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2019 Conference

What's new in Flood Modeller

Jon Wicks, Technical Director - Flood Modeller, Jacobs

Jacobs’ Flood Modeller software continues to be enhanced in response to user feedback as well as our development programme to bring efficiencies and new functionality to our users. This presentation will demonstrate some of the latest functionality added to the software.

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New projections of sea level rise from UKCP18 and FCERM project SC150009

Stuart Allen, Principal Research Scientist, Environment Agency

The latest climate change projections for the UK (UKCP18) were released in November 2018. These included new projections of sea level rise (SLR). The Environment Agency has worked closely with the Met Office to make sure that the projections are useful and usable by others. We outline the new SLR projections and how they differ from the previous set (UKCP09). We also present the new information products that were not available in previous projections and summarise the headline messages.

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Is large scale catchment storage an economically feasible mitigation for climate change?

Stephen Bilby, Water Engineer, Jacobs and Lewis Purbrick, Flood Risk Management Senior Advisor, Environment Agency

The Thames Catchment Storage study was an innovative climate resilience project which evaluated the use of multiple storage areas on a scale never before used in England. In total 100 million m3 of storage was considered, with the potential to mitigate climate change driven increases in fluvial flooding for thousands of homes and businesses. To complete this highly complex project within a tight timescale, several innovative hydrological, hydraulic and economic assessment techniques were developed, including the development of possibly the largest single domain Flood Modeller 1D hydraulic model in the UK. Models were run on Flood Cloud, taking advantage of its 24-7 scheduling and processing capabilities. Specially developed scripts were used to extract results from the very large datasets generated. Detailed knowledge of the Thames catchment was sought from Environment Agency experts and an innovative yet practical hydrological approach to dealing with tributary timing was developed. A new economic assessment technique was developed, using a simulation library approach to maximise reuse of 2D model grids from previous studies. This allowed a level of accuracy associated with run times of several weeks from a model that could be run overnight.

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Flood Modeller and TUFLOW Simulations in the Cloud: Benchmarking Flood Cloud, when to use it and what it costs

Rob Honeywill, Senior Developer, Jacobs and David Hughes, Flood Risk Technical Specialist, Waterco

Waterco have undertaken benchmarking of Flood Cloud on a range of model types and sizes. Together, Waterco and Jacobs will present and interpret the results of this benchmarking to offer comparisons of local and cloud simulation execution, both in terms of run times and cost. Using the results, they will cover when it makes sense to use Flood Cloud and the costs involved (including in comparison to licence rental).

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Modelling of a Larinier fish pass scheme using Flood Modeller

Kathryn Fuller, Hydraulic Modeller, Arcadis

Arcadis was commissioned by the Environment Agency to undertake a flood modelling study in support of a fish pass scheme at Hamm Oil Mills on the Lower River Wey. The scheme intended to provide fish passage between the River Wey Navigation and the River Thames via Coleson’s Channel. The study was carried out using an existing 1D-2D Flood Modeller TUFLOW model of the River Wey to determine if there would be any detrimental impacts resulting from the scheme, ensuring the fish passes could be installed to increase the ecological potential of the river without increasing flood risk to the surrounding properties.

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Using Flood Modeller in Flood Forecasting

Bryony Smith, Principal Hydrologist, Capita

Flood forecasting underpins the wider Flood Warning service provided by the Environment Agency. In a recent overhaul for the launch of the Future Flood Forecasting System, the Agency forecasting models within the Environment have been converted to use the same software. Capita undertook conversion of 17 complex hydrodynamic models from MIKE11 and bespoke software into PDM and Flood Modeller software. We then undertook calibration and performance testing on several sites using MATH by Plan B and Flood Modeller to assess and grade the performance of the models. This presentation will highlight how Flood Modeller was used, lessons learnt and recommendations from the project.

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Flood Modeller Tips and Tricks

Bob Potter, Development Manager, Jacobs and Konrad Adams, Senior Developer, Jacobs

Over the last year, tickets coming in to our support desk have often shown that many of our community may be unaware of some of the really useful tools and techniques within Flood Modeller (that go beyond the material covered by our training courses). Often there are functions available that can help you overcome particular modelling problems or can provide useful insight into your flood data. Bob and Konrad will draw upon their many years of experience, to highlight a selection of these lesser known features and functions within the Flood Modeller interface and solvers and attempt to demonstrate how they can help your modelling work run more efficiently.

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Application of hydraulic modelling in OPW’s national CFRAM programme in Ireland

Gerry Gallagher, Project Engineer, OPW

The application of hydraulic modelling on OPW’s national Catchment Flood Risk Assessment and Management (CFRAM) programme, and the future
modelling requirements for detailed development of flood relief schemes programmed over the coming decade.

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National scale flood mapping using Flood Modeller 2D

Jonathan Garrett, Water Engineer, JBA Consulting

Modelling large catchments can quickly become complex when one considers which inflows and other parameters to use to represent the desired flood event at a useful level of detail. Therefore, a balance between resolving realistic catchment processes in a simplified way that limits opportunities for model instability whilst keeping simulation times to a minimum must be found. This presentation provides a walk-through of a somewhat simplified but robust and relatively quick procedure used to derive fluvial flood mapping for the River Don in Aberdeenshire whereby over 100 km of the river and all its major tributaries were modelled. The modelling was undertaken using a combination of a 1D-2D and a series of 2D only models, the latter being the focus of this presentation. The presentation will also share some tips on using steady state models in Flood Modeller and reveal how to output some nonstandard result grids.

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Flood risk management at the SNCF using Flood Modeller

Mark Cheetham, Senior Engineer, SNCF

The SNCF owns and operates approximately 30,000km of railway line in France. Due to geographical and climate variability, the railway network is exposed to different types of flood risk from surface water runoff from small catchments through to embankment breaches during flood events from larger watercourses. This presentation will show how the SNCF is using Flood Modeller at different phases of the flood risk management process and will highlight different modelling strategies using real case studies.

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