| 摘要 |
PURPOSE: A stepped artificial reef for habitation of shellfish and forming sea forest is provided, which can protect marine resources of coast by securing a space for fish and shellfish. CONSTITUTION: A stepped artificial reef comprises: a main body(20) of a trapezoidal shape in which the width is gradually widened toward the bottom, both sides are opened, and an internal space is prepared; a communication unit(40) which is formed in the front and rear of the main body and communicates the outside of the main body and a internal space; a flange part(50) which is formed in the lower part of the main body and prevents subsidence of the main body; ribs(60) which are projected from the outside of the maim body at an interval; a shellfish residence unit; and a dummy line(70) fixed to the ribs by a fixed unit. |
