caa a22 4500 445814497 CHVBK 20180317145221.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10040-010-0655-4 doi (NATIONALLICENCE)springer-10.1007/s10040-010-0655-4 On some methodological problems in the use of environmental tracers to estimate hydrogeologic parameters and to calibrate flow and transport models [Elektronische Daten] [Andrzej Zuber, Kazimierz Różański, Jarosław Kania, Roland Purtschert] Sur quelques problèmes méthodologiques posés par l'utilisation de traceurs naturels dans la détermination de paramètres hydrogéologiques et le calibrage de modèles d'écoulement d'eau souterraine Environmental tracers are used qualitatively for a better formulation of conceptual models and quantitatively for assessing groundwater ages with the aid of box models or for calibrating numerical transport models. Unfortunately, tracers often yield different ages that do not represent uniquely the water ages. Difficulties result also from different definitions of age, e.g. water age, advective age, tracer age, or radiometric tracer age, that are measured differently and depend on aquifer parameters and characteristics of particular tracers. Even the movement of an ideal tracer can be delayed with respect to the advective movement of water due to diffusion exchange between mobile and immobile water zones, which for fissured rocks or thin aquifers, may lead to significant differences between advective and tracer ages, i.e. also between advective and tracer velocities. The advective velocity is of importance in water resources considerations as being related to Darcy velocity, whereas the tracer velocity is a more useful term for the prediction of pollutant transport. When a groundwater system changes from one hydrodynamic steady state to another, environmental tracers need much more time to reach a new steady state. Several tracer studies are recalled as examples of tracer-specific effects on the estimations of groundwater age. Springer-Verlag, 2010 Environmental tracers nationallicence Groundwater age nationallicence Tracer age nationallicence Hydrodynamic age nationallicence Numerical modeling nationallicence Zuber Andrzej Carpathian Branch, Polish Geological Institute, ul. Skrzatów 1, 31560, Kraków, Poland aut Różański Kazimierz Faculty of Physics and Applied Computer Sciences, AGH-University of Science and Technology, Al. Mickiewicza 30, 30059, Kraków, Poland aut Kania Jarosław Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, Al. Mickiewicza 30, 30059, Kraków, Poland aut Purtschert Roland Physics Institute, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland aut Hydrogeology Journal Springer-Verlag 19/1(2011-02-01), 53-69 1431-2174 19:1<53 2011 19 10040 https://doi.org/10.1007/s10040-010-0655-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10040-010-0655-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zuber Andrzej Carpathian Branch, Polish Geological Institute, ul. Skrzatów 1, 31560, Kraków, Poland aut NATIONALLICENCE 700 1- Różański Kazimierz Faculty of Physics and Applied Computer Sciences, AGH-University of Science and Technology, Al. Mickiewicza 30, 30059, Kraków, Poland aut NATIONALLICENCE 700 1- Kania Jarosław Faculty of Geology, Geophysics and Environmental Protection, AGH-University of Science and Technology, Al. Mickiewicza 30, 30059, Kraków, Poland aut NATIONALLICENCE 700 1- Purtschert Roland Physics Institute, University of Bern, Sidlerstrasse 5, 3012, Bern, Switzerland aut NATIONALLICENCE 773 0- Hydrogeology Journal Springer-Verlag 19/1(2011-02-01), 53-69 1431-2174 19:1<53 2011 19 10040 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer