Japan's Seto Inland Sea "Too Clean" Affects Fisheries Government: Will Organize "Sewage Discharge"

Source: Overseas Network

Seto Inland Sea, Japan (infographic)

Overseas network on October 25, according to the Japanese News Agency reported on the 25th, in order to change the current situation of the reduction in fish catches in some parts of the Seto Inland Sea due to "too clean", Japan's Ministry of the Environment plans to discharge nutrient-rich "sewage" into the sea.

According to the report, in recent years, due to the lack of nitrogen, phosphorus and other nutrients in the seawater, the Seto inland sea area has been cultivated in the seaweed color has become lighter, and the catch has decreased. An official from Japan's Ministry of the Environment said that "the sea is too clean" and that measures will be taken to improve the situation and protect fisheries and aquaculture.

Specific measures include adjusting the operation of sewage treatment plants around the Seto Inland Sea to increase the discharge of nutrients during the seaweed farming season from autumn to spring of the following year, and opening the sludge at the bottom of reservoirs and reservoirs to discharge sludge into the sea.

At present, some surrounding areas have taken "sewage discharge" measures. In order to further increase the nutrient content in seawater, The Ministry of the Environment plans to amend the Setouchi Act in 2021 to implement different water quality management measures according to different sea conditions, and the marine areas where nori is cultured will increase nutrient emissions, while the areas where amberjack and sea bream are cultured will continue to improve water quality.

The Seto Inland Act, whose full name is the Seto Inland Sea Environmental Protection Special Act, was enacted in 1973. The Act imposes strict restrictions on discharge from surrounding sewage treatment plants and plants, effectively reducing the water quality of the Seto Inland Sea after its implementation, but adversely affecting nori culture and fishing. (Overseas Network Wang Xiluo)

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