Radioactivity Dynamics in River System
(2015)
QDo sediment with high radioactive cesium concentration continue to be deposited on river bottoms?
AInvestigations in Fukushima Prefecture have revealed that the concentration of radioactive cesium in river bottoms is generally one or two orders of magnitude lower than in riverbeds*1.
Fig.1 Concentration of radioactive cesium in surface soil of riverbeds (maximum concentration) and surface sediments of river bottoms at various measuring spots in the Ukedo River and the Odaka River
※ 3~8 samples were taken at each measuring site in riverbeds. The data shown in the figures are the maximum values in these spots.
Reference :*1 “Investigation of Environmental Monitoring Related to Radioactive Materials in Disaster Area of the Great East Japan Earthquake: Region of Public Water ” (Ministry of Environment)
Related articles
- Is there a continuous input of cesium contamination to rivers from forests?
- How much amount of radiocesium discharges into the ocean?
- In what kinds of land use is radioactive cesium deposited? How much is deposited?
- How much did the amount or the concentration of Cs released to river water by forest fire? How did them change by time?