Abstract
Infragravity waves, generated by nearshore wave-wave interaction, potentially increase the coastal hazard. Lack of detailed observation of nearshore wave fields however makes it difficult to fully understand the behavior of infragravity waves under wave-wave interactions. These days, UAVs (Unmanned Aerial Vehicles) have enabled us to easily capture the top-view images of the dynamic nearshore behavior with sufficiently high spatial and temporal resolutions. In this study, we conducted UAV-based observations of cross-shore variations of wave spectral characteristics to clarify the nearshore wave-wave interactions.
Highlights
Infragravity waves, generated by nearshore wave-wave interaction, potentially increase the coastal hazard
Two dominant components are found in the offshore wave spectrum: the swell component of around 0.08 Hz and the wind-wave component of 0.14 Hz
The wind-wave component is dominant over the swell component while it is significantly reduced at the onshore location probably due to wave breaking on the offshore sand bar
Summary
INTRODUCTION Infragravity waves, generated by nearshore wave-wave interaction, potentially increase the coastal hazard. Lack of detailed observation of nearshore wave fields makes it difficult to fully understand the behavior of infragravity waves under wave-wave interactions. These days, UAVs (Unmanned Aerial Vehicles) have enabled us to capture the top-view images of the dynamic nearshore behavior with sufficiently high spatial and temporal resolutions.
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