Wyhlidal Stefan, Rank Dieter, Schott Katharina, Heiss Gerhard, Goetz Jason
a Department of Health and Environment , Austrian Institute of Technology - AIT , Tulln , Austria.
Isotopes Environ Health Stud. 2014;50(4):448-60. doi: 10.1080/10256016.2014.899596. Epub 2014 Mar 31.
Results of stable isotope measurements (δ(2)H, δ(18)O) of daily grab samples, taken from the Danube River at Tulln (river km 1963) during 2012, show seasonal and short-term variations depending on the climatic/hydrological conditions and changes in the catchment area (temperature changes, heavy rains and snow melt processes). Isotope ratios in river water clearly reflect the isotopic composition of precipitation water in the catchment area since evaporation influences play a minor role. Average δ(2)H and δ(18)O values in 2012 are-78‰ and-11.0‰, respectively, deuterium excess averages 10‰. The entire variation amounts to 1.8‰ in δ(18)O and 15‰ in δ(2)H. Quick changes of the isotopic composition within a few days emphasise the necessity of daily sampling for the investigation of hydrological events, while monthly grab sampling seems sufficient for the investigation of long-term hydro-climatic trends. (3)H results show peaks (half-width 1-2 days, up to about 150 TU) exceeding the regional environmental level of about 9 TU, probably due to releases from nuclear power plants.
2012年期间，从图尔恩（河公里1963处）的多瑙河采集的每日抓取样本的稳定同位素测量结果（δ(2)H、δ(18)O）显示，其存在季节性和短期变化，这取决于气候/水文条件以及集水区的变化（温度变化、暴雨和融雪过程）。由于蒸发影响较小，河水中的同位素比率清楚地反映了集水区降水的同位素组成。2012年的平均δ(2)H和δ(18)O值分别为-78‰和-11.0‰，氘过量平均为10‰。δ(18)O的总变化量为1.8‰，δ(2)H的总变化量为15‰。同位素组成在几天内的快速变化强调了每日采样对于调查水文事件的必要性，而每月抓取采样似乎足以调查长期水文气候趋势。(3)H结果显示峰值（半高宽1 - 2天，高达约150 TU）超过了约9 TU的区域环境水平，这可能是由于核电站的排放所致。
