Weekly Forecast

　　In the coming days, after the Kuroshio Current passes near Fukushima, Japan, it will continue to move northeastward, entering the eastern waters of Honshu at 36.0°N and 142.0°E. The maximum current speed in this area is approximately 1.4 m/s, and the current direction is generally northeast-east. It will then enter the extended Kuroshio Current, where the maximum current speed is approximately 1.7 m/s, before merging northeast-east 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 10⁻⁵ Bq/L. The secondary affected area is the eastern region of the Kuroshio Current, where the maximum concentration also reaches 1 x 10⁻⁵ Bq/L. Furthermore, the 10⁻⁷ Bq/L concentration isotherm extends eastward to approximately 154.0 degrees west longitude and southward to approximately 20.75 ˚N latitude.
　　Under continuous discharge conditions, the recently discharged tritium-containing wastewater is mainly affected by the north-south tides along the Fukushima coast, slowly spreading northward. The maximum concentration reaches 1 x 10⁻² Bq/L at a radius of 50 km from the discharge point. Overall, based on a concentration threshold of 10⁻⁷ Bq/L, the affected area covers approximately 5589 km east of the discharge point and approximately 3524 km north-south.

　　The 10^-7 Bq/L concentration line is 1690 km away from Taiwan Island and will have no impact on the waters surrounding Taiwan in the next 7 days.