Cs-137 vertical distribution in lacustrine sediments of the Danube Delta

Radiometric investigation of Cs-137 vertical profiles has been performed in seven cores collected from six lakes located in the Danube Delta. All prof iles are characterized by the presence of a single radiocesium maximum. Two subtypes of vertical profiles have been evidenced. The first one, illustra ted by a shallow maximum, is specific to the relatively isolated small lake s, while the second one, particularized by a deeper maximum and greater tot al radiocesium inventory is representative for the lakes connected to the D anube river main branches. The numerical data concerning the sedimentation rate, radiocesium total inventory and maximum penetration depth have been i nterpreted in connection with water flow, sediments origin as well as trans port and accumulation processes. Copyright (C) 2000 by Marcel Dekker, Inc.