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60年代以来,随着日本经济高速发展,在濑户内海填海造地,建设机场、铁路、工厂商住地等;同时,人口向濑户内海沿海汇集,造成生活废水、工业废水过量排入海中,导致海域受有机物污染和富营养化,赤潮频繁发生。1972年,竟发生了800多次赤潮。这一年,兵库县养殖业的(鱼师)鱼、鲹鱼、牡蛎等鱼贝类大量死亡,损失金额达19亿日元。此后,虽然采取了一系列措施,对濑户内海进行管理、整治、保护,使水环境有了明显的
Since the 1960s, with the rapid economic development in Japan, reclamation and land reclamation was carried out in the Seto Inland Sea to build airports, railways, factories and residences, etc. At the same time, the population brought along the coasts of the Seto Inland Sea, resulting in excessive discharge of domestic wastewater and industrial wastewater into the sea , Resulting in organic matter pollution and eutrophication in the sea area, frequent occurrence of red tide. In 1972, there were more than 800 red tides. This year, Hyogo aquaculture (fish division) fish, catfish, oysters and other fish and shellfish died in large numbers, the amount of loss of 1.9 billion yen. Since then, although a series of measures have been taken to manage, remediate and protect the Seto Inland Sea and make the water environment clear