Description Usage Arguments Details
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.
1 | E_Papadakis(esmax, esmin, day, a = 0.5625, b = 2, conv = 10)
|
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. |
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.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.