Hi All!

Not being an isotope hydrologist, I would like to make an inquiry I
am sure some of you can answer even without thinking: Are there any
(isotopic?) data available as to the "age" of the water in rivers
of all sizes, esp. at baseflow conditions?
Apart from storage of precipitation as ice and snow, I would guess
that at baseflow it is mostly groundwater from close to the
gw-surface that runs down the river. But is it really all from this
year? Does anyone know how big the portion of older gw
is or the portion of "interflow", especially in the case of bigger
rivers? And how does this influence the "age" of riverine runoff? Any
comments very welcome!

Frank Pawellek
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Frank Pawellek
Institut fuer Geologie
Lehrstuhl fuer Sediment- und Isotopengeologie
Ruhr-Universitaet Bochum
Universitaetsstrasse 150
44801 Bochum
Germany
Phone: +49-234-700-5458
Fax: +49-234-7094-571
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