Abstract
The paper deals with the isotope balance method applied to lakes, which can be assumed as being under steady-state conditions. It is shown that the long-term averages and non-normalized temperatures can be used in the balance equations. The applicability of the proposed approach was tested by the interpretation or reinterpretation of several known case studies (Chala, Titicaca, Waid, Burdur, Beysehir and Egridir lakes). An isotope study of a small artificial lake (1.2 · 10 6 m 3) is presented and compared with whole-body tracing by K 3 60 Co(CN) 6. This artificial tracer does not appear useful for long-term tracing of surface waters. The water balance equation for each of the lakes considered was solved with the aid of the isotope balance equation of 18O. Applying the calculated components of the water balance, the isotope balance equation of deuterium was solved for finding the values of kinetic enrichment for deuterium. These values, which give the fit of the evaporation lines to the experimental data, do not agree with the values known from direct laboratory experiments, thus they have to be treated as apparent values, which may be useful for future field work.
Published Version
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