Radioactivity Dynamics in forests
ＱDoes radioactive cesium move from the ground surface to underground and into groundwater?【Vertical movement in soil】
ＡWe have found that radioactive cesium in soil scarcely moves to deeper regions.
- A survey in Kawauchi Village, Fukushima Prefecture, shows that the depth distribution of radioactive cesium slightly widened in the depth direction over time.
- Distribution tends to be deeper in slopes than in flat ground such as ridges and paths through forests.
- The amount of 137Cs deposited in the litter layer has been decreasing over time.
- The amount of 137Cs deposited in a 0-3 cm layer of surface soil has been decreasing almost steadily or gradually since 2014.
→ This shows that cesium has hardly migrated from the surface layer to deeper layers, suggesting the possibility that 137Cs remains in the litter layer and the surface soil within a depth of 3 cm.
- Does radioactive cesium move from the ground surface to underground or into groundwater? 【Movement in the water flow in the litter layer】
- Does radioactive cesium move from the ground surface to underground or into groundwater? 【Movement in underground water】
- How much amount of radiocesium discharges into the ocean?
- Dose the radiocesium discharge ratio from rivers depend on the local environment?
- Cs released to the environment by the forest fire?