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Experimental study on marine environmental creation by using "wave-dissipating blocks surfaced with grooves" was conducted on the front side of breakwater in the Port of Hamada, Shimane Pref. These blocks were made thin and thick grooves on the surface, using modified steel mold. This procedure is appropriate for workability and cost performance rather than other methods such as using ordinary blocks with some attachment plates, etc. This study reveals that two types of grooves on the block show the different functions, i.e., thin grooves as substratum for algae such as kelps, and thick grooves as habitats for shellfishes such as abalones and turban shells. As a result of several years survey, two types of grooves on the surface of the blocks are recognized as a certain kind of function for ecological environment.

EXPERIMENTAL STUDY ON MARINE ENVIRONMENTAL CREATION BY USING WAVE-DISSIPATING BLOCKS SURFACED WITH GROOVES