Pilot Model Study for the Design of Hilo Harbor Tsunami Model: Hydraulic Model Investigation

摘要

Tests were conducted on a pilot model of Hilo Bay to determine whether distortion of scales was appropriate for a tsunami model. The test results showed that a distortion factor of three had negligible effect on the amplification factor and location of bores within the bay. The tests also showed that a resonant model ocean area was not required for proper generation of the bores. A simple rise and fall of water surface at the bay mouth created a strong wave amplification within the bay if the period of oscillation was near that computed for resonant response of the bay. This period depends only on the geometry of the bay. Absorbers can be used between the wave generator and the bay mouth to reduce re-reflected waves; thus, the wave generator can be positioned quite close to the bay mouth. Three memoranda by Keulegan, giving theoretical developments in tsunami model design, are appended. (Author)