HydPy-SW1D-Q-Out (submodel for subtracting pre-determined discharge from a channel outlet)

The HydPy-SW1D model family member sw1d_q_out is a simple routing submodel, which allows taking observed or previously simulated discharge series as “longitudinal” channel outflow.

Please refer to the documentation of the “composite model” sw1d_network, where we demonstrate and discuss sw1d_q_out in more detail (see the Bifurcations example).

class hydpy.models.sw1d_q_out.Model

Bases: Main_CrossSectionModel_V2, RoutingModel_V3

HydPy-SW1D-Q-Out (submodel for subtracting pre-determined discharge from a channel outlet).

The following interface methods are available to main models using the defined model as a submodel:

• Perform_Preprocessing_V4 Routing model interface method for preprocessing data that is invariant within each external simulation step.

• Determine_MaxTimeStep_V4 Interface method for determining the highest possible computation time step at an outflow location.

• Determine_Discharge_V4 Interface method for determining the discharge at an outflow location.

• Perform_Postprocessing_V4 Routing model interface method for executing all tasks necessary at the end of each external simulation step.

• Get_MaxTimeStep_V1 Interface method for querying the highest possible computation time step in s.

• Get_Discharge_V1 Interface method for querying the discharge in m³/s.

• Get_PartialDischargeDownstream_V1 Return a partial discharge estimate suitable for an upstream model.

• Get_DischargeVolume_V1 Interface method for querying the discharge in m³.

• Set_TimeStep_V1 Interface method for setting the actual computation time step in s.

The following “additional methods” might be called by one or more of the other methods or are meant to be directly called by the user:

• Pick_Outflow_V1 Pick the longitudinal outflow from an arbitrary number of outlet sequences.

• Calc_WaterLevelUpstream_V1 Query the water level from an upstream submodel that follows the StorageModel_V1 interface.

• Calc_WaterLevel_V3 Take the water level from the upstream channel segment.

• Calc_WaterDepth_WettedArea_CrossSectionModel_V2 Let a submodel that follows the CrossSectionModel_V2 submodel interface calculate the water depth and the wetted area based on the current water level.

• Calc_WaterDepth_WettedArea_V1 Let a submodel that follows the CrossSectionModel_V2 submodel interface calculate the water depth and the wetted area based on the current water level.

• Calc_MaxTimeStep_V4 Estimate the highest possible computation time step for which we can expect stability for an outflow-providing routing model.

• Calc_DischargeVolume_V2 Calculate the total discharge volume of a complete external simulation step at once.

Users can hook submodels into the defined main model if they satisfy one of the following interfaces:

• CrossSectionModel_V2 Interface for calculating discharge-related properties at a channel cross-section.

• RoutingModel_V1 Interface for calculating the inflow into a channel.

• RoutingModel_V2 Interface for calculating the discharge between two channel segments.

• StorageModel_V1 Interface for calculating the water amount stored in a single channel segment.

DOCNAME: DocName = ('SW1D-Q-Out', 'submodel for subtracting pre-determined discharge from a channel outlet')

crosssection: SubmodelProperty[CrossSectionModel_V2]

Required submodel that complies with the following interface: CrossSectionModel_V2.

storagemodelupstream: modeltools.SubmodelProperty[StorageModel_V1]

Required reference to the neighbour storage model upstream.

storagemodelupstream_is_mainmodel

storagemodelupstream_typeid

routingmodelsupstream: modeltools.SubmodelsProperty[RoutingModel_V1 | RoutingModel_V2]

References to the neighbour routing models lying upstream.

REUSABLE_METHODS: ClassVar[tuple[type[ReusableMethod], ...]] = ()

cymodel: CyModelProtocol | None

parameters: parametertools.Parameters

sequences: sequencetools.Sequences

masks: masktools.Masks

class hydpy.models.sw1d_q_out.ControlParameters(master: Parameters, cls_fastaccess: type[FastAccessParameter] | None = None, cymodel: CyModelProtocol | None = None)

Bases: SubParameters

Control parameters of model sw1d_q_out.

The following classes are selected:

• LengthUpstream() The upstream channel segment’s length [km].

• TimeStepFactor() A factor for reducing the estimated computation time step to increase numerical stability [-].

class hydpy.models.sw1d_q_out.DerivedParameters(master: Parameters, cls_fastaccess: type[FastAccessParameter] | None = None, cymodel: CyModelProtocol | None = None)

Bases: SubParameters

Derived parameters of model sw1d_q_out.

The following classes are selected:

• Seconds() The length of the actual simulation step size in seconds [s].

class hydpy.models.sw1d_q_out.FactorSequences(master: Sequences, cls_fastaccess: type[TypeFastAccess_co] | None = None, cymodel: CyModelProtocol | None = None)

Bases: FactorSequences

Factor sequences of model sw1d_q_out.

The following classes are selected:

• MaxTimeStep() The highest possible computation time step according to local stability considerations [s].

• TimeStep() The actual computation step according to global stability considerations [s].

• WaterDepth() Water depth [m].

• WaterLevel() Water level [m].

• WaterLevelUpstream() The upstream channel segment’s water level [m].

• WettedArea() The channel wetted area [m²].

class hydpy.models.sw1d_q_out.FluxSequences(master: Sequences, cls_fastaccess: type[TypeFastAccess_co] | None = None, cymodel: CyModelProtocol | None = None)

Bases: FluxSequences

Flux sequences of model sw1d_q_out.

The following classes are selected:

• Outflow() Longitudinal flow out of the last channel segment [m³/s].

• DischargeVolume() The total amount of discharge of a simulation step [m³/T].

class hydpy.models.sw1d_q_out.OutletSequences(master: Sequences, cls_fastaccess: type[TypeFastAccess_co] | None = None, cymodel: CyModelProtocol | None = None)

Bases: OutletSequences

Outlet sequences of model sw1d_q_out.

The following classes are selected:

• LongQ() The longitudinal outflow of the last channel segment [m³/s].

class hydpy.models.sw1d_q_out.StateSequences(master: Sequences, cls_fastaccess: type[TypeFastAccess_co] | None = None, cymodel: CyModelProtocol | None = None)

Bases: StateSequences

State sequences of model sw1d_q_out.

The following classes are selected:

• Discharge() Discharge [m³/s].