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Hydraulic Structures

Flood Modeller provides an extensive range of hydraulic structures, many of which include operational control rules, enabling you to accurately model the impact of structures and their operation on flows and levels within a channel.

Water levels are often influenced significantly by structures within the watercourse and traditional Saint-Venant equations are not always appropriate when modelling these. Flood Modeller’s industry-leading river solver includes more than 40 hydraulic units, each configured to apply theory applicable to the specific structure type, enabling you to create appropriate representations of these features within your model.

The software also provides a number of other units to help represent hydraulic effects and processes, including reservoir, manhole, pond, gauge, blockage, breach, pump, levee and many more.

Structures can be combined in parallel or in a series, enabling representations of scenarios such as; flow under a road bridge coupled with flooding over the roadway.


When modelling overland flows, a 2D domain may contain key flow paths that are not identified by the topography data you have available. These may be channels, conduits transporting flows through embankments or even short pathways such as archways under a bridge. Flood Modeller allows you to accurately represent these flows by embedding a structure directly within the 2D domain, simplifying your model build. 

Selected structures can be configured with automatic operation that incorporates logical control rules. These can activate different operating modes as user defined trigger points are reached in your simulation.

By defining a series of rules, you can precisely control the behaviour of an associated structure during a simulation. Typical uses for rules include the opening of a sluice gate according to conditions within the remainder of the network; turning a pump on or off according to levels and flows at local or remote point in the model; and directly setting an abstraction depending on hydraulic conditions at specific location.

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