Model settings

This section provides an overview of model settings in the configuration TOML file, below the [model] entry, including descriptions, units and default values.

General

The Table below shows the general model settings applicable for all model types.

Setting Description Unit Default
type Model type: [sbm, sbm_gwf, sediment] - -
cold_start__flag Initialize model with cold (cold_start__flag = true) or warm state - true
cell_length_in_meter__flag Unit cell length of input rasters in lat/lon degree (cell_length_in_meter__flag = false) or in meter, cell length refers to the length of raster cells in x and y direction - false
reservoir__flag Include reservoir modelling - false

Model types sbm and sbm_gwf

The Tables in this subsection show the available models settings for the model types sbm and sbm_gwf.

Land Hydrology SBM

Setting Description Unit Default
snow__flag Include snow modelling - false
snow_gravitional_transport__flag Include gravitional lateral snow transport - false
glacier__flag Include glacier modelling - false
soil_infiltration_reduction__flag Enable reduction factor applied to the soil infiltration capacity - false
soil_layer__thickness Thickness of soil layers mm [100, 300, 800]
saturated_hydraulic_conductivity_profile Saturated hydraulic conductivity depth profile for SBM soil model (also used for kinematic wave lateral subsurface flow) - “exponential”

Routing method

Setting Description Unit Default
land_routing Routing approach for overland flow: [“kinematic-wave”, “local-inertial”] - “kinematic-wave”
river_routing Routing approach for river flow: [“kinematic-wave”, “local-inertial”] - “kinematic-wave”

Kinematic wave routing

Setting Description Unit Default
pit__flag Include pits for kinematic wave flow continuous at subbasin only (upstream of provided pit locations) - false
river_streamorder__min_count Minimum stream order to delineate subbasins for river domain (for multi-threading computing purposes) - 6
land_streamorder__min_count Minimum stream order to delineate subbasins for land domain (for multi-threading computing purposes) - 5
kinematic_wave__adaptive_time_step_flag Enable kinematic wave adaptive (internal) time stepping - false
river_kinematic_wave__time_step Enable kinematic wave fixed internal time stepping for river domain (kinematic_wave__adaptive_time_step_flag = false) s Δt
land_kinematic_wave__time_step Enable kinematic wave fixed internal time stepping for land domain (kinematic_wave__adaptive_time_step_flag = false) s Δt

Local inertial routing

Setting Description Unit Default
river_local_inertial_flow__alpha_coefficient Stability coefficient for internal model time step river flow routing (CFL condition) - 0.7
land_local_inertial_flow__alpha_coefficient Stability coefficient for internal model time step overland flow routing (CFL condition) - 0.7
land_local_inertial_flow__theta_coefficient Weighting factor that adjusts the amount of artificial numerical diffusion for local inertial overland flow - 0.8
river_water_flow_threshold__depth Water depth threshold for calculating river flow between cells m 0.001
land_surface_water_flow_threshold__depth Water depth threshold for calculating overland flow between cells m 0.001
river_water_flow__froude_limit_flag Limit river flow to subcritical-critical according to Froude number - true
land_surface_water_flow__froude_limit_flag Limit overland flow to subcritical-critical according to Froude number - true
river_water_flow__froude_limit_flag Limit river flow to subcritical-critical according to Froude number - true
floodplain_1d__flag Include 1D floodplain schematization for local inertial river routing - false

Groundwater flow

Setting Description Unit Default
conductivity_profile Hydraulic conductivity depth profile: [“uniform”, “exponential”] - “uniform”
drain__flag Include drainage boundary condition - false
constanthead__flag Include constant head boundary condition - false

Model type sediment

The Table below shows the model settings for the model type sediment.

Setting Description Unit Default
rainfall_erosion Rainfall erosion model: [“answers”, “eurosem”] - “answers”
overland_flow_erosion Overland flow erosion model: [“answers”] - “answers”
run_river_model__flag Include river sediment model - false
land_transport Overland flow transport capacity method: [“yalinpart”, “govers”, “yalin”] - “yalin”
river_transport River flow transport capacity method: [“bagnold”, “engelund”, “yang”, “kodatie”, “molinas”] - “bagnold”
Back to top