Abstract
Cs-137 is the radioecologically most important radionuclide that reached the Nordic countries after the Chernobyl accident, as the isotope has a long physical half life and is efficiently accumulated by organisms. In a forest lake, situated in central Sweden, the horizontal and vertical distribution of Cs-137 activities in the lake sediment were investigated together with sediment characteristics, to illustrate the course of recovery and sediment movements. Cs-137 has a strong affinity for particulate matter and about 99% of the total cesium content of lakes is now considered to be sedimentary bound, but is still redistributed by sedimentological processes. Resuspension of particulate matter maintains high concentrations of cesium both in the water column and at the sediment surface, and is of crucial importance for the amount of the cesium pool that is biologically available and also for the time of a lakes recovery. Due to the high affinity of cesium for particulate matter it is possible to point at areas characterized by erosion, transportation or accumulation of particulate matter. Resuspension and redistribution have been seen to be of importance in the lake, probably due to wave induced erosion and bioturbation in shallow areas, and focusing of the particulate matter towards deeper
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Citation Formats
Konitzer, K.
Redistribution of Cs-137 in sediments caused by sediment movements; Sedimentroerelsers betydelse foer foerdelning och tillgaenglighet av Cs-137 i en mellansvensk skogssjoe.
Sweden: N. p.,
1992.
Web.
Konitzer, K.
Redistribution of Cs-137 in sediments caused by sediment movements; Sedimentroerelsers betydelse foer foerdelning och tillgaenglighet av Cs-137 i en mellansvensk skogssjoe.
Sweden.
Konitzer, K.
1992.
"Redistribution of Cs-137 in sediments caused by sediment movements; Sedimentroerelsers betydelse foer foerdelning och tillgaenglighet av Cs-137 i en mellansvensk skogssjoe."
Sweden.
@misc{etde_10126923,
title = {Redistribution of Cs-137 in sediments caused by sediment movements; Sedimentroerelsers betydelse foer foerdelning och tillgaenglighet av Cs-137 i en mellansvensk skogssjoe}
author = {Konitzer, K}
abstractNote = {Cs-137 is the radioecologically most important radionuclide that reached the Nordic countries after the Chernobyl accident, as the isotope has a long physical half life and is efficiently accumulated by organisms. In a forest lake, situated in central Sweden, the horizontal and vertical distribution of Cs-137 activities in the lake sediment were investigated together with sediment characteristics, to illustrate the course of recovery and sediment movements. Cs-137 has a strong affinity for particulate matter and about 99% of the total cesium content of lakes is now considered to be sedimentary bound, but is still redistributed by sedimentological processes. Resuspension of particulate matter maintains high concentrations of cesium both in the water column and at the sediment surface, and is of crucial importance for the amount of the cesium pool that is biologically available and also for the time of a lakes recovery. Due to the high affinity of cesium for particulate matter it is possible to point at areas characterized by erosion, transportation or accumulation of particulate matter. Resuspension and redistribution have been seen to be of importance in the lake, probably due to wave induced erosion and bioturbation in shallow areas, and focusing of the particulate matter towards deeper areas. Mixing of the sediment has also been seen to be extensive in large parts of the lake, but the cesium profiles in the deepest protected parts of the lake are still fully reflecting the short event of radioactive fallout 1986.}
place = {Sweden}
year = {1992}
month = {Dec}
}
title = {Redistribution of Cs-137 in sediments caused by sediment movements; Sedimentroerelsers betydelse foer foerdelning och tillgaenglighet av Cs-137 i en mellansvensk skogssjoe}
author = {Konitzer, K}
abstractNote = {Cs-137 is the radioecologically most important radionuclide that reached the Nordic countries after the Chernobyl accident, as the isotope has a long physical half life and is efficiently accumulated by organisms. In a forest lake, situated in central Sweden, the horizontal and vertical distribution of Cs-137 activities in the lake sediment were investigated together with sediment characteristics, to illustrate the course of recovery and sediment movements. Cs-137 has a strong affinity for particulate matter and about 99% of the total cesium content of lakes is now considered to be sedimentary bound, but is still redistributed by sedimentological processes. Resuspension of particulate matter maintains high concentrations of cesium both in the water column and at the sediment surface, and is of crucial importance for the amount of the cesium pool that is biologically available and also for the time of a lakes recovery. Due to the high affinity of cesium for particulate matter it is possible to point at areas characterized by erosion, transportation or accumulation of particulate matter. Resuspension and redistribution have been seen to be of importance in the lake, probably due to wave induced erosion and bioturbation in shallow areas, and focusing of the particulate matter towards deeper areas. Mixing of the sediment has also been seen to be extensive in large parts of the lake, but the cesium profiles in the deepest protected parts of the lake are still fully reflecting the short event of radioactive fallout 1986.}
place = {Sweden}
year = {1992}
month = {Dec}
}