Effects of flow-bed interactions on barrier impact

Debris flow mobility is governed by complex interactions at the flow-bed interface. These may cause bulking and increase in momentum. Both factors need to be considered for design of barriers installed along path. In this study, channelized debris over a wet erodible bed impacting terminal flexible barrier modelled 28-m-long 2-m-wide flume facility with 20o slope inclination Hong Kong. Tests volumes 6 m 3 9 overriding both non-erodible beds are conducted. The change normalised energy section, momentum impact dynamics on assessed.