Brittain J E, Bjørnstad H E, Salbu B, Oughton D H
Freshwater Ecology and Inland Fisheries Laboratory (LFI), University of Oslo, Norway.
Analyst. 1992 Mar;117(3):515-9. doi: 10.1039/an9921700515.
The amounts of 137Cs and 90Sr have been determined in the inflows and outflows of the Norwegian sub-alpine lake, Ovre Heimdalsvatn, in March/April during the period of ice-cover, when discharge is extremely stable. The lake is situated in an area contaminated by Chernobyl fallout. The transported course particulate plant material has been collected in traps; the particles and colloids have been removed from water samples by cross-flow ultrafiltration. On the basis of radionuclide inputs and outputs, lake budget calculations have been made for 137Cs and 90Sr during the period of ice-cover. Daily transport of radionuclides is considerably less than that observed during the spring snowmelt period when discharges are high. Size distribution patterns of Cs and Sr observed during winter are compared with previously published data from the same lake during the spring spate. The retention of 137Cs is similar in winter and spring, but retention of 90Sr is greater in winter.
在冰盖期的3月/4月，挪威亚高山湖泊奥弗勒·海姆达尔湖（Ovre Heimdalsvatn）流量极为稳定时，已对其流入和流出水中的137铯和90锶含量进行了测定。该湖泊位于受切尔诺贝利沉降物污染的区域。已在收集器中采集了输送过程中的颗粒状植物物质；通过错流超滤从水样中去除了颗粒和胶体。基于放射性核素的输入和输出，已对冰盖期的137铯和90锶进行了湖泊收支计算。放射性核素的日输送量远低于春季融雪期流量高时观察到的输送量。将冬季观察到的铯和锶的粒径分布模式与该湖泊春季洪水期先前公布的数据进行了比较。137铯在冬季和春季的滞留情况相似，但90锶在冬季的滞留量更大。
