Land use types control solid wash-off rate and entrainment coefficient of Fukushima-derived Cs, and their time dependence

Wakiyama, Yoshifumi*; Onda, Yuichi*; Yoshimura, Kazuya; Igarashi, Yasunori*; Kato, Hiroaki*

Journal of Environmental Radioactivity, 210, p.105990_1 - 105990_12, 2019/12

https://doi.org/10.1016/j.jenvrad.2019.105990

Measurement of ambient dose equivalent rates by walk survey around Fukushima Dai-ichi Nuclear Power Plant using KURAMA-II until 2016

Ando, Masaki; Yamamoto, Hideaki*; Kanno, Takashi*; Saito, Kimiaki

Journal of Environmental Radioactivity, 190-191, p.111 - 121, 2018/10

https://doi.org/10.1016/j.jenvrad.2018.04.025

Ambient dose equivalent rates in various environments related to human lives were measured by walk surveys using the KURAMA-II systems from 2013 to 2016 around the Fukushima Dai-ichi Nuclear Power Plant. The dose rate of the locations where the walk survey was performed decreased to about 38% of its initial value in the 42 months, which was beyond that attributable to the physical decay. The air dose rates decreased depending on the level of the evacuation areas, and the decrease was slightly larger in populated areas where humans are active. The comparison of walk survey data with car-borne survey data indicated that the air dose rate varies largely even within a 100 m square area. The dose rates measured by the walk surveys were estimated to be medial of those along roads and those of undisturbed flat ground. The air dose rates measured by the walk surveys decreased quickly compared with the air dose rate from the flat ground measurement.

Comparative studies in the local circulations induced by land-use and by topography

Lee, S.; Kimura, Fujio*

Boundary-Layer Meteorology, 101(2), p.157 - 182, 2001/11

https://doi.org/10.1023/A:1019219412907

no abstracts in English

Changes in distribution and types of plastic debris in urban river shores, Ulaanbaatar city, Mongolia

Munkhbat, D.*; Kawahigashi, Masayuki*; Battulga, B.; Bolormaa, O.*; Sainjargal, B.*

no journal, ,