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

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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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