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Culvert Class

Models the flow through typically longer pipe between limiting cross sections (up- and down- stream). The pipe my have any cross section geometry and may be either closed or open.

See ICulvert for parameters for setting up a culvert.

The culvert such that critical flow conditions are calculated prior to calculation of the actual flow. The critical flow conditions are typically by activating the CalcCriticalConditions method from a user interface The result of this procedure is stored as part of the culvert specification. See CalculateFreeOverFlowQhRelation for more detail.

Inheritance Hierarchy

Namespace:  DHI.Mike1D.StructureModule
Assembly:  DHI.Mike1D.StructureModule (in DHI.Mike1D.StructureModule.dll) Version: 19.0.0.0 (11.1.1.1111)
Syntax
public class Culvert : ValvedStructure, ICulvert, 
	IValvedStructure, IStructure, IDoubleProxy, IQuantityProxy, IPlotableStructure, 
	IHeadLossStructure, ILinearZeroVariation, ISolvesEnergyEquation, IStructureCrossSectionSetup, IIteratingStructure

The Culvert type exposes the following members.

Constructors
  NameDescription
Public methodCulvert
Constructor.
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Properties
  NameDescription
Public propertydDischargedDownStreamWaterLevel
Calculated Discharge derivative with DownStreamWaterLevel. Downstream is relative to the direction of chainage. The value is calculated by SetWaterLevels. Unit: [m^2/s]
(Inherited from Structure.)
Public propertydDischargedUpStreamWaterLevel
Calculated Discharge derivative with UpStreamWaterLevel. Upstream is relative to the direction of chainage. The value is calculated by SetWaterLevels. Unit: [m^2/s]
(Inherited from Structure.)
Public propertyDelhs
Linear flow variation. For water level differences less than delhs use a linear Q variation between h1-h2=delhs and h1-h2=0. This is to avoid stability problems for small water level differences where dQdh goes to infinity. Unit: [m] Default: 0.01
Public propertyDischarge
Calculated Discharge. The value is calculated by SetWaterLevels. Unit: [m^3/s]
(Inherited from Structure.)
Public propertyDownstreamCrossSection
Downstream cross section data. The cros section data is the processed level, with, area.
Public propertyDownstreamInvertLevel
The invert level downstream. Unit: [m] Default: 0
Public propertyDownstreamWaterLevel
Downstream water level.Downstream refers to the direction of chainage. The water level is set by use of SetWaterLevels Unit: [m]
(Inherited from Structure.)
Public propertyExtensionData
Property used by (de)serializer, when it can not find proper target for a data field. Support of forward compatible data contracts.
(Inherited from Structure.)
Public propertyFlowArea
Flow area through structure. Used by most (but not all) structures.
(Inherited from Structure.)
Public propertyFlowAreaOutflow
Flow area for outflow of culvert.
Public propertyFlowFactor
The discharge (and discharge derivatives) are scaled by the flow factor.
(Inherited from Structure.)
Public propertyGeometry
The geometry of the culvert section.
Public propertyHeadLossBendsNegativeFlow
Bends head loss factor for negative flow. Unit: [] Default value = 0.
Public propertyHeadLossBendsPositiveFlow
Bends head loss factor for positive flow. Unit: [] Default value = 0.
Public propertyHeadLossFreeOverflowNegativeFlow
Free overflow factor for negative flow. Default value = 1.
Public propertyHeadLossFreeOverflowPositiveFlow
Free overflow factor for positive flow. Default value = 1.
Public propertyHeadLossInflowNegativeFlow
Inflow head loss factor for positive flow. Default value = 0.5.
Public propertyHeadLossInflowPositiveFlow
Inflow head loss factor for positive flow. Default value = 0.5.
Public propertyHeadLossOutflowNegativeFlow
Free overflow factor for negative flow. Default value = 1.
Public propertyHeadLossOutflowPositiveFlow
Outflow head loss factor for positive flow. Default value = 1.
Public propertyHorizontalOffSetFromMarker2
Horizontal offset relative to up- and down- stream cross sections. Used when doing structure plotting.
Public propertyHydraulicParameters
Hydraulic parameters for the given geometry.
Public propertyID
Structure ID
(Inherited from Structure.)
Public propertyIDInUserUnit
Used to get a consistent description of the structure. The ID comes in user units. Used e.g. when reporting errors, warnings and hints.
(Inherited from Structure.)
Public propertyImplicit
Flag to control if the structure is implicit or explicit. If the structure is explicit (Implicit == false) then the derivatives of the dicharge are always zero. Default value: true
(Inherited from Structure.)
Public propertyInvertLevelDownstream
Invert level down stream
(Overrides StructureInvertLevelDownstream.)
Public propertyInvertLevelUpstream
Invert level up stream
(Overrides StructureInvertLevelUpstream.)
Public propertyLength
Length of the culvert. Unit: [m] Default: 0
(Overrides StructureLength.)
Public propertyLocation
Location property.
(Inherited from Structure.)
Public propertyMannings_n
Mannings n. Unit: [s/m^(1/3)] Default: 0.013
Public propertyMaximumIterations
Maximum number of iterations in a structure to obtain convergence of the discharge. Default value = 100

Currently this is set for all structures from the MaximumIterationsInStructure, but it is prepared for individual structure values.

