Description Usage Arguments Value References
View source: R/heat_functions.R
Calculates the time constant (day) based on McJannet et al. (2008) Equation 5 and de Bruin (1982) Equation 4, as presented in McMahon et al. (2013) S11.29.
1 | time_const(loc, lake, weather, rho_w = 997.9, cw = 0.00419, SBc = 4.903e-09)
|
loc |
a list with location information that includes:
|
lake |
A list with lake data. Defaults to NULL, but for McJannet lake evaporation calculations, should include:
|
weather |
a list with weather data that includes:
|
rho_w |
density of water (kg/m^3), defaults to 997.9 kg/m^3 at 20 deg C |
cw |
specific heat of water (MJ/kg/K), defaults to 0.00419 |
SBc |
Stefan-Boltzman constant (MJ/m^2/day). Defaults to 4.903e-9 MJ/m^2/day. |
Ctime |
time constant (day) |
McMahon, T. A., Peel, M. C., Lowe, L., Srikanthan, R., and McVicar, T. R.: Estimating actual, potential, reference crop and pan evaporation using standard meteorological data: a pragmatic synthesis, Hydrol. Earth Syst. Sci., 17, 1331–1363, https://doi.org/10.5194/hess-17-1331-2013, 2013.
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