Consulting Engineers and Scientists

Introduction

John Young, Edenvale Young

Welcome to the conference from John Young. A short talk on programme, pubs and pirates.

Managing Flood Risk in the California Central Valley

John Pritchard, Woods Rodgers

John Pritchard will be speaking on U.S. floodplain management issues focusing on flood risk to the Central Valley of California. Modelling challenges including complex hydrology, hydraulics and calibration.

Smart Flood Risk Management Solutions

Keming Hu, Royal Haskoning DHV

Grimsby Tidal Defences - Wave Overtopping and Coastal Flooding

Emay Toha, Black & Veatch

This £14.5m tidal defence scheme promoted by the UK Environment Agency will strengthen the sea wall around Grimsby docks and will reduce the risk of flooding to 14,000 properties.The flood modelling for Grimsby has been undertaken using a TUFLOW model with boundary conditions based on the most recent Environmental Agency's design sea level guidance and wave overtopping calculations in accordance with the EurOtop Manual (2007). The model outputs have been processed for the flood damage economics using Black & Veatch's in-house Flood Damage Economics Model (FDEM) which has an extensive series of quality assurance checks. The modelling effort on Grimsby has enabled refinement of the design of the proposed defences and resulted in significant savings in construction cost.

The Queensland Floods - Two Years On

Bill Syme, BMT WBM

At TUFLOW 2011 Bill Syme presented a talk on severe flooding on Queensland and in particular the effects on Brisbane (the home of BMT WBM). In TUFLOW 32013 he will be looking at the impact of this flood three year on from the floods and reflecting on lessons learnt. (Presentation not available)

SEPA Reservoir Inundation Mapping

Jane Tingay, Capita Symonds

SEPA commissioned Capita Symonds to undertake Reservoir Inundation Mapping (RIM) for all the statutory reservoirs in Scotland. This project is similar to the English RIM project however the main aim for SEPA RIM is risk designation whereas English RIM was initially for emergency planning. Overall SEPA RIM involved a more simplistic approach in respect to the development of breach hydrographs, modelling and deliverables. There were some aspects of SEPA RIM that made the project challenging, including the security requirements and the Scottish topography. With the development of the TUFLOW GPU module run times have been significantly reduced, in some situation from 150 hours to just 8 hours. This presentation looks at the use of the TUFLOW GPU module, comparisons of the two sets of the results and the modelling issues faced. (Presentation not available)

Brandhall Brook - An Urban Application of ISIS-ESTRY-TUFLOW

Robin Green, BWB

Project initiated as adaptation of an existing "strategic" EA ISIS-TUFLOW model of the Brandhall Brook in Sandwell (urban watercourse) for a site specific flood risk assessment. The model was used as tool to design a flood route though housing development--and has now evolved in to a Flood Alleviation Scheme for the wider community - model used as a tool to design and test flood attenuation area to remove original development from flood risk and offer benefit to local community (developer working in partnership with EA and Sandwell Metropolitan Borough Council). The FAS is currently in planning and preparing for DEFRA funding application.

Use of TUFLOW to Assess the Impact of Large Oil Tank Failure and Fire Suppression

Adam Parkes, CH2M Hill

Industrial sites are required to include design features which prevent pollution of the environment. For large petro-chemical storage facilities, PPG18 and CIRIAR197 are critical documents, defining the standard of protection to be provided in the even of storage failure and fire. Using a TUFlow model with variable geometry, we modelled the failure of several large storage tanks and subsequent application of fire suppression water to a bunded site to understand flow routes and depths during such an event, assisting with emergency planning, while also confirming the design standard of isolation bunds. (Presentation not available)

Unmanned Aerial Vehicles - A Cost-Effective Alternative to LiDAR

Annet Dude, Severn Partnership & Andrew Blogg, DandS

UAVs were developed for the military where they acquired the name, "drones" but recently the commercial sector has embraced the technology and experienced substantial growth particularly using micro UAVs. There are many terms for unmanned systems but the definition is essentially the same: UAVs are capable of operating without an internal pilot; are tethered by a radio control link; and can be pre-programmed for both flight and payload operations prior to launch. It is now possible to capture high resolution aerial data much more readily at a fraction of a cost of other methods currently available. Using a UAV, Digital Mapping and Survey have demonstrated accuracies very close to topographical survey standards. Where once a helicopter or Aircraft where necessary for capturing LiDAR Digital Terrain Model data, similar data can now be acquired using UAV technology. Digital Mapping and Survey will hopefully open up discussions about the potential use of this data as an alternative in hydraulic modelling.

