Av. Konoplev et al., MODEL TESTING USING CHERNOBYL DATA .1. WASH-OFF OF SR-90 AND CS-137 FROM 2 EXPERIMENTAL PLOTS ESTABLISHED LN THE VICINITY OF THE CHERNOBYL REACTOR, Health physics, 70(1), 1996, pp. 8-12
The ''Wash-off' scenario is designed to test models concerned with the
movement of trace contaminants from terrestrial sources to bodies of
water, specifically the contamination of surface water by wash-off of
radionuclides initially deposited onto soils. Particular emphasis is p
laced on chemical speciation and on the geochemical and geophysical pr
ocesses affecting transfer of contaminants from soil to water. The sce
nario gives descriptions of two experimental plots near the Chernobyl
power plant, one using heavy rain and one using snow melt, together wi
th characteristics of the initial aerial deposition of the radionuclid
es and data on topography, soil type and characteristics, and time-var
ying precipitation. Predictions are requested for (1) the vertical dis
tribution of concentrations of exchangeable and nonexchangeable forms
of Cs-137 and Sr-90 in the soil of the experimental plots, (2) concent
rations of Cs-137 and Sr-90 in runoff water from the experimental plot
s, and (3) total amounts of Cs-137 and Sr-90 removed by runoff from th
e experimental plots. Test data (field measurements) are available for
all endpoints.