Agricultural Research Service, Washington, DC.

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.