CONCENTRATIONS OF CS-137 IN SOILS AND SELECTED FOREST PLANTS IN TAIWAN

Fallout Cs-137 activities in soils and trees were measured from sample s taken in mountainous areas and along three cross-island highways in Taiwan. Typical concentration in near-surface samples is about 5 Bq kg (-1) depending on soil density. No correlation was found between the c oncentrations of Cs-137 and stable elements in soils. Mechanical distu rbance and soil density were identified as major causes for redistribu tion of Cs-137 in both forest soils and trees. The transfer coefficien t of Cs-137 from soil to bastard banian estimated is 0.23.