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The use of groundwater age as a calibration target

January 1, 2008

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.

Citation Information

Publication Year 2008
Title The use of groundwater age as a calibration target
Authors Leonard F. Konikow, G.Z. Hornberger, L.D. Putnam, A.M. Shapiro, B.A. Zinn
Publication Type Conference Paper
Publication Subtype Conference Paper
Series Title
Series Number
Index ID 70032422
Record Source USGS Publications Warehouse
USGS Organization

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