E_Makkink: Lake evaporation (Makkink method)

In jmerc13/LakeIsodrology: Lake isotope hydrology

Description

E_Makkink returns the evaporation rate, E (mm/day), given the slope of the saturation vapor pressure curve, psychrometric constant, and solar radiation.

Usage

E_Makkink(del, gamma, Qs, L = 2.47, rho = 998, a = 52.6, b = 0.12)

Arguments

del	Slope of the saturation vapor pressure curve, Δ (kPa C^{-1}).
gamma	Psychrometric constant, γ (kPa C^{-1}).
Qs	Solar radiation, Q_{s} (W m^{-2}).
L	Latent heat of vaporization, λ_{v} (MJ kg^{-1}). Assumed to be 2.47.
rho	Density of water at a particular temperature, ρ (kg m^{-3}). Assumed to be 988 (density at 20 C).
a	Empirical parameter, assumed to be 52.6.
b	Empirical parameter, assumed to be 0.12.

Details

Daily evaporation is estimate by (Makkink 1957, McGuinness and Bordne 1972, Rosenberry et al. 2007):

E = \bigg( \bigg(a \frac{Δ}{Δ + γ} \frac{Q_{s}}{λ_{v} ρ}\bigg) - b \bigg)

Makkink, GF. 1957. Testing the Penman formula by means of lysimeters. J. Inst. Water Eng 11(3): 277-288.

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.