A 50 Years' Isotope Record of the Danube River Water and Its Relevance for Hydrological, Climatological and Environmental Research

作者：Rank Dieter^*; Wyhlidal Stefan; Schott Katharina; Jung Martin; Heiss Gerhard; Tudor Marian

来源：Acta Zoologica Bulgarica, 2014, 109-115.

• Isotope hydrology
• climate change
• Danube River
• deuterium (H-2)
• tritium (H-3)
• oxygen-18 (O-18)

The isotope record of the Danube River water at Vienna station probably is the longest dataset of a large river worldwide: H-3 record since 1963, stable isotopes H-2 and O-18 records since 1968. From the H-2-O-18 relation ("deuterium excess") can be concluded that the isotopic composition in the Danube River water reflects mainly the isotopic relations in the precipitation in the catchment area with some delay due to the residence time of the precipitation water in the catchment. It allows drawing hydro-meteorological conclusions on a larger scale based on a relatively small number of measurements. The stable isotope time series shows significant changes on a decadal scale. Since 1952, the H-3 content in the precipitation and the Danube River water has been dominated by the H-3 releases of nuclear weapon tests. From this H-3 record a mean residence time of about three years of precipitation water in the Danube River catchment upstream of Vienna can be calculated (mainly base flow). A similar value can be found by using the climatologic signal of the stable isotope time series. Since about 1995 short-term H-3 elevations owing to releases from nuclear power plants have been detected. In order to obtain an isotopic database for the entire Danube River Basin, the Danube River water sampling at Tulcea (delta region) was carried out in 2009.

• 出版日期2014-6