Public propertyMultiplicator
Multiplicator or "number of culverts". Used for modelling more culverts in one go. Unit: [] Default: 1
Public propertyMultiplicatorDischarge Obsolete.
Multiplicator or "number of culverts", that are multiplied by the discharge. This is set if CalculateFlowConditions(Int32) is executed, since the returned tables does not take Multiplicator into account.
Public propertyNonConvergedIterations
Total number of iterations in culvert structure.
Public propertyOrificeFlowCoefficientsNegativeFlow
Orifice flow coefficients for negative flow
Public propertyOrificeFlowCoefficientsPositiveFlow
Orifice flow coefficients for positive flow
Public propertyPartOfCompositeFlow
When the culvert is part of a composite structure Q1=Q2 will differ from Qs. Qs=Q1*_partOfCompositeFlow;
Public propertyQhFlowtypeRelationsNegativeFlow
Q/h relations for negative flow
Public propertyQhFlowtypeRelationsPositiveFlow
Q/h relations for positive flow
Public propertyRunTimeDiagnostics
The getter is used to get a list of errors.
(Inherited from Structure.)
Public propertySideStructureBank
Bank side that side-structure is located on

If side structure contains reservoir, and has the Coordinate set, this is not used (and should be set to Undefined).

(Inherited from Structure.)
Public propertySideStructureReservoir
Reservoir at end of side structure. Null if not side structure, or no reservoir is defined
(Inherited from Structure.)
Public propertySolverMethod
How to solve the energy equation.
Public propertyStructureIterationCentering
Used when making relaxation when iterating to find the subcritical solution for structures solved using the energy equation. When it equals 1 no relaxation is made.
Public propertyStructureType
Type of structure
(Inherited from Structure.)
Public propertyTopoID
String used to identified cross sections
(Inherited from Structure.)
Public propertyTotalIterations
Total number of iterations in culvert structure.
Public propertyType
Structure type, unique for each structure.
(Overrides StructureType.)
Public propertyUpstreamCrossSection
Upstream cross section data. The cros section data is the processed level, with, area.
Public propertyUpstreamInvertLevel
The invert level upstream. Unit: [m] Default: 0
Public propertyUpstreamWaterLevel
Upstream water level. Upstream refers to the direction of chainage. The water level is set by use of SetWaterLevels Unit: [m]
(Inherited from Structure.)
Public propertyValve
Type of the valve Default: None
(Inherited from ValvedStructure.)
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Methods
  NameDescription
Public methodAccepts
List of data types that is accepted, i.e., that you can get a ValueSetter for.
(Inherited from Structure.)
Protected methodApplyFlowFactor
Applies flow factor to discharge and it's derivatives
(Inherited from Structure.)
Public methodCalculateFlowConditions
Call this method to produce Q-h relations and hydraulic parameters from culvert data.
Public methodControlSetFlowFactor
Set flow factor to specified value
(Inherited from Structure.)
Public methodDescription
Return a string that describes this structure. Includes structure type and ID
(Inherited from Structure.)
Public methodDispose
Frees the licenses held.
(Inherited from Structure.)
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodExplicitStructureSupport
DEBUG: This method is called from Validate() if _implitcit == false to check if the structure supports being Explicit. Once all structures support explicit operation this method can be deleted.
(Inherited from Structure.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Public methodGetControlAction
Get control action for the specified id. It always returns one of the ActionControl delegates. It will return null if controlActionId is not valid.

Base implementation for IControllable

(Inherited from Structure.)
Public methodGetCurrentValue
Get the current value of the control for the specified id.

Base implementation for IControllable

(Inherited from Structure.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodInitialize(IDiagnostics)
Set up structure and set runtime diagnostics object
(Inherited from Structure.)
Public methodInitialize(ICrossSection, ICrossSection, Boolean, IDiagnostics)
Prepare the weir: Set the cross sections on each side of the weir.
(Overrides StructureInitialize(ICrossSection, ICrossSection, Boolean, IDiagnostics).)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Public methodOffers
A list of quantities available from this structure
(Inherited from Structure.)
Public methodPrepare(HDParameterData, IDiagnostics)
Set up structure and set runtime diagnostics object
(Overrides StructurePrepare(HDParameterData, IDiagnostics).)
Public methodPrepare(DateTime, HDParameterData, IDiagnostics)
Set up structure and set runtime diagnostics object
(Inherited from Structure.)
Public methodResetControlledState
Reset internal state (if any) used by controlling class. Called after a controlling class has performed a control sequence, and simulation is restarted.

Base implementation for IControllable

(Inherited from Structure.)
Public methodSetControlStrategyId
Set control strategy ID manually.

