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This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
A systematic survey of dissolved uranium activity was carried out in the Seine and the Marne over one year. A small watershed, the Grand Morin, included in the Seine one, was also investigated from stream to medium-sized rivers. The Melarchez stream exhibits low but variable dissolved ^2^3^8U levels (3.3+/-2.0mBql^-^1). Thereafter, uranium activities show a rapid increase to reach, from the Grand Morin River, a rather constant range (8-11 mBq l^-^1). On the Marne before the confluence with the Seine, dissolved ^2^3^8U is nearly invariable (9.1+/-0.8mBql^-^1), for flow rates comprised between 60 and 423 m^3 s^-^1. Dissolved ^2^3^8U in the Seine corresponds to almost triple the global mean riverine uranium concentration. In the estuary of the Seine, uranium shows a gradual increase, resulting from conservative mixing of river with sea waters. ... Read more