Hydraulic Units Modelling Components
    • 21 Oct 2022
    • 3 Minutes to read

    Hydraulic Units Modelling Components


    Article summary

    Flood Modeller model networks are built up from a series of individual 'building blocks' known as hydraulic units. Each unit represents a particular hydraulic attribute of the modelled network, e.g. a river section, a junction or a weir.

    The icon associated to each unit is used in the following places within the Flood Modeller 1D Interface:

    • Buttons on the 1D Build toolbar - the Flood Modeller interface contains multiple banks of toolbar buttons. The majority of these are used to add new hydraulic units to a model. Each of these buttons display the icon that corresponds to the unit type that will be added
    • Network Panel - each unit added to a model will appear with the associated icon displayed adjacent to the given node name.
    • Map View - when a model is visualised the network is defined by the linking of appropriate hydraulic unit icons.

    The following section lists the available units that can be utilised when constructing a model, together with a brief definition and links to more detailed descriptions.

    Hydraulic Unit Icons

    Icon

    Pop up

    Function

    FloodModeller_FlowTimeBoundary16

    Flow Time Boundary

    Inserts a Flow Time Boundary Unit.

    FloodModeller_FlowHeadBoundary16

    Flow Head Boundary

    Inserts a Flow Head Boundary Unit.

    FloodModeller_HeadTimeBoundary16

    Head Time Boundary

    Inserts a Head Time Boundary Unit.

    FloodModeller_NormalCriticalDepthBoundary16

    Normal / Critical Depth Boundary

    NCDBDY unit generates a downstream flow-head relationship based on section data

    FloodModeller_USSCSHydrograph16

    US SCS Hydrograph

    Inserts a US Soil Conservation Service Boundary Hydrograph Unit.

    FloodModeller_FSSR16Boundary16

    FSSR16 Boundary

    Inserts a Flood Studies Supplementary Report 16 Boundary Hydrograph Unit.

    FloodModeller_FEHBoundary16

    FEH Boundary

    Inserts a Flood Estimation Handbook Boundary Hydrograph Unit.

    FloodModeller_RainfallEvaporationBoundary16

    Rainfall / Evaporation Boundary

    REBDY unit provides a rainfall and/or evaporation boundary inflow into a model network

    FloodModeller_FRQSIMBoundary16

    FRQSIM Boundary

    FRQSIM unit provides a bespoke, fully distributed rainfall-runoff method to generate an inflow hydrograph for a catchment or sub-catchment

    FloodModeller_ReFHBoundary16

    ReFH Boundary

    ReFHBDY unit is an alternative method (to FEH) to derive an inflow hydrograph for a catchment or sub-catchment.

    FloodModeller_Abstract16

    Abstract

    Inserts an Abstraction Unit.

    FloodModeller_QRating16

    Q Rating

    Inserts a Rating Curve Unit.

    FloodModeller_IrrigationDemand16

    Irrigation Demand

    Enables specification of abstraction rules to define an irrigation system

    FloodModeller_Gauge16

    Gauge

    Gauge units can be applied to real-time forecasting applications where there is a need to improve existing models in real time by an updating process

    FloodModeller_Bend16

    Bend

    Inserts a Culvert Bend Unit.

    FloodModeller_CulvertOutlet16

    Culvert Outlet

    Inserts a Culvert Outlet Unit.

    FloodModeller_CulvertInlet16

    Culvert Inlet

    Inserts a Culvert Inlet Unit.

    FloodModeller_TidalBoundary16

    Tidal Boundary

    Inserts a Tidal Harmonics Boundary Unit.

    FloodModeller_NotionalWeir16

    Notional Weir

    Inserts a Notional Weir Unit.

    FloodModeller_Pump16

    Pump

    Inserts a Open Channel Pump Unit.

    FloodModeller_RoundNosedBroadCrestedWeir16

    Round Nosed Broad Crested Weir

    Inserts a Round Nosed Broad Crested Weir Unit.

    FloodModeller_GeneralPurposeWeir16

    General Purpose Weir

    Inserts a General Purpose Weir Unit.

    FloodModeller_SharpCrestedWeir16

    Sharp Crested Weir

    Inserts a Sharp Crested Weir Unit.

    FloodModeller_GatedWeir16

    Gated Weir

    Inserts a Gated Weir Unit.

    FloodModeller_VerticalSluice16

    Vertical Sluice

    Inserts a Vertical Sluice Gate Unit.

    FloodModeller_RadialSluice16

    Radial Sluice

    Inserts a Radial Sluice Gate Unit.

    FloodModeller_BridgeUSBPR197816

    Bridge (USBPR 1978)

    Inserts a USBPR Bridge Unit.

