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The IMPACT work programme divided into five main areas. Four of these addressed specific flood processes, whilst the fifth considered the uncertainty associated with these processes.
WP 2: Breach Formation:
Investigation of breach formation processes.
Work includes understanding the formation processes, prediction
of breach formation rate (and hence flood hydrograph) and
prediction of breach location. Research combines field modelling
(controlled failure of 6m high embankments) with laboratory
modelling (failure of 0.6m high embankments) and numerical
model development (comparison of breach model performance
worldwide).
WP 3: Flood Propagation:
Investigation of extreme flood propagation
processes. Work divides broadly into two areas covering the
simulation of flood wave (dambreak etc.) propagation along
real valleys and methods for the simulation of flood flow
through urban areas.
WP 4: Sediment Movement:
Investigation of sediment movement under extreme
flood conditions. Work focuses on fundamental sediment processes
occurring in both the near and far fields - relative to the
source of flooding (e.g. dam failure, embankment breach etc.).
WP 5: Process Uncertainty:
The uncertainty associated with predicting
the processes under WP2, 3 & 4 will be determined both
individually and when combined, as is typically undertaken
when predicting potential flood conditions within a catchment
or valley system. Implications for end user applications (such
as emergency planning) will also be assessed.
WP 6: Geophysics and Field Data:
Monitoring of the in situ embankment condition
(i.e. at a real embankment dam in Czech Republic and at the
field test for WP 2) will enable verification of the test
results for both field tests and numerical modelling and the
different monitoring approaches. Collation and analysis of
case study data will both support the work undertaken in the
other themes and will allow more in depth analysis of breach
formation processes and factors contributing to breach location.
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