Jean-Paul CHABARD

IAHR Vice President

Jean-Paul CHABARD

IAHR Vice President

Applications of the Telemac-Mascaret1D/2D/3D Open Source Flow Modelling

System to floods events

IAHR Vice PresidentEDF R&D Project Manager

IAHR Vice PresidentEDF R&D Project Manager

Presentation of the Telemac-Mascaret 1D/2D/3D

Presentation of the Telemac-Mascaret 1D/2D/3D Telemac-Mascaret 1D/2D/3D

Open Source Flow Modelling System

Telemac-Mascaret 1D/2D/3D Open Source Flow Modelling System

Assumptions

Flow with one principal direction

Subcritical or transcritical flow

Flood plains can be modeled with storage areas : a simple way to model flood plains in some studies

MASCARET Hydraulic modellingMASCARET Hydraulic modelling

Well adapted for large domain simulation

Gain on geometric data and on study time

Singularities simply integrated

Complementary of 2D and 3D simulations

MAIN

CHANNELFLOOD

PLAIN

STORAGE

AREAS

FLOOD PLAIN FLOOD PLAIN

MASCARET :Functionalities of hydraulic components

MASCARET :Functionalities of hydraulic components

Three 1D hydraulic components based on the solution of the shallow-water equations

Unsteady subcritical flow (finites differences 1970)

Steady transcritical flow

Transcritical unsteady flow - non hydrostatic waves

(Explicit and implicit finite volumes scheme) (Explicit and implicit finite volumes scheme)

Dry areas - 2D modelling of the junction

Full network of rivers and channels storage areas

Singularities (weir,)

Boundary conditions : Discharge or level imposed stage-discharge relation

Free outflow

Control of flow changement to domain inflow

Coupled with transport pollutants Tracer Water quality library

Sediment

2 dimensions 3 dimensions

Hydrodynamics

Water quality

TELEMAC-2D TELEMAC-3D

SISYPHE*

Chaining with Delwaq

TELEMAC-3D

SPH (2D or 3D)

SPARTACUS

The TELEMAC hydroinformatic system

Chaining with Delwaq

Laboratoire National dHydraulique et Environnement5

BIEFFinite Elements Library

Fudaa / Rubens / Blue KenueTecplot

Pre- and post-processors

Matisse / Janet

Mesh generators

Groundwater flows

Water quality

waves

Chaining with Delwaq

ESTEL-2D ESTEL-3D

ARTEMIS

TOMAWAC

Chaining with Delwaq

* Co-property LNHE-Cetmef

The Telemac system

Main characteristics

Developed since 1987 at EDF R&D / LNHE

World distributed (first commercial with 200 licences, now freeware and open source)

FORTRAN 90, PERL, MPI

Based on unstructured grids

E

N

S

O

Laboratoire National dHydraulique et Environnement6

Based on unstructured grids

Documentation and validation

Key features Finite Elements, Implicit schemes

Parallelism with domain decomposition

Dry zones

Non hydrostatic 3D with free surface

Installations all around the world

South-Africa, Germany, Argentina, Belgium, Brazil, Canada, China, South Korea, Croatia, Duba, Egypt, Spain, United States, Finland, France, Greece, Holland, India, Iran, Ireland, Italy, Japan, Jordania, Lebanon,

Malaysia, Morocco, Poland, Portugal, Romania, Russia, Serbia, Singapore, Switzerland, Thaland, Tunisia, Turkey, Vietnam

French consultants

BCEOM, BRL, Canal de Provence, CEA, CETMEF, CNR, CREOCEAN, IX Survey, Mto France, Ocanide, Optimer, Port autonome de Nantes, Port autonome de Rouen, Safege, Stude, SHOM, Sogreah, Veolia

Laboratoire National dHydraulique et Environnement7

Optimer, Port autonome de Nantes, Port autonome de Rouen, Safege, Stude, SHOM, Sogreah, Veolia

Universities

UK : Bangor, Birmingham, Bradford, Bristol, Cambridge, Cardiff, East-Anglia, Exeter, Glasgow, Heriot-Watt, Lancaster, Liverpool, London, Loughborough, Manchester, Nottingham, Plymouth, Portsmouth, Reading,

Southampton, St Andrews

Germany : Hannover, Stuttgart, Karlsruhe, Universities

http://www.opentelemac.org

3500 registered users

7500 messages on the forum

Laboratoire National dHydraulique et Environnement8

108 countries

130 persons in 2011 user club in Paris

20th user club 16-18 October 2013 in Karlsruhe

A consortium to provide manpowerand steer developments

A consortium to provide manpowerand steer developments

A first circle of industrial, engineering, institutional, academic partners willing to reinforce/enhance the development of the system, and ensuring the industrial quality and validation standards.

The group decides the integration process and development plan, promotion and assistance, and engage resources/responsibility for developments, integration of new features, documentation, validation, promotion ). Minimum resources: 2 persons/year

A steering committee, advised by a scientific committee :

Decides the technical, strategic and further developments orientations, as well as the valorisation strategy

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Defines the priority in the common developments and way of doing them (internal resources of the members, call to Open source community, .)

Checks if the developments fulfil the desired quality standards (validation and documentation)

A specific internet site for the consortium:

To deliver and download the new reference versions

To call Opensource community for new developments

To receive new developments from the community

To animate the community Forum of users

2D Hydrodynamics

Telemac-2D

Shallow water equations (Saint-Venant)

Boussinesq equations

Meshes of triangles

Dry zones

Turbulence models

Laboratoire National dHydraulique et Environnement10

Turbulence models

Tracers (temperature, pollutants, etc.)

