test_v2

This simple test model is thought for testing numerical integration strategies. It can be seen from two perspectives. On the one hand it implements a simple discontinous equation, bringing numerical integration algorithms into trouble. On the other hand it describes a simple storage with a loss that is constant over time, as long as some storage content is left. The loss rate Q and the initial storage content S can be set as required.

class hydpy.models.test_v2.Model[source]

Bases: hydpy.core.modeltools.ELSModel

Test model, Version 2.

The following methods define the relevant components of a system of ODE equations (e.g. direct runoff):

  • Calc_Q_V2 Calculate the actual storage loss.

The following methods define the complete equations of an ODE system (e.g. change in storage of fast water due to effective precipitation and direct runoff):

  • Calc_S_V1 Calculate the actual storage content.

numconsts: hydpy.core.modeltools.NumConstsELS
numvars: hydpy.core.modeltools.NumVarsELS
element: Optional[‘devicetools.Element’]
cymodel: Optional[typingtools.CyModelProtocol]
parameters: parametertools.Parameters
sequences: sequencetools.Sequences
masks: masktools.Masks
class hydpy.models.test_v2.ControlParameters(master: hydpy.core.parametertools.Parameters, cls_fastaccess: Optional[Type[hydpy.core.parametertools.FastAccessParameter]] = None, cymodel: Optional[hydpy.core.typingtools.CyModelProtocol] = None)

Bases: hydpy.core.variabletools.SubVariables[hydpy.core.parametertools.Parameters, Parameter, hydpy.core.parametertools.FastAccessParameter]

Control parameters of model test_v2.

The following classes are selected:

  • K() Storage coefficient [1/T].

class hydpy.models.test_v2.FluxSequences(master: hydpy.core.sequencetools.Sequences, cls_fastaccess: Optional[Type[FastAccessType]] = None, cymodel: Optional[hydpy.core.typingtools.CyModelProtocol] = None)

Bases: hydpy.core.sequencetools.OutputSequences[FluxSequence]

Flux sequences of model test_v2.

The following classes are selected:

  • Q() Storage loss [mm/T]

vars: GroupType
class hydpy.models.test_v2.SolverParameters(master: hydpy.core.parametertools.Parameters, cls_fastaccess: Optional[Type[hydpy.core.parametertools.FastAccessParameter]] = None, cymodel: Optional[hydpy.core.typingtools.CyModelProtocol] = None)

Bases: hydpy.core.variabletools.SubVariables[hydpy.core.parametertools.Parameters, Parameter, hydpy.core.parametertools.FastAccessParameter]

Solver parameters of model test_v2.

The following classes are selected:

  • AbsErrorMax() Absolute numerical error tolerance [mm/T].

  • RelErrorMax() Relative numerical error tolerance [1/T].

  • RelDTMin() Smallest relative integration time step size allowed [-].

  • RelDTMax() Largest relative integration time step size allowed [-].

class hydpy.models.test_v2.StateSequences(master: hydpy.core.sequencetools.Sequences, cls_fastaccess: Optional[Type[FastAccessType]] = None, cymodel: Optional[hydpy.core.typingtools.CyModelProtocol] = None)

Bases: hydpy.core.sequencetools.OutputSequences[StateSequence]

State sequences of model test_v2.

The following classes are selected:

  • S() Storage content [mm].