SEDIMENT TRANSPORT BY DAM-BREAK WAVES RELATING TO WAVE RUNUP AND TSUNAMI

While sediment transport under wave runup has previously been investigated (e g O’Donoghue et al 2016) through the ‘natural’, accelerated scenario on sloping beds, the present study presents data from quasi steady dam-breaks on horizontal beds, which due to greater simplicity provide a good opportunity for gaining fundamental insights. The present study used the same flume as Nielsen et al (2022), which showed the usefulness of Stoker’s steady shock concept for investigating the effects of bed friction on shock propagation. A 1.5m loong sand bed was added, starting at a distance from the dam, where the previous experiments indicated quasi-steady shock propagation.