The use of groundwater age as a calibration target

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Groundwater age (or residence time), as estimated on the basis of concentrations of one or more environmental tracers, can provide a useful and independent calibration target for groundwater models. However, concentrations of environmental tracers are affected by the complexities and mixing inherent in groundwater flow through heterogeneous media, especially in the presence of pumping wells. An analysis of flow and age distribution in the Madison aquifer in South Dakota, USA, illustrates the additional benefits and difficulties of using age as a calibration target. Alternative numerical approaches to estimating travel time and age with backward particle tracking are assessed, and the resulting estimates are used to refine estimates of effective porosity and to help assess the adequacy and credibility of the flow model.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title The use of groundwater age as a calibration target
ISBN 9781901502497
Issue 320
Year Published 2008
Language English
Larger Work Title IAHS-AISH Publication
First page 250
Last page 256
Conference Title International Conference on Calibration and Reliability in Groundwater Modelling: Credibility of Modelling, M
Conference Location Copenhagen
Conference Date 9 September 2007 through 13 September 2007