Base implementation for IControllable

(Inherited from Structure.)
Protected methodSetInputWaterLevels (Inherited from Structure.)
Public methodSetup
Public methodSetWaterLevels(Double, Double)
Sets up- and down- stream water level and forces the calculation of the discharge and its derivatives.
(Overrides StructureSetWaterLevels(Double, Double).)
Public methodSetWaterLevels(Double, Double, Double, Double)
Sets up- and down-stream water level and forces the calculation of the discharge and its derivatives.
Protected methodSetZeroFlow
Sets the conditions for zero flow
(Inherited from Structure.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Public methodUpdatedWaterLevels
After a time step (or iteration) has finished, update the discharge to the actual value, based on the final water levels and the discharge derivatives.
(Inherited from Structure.)
Public methodValidate
Writes errors, warnings and hints into their respective member classes. The member objects are initially cleared.
(Overrides StructureValidate.)
Public methodValueGetter
Get value setter for the specified data quantity
(Overrides StructureValueGetter(Int32).)
Public methodValueSetter
Get value setter for the specified data type
(Inherited from Structure.)
Protected methodValveDecidesFlow
Decides whether the valve will decide the flow and sets the flow to zero in case the valve forbids flow.
(Inherited from ValvedStructure.)
Protected methodZeroFlowDueToValve
Decides wheather the valve will prevent flow given the flow direction.
(Inherited from ValvedStructure.)
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Fields
  NameDescription
Protected field_accepts
List of quantities that are accepted
(Inherited from Structure.)
Protected field_controlStategyId
If the structure is being controlled, then _controlStategyId contains the ID of the active control strategy
(Inherited from Structure.)
Protected field_downstreamWaterLevel
Downstream water level, as set by SetWaterLevels(Double, Double) Unit: [m]
(Inherited from Structure.)
Protected field_dqdhDownstream
The derivative of flow through the structure with downstream water level. The flow is calculated in the derived classes when the SetWaterLevels method is called. Unit: [m2/sec]
(Inherited from Structure.)
Protected field_dqdhUpstream
The derivative of flow through the structure with upstream water level. The flow is calculated in the derived classes when the SetWaterLevels method is called. Unit: [m2/sec]
(Inherited from Structure.)
Protected field_flowArea
Flow area through structure. Used by most (but not all) structures.
(Inherited from Structure.)
Protected field_flowDir
FlowDir is used to determine which parameters to use for the flow calculations. Derived by the SetWaterLevels(Double, Double).
(Inherited from Structure.)
Protected field_id
Identification name of the structure
(Inherited from Structure.)
Protected field_implicit
If _implicit == false, then the derivatives are always zero. Default value: true.
(Inherited from Structure.)
Protected field_location
Location in the network
(Inherited from Structure.)
Protected field_offers
List of quantities that are offered
(Inherited from Structure.)
Protected field_q
Flow through the structure. The flow is calculated in the derived classes when the SetWaterLevels method is called. Unit: [m3/sec]
(Inherited from Structure.)
Protected field_runTimeDiagnostics
Diagnostics are written into this Diagnostics during calculations. Set during Initialize(IDiagnostics)
(Inherited from Structure.)
Protected field_topoID
Identification used to find referenced cross sections
(Inherited from Structure.)
Protected field_upstreamWaterLevel
Upstream water level, as set by SetWaterLevels(Double, Double) Unit: [m]
(Inherited from Structure.)
Protected field_valveType
Type of the valve Default: None
(Inherited from ValvedStructure.)
Public fieldUpstreamExternalEnergyLevel
Flag indicating whether to use external energy level upstream, or whether to calculate it as part of the internal solution.

It is more stable to use set to true.

Public fieldStatic memberUseNewCulvert
Flag specifying whether to use new or old culvert iteration procedure
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Extension Methods
  NameDescription
Public Extension MethodGetter

From the proxy, return an FuncTResult for the specified quantity.

It returns the first quantity of that type that is offered, and null if the quantity is not offered.

(Defined by ProxyExtensions.)
Public Extension MethodGetters
Returns a set of FuncTResult for the quantity. We can return several quantities with the same id (usually they will differ in their description). If the quantity is not offerent, an empty list is returned.
(Defined by ProxyExtensions.)
Public Extension MethodGettersFraction
Returns a set of FuncT, TResult for the quantity. We can return several quantities with the same id (usually they will differ in their description). If the quantity is not offerent, an empty list is returned.
(Defined by ProxyExtensions.)
Public Extension MethodGetterUnboxed

From the proxy, return an FuncTResult for the specified quantity.

It returns the first quantity of that type that is offered, and null if the quantity is not offered.

(Defined by ProxyExtensions.)
Public Extension MethodInitialize(CrossSectionData, Boolean, IDiagnostics)Overloaded.
Helper function for some unit tests. Do not use.
(Defined by StructureExtensions.)
Public Extension MethodInitialize(BoundaryData, CrossSectionData, Boolean, IDiagnostics)Overloaded.
Helper function for some unit tests. Do not use.
(Defined by StructureExtensions.)
Public Extension MethodIsSideStructure
Returns true if the structure is a side structure
(Defined by StructureExtensions.)
Public Extension MethodSetter

From the proxy, return an IDoubleGetSet for the specified quantity.

It returns the first quantity of that type that is accepted, and null if the quantity is not accepted.

(Defined by ProxyExtensions.)
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See Also