München 1997 – wissenschaftliches Programm

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ST: Strahlenphysik und Strahlenschutz

ST 2: Radioökologie

ST 2.3: Vortrag

Donnerstag, 20. März 1997, 14:45–15:00, HS 129

Parameterization of Radiocaesium Soil-Plant Transfer using Soil Characteristics — •Alexei Konoplev, J"org Drissner, Eckehard Klemt, Irina Konopleva, and Gregor Zibold — Fachhochschule Ravensburg-Weingarten, Postfach 1261, D-88241 Weingarten

A model of Cs-137 soil - plant transfer is proposed, combining two separate approaches: a) on the distribution of radiocaesium in the soil - soil solution system and b) on the transfer in soil solution - plant system. Within this model, the radiocaesium transfer turns out to be a linear function of one soil parameter. This parameter is actually a combination of the basic soil properties determining the Cs distribution in soil - soil solution - plant root system. The approach is applied to analyse the variability of Cs-137 aggregated transfer factor Tag of fern for eight spruce forest sites in Baden-W"urttemberg, initially subdivided into two different transfer groups according to the orders of magnitude of Tag and some external soil properties (kind of humus and its thickness, pH). It is shown that a linear relationship exists within each transfer group, however, the slopes of this dependence are different for the different transfer groups.