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IMPACT ~ Breach Formation (WP2) . Overview (4th IMPACT WS). Breach Formation The Problem to be Solved - AIMS. Problem to solve: The reliable prediction of breach formation (and hence potential: flood hydrograph / flood risk breach size Approach to identifying potential breach location. - PowerPoint PPT Presentation
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IMPACT ~ Breach Formation (WP2)
Overview(4th IMPACT WS)
Breach Formation The Problem to be Solved - AIMSProblem to solve:
• The reliable prediction of breach formation (and hence potential:
– flood hydrograph / flood risk
– breach size
• Approach to identifying potential breach location
Breach Formation The Approach
The overall approach entails combining large scale field work, lab work and numerical model development / application.
5-6m embankments
1:10 scale embankments
Multi-partner
Multi-model
Field Modelling
Lab Modelling
Numerical Modelling
Desk / Data Analysis for Breach Location
Breach Formation Work ProgrammeYear 1:
• 2 x 6m field tests in Norway
• 9 x 0.6m lab tests at Wallingford
• Widen numerical modelling team and integrate modelling programme with field and lab
10:25
11:27
12:23
13:05
Breach Formation Work ProgrammeYear 2:
• 3 x 6m field tests in Norway
• 13 x 0.6m lab tests at Wallingford
• Numerical modelling integrates with field and lab modelling
• Initiate breach location work (factors and methodology)
Breach Formation Work ProgrammeYear 3:
• Finalising numerical modelling comparisons
• Breach location (factors and methodology)
• Application to combined risk assessment / uncertainty
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0 1000 2000 3000 4000 5000 6000 7000 8000Time (sec)
Dis
char
ge (m
^3/s
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Wid
th (m
)
Outflow clayInflow clayOutflow moraineInflow moraineBreach Top Width clayBreach Top Width moraine
Breach Formation Direction of work:Analysis of this data permits:
• Consideration of scaling differences between field and lab data
• Comparison of controlled test results against observed field data
• Objective performance assessment of multiple numerical models predicting breach formation
• Base data for validation and model development
Breach Formation Deliverables (Overview)Deliverables:
• Field and lab data on breach formation– different geometries & materials
• Comparison and development of breach models• various partner models
• model interface for direct comparison
• commercial products
• Approach for identifying potential breach location
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