1. Overview
2. Field Modelling of Embankment Failure
3. Laboratory Modelling of Embankment Failure
4. Numerical Modelling of Embankment
Failure
5. Breach Location
The scope of work under this part of
the IMPACT project covers 4 main areas. These are:
- Field modelling of embankment failure (6m
embankments)
- Laboratory modelling of embankment failure (0.6m embankments)
- Numerical modelling of embankment failure
- Breach location
The objective of this work is to improve our
ability to predict breach formation and breach location. The
aim of the work is to provide large scale (field) data and
smaller scale laboratory data against which numerical models
may be tested and developed. Comparison of large and smaller
scale tests also allows the investigation of scale effects
and determination of the applicability of smaller scale (less
expensive) laboratory tests.
For general enquiries regarding the Breach
Formation work, please contact Mark
Morris
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2. Field Modelling
of Embankment Failure A series of 5 field tests will be undertaken
at a test site in Norway. The site permits the construction
of a 6m high, 30m wide embankment, retaining some 100,000m3
of water. This will then be breached under monitored conditions
providing information on the breach formation process for
a variety of embankment geometries and materials.
For more information on this work see:
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3. Laboratory Modelling
of Embankment Failure
A series of 5 field tests will be undertaken
at a test site in
Norway. The site permits the construction of a 6m high, 30m
wide embankment,
retaining some 100,000m3 of water. This will then be breached
under
monitored conditions providing information on the breach formation
process
for a variety of embankment geometries and materials"
for "To complement the
field modelling, a series of 22 laboratory tests at 1:10 scale
have been
undertaken. These tests have been used to compare against
and extrapolate
the field data.
For more information on this work see:
4. Numerical Modelling
of Embankment Failure A programme of numerical (breach) model
comparison and development has been established to use the
field and laboratory data outlined above. The objective
of the model comparisons is to identify model performance
and the most effective approach to modelling breach formation.
Comparison of model performance will be made through a series
of controlled tests. Modellers will be asked to simulate
failure of various embankment 'conditions' and results will
be collated and subsequently compared against observed field
or lab data.
Modelling is being undertaken by selected
members of the IMPACT project team. However, the value of
model comparison is significantly enhanced by additional participation
in the modelling programme from modellers worldwide. Participation
in this programme is open to any organisation. Field and laboratory
data for the various embankment failure tests will be made
freely available on the basis of participation in the modelling
programme (i.e. submission of modelling results for comparison
against other results).
In order to maintain an objective programme of model comparison,
benchmark tests, datasets etc.
are released to individual modellers to a predefined programme.
We welcome wider participation
in this programme.
For more information on this work see:
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The objective of this work package is to
try and identify whether the likely mode and location of a
breach in a long length embankment can be established in relative
risk terms. This would allow owners of large lengths of flood
embankment to prioritise maintenance works according to the
risk of breaching. A tool or methodology for predicting relative
risk/location will be developed.
The programme of work will include the following stages:
- Literature review to establish current stage of art with
respect to factors affecting breach location
- Consultation with national bodies responsible for flood
defence seeking case study material and information relating
to location factors.
- Analysis of case study material. Identification of key
contribution factors, their relative occurrence and relative
importance in determining breach location.
- Development of a practical methodology for assessing the
relative risk of breaching at a given location, or along length
of flood defence embankment.
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