Radioactivity Dynamics in River System
= Movement in Rivers =
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Q Are areas around rivers dangerous? Is river water contaminated with cesium still running?
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Q In what kinds of land use is radioactive cesium deposited? How much is deposited?
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Q Is it possible to use water from contaminated rivers and reservoirs for irrigation water?
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Q Do dose rates in riverbeds increase after heavy rains? 【Difference between high and low water channels】
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Q Do dose rates in riverbeds increase after heavy rains? 【Tendency of the change of air dose rate】
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Q Do dose rates in riverbeds increase after heavy rains? 【Changes of air dose rate in heavy rain】
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Q How much radiation dose is expected for water-based recreational activities?
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Q How is the cesium concentration in river water changing over time? 【Northern Fukushima prefecture】
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Q How is the cesium concentration in river water changing over time? 【Southern Fukushima prefecture】
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Q How has the radioactive Cs concentration in river water changed with time? 【Recent trend (2018)】
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Q Does the concentration of radioactive cesium in river water increase after rainfall? 【Changes of the concentration of 137Cs in heavy rain】
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Q Does the concentration of radioactive cesium in river water increase after rainfall? 【Effect of the upstream dam on the 137Cs concentration】
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Q Do high concentrations of radioactive cesium continue to be deposited on riverbeds? 【Deposition of sediment in riverbeds】
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Q Do high concentrations of radioactive cesium continue to be deposited on riverbeds? 【137Cs concentration where sediment continuously deposit】
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Q Do sediment with high radioactive cesium concentration continue to be deposited on river bottoms?
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Q Is there a continuous input of cesium contamination to rivers from forests?
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Q How much amount of radiocesium discharges into the ocean?
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Q Dose the radiocesium discharge ratio from rivers depend on the local environment?
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Q Where is the radiocesium in river water coming from?
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Q How do rainfalls affect turbidity and radioactive cesium concentrations in river water?【Example of analysis】
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Q Which parts of the river is radioactive cesium more likely to accumulate? 【Example of analysis】
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Q How does radioactive cesium carried down by rivers move in the sea? 【Example of analysis】
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Q What kinds of places have high concentrations of cesium dissolved in river water?
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Q Will heavy rain cause the runoff of deposited cesium? 【Radioactive cesium migration caused by torrential rain in October 2019: Upper river basin】
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Q Will heavy rain cause the runoff of deposited cesium? 【Radioactive cesium migration caused by torrential rain in October 2019: Middle to lower river basin】
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Q If there is an unprecedentedly large outflow of water, can you still predict the transfer of radioactive cesium?
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Q Does defoliation of forests affect the concentration of cesium dissolved in river water?
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Q How is radioactive cesium deposited on land expected to move in the future?
= Movement in Dams =
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Q Is it possible to use river water for drinking water?
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Q Will the concentration of radioactive cesium in lake water remain high unless contaminated sediments are removed from reservoir beds?
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Q Will the concentration of radioactive cesium in lake water remain high unless contaminated sediments are removed from reservoir beds? 【Tendency of the change of the concentration in reservoir beds】
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Q Does the concentration of radioactive cesium increase due to the resuspension of sediments by heavy rains?
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Q Will radioactive contamination continue to accumulate in reservoirs due to the inflow of radioactive cesium from rivers? 【Tendency of the change of the concentration in reservoir beds】
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Q Will radioactive contamination continue to accumulate in reservoirs due to the inflow of radioactive cesium from rivers? 【Effect of the upstream dam on 137Cs accumulation in the riservoir beds】
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Q Will radioactive contamination continue to accumulate in reservoirs due to the inflow of radioactive cesium from rivers? 【Technology for prediction of the future concentration of 137Cs】
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Q Wouldn't radioactive cesium accumulated at the bottom of lakes, dams, etc. dissolve and affect the ecosystem and farming operations downstream?
= Movement in Marine =
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Q Do radiation does will increase using bathing beach?
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Q How is the concentration of radioactive cesium in seawater and marine sediment changing?
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Q Does contamination of estuaries continue due to continuous outflow of radioactive cesium from rivers?
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Q How extent does radiocesium flowing in from rivers affect the coastal environment?