Abstract
Tutukaka Harbor is located on the east coast of New Zealand, approximately 140 km north of Auckland. At the head of the harbor is Tutukaka Marina which is a popular focal point for maritime recreation and an important economic driver for the area. Tutukaka Harbor is a well-known tsunami ‘hot spot’ as the irregularly shaped harbor is known to amplify incident tsunami energy due to resonance (Borrero and O’Neill, 2019). The objective of this study is to investigate a possible reconfiguration of the entrance to Tutukaka Marina to reduce the severity of tsunami induced currents. Over the years, breakwaters have been constructed narrowing the entrance to the marina. While the breakwaters are effective in blocking wind and swell wave energy, they have had the unintended consequence of enhancing tsunami induced currents forced through the narrow (60 m wide) gap.
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