Hydraulic Modelling and Breach Analysis

BWB have extensive experience of modelling all aspects of the water environment and access to cutting edge software to develop models from scratch or adapt existing models. The different modelling approaches can be summarised as follows:


One dimensional hydraulic modelling of river and sewer systems, can applied to strategic catchment scale to site specific assessments. Primarily used to derive flood level information, but it can also be used as a useful design tool, and be used in water quality and sediment transport assessments. One-dimensional hydraulic modelling is regularly used in flood studies, development based flood risk assessments, and in flood alleviation projects. It has also been successfully used to challenge EA flood zones. BWB utilises the standard UK software ISIS, HEC-RAS, ESTRY packages.


Two dimensional modelling offers a powerful tool for assessment of complex flow routing and floodplains. It has applications within fluvial, estuarine and coastal environments. It is often dynamically linked to a 1D hydraulic river or sewer model to add an overland flow routing element. This modelling approach is regularly used with flood risk assessments, floodplain mapping, hazard mapping and flood alleviation design projects. It has also been successfully used to challenge EA Flood Zones. BWB utilise the industry standard TUFLOW software package.


Three-dimensional modelling provides a tool for fine scale assessments of hydraulic structures within a fluvial, tidal or sewer environments. This modelling approach can be used to validate the operation of existing structures, as well as providing a design tool for new structures. BWB utilises the OpenFOAM software package.


Breach analysis involves the simulation of the potential flooding that could result due to a failure or overtopping of existing flood defences. Many areas are currently protected from flooding by breach analysis, using hydraulic modelling. It means that we can quantify the impacts of when these defences fail. BWB also use the findings of breach analysis to optimise flood mitigation strategies.

Related Projects

College Gate, Oldbury

The College Gate development site is situated in Brandhall, a heavily urbanised area of Birmingham.

Following the original Outline Planning approval and purchase of the College Gate dev...

Key contacts: Iqbal Rassool Graham Littlewood

Asda, Chester

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An existing Bowling alley and Cinema were demolished ...

Key contacts:

Wales Street, Kings Sutton

BWB's Water Service was appointed to undertake a study of the historically and recently flooded properties at Wales Street in the village of King's Sutton near Banbury. The project involved co-ordinat...

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East Midlands Distribution Centre

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BWB was commissioned to undertake the ci...

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Sketchley Brook River Restoration

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Coseley Eco Park

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Raynesway, Derby

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Sudbrook Mill

Sudbrook is located on the coast of the Severn Estuary on the valley side of the Nedern Brook, Monmouthshire. Tide levels place a proposed development area within Flood Zone C2 - making it unsuitable ...

Key contacts: Stuart Nelmes

T12 Link Road, Chellaston

As part of a wider strategic development known as Infinity Park, Derby, a proposed Link Road and construction of a Flood Alleviation Area had the potential to impact local watercourses. BWB provided a...

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Toyota Manufacturing Car Park

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Bell Farm

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Brough South

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Pebble Mill, Birmingham

The 11 hectare (27-acre) historic Pebble Mill site, part of the Calthorpe Estate in Edgbaston, was the BBC's Birmingham home for over 40 years until the doors were finally closed in 2004, when the cor...

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BWB delivered a range of pre-planning services that helped Badminton England secure planning approval for a new National Badminton Centre in Milton Keynes. The proposed £22 million development would ...

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Infinity Park, Derby

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Former DEFRA Veterinary Services Centre, Luddington

BWB Consulting has delivered multidisciplinary pre-planning services to support proposals from Homes England to redevelop the former DEFRA veterinary services centre in the North Warwickshire village ...

Key contacts: Stuart Nelmes


Name: Iqbal Rassool
Job Title: Group Director - Environment

E: Iqbal.Rassool@bwbconsulting.com

Name: Stuart Nelmes
Job Title: Accounts Director - Environment

E: Stuart.Nelmes@bwbconsulting.com