Bristol City Council City Docks Study

John Young, Edenvale Young

The interaction between tidal inundation / storm surge and the river Avon and Frome in conjunction with the presence of the Bristol Floating Harbour means that the flooding mechanisms are highly complex. Bristol City Council in conjunction with consultants Mott MacDonald, Edenvale Young and Hyder Consulting has been undertaking an extensive study to evaluate the risks of fluvial flooding and tidal inundation the city which includes ISIS-TUFLOW modelling of the city centre and LEZ. The consultants have carried out condition assessments of the Floating Harbour's assets many of which are over 100 years old; with the objective of developing a coherent strategy for the future. The study has revealed that Bristol is particularly vulnerable to climate change.

Japanese Tsunami Benchmark Modelling

Phil Ryan, BMT WBM

Phil will be presenting a case study on the Japanese Tsunami of 2011 the sensitivity of the model associated with the hydraulic parameters and the use of TUFLOW FV for Tsunami modelling. (Presentation not available)

Using the QGIS Crayfish Plugin. An Alternative to SMS

Peter Wells, Lutra Consulting

The Crayfish plugin enables Quantum GIS (a popular open source GIS) to read 2D model results directly, allowing users to display time varying scalar and vector datasets in a similar manner to SMS and ISIS Mapper. In this presentation, the developers describe the plugin's current and future features as well as the platform on which it is based. (Presentation not available)

Modelling Road Gullies

Ruth Eabry, Capita Symonds

Ruth Eabry will be speaking about modelling road gullies, looking at the development of stage discharge curves to determine the amount of flow going into the 1d pipe network from the 2d surface.

Direct Rainfall Modelling in TUFLOW and 1D-2D - Model Emulation for Hydrological Analysis

Simon Jepps, Thomas Mackay

A case study presenting the use of direct rainfall modelling and 1D model emulation of 1D-2D models to aid design hydrological analysis in complex catchments. (Presentation not available)

The River Rother: Automated Generation of a Complex ISIS-TUFLOW-PIPE Model

Gerald Morgan, Edenvale Young

A case study in the automation of the generation of TUFLOW inputs including 1D 2D links, ESTRY networks and cross sections and hydrological inflow boundaries.

Modelling Pipe Networks

Phil Ryan, BMT WBM

An introduction and how-to to modelling pipe networks in ESTRY-TUFLOW. (Presentation not available)

Silly Errors in TUFLOW and How to Spot Them

Claire Wasiak and Peter Aylett, Edenvale Young

Some common errors seen when reviewing TUFLOW models and how to set up and operate a comprehensive review process for checking your and others' work. (Presentation not available

SME Workshop - Optimising your IT for TUFLOW Modelling

Gerald Morgan, Edenvale Young

Some thoughts on how to configure a small office for efficient use of TUFLOW (and ISIS). What do modellers need? What are the pros and cons of the different licensing schemes?

QGIS for TUFLOW

Peter Wells, Lutra Consulting & Peter Aylett, Edenvale Young

An introduction to the free, open-source QGIS software and how it can be used for TUFLOW modelling. (Presentation not available)

Multi-Dimensional Modelling - Session 1

Discussion of the key inputs and outputs from 1D, 2D and 3D modelling.

Case Studies - Session 2

Presentations of fluvial studies. Examining a site particularly vulnerable to Climate Change with complex flooding issues from a combination of fluvial systems and tidal inundation.

Schematising a model - Session 3

Discussion of what specific data are required to create your model and where such data may be sourced.

Case Studies - Session 4

Presentations of pluvial studies. Incorporation of rainfall, fluvial and storm water systems using 1D-2D linked modelling for multi-critera analysis of flood impacts.

TUFLOW FV - Session 1

TUFLOW FV is a 2D/3D flexible mesh, finite volume numerical model that simulates hydrodynamic, sediment transport and water quality processes in oceans, coastal waters, estuaries and rivers. The overview will introduce the concepts of flexible mesh modelling--how it differs from finite difference/fixed grid models (like TUFLOW), the advantages and disadvantages and when to use.

Urban Modelling - Session 2

Tips and tricks for modelling urban areas and pipe networks. Manhole energy losses explained and efficient ways of managing and setting up large pipe networks demonstrated. Different approaches for modelling overland areas including buildings and fences in 2D are also presented.

Enhanced Output - Session 3

How to make your TUFLOW model output much better! This workshop will give you GIS techniques for producing high quality flood maps, using the new XMDF files, and how to produce impressive 2D and 3D animations using SMS and ArcGIS.

TUFLOW 2012: New Features - Session 4

Bill Syme will give a brief overview of new features in TUFLOW for 2011. These include full .shp and .xmdf file support, ISIS-TUFLOW-PIPE (ISIS-ESTRY link), flexible output options, TUFLOW Wiki, new SA options, new infiltration options, new 1D structures, updated utilities, and more. He will also discuss the TUFLOW event and scenario features which offer the user a very powerful tool to the point where all simulations can be initiated using the one .tcf file.

Boundary Conditions - Session 1

This workshop will comprise a presentation on TUFLOW hydraulic controls and reliable representation of the physical process at outflow boundaries. This will be held in conjunction with a discussion on practical applications of fluvial and rainfall hydrology within a TUFLOW model.