Weirs

Culverts

Sources and sinks

Open boundary conditions

3D Hydrodynamics

Telemac-3D Navier-Stokes equations

Meshes of prisms (superimposed 2D meshes)

Non hydrostatic 3D with free surface

Dry zones

Turbulence models

Laboratoire National dHydraulique et Environnement11

Turbulence models

Tracers (temperature, pollutants, sediment)

Some applications to dam break and river flood

Some applications to dam break and river flood

Some applications to dam break and river flood

modelling

Some applications to dam break and river flood

modelling

Main objectives Conception of dams and river

waterworks Forecasting for population safety

Dam break and river flood modelling

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Protection of industrial areas Damage estimation River basin management etc.

Flood in river Loire near Dampierre

Laboratoire National dHydraulique et Environnement14

Real case : The Rhine river

1D- 2D shallow-water coupling1D- 2D shallow-water coupling

Frameworks : Salom Coupleur Yacs - Juin 2012

Confrence ICHE accepted paper A possible coupling of 1D and 2D models to solve free-surface flow problems ,

Environmental modelling and software, Malleron N., Zaoui F, NG

Extreme flood in the Rhne valleyExtreme flood in the Rhne valley

Global model of Rhne valley : domain of 360 km

Complex hydraulic study with 1D/2D models

Study of extreme flood for the protection of fluvial nuclear power

2D model

protection of fluvial nuclear power plant

The Vouglans dam-break (Ain) : dam-break wave simulation study with propagation on 100-year return flood

1D model with storage areas and composed channel

Local 1D model with storage areas

Global 1D model

Vouglans dam

ContextThe Bugey nuclear power plant,located on the Rhne, is protectedagainst severe floods combinedwith a possible failure of theVouglans dam on the Ain river.

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Dyke break on river Rhne (study by Compagnie Nationale du Rhne)Dyke break on river Rhne (study by Compagnie Nationale du Rhne)

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1D Simulation with Mascaret1D Simulation with Mascaret

A large number of studies :

Studies on EDF river dams concerned by safety procedures : 9000 km of French valleys modelled

International diffusion : Hydro-Qubec, SNC-Lavallin

Malpasset dam break

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Malpasset dam, 48 million m3, brokeon 2 December 1959, there was433 casualties.

Dam for irrigation, not EDF property

Malpasset dam break Malpasset dam break

Real test for CADAM (Concerted Action on Dam break modelling)

Fiel data :

Time propagation :

Shut down of 3transformers

Fielddata(s)

Wave arrival time

(1D)

A (1400) 100 91.4

B (9200) 1240 1221

Wave arrival time

(2D)

110.5

1287

Physical model : Maximum flooding

0

10

20

30

40

50

60

70

80

90

0 2000 4000 6000 8000 10000 12000

Abscisse (m)

Co

te (

m)

Field data

V7P0 with head loss

C (10500) 1420 1467 1435

Malpasset dam break

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Malpasset dam break

Laboratoire National dHydraulique et Environnement24

3D simulation with 6 planes on the vertical3D simulation with 6 planes on the vertical

Computer times in Malpasset test-caseComputer times in Malpasset test-case

Telemac-2D Telemac-3D

2 planes on the vertical =

1 layer of elements

Linux

1000 time steps of 4 s eachmesh with 26000 elements

Laboratoire National dHydraulique et Environnement26

HP Z600

1 proc.

22 s 112 s

Linux

HP Z600

8 proc.

4 s 20 s

(computer time in 1993: 86400 s)

Ratio Navier-Stokes/Saint-Venant = 5

A dam break application with cars and people(Canadian Hydraulic Center)

Laboratoire National dHydraulique et Environnement27

Lagrangian Smooth Particle Hydrodynamics

method (SPH) : a promising

Lagrangian Smooth Particle Hydrodynamics

method (SPH) : a promising method (SPH) : a promising tool for dam break and river

flood modelling

method (SPH) : a promising tool for dam break and river

flood modelling

For complex problems out of reach of mesh based CFD complex free surface flows multi-phase flows fluid-structure interactions

Lagrangian Smooth Particle Hydrodynamicsmethod SPH

Laboratoire National dHydraulique et Environnement29

Aims: Dimensioning dykes Designing spillways

3 D model

Schematic dam break

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Experiment

2 D model

Smooth Particle Hydrodynamics

First simulation of a real spillway

(Goulours dam)

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Costal flood modellingCostal flood modellingCostal flood modellingCostal flood modelling

Storm Xynthia in Charente (France)

26 February-1st March 2010

Tide coefficient 102Wind160 km/h

Storm surge 1,5 m59 casualties

20/09/2008 Laboratoire National dHydraulique et Environnement33

Study performed by Artelia

Would be flooding at Saint-Malo

SOGREAH

Laboratoire National dHydraulique et Environnement34

topograhy

SOGREAH

ContextThe city of Saint-Malo is subject tosevere storm surges combined withhigh wind waves, capable of strongovertopping through harbour defences

Would be flooding at Saint-Malo

Finite element mesh(56000 elements)

Laboratoire National dHydraulique et Environnement35 SOGREAH

Conclusion

Serious challenges to face

A diversity of promising methods

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36

End of the 3D is too expensive anthem

Stop working on simplified equations

The end

Laboratoire National dHydraulique et Environnement37

Thank you for your attention