Figure 3 | Scientific Reports

Figure 3

From: Radiocesium levels in contaminated forests has remained stable, even after heavy rains due to typhoons and localized downpours

Figure 3

Chronological changes in ambient dose rates along the Mt Okura hiking trail. (A) Whole variation in ambient dose rates. The data were obtained by a walking survey conducted during October to December 2019 using a RADI-PROBE system. The single asterisk shows maximum µSv/h values. Maximum values were consistently measured at the same locations (Supplementary S1). The double asterisk shows a heavy rainfall events such as typhoon or downpour and precipitation measured at a weather station in Kawauchi Village near Mt Okura. The 466 mm of precipitation due to Typhoon 19 during October 11 to 14, 2019 was equivalent to three times the monthly average (JMA, Tokyo, Japan. Available from: https://www.data.jma.go.jp/obd/stats/etrn/view/daily_a1.php?prec_no=36&block_no=1129&yeye=2019&month=10&day=&view=); (B) Separate variation in ambient dose rates. Red arrows show the same location on the hiking trail (showed the maximum value). Walking speed except for breaks was in the range 1.3–1.6 m/s.

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