Publication Details

Reference Category Journals
DOI / URL link
Title (Primary) Nitrate degradation without 15N enrichment: a hydrochemical and isotopic study of a fractured rock aquifer including embedded lakes
Author Bozau, E.; Knöller, K.; Strauch, G.;
Journal Isotopes in Environmental and Health Studies
Year 2006
Department SEEFO; HDG; ISOHYD;
Volume 42
Issue 3
Language englisch;
Keywords fractured rock aquifer; groundwater; lake; nitrate; nitrogen-15; oxygen-18
Abstract Water samples from three quarry lakes and the surrounding fractured rock aquifer were investigated for delta O-18 and delta H-2 (H2O), delta N-15 and delta O-18 (NO3-), as well as anions and cations. Lake water and groundwater can be distinguished by their different chemical and isotopic composition. Because of evaporation processes, O-18 and H-2 are enriched in the lake water and can be used as natural tracers for the water dynamic of the lakes. The groundwater is characterised by high nitrate concentrations (up to 120 mg/l). Lake internal processes reduce the nitrate concentration in the quarry lakes. However, no enrichment of delta N-15 and delta O-18 in nitrate, typical for microbial nitrate degradation, is observed in the lake water. Because of the complex flow paths in the fractured rock aquifer and the intense chemical transformations at the interface between groundwater and lake water, isotopic and hydrochemical data of lake water and groundwater alone do not conclusively explain hydrological and hydrochemical processes of the investigated lake-groundwater system
ID 2531
Persistent UFZ Identifier http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=2531
Bozau, E., Knöller, K., Strauch, G. (2006):
Nitrate degradation without 15N enrichment: a hydrochemical and isotopic study of a fractured rock aquifer including embedded lakes
Isot. Environ. Health Stud. 42 (3), 251 - 260