he isotope tracer techniques are applied to explore the transfer of HTO from waterbody to land.The results show that when HTO entered a water body,it would transfer toother compartments in the ecosystem,and HTO in the water phase showed a monotonous de-crease with time。However the concentration of HTO in either sediment or aquatic life was in-creased to a peak in a period and then declined gently.Tritium of HTO present in sedimentand aquatic life is in two forms,i.e.,tritium in free water and bounded tritiu...