Hydraulic Units Modelling Components
- 21 Oct 2022
- 3 Minutes to read
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Hydraulic Units Modelling Components
- Updated on 21 Oct 2022
- 3 Minutes to read
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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 |
|---|---|---|
| Flow Time Boundary | Inserts a Flow Time Boundary Unit. |
| Flow Head Boundary | Inserts a Flow Head Boundary Unit. |
| Head Time Boundary | Inserts a Head Time Boundary Unit. |
| Normal / Critical Depth Boundary | NCDBDY unit generates a downstream flow-head relationship based on section data |
| US SCS Hydrograph | Inserts a US Soil Conservation Service Boundary Hydrograph Unit. |
| FSSR16 Boundary | Inserts a Flood Studies Supplementary Report 16 Boundary Hydrograph Unit. |
| FEH Boundary | Inserts a Flood Estimation Handbook Boundary Hydrograph Unit. |
| Rainfall / Evaporation Boundary | REBDY unit provides a rainfall and/or evaporation boundary inflow into a model network |
| FRQSIM Boundary | FRQSIM unit provides a bespoke, fully distributed rainfall-runoff method to generate an inflow hydrograph for a catchment or sub-catchment |
| ReFH Boundary | ReFHBDY unit is an alternative method (to FEH) to derive an inflow hydrograph for a catchment or sub-catchment. |
| Abstract | Inserts an Abstraction Unit. |
| Q Rating | Inserts a Rating Curve Unit. |
| Irrigation Demand | Enables specification of abstraction rules to define an irrigation system |
| 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 |
| Bend | Inserts a Culvert Bend Unit. |
| Culvert Outlet | Inserts a Culvert Outlet Unit. |
| Culvert Inlet | Inserts a Culvert Inlet Unit. |
| Tidal Boundary | Inserts a Tidal Harmonics Boundary Unit. |
| Notional Weir | Inserts a Notional Weir Unit. |
| Pump | Inserts a Open Channel Pump Unit. |
| Round Nosed Broad Crested Weir | Inserts a Round Nosed Broad Crested Weir Unit. |
| General Purpose Weir | Inserts a General Purpose Weir Unit. |
| Sharp Crested Weir | Inserts a Sharp Crested Weir Unit. |
| Gated Weir | Inserts a Gated Weir Unit. |
| Vertical Sluice | Inserts a Vertical Sluice Gate Unit. |
| Radial Sluice | Inserts a Radial Sluice Gate Unit. |
| Bridge (USBPR 1978) | Inserts a USBPR Bridge Unit. |
| Bridge (Arch) | Inserts an Arch Bridge Unit. |
| Bridge (Pier-Loss) | Inserts a Pier Loss Bridge Unit. |
| Orifice | Inserts an Orifice Unit. |
| Inverted Syphon | Inserts an Inverted Syphon Unit (same as Orifice Unit). |
| Outfall | Inserts an Outfall Unit (same as Orifice Unit). |
| Flood Relief Arch | Inserts a Flood Relief Arch Unit (same as Orifice Unit). |
| Bernoulli Loss | Inserts a Bernoulli Loss Unit. |
| General Head Loss | Inserts a General Head Loss Unit. |
| Blockage | Represents a channel blockage using the proportion of the flow area obstructed. |
| Flow Head Control | Inserts a Flow Head Control Unit. |
| Crump Weir | Inserts a Crump Weir Unit. |
| 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). |
| Syphon Spillway | Inserts a Syphon Spillway Unit. |
| River Section | Inserts a River Section Unit. |
| CES Section | CES Section uses the Depth-Integrated Reynolds-Averaged Navier-Stokes Method to calculate conveyance for a River Section. |
| Interpolate | Inserts an Interpolate Unit. |
| Replicate | Inserts a Replicate Unit. |
| Symmetrical Conduit | Inserts a Symmetrical Conduit Unit. |
| Asymmetrical Conduit | Inserts an Asymmetrical Conduit Unit. |
| Full Arch Conduit | Inserts a Full Arch Conduit Unit. |
| Sprung Arch Conduit | Inserts a Sprung Arch Conduit Unit. |
| Rectangular Conduit | Inserts a Rectangular Conduit Unit.. |
| Circular Conduit | Inserts a Circular Conduit Unit. |
| River Muskingum | Inserts a Muskingum Unit. |
| River Muskingum-XSEC | Inserts a Variable Parameter Muskingum Cunge Cross Section Unit. |
| River Muskingum-VPMC | Inserts a Variable Parameter Muskingum Cunge Routing Unit. |
| River Muskingum-RSEC | Inserts a Variable Parameter Muskingum Cunge Routing Section Unit. |
| Junction | Inserts a Junction Unit. |
| 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 |
| Manhole | Simulates discharge through a manhole from a surcharged culvert |
| Comment | Inserts a Comment Unit. |
| Wind Shear | Models the effects of wind shear on open-channel sections, which may be of particular significance in wide rivers and estuaries. |
| Spill Unit | Inserts a Spill Unit. |
| Flood Plain Section | Inserts a Floodplain Section Unit. |
| Reservoir | Inserts a Reservoir Unit. |
| Pond | Inserts a Pond Unit. |
| 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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