일본에서의 해양심층수의 다목적 이용개발과 현황

Abstract

In the 1970s, as the world fish catch seemed to have reached its upper limit, it was recognized that ocean protein resources would be exhausted if no countermeasures were taken. In 1986, a five-year project, funded by the Science and Technology Agency of Japan, was begun. Work began at the Deep Sea-Water Laboratory in Kochi, and an experiment commenced on artificial upwelling in Toyama Bay. Using two multi-layered structure of intake pipes 2,650 m in length and 125 m in diameter, Kochi Prefectural Deep Sea-Water Laboratory pumped up 920 tons of DOW per day from a depth of 320 m and 340 m, into large water tanks. Also, surface water is separately taken from a depth of 0.5 m from the coast nearby. Water is used for research and development of various ways of using of DOW related with utilization and policy of organization are introduced with the examples.