Peculiarities of ~137Cs vertical migration in pine ecosystem with stem flow,throughfall,litterfall,and infiltrration

摘要

The study is based on long-term monitoring of key plot located in the exclusion zone of Chernobyl NPP(ChNPP).Concentrations and annual fluxes of ~137Cs in the stem flow,crown water (throughfall),litterfall,and lysimetrical water are estimated.In spite of high caesium concentration,the contribution of stem flow to the overall migration process is revealed to be much less than that of throughfall because of larger area of the tree crown compared to the trunk.Total contribution of the crown and stem fluxes to the migration of ~137Cs is about 0.05