THE BENCHMARK
The benchmark is divided in two steps:
- A blind step, whereby modellers are given the input data and provide raw numerical results;
- A tuning step, whereby modellers are given the measured data, are allowed to tune parameters, and provide revised numerical results.
Two test conditions are proposed, both involving failure by overtopping:
Test T1 – homogeneous dam
Test T2 – zoned dam
DATA FOR THE BLIND STEP
For all test conditions, the following data will be given to registered modellers:
- Initial dam geometry (including initial notch) and detailed channel geometry, including inlet an outlet (see example on Figure 1);
- Data concerning geotechnical characterization of the embankments;
- Monitoring variables, including, a water level time series in the upstream reservoir and the inlet flow discharge.
- Images of the breaching process, test T1 – homogeneous dam.
- Images of the breaching process, test T2 – zoned dam.
MODEL VALIDATION
Validation consists in quantifying the differences between measured and computed, namely in the breach hydrograph, breach width and velocity time series at specific locations (in test T2).
