ISSN:
1573-515X
Keywords:
137Cs
;
sediment dating
;
radionuclide inventories
;
freshwater lakes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Geosciences
Notes:
Abstract Depth distributions and inventories of137Cs (mCi km2) were determined in sediment from several fresh water lakes in the New York State Adirondack Preserve. Included were Big Moose and Darts Lakes, part of the North Branch of the Moose River system, as well as North, Sagamore, South, and Woods Lakes and the ‘seepage pond’, Tamarack Lake. Comparisons were made between the137Cs inventories in these lakes and large inpoundments in the Adirondacks (Hinkley, Great Sacandaga, Stillwater and Cranberry Lake Reservoirs) and other large impoundments and lakes located in various regions of the U.S., especially Cayuga Lake, Ithaca, NY. None of the Adirondack Lakes had137Cs distributions with depth in sediment that closely resembled the deposition pattern of weapons testing as a function of time. All of the natural lakes and small impoundments, including the seepage pond, were found to have significantly lower inventories of137Cs than expected; while the large reservoirs were generally enhanced in137Cs. We suggest that more than one mechanism may be responsible for the low sediment inventories: for the majority of lakes, flushing of137Cs out of the lakes during periods of thermal stratification and ice thaw; and for the seepage pond, remobilization of137Cs into the water column due to biological recycling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02185195
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