Table 3.

Model Functions and Values of Parameters Used in Calibrated Model of 227 m³ s⁻¹ Event

Function/Parameter	Value
Numerical scheme for bed level change calculations	Central
Helical flow parameterization	On
Bed friction	ks = 0.05 m
Horizontal eddy viscosity	νH = 0.1 m2 s−1
Discharge	Invincible gauge hydrograph
Minimum flow depth	d min = 0.05 m
Threshold depth for sediment calculations	SedThr = 0.1 m
Active layer thickness	δa = 0.25 m
Under layer thickness	δu = 2 m
Initial bed composition generation	Generated from precursor storm event
Porosity	Φ = 0.26
Specific density	ρ = 2732 kg m−3
Sediment mixture (active layer)	One φ intervals based on surface layer sampling
Sediment mixture (under layer)	One φ intervals based on bulk sampling
Bed‐material transport equation	Gaeuman et al. [2009]
Bed slope effects	Talmon et al. [1995]
Bank erosion model	Repose = 0.2
Hydraulic time step	Δt = 0.6 s
Morphological factor	MorFac = 5
Grid resolution	Δx = 3 m