    FloodModeller_BridgeArch16

    Bridge (Arch)

    Inserts an Arch Bridge Unit.

    FloodModeller_BridgePierLoss16

    Bridge (Pier-Loss)

    Inserts a Pier Loss Bridge Unit.

    FloodModeller_Orifice16

    Orifice

    Inserts an Orifice Unit.

    FloodModeller_InvertedSyphon16

    Inverted Syphon

    Inserts an Inverted Syphon Unit (same as Orifice Unit).

    FloodModeller_Outfall16

    Outfall

    Inserts an Outfall Unit (same as Orifice Unit).

    FloodModeller_FloodReliefArch16

    Flood Relief Arch

    Inserts a Flood Relief Arch Unit (same as Orifice Unit).

    FloodModeller_BernoulliLoss16

    Bernoulli Loss

    Inserts a Bernoulli Loss Unit.

    FloodModeller_GeneralHeadLoss16

    General Head Loss

    Inserts a General Head Loss Unit.

    FloodModeller_Blockage16

    Blockage

    Represents a channel blockage using the proportion of the flow area obstructed.

    FloodModeller_FlowHeadControl16

    Flow Head Control

    Inserts a Flow Head Control Unit.

    FloodModeller_CrumpWeir16

    Crump Weir

    Inserts a Crump Weir Unit.

    FloodModeller_FlatVWeir16

    Flat-V Weir

    Inserts a Flat V weir. This is a long-based weir with a triangular longitudinal profile and a transverse symmetrical V-shaped crest having small side-slopes (common in UK).

    FloodModeller_SyphonSpillway16

    Syphon Spillway

    Inserts a Syphon Spillway Unit.

    FloodModeller_RiverSection16

    River Section

    Inserts a River Section Unit.

    FloodModeller_CESSection16

    CES Section

    CES Section uses the Depth-Integrated Reynolds-Averaged Navier-Stokes Method to calculate conveyance for a River Section.

    FloodModeller_Interpolate16

    Interpolate

    Inserts an Interpolate Unit.

    FloodModeller_Replicate16

    Replicate

    Inserts a Replicate Unit.

    FloodModeller_SymmetricalConduit16

    Symmetrical Conduit

    Inserts a Symmetrical Conduit Unit.

    FloodModeller_AsymmetricalConduit16

    Asymmetrical Conduit

    Inserts an Asymmetrical Conduit Unit.

    FloodModeller_FullArchConduit16

    Full Arch Conduit

    Inserts a Full Arch Conduit Unit.

    FloodModeller_SprungArchConduit16

    Sprung Arch Conduit

    Inserts a Sprung Arch Conduit Unit.

    FloodModeller_RectangularConduit16

    Rectangular Conduit

    Inserts a Rectangular Conduit Unit..

    FloodModeller_CircularConduit16

    Circular Conduit

    Inserts a Circular Conduit Unit.

    FloodModeller_RiverMuskingham16

    River Muskingum

    Inserts a Muskingum Unit.

    FloodModeller_RiverMuskinghamXSec16

    River Muskingum-XSEC

    Inserts a Variable Parameter Muskingum Cunge Cross Section Unit.

    FloodModeller_RiverMuskinghamVPMC16

    River Muskingum-VPMC

    Inserts a Variable Parameter Muskingum Cunge Routing Unit.

    FloodModeller_RiverMuskinghamRSec16

    River Muskingum-RSEC

    Inserts a Variable Parameter Muskingum Cunge Routing Section Unit.

    FloodModeller_JunctionOpen16

    Junction

    Inserts a Junction Unit.

    FloodModeller_JunctionEnergy16

    Energy Junction

    Whereas the Open Junction unit equalises water levels at the junction, the Total Energy Junction equalises the total energy head at all nodes

    FloodModeller_Manhole16

    Manhole

    Simulates discharge through a manhole from a surcharged culvert

    FloodModeller_Comment16

    Comment

    Inserts a Comment Unit.

    FloodModeller_WindShear16

    Wind Shear

    Models the effects of wind shear on open-channel sections, which may be of particular significance in wide rivers and estuaries.

    FloodModeller_SpillUnit16

    Spill Unit

    Inserts a Spill Unit.

    FloodModeller_FloodPlainSection16

    Flood Plain Section

    Inserts a Floodplain Section Unit.

    FloodModeller_Reservoir16

    Reservoir

    Inserts a Reservoir Unit.

    FloodModeller_Pond16

    Pond

    Inserts a Pond Unit.

    FloodModeller_LateralInflow16

    Lateral Inflow

    Lateral Inflow unit distributes total inflow from a boundary between across multiple river reaches or reservoirs. Inputs can be divided according to reach length, surface area or user specified proportions.


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