The TUFLOW Link. Past, Present and Future. Stephanie Dufour
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1 The TUFLOW Link Past, Present and Future Stephanie Dufour
2 Contents PAST Software background Thames Embayments Inundation Study PRESENT Flood Modeller -TUFLOW link Flood Modeller - ESTRY link FUTURE Tutorial model Development & Support
3 The Past
4 The TUFLOW Link Past Flood Modeller The 1D component first developed in the 1970 s Designed to model flows and levels in open channels and floodplains First commercially released in 1995 TUFLOW The 2D component developed since 1989; the 1D component (ESTRY) since the 1960 s Designed to model flow and inundation patterns in floodplains, estuaries, rivers and urban areas First commercial sale in 2001 Driver for a linked 1D-2D solution a result of the Environment Agency s Thames Embayments Inundation Study (2004)
5 The TUFLOW Link Past Thames Embayments Inundation Study Over 100km 2 (23 embayments) around London at risk of storm tide flooding during an extreme event EA required a modelling tool to predict inundated area following breach / overtopping of defences Benchmark testing undertaken on four software packages: Flood Modeller (predecessor) Quasi-2D (1D network) model LISFLOOD-FP 2D raster routing model TUFLOW Fully 2D regular grid hydrodynamic model TELEMAC 2D Fully 2D irregular grid hydrodynamic model
6 The TUFLOW Link Past Benchmark Testing Testing assessed breach and overtopping scenarios for the Greenwich embayment Selection of flood modelling package considered: Comparison of predicted flood depths and extents Ease of model setup, stability and run times Test Conclusions Flood Modeller and TUFLOW selected in combination as they fulfilled the requirements of the study Flood Modeller: fast run times and existing calibrated model of tidal Thames TUFLOW: stability and established 1D/2D linking capabilities Flood Modeller and TUFLOW codes merged in 2004 as part of Stage 2
7 The TUFLOW Link Past The rest is history!
8 The Present
9 The TUFLOW Link Present Two link types available Flood Modeller (1D) -TUFLOW (2D) link Original link HX Boundary: Head supplied externally to TUFLOW SX Boundary: Source flow supplied externally to TUFLOW Flood Modeller (1D) ESTRY (1D) link Developed from 2010 X1DH Connection: external 1D Head supplied to TUFLOW X1DQ Connection: external 1D Flow (Q) supplied to TUFLOW
10 The TUFLOW Link Present HX Boundary Link Typically used along banks of open channel Flood Modeller provides the water level, TUFLOW returns a flow The elevation of the HX boundary determines when the spill first occurs Volume of water entering / leaving the 2D domain is subtracted / added from the 1D model to preserve volume
11 The TUFLOW Link Present SX Boundary Link Typically used to connect 1D structures to the floodplain Flow entering / leaving the 2D domain is calculated by Flood Modeller taking into account the average 2D TUFLOW water level along the boundary Any 2-noded 1D Flood Modeller unit may be used (i.e. spill unit) A dummy HTBDY unit is digitised at the downstream end
12 The TUFLOW Link Present X1DH Link Typically used where the ESTRY component discharges to Flood Modeller Flood Modeller sends ESTRY a water level ESTRY sends a (+/-) flow back to Flood Modeller The Flood Modeller unit on the receiving end of an X1DH connection must be a channel unit Link is formed when an ESTRY node is snapped to a Flood Modeller node
13 The TUFLOW Link Present X1DQ Link Typically used where Flood Modeller discharges to ESTRY Flood Modeller sends ESTRY a (+/-) flow ESTRY sends a back a water level to Flood Modeller Link is formed when an ESTRY node is snapped to a Flood Modeller node (channel unit)
14 The TUFLOW Link Present Viewing / Checking the Information Exchange Flood Modeller The flow / water level time-series calculated by Flood Modeller / TUFLOW using X1DH or X1DQ link types may be viewed in the standard results file (*.zzn) The flow exchange over an HX or X1DH link type may be viewed by outputting the supplementary results file (*.zzx) TUFLOW x1d_nodes_check / x1d_chans_check GIS layers containing location of external 1D nodes / channels The optional command Write X1D Check Files outputs.csv files containing flow / water level time-series of flow to and from Flood Modeller Volumes of water in / out of 2D domain via X1DH / X1DQ links presented within _MB1D.csv
15 The Future
16 The TUFLOW Link Future Flood Modeller TUFLOW Tutorial Model Demonstration of all available linking methods Full documentation Clarity on linking methodology Guidance on troubleshooting GIS packages and Flood Modeller GUI Ability to be simulated license free Joint collaboration
17 The TUFLOW Link Future Continued Partnership Approach Software Development Further integration of TUFLOW with Flood Modeller GUI Increase workflow efficiencies Ongoing R&D: Ideas from users! Software Support Joint delivery of technical support services to the Flood Modeller and TUFLOW user communities
18 Thank You
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