Abstract
Historic high-energy deposits are useful in determining the local magnitude of their high-energy events using inverse modelling method. Unfortunately none of the models are applicable for cliff-edge boulder/block because pre-transport arrangement, and array of fluid forces/moment applied to the block are different. Evidence for cliff-edge block transport by tsunamis and/or big storms on cliff-tops has been found in the literature. In this study, simple equations to model threshold entrainment of cliff-edge block by tsunami flow (also applicable to storm flow) and then the limitations and sensitivity of the models' parameters on the results are discussed. From the analysis of the modeling results, it is confirmed that the coefficient of lift plays a key role in determining the minimum flow velocity. It also found that transport mode varies with both the shape of block and the size of the coefficient of lift. Controlled, large scale experimental studies are needed to calculate accurate coefficients of lift and to validate the predictions by the models in future. Further, modern high-energy deposits for which both the flow conditions and parameters of blocks are known are also useful to check the practical validity of these numerical models.
| Original language | English |
|---|---|
| Pages | 604-608 |
| Number of pages | 5 |
| Publication status | Published - 2015 |
| Externally published | Yes |
| Event | Australian Coasts and Ports 2015 Conference - Auckland, New Zealand Duration: Sept 15 2015 → Sept 18 2015 |
Conference
| Conference | Australian Coasts and Ports 2015 Conference |
|---|---|
| Country/Territory | New Zealand |
| City | Auckland |
| Period | 9/15/15 → 9/18/15 |
Keywords
- Boulder
- Flow velocity
- Modeling
- Tsunami
ASJC Scopus subject areas
- Ocean Engineering