Abstract
A newly developed Conductivity Concentration Profiler (CCP), capable of rendering a 29-point sediment
concentration profile at 1 mm vertical resolution, was deployed on a macrotidal beach in Perranporth, UK, as part of a
comprehensive field study on swash zone hydrodynamics and sediment transport. Initial field results show the
occurrence of sheet flow during both the uprush andbackwash phases of the swash cycle. Concentration profiles in
the sheet flow layer are approximately linear, witha power-law tail at the top of the layer. The datasuggest that shear
stresses are the dominant forcing for sediment mobilization, but pressure gradients provide a secondary mobilization
mechanism.
concentration profile at 1 mm vertical resolution, was deployed on a macrotidal beach in Perranporth, UK, as part of a
comprehensive field study on swash zone hydrodynamics and sediment transport. Initial field results show the
occurrence of sheet flow during both the uprush andbackwash phases of the swash cycle. Concentration profiles in
the sheet flow layer are approximately linear, witha power-law tail at the top of the layer. The datasuggest that shear
stresses are the dominant forcing for sediment mobilization, but pressure gradients provide a secondary mobilization
mechanism.
| Original language | English |
|---|---|
| Title of host publication | International Conference on Coastal Engineering |
| Subtitle of host publication | Proceedings of 33rd Conference on Coastal Engineering, Santander, Spain, 2012 |
| Editors | P Lynett, J M McKee Smith |
| Number of pages | 7 |
| Volume | 33 (2012) |
| Publication status | Published - 2 Jul 2012 |
Keywords
- swash zone
- sediment transport
- sheet flow