On Dam Failure Induced Seismic Signals Using Laboratory Tests and on Breach Morphology due to Overtopping by Modeling

Dam models were constructed in an indoor flume to test dam breach failure processes study the seismic signals induced. A simple model was also proposed estimate hydrographs for floods. The results showed that when retrogressive erosion due seepage of continues, it will eventually reach crest at upstream side dam, and then trigger overtopping breaching. corresponding events during evaluated. Characteristics analyzed by Hilbert–Huang transform. Based on characteristics signals, we found four types mass movement process, i.e., single, intermittent, successive slides fall. There precursor caused cracking immediately before sliding dam. Furthermore, modeling coincided well with field observations. From results, confirmed discharge lateral masses are among important factors influencing evolution breach. In addition, widening rate decreases decreased discharge. can be a useful tool warning hazard reduction.