Coastal Morphology at Perranporth: Beach User Perception versus Argus Video Imagery.

This paper begins the process of addressing a lack of research into the understanding of beach user perception, in relation to beach morphology at Perranporth, Cornwall. The Wave Hub: an initiative to harness wave energy from the marine environment has sparked a negative reaction from a group of local surfers. It has been suggested that the device will cause a decrease in wave activity and wave height. This has the potential to affect coastal morphological processes and strengthen rip activity. Rip currents are the primary hazard facing ocean swimmers. Cornwall is a popular tourist destination; the county relies heavily on tourist influxes to sustain the local economy, therefore, beach safety is of the highest priority. The data was generated using both qualitative and quantitative methods. An interview was undertaken to provide an insight into beach user perception of beach morphology governing three intertidal features: rip currents, sand bars and erosion/accretion. Beach user perception was compared to reality using Argus imagery. This was achieved by classifying low tide Argus images based on surface composition to determine the presence and quantity of rip currents. The results indicate that beach user perception at Perranporth, parallel what is occurring in reality, specifically regarding rip currents. Local people, who visit the beach regularly, have knowledge of their environment and perceive it in a realistic manner; as confirmed by Argus data. Argus imagery emphasised that Perranporth is a dynamic, mobile environment and prone to constant change. Specific beach users (those trained in beach safety) had a deeper level of understanding regarding beach morphology, in comparison with general beach users due to training and education. The implications of these findings highlight that an individual’s perception should be valued, as they have an accurate understanding of their local surroundings. The data generated provides evidence which can be utilised during stakeholder consultations relating to the installation of Wave Hub devices and future coastal developments, whilst also providing a baseline for future research