Weekly Forecast

　　In the coming days, after the Kuroshio Current passes near Fukushima, Japan, it will turn eastward and enter the eastern waters of Honshu, Japan, at 43.0°N and 144.2°E. The maximum current speed in this area is approximately 2.3 m/s, and the current flows generally eastward, joining the extended Kuroshio Current, where the maximum current speed is approximately 3.3 m/s. The current then flows northeastward and merges into the North Pacific Current. Along the Fukushima coast, it will move slowly northward, largely influenced by the north-south tidal movement and the Kuroshio Current.

　　In the seven-day forecast simulation, the discharged tritium-containing wastewater will be influenced by the Kuroshio Current and the North Pacific Current, spreading eastward. The primary affected area is the eastern waters of Honshu, Japan, where the maximum concentration reaches 1 x 10⁻⁴ Bq/L. The secondary affected area is the eastern part of the Kuroshio Current, where the maximum concentration reaches 1 x 10⁻⁵ Bq/L. Furthermore, the 10⁻⁷ Bq/L concentration line extends eastward to approximately 154.5 degrees west longitude and southward to approximately 20.5 ˚N latitude.
　　With emissions ceased, the recently discharged tritium-containing wastewater is primarily affected by the north-south tidal currents along the Fukushima coast, slowly spreading northward. The maximum concentration at a radius of 50 km from the discharge point reaches 1 x 10⁻⁴ Bq/L. Overall, based on the 10⁻⁷ Bq/L concentration threshold, the affected area covers approximately 5547 km east of the discharge point and approximately 3385 km north-south.

　　The 10^-7 Bq/L concentration line is 1,163 km away from Taiwan Island and will have no impact on the waters surrounding Taiwan in the next 7 days.