Groundwater Age

Many definitions of groundwater age in the literature use the time difference between the “birth” of groundwater and moment we ask the question. The endpoint.
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Groundwater in aquifers is generally older than expected on the basis of flow velocity, and this observation has important implications for interpreting radiometric age determinations.


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Hydrologists commonly account for the aging of water as it flows along streamtubes, but not for the effects of mixing old water from aquitards or confining layers into aquifers, because the rate of mass exchange between aquifers and aquitards can in many cases be assumed to be small. We show, however, that the effect on age of such mixing does not depend on the mixing rate; this is the paradox of groundwater age. Surprisingly, the contribution of aquitards to the age of groundwater in aquifers depends only on the ratio of fluid volume in aquitards to aquifers.

Groundwater Age–a Surrogate for Water Quality on Long Island, New York

This result has broad importance for understanding the relationship between groundwater flow and the distribution of radiometric age. Sign In or Create an Account.


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Measuring Groundwater Ages in Years

Research Article February 01, Paradox of groundwater age Craig M. The best matches between simulated and observed concentrations were found when simulating recharge concentrations that followed the pattern of national MtBE use. Some observations were matched better when recharge was modeled as a plume moving past the well from a spill at one point in time. Modeling and sample results showed that wells with young median ages and narrow age distributions responded more quickly to changes in the contaminant source than wells with older median ages and broad age distributions.

Groundwater Age | Water Chemistry | Environmental Chemistry | Chemistry | Subjects | Wiley

Well depth and aquifer type affect these responses. Regardless of the timing of decontamination, all of these aquifers show high susceptibility for contamination by a highly soluble, persistent constituent.

Groundwater Age Dating

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Detailed Description

Description Groundwater Age is the first book of its kind that incorporates and synthesizes the state-of-the-art knowledge about the business of groundwater dating - including historical development, principles, applications, various methods, and likely future progress in the concept. It is a well-organized, advanced, clearly written resource for all the professionals, scientists, graduate students, consultants, and water sector managers who deal with groundwater and who seek a comprehensive treatment of the subject of groundwater age. He teaches advanced hydrogeology, hydrogeochemistry, and environmental tracers.


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He has industry experience as a geologist and has authored several relevant publications. Permissions Request permission to reuse content from this site. Table of contents Reviews Preface.