Sediment banks within a fast-flowing tidal channel, the Inner Sound in the Pentland Firth, are mapped using multi-frequency side-scan sonar. This novel technique provides a new tool for seabed sediment and benthic habitat mapping. The sonar data are supplemented by sediment grab and ROV videos. The combined data provide detailed maps of persistent sand and shell banks present in the Sound despite the high energy environment. Acoustic Doppler Current Profiler data and numerical model predictions are used to understand the hydrodynamics of the system. By combining the hydrodynamics and sediment distribution data, we explain the sediment dynamics in the area. Sediment particle shape and density, coupled with persistent features of the hydrodynamics, are the key factors in the distribution of sediment within the channel. Implications for tidal energy development planned for the Sound are discussed.
|Journal||Journal of Marine Science and Engineering|
|Publication status||Published - 8 Apr 2016|
- Sediment transport
- settling rates
- tidal energy
- Pentland Firth
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- Environmental Research Institute - Post Doctoral Research Associate
- Aquaculture Research Network
- Energy Innovation Team
Person: Academic Research Active