Hydraulic Structures - Session 2

This workshop will be about methods for the modelling of buildings, fences and other hydraulic structures which have no explicit representation in TUFLOW. A variety of different techniques for representing buildings and fences in a two-dimensional domain will be presented, along with some of the pros and cons of each. Discussion in the workshop will then focus on the attendees' experiences of this aspect of urban modelling, how some of the methods can be implemented using commonly available data sources and which of the methods might be appropriate for any particular problems that the attendees might have.

Bridge Modelling - Session 3

This workshop will cover how to model bridge and culvert structures in TUFLOW using embedded ESTRY units, direct modelling in 2D and ISIS TUFLOW. The latest recommendations from various sources will be presented. There will be brief consideration for potential approaches to modelling bridges and there will be discussion of participants' experiences and problems with bridge modelling.

(Not Available) TUFLOW for Beginners - Session 1

The objective would be to introduce TUFLOW to new users so that they can understand the principles of TUFLOW and benefit from the rest of the day. This will cover the basics of setting-up a TUFLOW model and a discussion of TUFLOW file structures.

Developing Skills - Session 2

For more experienced users the objective would be to build on people's existing experience so that they are able to address more complex issues including optimising simulation times, TUFLOW hot-start/restarts, schematisation of boundary conditions, multiple domains and 1D linking to ESTRY. This workshop included some handouts (B&W).

Healthy Models & Debugging - Session 3

This workshop will concentrate on the production of healthy models including checking for terrain problems; tracking the causes of instability using TUFLOW diagnostics files and basic advice on building a healthy model such as 2D linking across embankments, boundary positioning, modifying time steps (when and when not to reduce), LiDAR patching and z shape merging, representation of ditches, parallel rivers and general good practice.

ISIS-TUFLOW Linking - Session 4

An interactive presentation relating to ISIS-TUFLOW linking and will cover the following subject areas: model preparation; data transfer between ISIS and TUFLOW; HX verses SX boundaries and fixing model instabilities at the interface of ISIS and TUFLOW. This will be supported by the use of worked examples.

TUFLOW 2011 and Beyond - Syme

Bill will present new features in TUFLOW for the 2011 release and beyond, and new on-line services such as the TUFLOW Wiki. Case studies will be used to demonstrate the features.

Bridge Obstruction in Lower Ely River - Yang

A linked 1D-2D ISIS-Tuflow modelling was carried out to predict the flood risk in Canton, Cardiff where historical flooding was recorded due to bank over-topping from the River Ely. The main challenge of the modelling was that the urban area exhibited highly variable topographical elevations at a number of junctions between railway, highway and the residential streets. An additional challenge came from the river bridge that presents a significant obstruction in the river cross-section. The ISIS-Tuflow model was therefore targeted detailing the complexity of the local topography and representing the bridge to create a highly accurate local model to assist with the NEECA2 flood mitigation scheme. The model was calibrated using recorded hydrometric and historical property flood data. It is encouraging that the calibration indicated satisfactory agreements between the historical data and the modelling results. This flood modelling application concludes that Tuflow is one of the best practice tools for modelling urban flooding.

ISIS-TUFLOW-PIPE Link - Adams

The ISIS-TUFLOW link has been extended due to popular demand to include a link the 1-d component of TUFLOW (ESTRY). This development, which became available in early October, enables the complementary strengths of ISIS and TUFLOW to be used together in the same model. Konrad will give an overview of the development and usage of ISIS-TUFLOW-PIPE link, and other recent enhancements, and provide examples of its applications.

Rating Curve Assessments - Craig

There are various methods available for rating curve assessment and extensions, including 1D, linked 1D-2D and 3D modelling. The presentation will discuss the strengths and limitations of different methods with respect to a range of situations, using specific sites to show examples of some good practice and share some pitfalls that you may wish to avoid.

Cambridge SWMP - Young

John Young will discuss the direct rainfall modelling undertaken for the Cambridge Surface Water Management Plan paying particular attention to the post processing of the output of the data. This will include evaluation of flood damages, economic analysis and assessment of engineering options to generate a long term strategy for the alleviation of surface water flooding in Cambridge.

Queensland Floods: Where to from here? - Syme

The Queensland floods of January 2011 were the worst in over a century. Bill will delve into his other passion: the need for proactive floodplain management. He will discuss what was learnt and where to from here.

Application of TUFLOW FV to River and Storm Surge Modelling - Nielson

Chris Nielsen and Phillip Ryan will discuss TUFLOW-FV and how it has been used to model a variety of physical processes, including coastal hydraulics, ocean currents, river flooding and storm surge and, more recently, 3D flows in rivers and 3D water quality. Case studies of 2D storm surge modelling and 3D river modelling are presented in this session.