HYDRAULIC CHARACTERISTICS OF NEW TYPES OF AIRTIFICIAL REEFS AT KOMATSU OF ISHIKAWA COAST

Abstract

 Hydranlic characteristics of three types of airtificial reefs were evaluated by using field observation data. Attenuation of wave heights and wave periods was comfirmed by all types of airtificial reefs. The wave setup was less than conventional aritificial reefs due to return flow in the structure. Longshore currents are generated behind the reefs depend on incoming wave direction. At the end of the group of airtificial reefs, however, the current direction is biased and it may cause dynamic topography changes.