ECO-FRIENDLY TECHNOLOGIES FOR FISHING PORT FACILITIES IMPROVEMENT IN OKINAWA REGARDING TO CORAL, MANGROVE, ETC.

Abstract

Reviewing past examples of eco-friendly technologies, as well as findings from field surveys, we applied those results for improvement works of fishing port facilities in Okinawa.
In regard to coral reservation and restoration for the project of constructing outskirt structures such as breakwaters, it is advisable to employ the existing methods of transplanting or relocating coral reefs, or the methods expediting coral larvae settlement by uneven-surfaces on substrate. The newly conducted field survey of the waterway in Tonoshiro Fishing Port indicates that adopting gently inclined slopes in waterways is considered to be a feasible option for coral reestablishment and it is desirable to install stable substrata on the bottom of waterways. Regarding to mangrove restoration on and around port structures, it is necessary to take into consideration the fact that the settlement and growth of seedlings can be affected by waves.