THE RECORD OF DEPOSITION OF RADIONUCLIDES IN THE SEDIMENTS OF PONSONBY TARN, CUMBRIA

被引：8

作者：

BONNETT, PJP ^{[1
]}

CAMBRAY, RS ^{[1
]}

机构：

[1] UKAEA,HARWELL LAB,DIV ENVIRONM & MED SCI,MODELLING & ASSESSMENTS GRP,HARWELL OX11 0RA,BERKS,ENGLAND

来源：

HYDROBIOLOGIA | 1991年 / 214卷

关键词：

RADIONUCLIDE INVENTORIES; SELLAFIELD; CHERNOBYL; WEAPONS FALLOUT; CS-134; CS-137; ACTIVITIES; DIATOM ANALYSIS;

D O I：

10.1007/BF00050933

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

A study has been made of the radionuclide content of sediments from Ponsonby Tarn in Cumbria to examine the pattern of deposition of radiocaesium and actinides upon the catchment. Sediment cores obtained from the tarn in 1986 were dated by core correlation and compared with results obtained from a previous study in 1980 (Eakins & Cambray, 1985). Sediments from the tarn contained actinides derived mainly from discharges to atmosphere. The 1986 cores contain greater quantities of weapons fallout derived caesium than may be accounted for by direct atmospheric input but less attributable to the Chernobyl accident than expected. Diatom analysis together with increased sediment accumulation rates post 1980 suggest that complex patterns of sedimentation have contributed to the changes evident in the sediment.

引用

页码：63 / 70

页数：8