“Research in dam breaching". Sílvia Amaral PhD Student (1 st year) December, 14 th 2009. Unfortunately these studies failed to produce detailed phenomenological information on the breaching processes. Interaction between hydrodynamic erosion and geotechnical failure (Wahl, 2004).
“Research in dam breaching"
PhD Student (1st year)
December, 14th 2009
Unfortunately these studies failed to produce detailed phenomenological information on the breaching processes
Interaction between hydrodynamic erosion and geotechnical failure (Wahl, 2004)
Description of the geotechnical discrete failure episodes
Although overtopping is the most common cause of failure in recent dams, there is still an evident need of reliable prediction tools to assess the flood impacts in river floodplains following dam failure
Dam failure by overtopping have been object of several laboratory studies (Vaskinn et al. 2004) that have provided useful data like discharge hydrographs for model validation
Laboratorial Work to collect data for the empirical characterization of the main hydrodynamics and geotechnical phenomena
Theoretical Work to guide the empirical work
We believe that the improvement of the current ability for reliable prediction of breach formation by overtopping and its evolution in earth embankments can only be achieved by synthesizing hydrodynamic and geotechnical phenomena into detailed conceptual models
Provide empirical data that can be used to access the most important parameters that influence breach formation and flow hydrograph shape
zone of the embankment
Slope to guide sediments to the collection basin
geotechnical instabilization should depend on reduction of suction head – this may be directly assessed.
experimental studies have not attended to some geotechnical aspects as compaction energy of the embankment layers (one, to this date…)
such work can only be performed within a multidisciplinary research group
underwater camera collecting a footage of the trace generated by a 0.2 w laser
elevation: level acoustic probes
Pilot Facility (1/2)
Pilot Facility (2/2)
- synchronization of instrumentation