An investigation in Kawamata Town, Fukushima Prefecture has revealed that even in forest roads where wind easily blow through, air dose rates did not increase after windy weather (maximum wind speed: 10 m/s, intermittently continued for few days).

In Kawamata Town, Fukushima Prefecture, heavy rain (precipitation amount: 65.4 mm in 2 hours) was observed, and muddy stream flowed in mountain roads. Nevertheless, air dose rates did not increase so much at that time.

Fig.1　Results for continuous measurements on weather and air dose rates in Kawamata Town

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