Chapter 4 Model
4.1 Report 16.4
| PROCESS | MODULE |
|---|---|
| ReferenceET | ReferenceET.Hargreaves | ReferenceET.Linacre | ReferenceET.PenMon |
| ActualET | ActualET.Gr4j | ActualET.Vic |
| SNOW | SNOW.17 | SNOW.Ddf |
| RUNOFF | RUNOFF.Gr4j | RUNOFF.OIER | RUNOFF.SER | RUNOFF.Vic | RUNOFF.VM |
| ROUTE | ROUTE.G2RES | ROUTE.Gr4j |
4.1.1 Snowmelt
Type 1 Temperature
\[SM=(T-T_s)\times c_f\] where \(SM\) is the snowmelt [mm] (of water), \(cf\) is the factor of melt [mm/Cel d], T is the mean air temperature [Cel], and \(T_s\) is a threshold temperature value [Cel].
Type 2 Energy (radition)
\[SM=\frac{ISR\times(1-\alpha)+C_0+C_1\times T}{\rho \times L_f}\] where \(\alpha\) is the snow albedo, \(ISR\) is the incoming shortwave radiation [W/m2], \(C_0\) and \(C_1\) are factors accounting for the temperature-dependent energy fluxes ([W/m2] and [W/m2Cel], respectively), \(\rho\) is the density of snow [kg/m3], and \(L_f\) is the fusion latent heat [J/kg].
More information see the literarure (Troin et al. 2018)
4.3 GR4J
References
Troin, Magali, Richard Arsenault, Jean-Luc Martel, and François Brissette. 2018. “Uncertainty of Hydrological Model Components in Climate Change Studies over Two Nordic Quebec Catchments.” Journal of Hydrometeorology 19 (1): 27–46. https://doi.org/10.1175/JHM-D-17-0002.1.