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)

4.2 Classical VIC

Chapter 3.1

Section

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.